grub/configure.ac

# -*- autoconf -*-

# Process this file with autoconf to produce a configure script.

# Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009,2010  Free Software Foundation, Inc.
#
# This configure.ac is free software; the author
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.

dnl This configure script is complicated, because GRUB needs to deal
dnl with three potentially different types:
dnl
dnl   build  -- the environment for building GRUB
dnl   host   -- the environment for running utilities
dnl   target -- the environment for running GRUB
dnl
dnl In addition, GRUB needs to deal with a platform specification
dnl which specifies the system running GRUB, such as firmware.
dnl This is necessary because the target type in autoconf does not
dnl describe such a system very well.
dnl
dnl The current strategy is to use variables with no prefix (such as
dnl CC, CFLAGS, etc.) for the host and target type, variables with
dnl prefix "BUILD_" (such as BUILD_CC, BUILD_CFLAGS, etc.) for the
dnl build type, variables with prefix "HOST_" (such as HOST_CC,
dnl HOST_CFLAGS, etc.) for the host type and variables with the prefix
dnl "TARGET_" (such as TARGET_CC, TARGET_CFLAGS, etc.) are used for
dnl the target type. See INSTALL for full list of variables and
dnl description of the relationships between them.

AC_INIT([GRUB],[2.06~rc1],[bug-grub@gnu.org])

AC_CONFIG_AUX_DIR([build-aux])

# We don't want -g -O2 by default in CFLAGS
: ${CFLAGS=""}

# Checks for build, host and target systems.
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
save_program_prefix="${program_prefix}"
AC_CANONICAL_TARGET
program_prefix="${save_program_prefix}"

AM_INIT_AUTOMAKE([1.11])
AC_PREREQ(2.63)
AC_CONFIG_SRCDIR([include/grub/dl.h])
AC_CONFIG_HEADER([config-util.h])

# Explicitly check for pkg-config early on, since otherwise conditional
# calls are problematic.
PKG_PROG_PKG_CONFIG

# Program name transformations
AC_ARG_PROGRAM
grub_TRANSFORM([grub-bios-setup])
grub_TRANSFORM([grub-editenv])
grub_TRANSFORM([grub-install])
grub_TRANSFORM([grub-mkconfig])
grub_TRANSFORM([grub-mkfont])
grub_TRANSFORM([grub-mkimage])
grub_TRANSFORM([grub-glue-efi])
grub_TRANSFORM([grub-mklayout])
grub_TRANSFORM([grub-mkpasswd-pbkdf2])
grub_TRANSFORM([grub-mkrelpath])
grub_TRANSFORM([grub-mkrescue])
grub_TRANSFORM([grub-probe])
grub_TRANSFORM([grub-reboot])
grub_TRANSFORM([grub-script-check])
grub_TRANSFORM([grub-set-default])
grub_TRANSFORM([grub-sparc64-setup])
grub_TRANSFORM([grub-render-label])
grub_TRANSFORM([grub-file])

# Optimization flag.  Allow user to override.
if test "x$TARGET_CFLAGS" = x; then
  TARGET_CFLAGS=-Os
fi

# Enable support for "restrict" keyword and other
# features from gnu99 C language standard.
BUILD_CFLAGS="-std=gnu99 $BUILD_CFLAGS"
HOST_CFLAGS="-std=gnu99 $HOST_CFLAGS"
TARGET_CFLAGS="-std=gnu99 $TARGET_CFLAGS"

# Default HOST_CPPFLAGS
HOST_CPPFLAGS="$HOST_CPPFLAGS -Wall -W"
HOST_CPPFLAGS="$HOST_CPPFLAGS -DGRUB_UTIL=1"

TARGET_CPPFLAGS="$TARGET_CPPFLAGS -Wall -W"

case "$target_cpu" in
  i[[3456]]86)	target_cpu=i386 ;;
  amd64)	target_cpu=x86_64 ;;
  sparc)	target_cpu=sparc64 ;;
  mipsel|mips64el)
                target_cpu=mipsel
		machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_CPU_MIPSEL=1"
		;;
  mips|mips64)
                target_cpu=mips
		machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_CPU_MIPS=1"
		;;
  arm*)
		target_cpu=arm
		;;
  aarch64*)
		target_cpu=arm64
		;;
  riscv32*)
		target_cpu=riscv32
		;;
  riscv64*)
		target_cpu=riscv64
		;;
esac

# Specify the platform (such as firmware).
AC_ARG_WITH([platform],
            AS_HELP_STRING([--with-platform=PLATFORM],
                           [select the host platform [[guessed]]]))

# Guess the platform if not specified.
if test "x$with_platform" = x; then
  case "$target_cpu"-"$target_vendor" in
    i386-apple) platform=efi ;;
    i386-*) platform=pc ;;
    x86_64-apple) platform=efi ;;
    x86_64-*) platform=pc ;;
    powerpc-*) platform=ieee1275 ;;
    powerpc64-*) platform=ieee1275 ;;
    powerpc64le-*) platform=ieee1275 ;;
    sparc64-*) platform=ieee1275 ;;
    mipsel-*) platform=loongson ;;
    mips-*) platform=arc ;;
    ia64-*) platform=efi ;;
    arm-*) platform=uboot ;;
    arm64-*) platform=efi ;;
    riscv32-*) platform=efi ;;
    riscv64-*) platform=efi ;;
    *)
      AC_MSG_WARN([unsupported CPU: "$target_cpu" - only building utilities])
      platform=none
      ;;
  esac
else
  platform="$with_platform"
fi

case "$target_cpu"-"$platform" in
  x86_64-efi) ;;
  x86_64-emu) ;;
  x86_64-xen) ;;
  x86_64-none) ;;
  x86_64-*) target_cpu=i386 ;;
  powerpc64-ieee1275) target_cpu=powerpc ;;
  powerpc64le-ieee1275) target_cpu=powerpc ;;
esac

# Check if the platform is supported, make final adjustments.
case "$target_cpu"-"$platform" in
  i386-efi) ;;
  x86_64-efi) ;;
  i386-xen) ;;
  i386-xen_pvh) ;;
  x86_64-xen) ;;
  i386-pc) ;;
  i386-multiboot) ;;
  i386-coreboot) ;;
  i386-linuxbios) platform=coreboot ;;
  i386-ieee1275) ;;
  i386-qemu) ;;
  powerpc-ieee1275) ;;
  sparc64-ieee1275) ;;
  ia64-efi) ;;
  mips-qemu_mips) ;;
  mips-qemu-mips) platform=qemu_mips;;
  mips-arc) ;;
  mipsel-arc) ;;
  mipsel-qemu_mips) ;;
  mipsel-qemu-mips) platform=qemu_mips;;
  mipsel-yeeloong) platform=loongson ;;
  mipsel-fuloong) platform=loongson ;;
  mipsel-loongson) ;;
  arm-uboot) ;;
  arm-coreboot) ;;
  arm-efi) ;;
  arm64-efi) ;;
  riscv32-efi) ;;
  riscv64-efi) ;;
  *-emu) ;;
  *-none) ;;
  *) AC_MSG_ERROR([platform "$platform" is not supported for target CPU "$target_cpu"]) ;;
esac

if test x$platform != xemu ; then
   case "$target_cpu" in
	i386 | powerpc) target_m32=1 ;;
	x86_64 | sparc64) target_m64=1 ;;
   esac
fi

if test x"$target_cpu-$platform" = xsparc64-emu ; then
   target_m64=1
fi

case "$target_os" in
  windows* | mingw32*) target_os=cygwin ;;
esac

# This normalizes the names, and creates a new variable ("host_kernel")
# while at it, since the mapping is not always 1:1 (e.g. different OSes
# using the same kernel type).
case "$host_os" in
  gnu*)				host_kernel=hurd ;;
  linux*)			host_kernel=linux ;;
  freebsd* | kfreebsd*-gnu)	host_kernel=kfreebsd ;;
  netbsd*)			host_kernel=netbsd ;;
  solaris*)			host_kernel=illumos ;;
  darwin*)			host_kernel=xnu ;;
  cygwin | windows* | mingw32*)	host_kernel=windows ;;
esac

case "$host_os" in
  cygwin) have_exec=y ;;
  windows* | mingw32*) have_exec=n ;;
  aros*) have_exec=n ;;
  *) have_exec=y;;
esac

case "$platform" in
  coreboot)	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_COREBOOT=1" ;;
  multiboot)	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_MULTIBOOT=1" ;;
  efi)		machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_EFI=1" ;;
  xen)		machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_XEN=1" ;;
  xen_pvh)	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_XEN_PVH=1" ;;
  ieee1275)	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_IEEE1275=1" ;;
  uboot)	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_UBOOT=1" ;;
  qemu)		machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_QEMU=1" ;;
  pc)		machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_PCBIOS=1" ;;
  emu)		machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_EMU=1" ;;
  loongson)	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_MIPS_LOONGSON=1" ;;
  qemu_mips)	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_MIPS_QEMU_MIPS=1" ;;
  arc)	machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE_ARC=1" ;;
esac
if test x${target_cpu} = xmipsel ; then
   machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE=`echo mips_$platform | sed y,abcdefghijklmnopqrstuvwxyz,ABCDEFGHIJKLMNOPQRSTUVWXYZ,`"
else
   machine_CPPFLAGS="$machine_CPPFLAGS -DGRUB_MACHINE=`echo ${target_cpu}_$platform | sed y,abcdefghijklmnopqrstuvwxyz,ABCDEFGHIJKLMNOPQRSTUVWXYZ,`"
fi

case "${target_cpu}-$platform" in
     mips-arc)
        TARGET_LINK_ADDR=0x88200000
        TARGET_DECOMPRESSOR_LINK_ADDR=0x88100000
	;;
     mipsel-arc)
        TARGET_LINK_ADDR=0x80700000
	TARGET_DECOMPRESSOR_LINK_ADDR=0x80600000
	;;
     mips*-qemu_mips | mips*-loongson)
        TARGET_DECOMPRESSOR_LINK_ADDR=0x80100000
	;;
esac

AC_SUBST(TARGET_LINK_ADDR)
AC_SUBST(TARGET_DECOMPRESSOR_LINK_ADDR)

TARGET_CPPFLAGS="$TARGET_CPPFLAGS $machine_CPPFLAGS"

AC_SUBST(host_cpu)
AC_SUBST(host_os)
AC_SUBST(host_kernel)

AC_SUBST(target_cpu)
AC_SUBST(platform)

# Define default variables

have_with_bootdir=n
AC_ARG_WITH([bootdir],
            AS_HELP_STRING([--with-bootdir=DIR],
                           [set the name of /boot directory [[guessed]]]),
			   [have_with_bootdir=y],
			   [have_with_bootdir=n])
if test x$have_with_bootdir = xy; then
   bootdirname="$with_bootdir"
else
   case "$host_os" in
     netbsd* | openbsd*)
        # Because /boot is used for the boot block in NetBSD and OpenBSD,
           bootdirname=''      ;;
     *)    bootdirname='boot'  ;;
   esac
fi

AC_SUBST(bootdirname)
AC_DEFINE_UNQUOTED(GRUB_BOOT_DIR_NAME, "$bootdirname",
    [Default boot directory name])

AC_ARG_WITH([grubdir],
            AS_HELP_STRING([--with-grubdir=DIR],
                           [set the name of grub directory [[guessed]]]),
			   [grubdirname="$with_grubdir"],
			   [grubdirname="$PACKAGE"])

AC_SUBST(grubdirname)
AC_DEFINE_UNQUOTED(GRUB_DIR_NAME, "$grubdirname",
    [Default grub directory name])

#
# Checks for build programs.
#

# Although cmp is listed in the GNU Coding Standards as a command which
# can used directly, OpenBSD lacks cmp in the default installation.
AC_CHECK_PROGS([CMP], [cmp])
if test "x$CMP" = x; then
  AC_MSG_ERROR([cmp is not found])
fi

AC_CHECK_PROGS([YACC], [bison])
if test "x$YACC" = x; then
  AC_MSG_ERROR([bison is not found])
fi

AC_PROG_RANLIB
AC_PROG_INSTALL
AC_PROG_AWK
AC_PROG_LEX
AC_PROG_YACC
AC_PROG_MAKE_SET
AC_PROG_MKDIR_P
AC_PROG_LN_S

if test "x$LEX" = "x:"; then
  AC_MSG_ERROR([flex is not found])
else
  version=`$LEX --version | $AWK '{ split($2,x,"."); print x[[1]]*10000+x[[2]]*100+x[[3]]; }'`
  if test -n "$version" -a "$version" -ge 20535; then
    :
  else
    AC_MSG_ERROR([flex is too old. GRUB requires 2.5.35 or above])
  fi
fi

# These are not a "must".
AC_PATH_PROGS(MAKEINFO, makeinfo true)

#
# Checks for host programs.
#

AC_PROG_CC
gl_EARLY
AC_PROG_CXX
AM_PROG_CC_C_O
AM_PROG_AS
AM_PATH_PYTHON([2.6])

# Must be GCC.
test "x$GCC" = xyes || AC_MSG_ERROR([GCC is required])

AC_CHECK_PROG(HAVE_CXX, $CXX, yes, no)

AC_GNU_SOURCE
AM_GNU_GETTEXT([external])
AM_GNU_GETTEXT_VERSION([0.18.3])
AC_SYS_LARGEFILE

# Identify characteristics of the host architecture.
unset ac_cv_c_bigendian

if test x"$target_cpu-$platform" = xsparc64-emu ; then
  CFLAGS="$CFLAGS -m64"
  HOST_CFLAGS="$HOST_CFLAGS -m64"
fi

CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=64"
HOST_CPPFLAGS="$HOST_CPPFLAGS -D_FILE_OFFSET_BITS=64"

AC_C_BIGENDIAN
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(long)

case "$host_os" in
  cygwin | windows* | mingw32*)
     HOST_CPPFLAGS="$HOST_CPPFLAGS -DUNICODE=1 -D_WIN32_WINNT=0x0500"
     CPPFLAGS="$CPPFLAGS -DUNICODE=1 -D_WIN32_WINNT=0x0500"
     AC_CHECK_SIZEOF(TCHAR,,[#include <windows.h>])
   ;;
esac

case "$host_os" in
  cygwin | windows* | mingw32* | aros*)
     ;;
  *)
     AC_CHECK_SIZEOF(off_t)
     if test x"$ac_cv_sizeof_off_t" != x8 ; then
       AC_CHECK_SIZEOF(off64_t)
       test x"$ac_cv_sizeof_off64_t" = x8 || AC_MSG_ERROR([Large file support is required])
     fi;;
esac

if test x$USE_NLS = xno; then
  HOST_CFLAGS="$HOST_CFLAGS -fno-builtin-gettext"
fi

if test "x$cross_compiling" = xyes; then
  AC_MSG_WARN([cannot generate manual pages while cross compiling])
else
  AC_PATH_PROG(HELP2MAN, help2man)
fi

# Check for functions and headers.
AC_CHECK_FUNCS(posix_memalign memalign getextmntent)
AC_CHECK_HEADERS(sys/param.h sys/mount.h sys/mnttab.h limits.h)

# glibc 2.25 still includes sys/sysmacros.h in sys/types.h but emits deprecation
# warning which causes compilation failure later with -Werror. So use -Werror here
# as well to force proper sys/sysmacros.h detection.
SAVED_CFLAGS="$CFLAGS"
CFLAGS="$HOST_CFLAGS -Werror"
AC_HEADER_MAJOR
CFLAGS="$SAVED_CFLAGS"

AC_CHECK_MEMBERS([struct statfs.f_fstypename],,,[$ac_includes_default
#include <sys/param.h>
#include <sys/mount.h>])

AC_CHECK_MEMBERS([struct statfs.f_mntfromname],,,[$ac_includes_default
#include <sys/param.h>
#include <sys/mount.h>])

# For opendisk() and getrawpartition() on NetBSD.
# Used in util/deviceiter.c and in util/hostdisk.c.
AC_CHECK_HEADER([util.h], [
  AC_CHECK_LIB([util], [opendisk], [
    LIBUTIL="-lutil"
    AC_DEFINE(HAVE_OPENDISK, 1, [Define if opendisk() in -lutil can be used])
  ])
  AC_CHECK_LIB([util], [getrawpartition], [
    LIBUTIL="-lutil"
    AC_DEFINE(HAVE_GETRAWPARTITION, 1, [Define if getrawpartition() in -lutil can be used])
  ])
])
AC_SUBST([LIBUTIL])

AC_CACHE_CHECK([whether -Wtrampolines work], [grub_cv_host_cc_wtrampolines], [
  SAVED_CFLAGS="$CFLAGS"
  CFLAGS="$HOST_CFLAGS -Wtrampolines -Werror"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdarg.h>
int va_arg_func (int fixed, va_list args);]], [[]])],
      [grub_cv_host_cc_wtrampolines=yes],
      [grub_cv_host_cc_wtrampolines=no])
  CFLAGS="$SAVED_CFLAGS"
])

if test x"$grub_host_cv_cc_wtrampolines" = xyes ; then
  HOST_CFLAGS="$HOST_CFLAGS -Wtrampolines"
fi

#
# Check for host and build compilers.
#
HOST_CC=$CC
AC_CHECK_PROGS(BUILD_CC, [gcc egcs cc])
test -z "$BUILD_CC" && AC_MSG_ERROR([none of gcc, egcs and cc is found. set BUILD_CC manually.])
BUILD_CPP="$BUILD_CC -E"

case "$build_os" in
  haiku*)				BUILD_LIBM= ;;
  *) 					BUILD_LIBM=-lm ;;
esac

dnl FIXME proper test seems to require too deep dive into Autoconf internals.
dnl For now just list known platforms that we support.

case "$build_os" in
  cygwin*|mingw32*|mingw64*)		BUILD_EXEEXT=.exe ;;
  *)					BUILD_EXEEXT= ;;
esac
AC_SUBST(BUILD_EXEEXT)

# In some build environments like termux /bin/sh is not a valid
# shebang. Use $SHELL instead if it's executable and /bin/sh isn't
BUILD_SHEBANG=/bin/sh
for she in /bin/sh "$SHELL"; do
  if test -x "$she" ; then
    BUILD_SHEBANG="$she"
  fi
done
AC_SUBST(BUILD_SHEBANG)

# For gnulib.
gl_INIT

WARN_FLAGS="-Wall -W -Wshadow -Wpointer-arith -Wundef -Wchar-subscripts -Wcomment -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wfloat-equal -Wformat-extra-args -Wformat-security -Wformat-y2k -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Wmain -Wmissing-braces -Wmissing-format-attribute -Wmultichar -Wparentheses -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wswitch -Wtrigraphs -Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-value  -Wunused-variable -Wwrite-strings -Wnested-externs -Wstrict-prototypes"
EXTRA_WARN_FLAGS="-Wextra -Wattributes -Wendif-labels -Winit-self -Wint-to-pointer-cast -Winvalid-pch -Wmissing-field-initializers -Wnonnull -Woverflow -Wvla -Wpointer-to-int-cast -Wstrict-aliasing -Wvariadic-macros -Wvolatile-register-var -Wpointer-sign -Wmissing-include-dirs -Wmissing-prototypes -Wmissing-declarations -Wformat=2"

HOST_CFLAGS="$HOST_CFLAGS $WARN_FLAGS -Wcast-align"

AC_CACHE_CHECK([which extra warnings work], [grub_cv_cc_w_extra_flags], [
  SAVED_CFLAGS="$CFLAGS"
  grub_cv_cc_w_extra_flags=
  for x in $EXTRA_WARN_FLAGS; do
      CFLAGS="$HOST_CFLAGS $x -Werror"
      AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])], [flag=1], [flag=0])
      if test x$flag = x1 ; then
         grub_cv_cc_w_extra_flags="$grub_cv_cc_w_extra_flags $x"
      fi
  done
  CFLAGS="$SAVED_CFLAGS"
])

HOST_CFLAGS="$HOST_CFLAGS $grub_cv_cc_w_extra_flags"

#
# Check for target programs.
#

# Find tools for the target.
if test "x$target_alias" != x && test "x$host_alias" != "x$target_alias"; then
  tmp_ac_tool_prefix="$ac_tool_prefix"
  ac_tool_prefix=$target_alias-

  AC_CHECK_TOOLS(TARGET_CC, [gcc egcs cc],
                 [AC_MSG_ERROR([none of gcc, egcs and cc is found. set TARGET_CC manually.])])
  AC_CHECK_TOOL(TARGET_OBJCOPY, objcopy)
  AC_CHECK_TOOL(TARGET_STRIP, strip)
  AC_CHECK_TOOL(TARGET_NM, nm)
  AC_CHECK_TOOL(TARGET_RANLIB, ranlib)

  ac_tool_prefix="$tmp_ac_tool_prefix"
else
  if test "x$TARGET_CC" = x; then
    TARGET_CC=$CC
  fi
  AC_CHECK_TOOL(TARGET_OBJCOPY, objcopy)
  AC_CHECK_TOOL(TARGET_STRIP, strip)
  AC_CHECK_TOOL(TARGET_NM, nm)
  AC_CHECK_TOOL(TARGET_RANLIB, ranlib)
fi

AC_SUBST(HOST_CC)
AC_SUBST(BUILD_CC)
AC_SUBST(BUILD_CFLAGS)
AC_SUBST(BUILD_CPPFLAGS)
AC_SUBST(BUILD_LDFLAGS)
AC_SUBST(TARGET_CC)
AC_SUBST(TARGET_NM)
AC_SUBST(TARGET_RANLIB)
AC_SUBST(TARGET_STRIP)
AC_SUBST(TARGET_OBJCOPY)

# Test the C compiler for the target environment.
tmp_CC="$CC"
tmp_CFLAGS="$CFLAGS"
tmp_LDFLAGS="$LDFLAGS"
tmp_CPPFLAGS="$CPPFLAGS"
tmp_LIBS="$LIBS"
CC="$TARGET_CC"
CFLAGS="$TARGET_CFLAGS"
CPPFLAGS="$TARGET_CPPFLAGS"
LDFLAGS="$TARGET_LDFLAGS"
LIBS=""

if test "x$target_m32" = x1; then
  # Force 32-bit mode.
  TARGET_CFLAGS="$TARGET_CFLAGS -m32"
  TARGET_CCASFLAGS="$TARGET_CCASFLAGS -m32"
  TARGET_CPPFLAGS="$TARGET_CPPFLAGS -m32"
  TARGET_LDFLAGS="$TARGET_LDFLAGS -m32"
  TARGET_MODULE_FORMAT="elf32"
fi

if test "x$target_m64" = x1; then
  # Force 64-bit mode.
  TARGET_CFLAGS="$TARGET_CFLAGS -m64"
  TARGET_CCASFLAGS="$TARGET_CCASFLAGS -m64"
  TARGET_CPPFLAGS="$TARGET_CPPFLAGS -m64"
  TARGET_LDFLAGS="$TARGET_LDFLAGS -m64"
  TARGET_MODULE_FORMAT="elf64"
fi

# debug flags.
TARGET_CFLAGS="$TARGET_CFLAGS $WARN_FLAGS -g -Wredundant-decls -Wmissing-prototypes -Wmissing-declarations"
TARGET_CCASFLAGS="$TARGET_CCASFLAGS -g"

if test "x$target_cpu" != xi386 && test "x$target_cpu" != xx86_64; then
TARGET_CFLAGS="$TARGET_CFLAGS -Wcast-align"
fi

TARGET_CC_VERSION="$(LC_ALL=C $TARGET_CC --version | head -n1)"

AC_CACHE_CHECK([which extra warnings work], [grub_cv_target_cc_w_extra_flags], [
  LDFLAGS="$TARGET_LDFLAGS -nostdlib -static"

  grub_cv_target_cc_w_extra_flags=
  for x in $EXTRA_WARN_FLAGS; do
      CFLAGS="$TARGET_CFLAGS $x -Werror"
      AC_LINK_IFELSE([AC_LANG_PROGRAM([[
asm (".globl start; start:");
void __main (void);
void __main (void) {}
int main (void);
]], [[]])], [flag=1], [flag=0])
      if test x$flag = x1 ; then
         grub_cv_target_cc_w_extra_flags="$grub_cv_target_cc_w_extra_flags $x"
      fi
  done
])

TARGET_CFLAGS="$TARGET_CFLAGS $grub_cv_target_cc_w_extra_flags"

AC_CACHE_CHECK([if compiling with clang], [grub_cv_cc_target_clang],
[
CFLAGS="$TARGET_CFLAGS"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([], [[
#ifdef __clang__
#error "is clang"
#endif
]])],
[grub_cv_cc_target_clang=no], [grub_cv_cc_target_clang=yes])])

if test x$target_cpu = xpowerpc -o x$target_cpu = xmips; then
  AC_CACHE_CHECK([for options to get big-endian compilation], grub_cv_target_cc_big_endian, [
    grub_cv_target_cc_big_endian=no
    for cand in "-target $target_cpu -Wl,-EB" "-target $target_cpu" \
		"-target $target_cpu-linux-gnu -Wl,-EB" "-target $target_cpu-linux-gnu" \
		"-EB" "-mbig-endian"; do
      if test x"$grub_cv_target_cc_big_endian" != xno ; then
        break
      fi
      CFLAGS="$TARGET_CFLAGS $cand -Werror"
      AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && (__ORDER_BIG_ENDIAN__ != __BYTE_ORDER__)
#error still little endian
#endif
asm (".globl start; start:");
asm (".globl _start; _start:");
asm (".globl __start; __start:");
void __main (void);
void __main (void) {}
int main (void);
]], [[]])],
		        [grub_cv_target_cc_big_endian="$cand"], [])
    done
  ])

  if test x"$grub_cv_target_cc_big_endian" = xno ; then
    AC_MSG_ERROR([could not force big-endian])
  fi

  skip_linkflags="$(echo "$grub_cv_target_cc_big_endian"|sed 's@-Wl,-EB@@')"

  TARGET_CFLAGS="$TARGET_CFLAGS $skip_linkflags"
  TARGET_CPPFLAGS="$TARGET_CPPFLAGS $skip_linkflags"
  TARGET_CCASFLAGS="$TARGET_CCASFLAGS $skip_linkflags"
  TARGET_LDFLAGS="$TARGET_LDFLAGS $grub_cv_target_cc_big_endian"
elif test x$target_cpu = xmipsel; then
  AC_CACHE_CHECK([for options to get little-endian compilation], grub_cv_target_cc_little_endian, [
    grub_cv_target_cc_little_endian=no
    for cand in "-target $target_cpu -Wl,-EL" "-target $target_cpu" \
		"-target $target_cpu-linux-gnu -Wl,-EL" "-target $target_cpu-linux-gnu" \
		"-EL"; do
      if test x"$grub_cv_target_cc_little_endian" != xno ; then
        break
      fi
      CFLAGS="$TARGET_CFLAGS $cand -Werror"
      AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && (__ORDER_BIG_ENDIAN__ == __BYTE_ORDER__)
#error still big endian
#endif
asm (".globl start; start:");
asm (".globl _start; _start:");
asm (".globl __start; __start:");
void __main (void);
void __main (void) {}
int main (void);
]], [[]])],
		        [grub_cv_target_cc_little_endian="$cand"], [])
    done
  ])

  if test x"$grub_cv_target_cc_little_endian" = xno ; then
    AC_MSG_ERROR([could not force little-endian])
  fi

  skip_linkflags="$(echo "$grub_cv_target_cc_little_endian"|sed 's@-Wl,-EL@@')"

  TARGET_CFLAGS="$TARGET_CFLAGS $skip_linkflags"
  TARGET_CPPFLAGS="$TARGET_CPPFLAGS $skip_linkflags"
  TARGET_CCASFLAGS="$TARGET_CCASFLAGS $skip_linkflags"
  TARGET_LDFLAGS="$TARGET_LDFLAGS $grub_cv_target_cc_little_endian"
fi

# GRUB code is N32-compliant but it's experimental and we would prefer to
# avoid having too much variety when it doesn't result in any real improvement.
# Moreover N64 isn't supported.
if test "x$target_cpu" = xmips || test "x$target_cpu" = xmipsel ; then
  AC_CACHE_CHECK([for options to force MIPS o32 ABI], grub_cv_target_cc_mips_o32_abi, [
    grub_cv_target_cc_mips_o32_abi=no
    for arg in "" "-mabi=32" "-target $target_cpu -mabi=32" ; do
      if test x"$grub_cv_target_cc_mips_o32_abi" != xno ; then
        break
      fi
      CFLAGS="$TARGET_CFLAGS $arg -Werror"
      AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#if !defined(_ABIO32) || !defined(_MIPS_SIM) || (_MIPS_SIM != _ABIO32)
#error not o32 ABI
#endif
asm (".globl start; start:");
asm (".globl _start; _start:");
asm (".globl __start; __start:");
void __main (void);
void __main (void) {}
int main (void);
]], [[]])],
		        [grub_cv_target_cc_mips_o32_abi="$arg"], [])
    done
  ])

  if test x"$grub_cv_target_cc_mips_o32_abi" = xno ; then
    AC_MSG_ERROR([could not force MIPS o32 ABI])
  fi

  TARGET_CFLAGS="$TARGET_CFLAGS $grub_cv_target_cc_mips_o32_abi"
  TARGET_CCASFLAGS="$TARGET_CCASFLAGS $grub_cv_target_cc_mips_o32_abi"
fi

AC_CACHE_CHECK([for options to compile assembly], [grub_cv_cc_target_asm_compile], [
test_program=
case "x$target_cpu-$platform" in
     xmips-* | xmipsel-*)
        test_program=mips
	;;
     xi386-pc)
       test_program=i386-pc
	;;
     xi386-* | xx86_64-*)
       test_program=i386
	;;
     xpowerpc-* | xsparc64-* | xarm-*)
        test_program=$target_cpu
	;;
esac
if test x"$test_program" = x ; then
  grub_cv_cc_target_asm_compile=
else
  found=no
  for arg in "" "-no-integrated-as"; do
    cmdline="$TARGET_CC -c -o /dev/null $TARGET_CCASFLAGS $arg $TARGET_CPPFLAGS $srcdir/asm-tests/$test_program.S"
    echo "Running $cmdline" >&AS_MESSAGE_LOG_FD
    if $cmdline >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
      grub_cv_cc_target_asm_compile="$arg"
      found=yes
      break
    fi
  done
  if test x"$found" = xno ; then
    AC_MSG_ERROR([could not compile assembly])
  fi
fi
])

TARGET_CCASFLAGS="$TARGET_CCASFLAGS $grub_cv_cc_target_asm_compile"

if test "x$target_cpu" = xi386 && test "x$platform" != xemu; then
  TARGET_CFLAGS="$TARGET_CFLAGS -march=i386"
fi

if test "x$grub_cv_cc_target_clang" = xno && test "x$target_cpu" = xi386 && test "x$platform" != xemu && test "x$platform" != xefi; then
   TARGET_CFLAGS="$TARGET_CFLAGS -mrtd -mregparm=3"
fi

# on mips redirect cache flushing function to non-existant one.
if test "x$target_cpu" = xmips || test "x$target_cpu" = xmipsel ; then
  AC_CACHE_CHECK([whether -mflush-func=grub_red_herring works], [grub_cv_cc_mflush_func], [
    CFLAGS="$TARGET_CFLAGS -mflush-func=grub_red_herring -Werror"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
        [grub_cv_cc_mflush_func=yes],
	[grub_cv_cc_mflush_func=no])
  ])

  if test "x$grub_cv_cc_mflush_func" = xyes; then
    TARGET_CFLAGS="$TARGET_CFLAGS -mflush-func=grub_red_herring"
  fi
fi


# Force no alignment to save space on i386.
if test "x$target_cpu" = xi386; then
  AC_CACHE_CHECK([whether -falign-loops works], [grub_cv_cc_falign_loop], [
    CFLAGS="$TARGET_CFLAGS -falign-loops=1 -Werror"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
        [grub_cv_cc_falign_loop=yes],
	[grub_cv_cc_falign_loop=no])
  ])

  AC_CACHE_CHECK([whether -malign-loops works], [grub_cv_cc_malign_loop], [
    CFLAGS="$TARGET_CFLAGS -malign-loops=1 -Werror"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
        [grub_cv_cc_malign_loop=yes],
	[grub_cv_cc_malign_loop=no])
  ])

  if test "x$grub_cv_cc_falign_loop" = xyes; then
    TARGET_CFLAGS="$TARGET_CFLAGS -falign-jumps=1 -falign-loops=1 -falign-functions=1"
  elif test "x$grub_cv_cc_malign_loop" = xyes; then
    TARGET_CFLAGS="$TARGET_CFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1"
  fi
fi

AC_CACHE_CHECK([whether -freg-struct-return works], [grub_cv_cc_freg_struct_return], [
    CFLAGS="$TARGET_CFLAGS -freg-struct-return -Werror"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
        [grub_cv_cc_freg_struct_return=yes],
	[grub_cv_cc_freg_struct_return=no])
])

if test "x$grub_cv_cc_freg_struct_return" = xyes; then
    TARGET_CFLAGS="$TARGET_CFLAGS -freg-struct-return"
fi

if ( test "x$target_cpu" = xi386 || test "x$target_cpu" = xx86_64 ) && test "x$platform" != xemu; then
  # Some toolchains enable these features by default, but they need
  # registers that aren't set up properly in GRUB.
  TARGET_CFLAGS="$TARGET_CFLAGS -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow"
fi

# GRUB doesn't use float or doubles at all. Yet some toolchains may decide
# that floats are a good fit to run instead of what's written in the code.
# Given that floating point unit is disabled (if present to begin with)
# when GRUB is running which may result in various hard crashes.
if test x"$platform" != xemu ; then
  AC_CACHE_CHECK([for options to get soft-float], grub_cv_target_cc_soft_float, [
    grub_cv_target_cc_soft_float=no
    if test "x$target_cpu" = xarm64; then
       CFLAGS="$TARGET_CFLAGS -mgeneral-regs-only -Werror"
       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		         [grub_cv_target_cc_soft_float="-mgeneral-regs-only"], [])
    fi
    if test "x$target_cpu" = xriscv32; then
       CFLAGS="$TARGET_CFLAGS -march=rv32imac -mabi=ilp32 -Werror"
       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		         [grub_cv_target_cc_soft_float="-march=rv32imac -mabi=ilp32"], [])
    fi
    if test "x$target_cpu" = xriscv64; then
       CFLAGS="$TARGET_CFLAGS -march=rv64imac -mabi=lp64 -Werror"
       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		         [grub_cv_target_cc_soft_float="-march=rv64imac -mabi=lp64"], [])
    fi
    if test "x$target_cpu" = xia64; then
       CFLAGS="$TARGET_CFLAGS -mno-inline-float-divide -mno-inline-sqrt -Werror"
       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		         [grub_cv_target_cc_soft_float="-mno-inline-float-divide -mno-inline-sqrt"], [])
    fi
    if test "x$target_cpu" = xsh4; then
       CFLAGS="$TARGET_CFLAGS -m4-nofpu -Werror"
       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		         [grub_cv_target_cc_soft_float="-m4-nofpu"], [])
    fi
    for cand in "-msoft-float -Xclang -msoft-float -Xclang -no-implicit-float" \
		"-Xclang -msoft-float -Xclang -no-implicit-float" \
		"-Xclang -msoft-float" "-msoft-float"; do
      if test x"$grub_cv_target_cc_soft_float" != xno ; then
        break
      fi
      CFLAGS="$TARGET_CFLAGS $cand -Werror"
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		        [grub_cv_target_cc_soft_float="$cand"], [])
    done
  ])

  if test x"$grub_cv_target_cc_soft_float" = xno ; then
    AC_MSG_ERROR([could not force soft-float])
  fi

  case x"$grub_cv_target_cc_soft_float" in
    x*"-Xclang"*)
      # A trick so that clang doesn't see it on link stаge
      TARGET_CPPFLAGS="$TARGET_CPPFLAGS $grub_cv_target_cc_soft_float"
      ;;
    *)
      TARGET_CFLAGS="$TARGET_CFLAGS $grub_cv_target_cc_soft_float"
      ;;
  esac
  TARGET_CCASFLAGS="$TARGET_CCASFLAGS $grub_cv_target_cc_soft_float"

fi

if test x"$target_cpu" = xsparc64 ; then
  AC_CACHE_CHECK([for options to reserve application registers], grub_cv_target_cc_mno_app_regs, [
    grub_cv_target_cc_mno_app_regs=no
    for cand in "-mllvm -sparc-reserve-app-registers" \
		"-mno-app-regs"; do
      if test x"$grub_cv_target_cc_mno_app_regs" != xno ; then
        break
      fi
      CFLAGS="$TARGET_CFLAGS $cand -Werror"
      CPPFLAGS="$TARGET_CPPFLAGS"
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		        [grub_cv_target_cc_mno_app_regs="$cand"], [])
    done
  ])

  if test x"$grub_cv_target_cc_mno_app_regs" = xno ; then
    AC_MSG_ERROR([could not reserve application registers])
  fi
  if test x"$grub_cv_target_cc_mno_app_regs" = x"-mllvm -sparc-reserve-app-registers" ; then
    # A trick so that clang doesn't see it on link stаge
    TARGET_CPPFLAGS="$TARGET_CPPFLAGS $grub_cv_target_cc_mno_app_regs"
  else
    TARGET_CFLAGS="$TARGET_CFLAGS $grub_cv_target_cc_mno_app_regs"
  fi

  AC_CACHE_CHECK([for no-relax options], grub_cv_target_cc_mno_relax, [
    grub_cv_target_cc_mno_relax=no
    for cand in "-mno-relax" "-Wl,--no-relax"; do
      if test x"$grub_cv_target_cc_mno_relax" != xno ; then
        break
      fi
      LDFLAGS="$TARGET_LDFLAGS $cand -nostdlib -static"
      CFLAGS="$TARGET_CFLAGS -Werror"
      AC_LINK_IFELSE([AC_LANG_PROGRAM([[
	    asm (".globl start; start:");
	    void __main (void);
	    void __main (void) {}
	    int main (void);
	    ]], [[]])], [grub_cv_target_cc_mno_relax="$cand"], [])
    done
  ])
  LDFLAGS="$TARGET_LDFLAGS"
  CFLAGS="$TARGET_CFLAGS"

  if test x"$grub_cv_target_cc_mno_relax" = xno ; then
    AC_MSG_ERROR([could not find no-relax options])
  fi
  TARGET_LDFLAGS="$TARGET_LDFLAGS $grub_cv_target_cc_mno_relax"
fi

# By default, GCC 4.4 generates .eh_frame sections containing unwind
# information in some cases where it previously did not. GRUB doesn't need
# these and they just use up vital space. Restore the old compiler
# behaviour.
AC_CACHE_CHECK([whether -fno-dwarf2-cfi-asm works], [grub_cv_cc_fno_dwarf2_cfi_asm], [
  CFLAGS="$TARGET_CFLAGS -fno-dwarf2-cfi-asm"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
      [grub_cv_cc_fno_dwarf2_cfi_asm=yes],
      [grub_cv_cc_fno_dwarf2_cfi_asm=no])
])

if test "x$grub_cv_cc_fno_dwarf2_cfi_asm" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -fno-dwarf2-cfi-asm"
fi

if test x"$target_os" = xcygwin; then
  AC_CACHE_CHECK([whether option -fno-reorder-functions works], grub_cv_cc_no_reorder_functions, [
    CFLAGS="$TARGET_CFLAGS -fno-reorder-functions"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		      [grub_cv_cc_no_reorder_functions=yes],
		      [grub_cv_cc_no_reorder_functions=no])
  ])
fi

if test x"$target_os" = xcygwin && test "x$grub_cv_cc_no_reorder_functions" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -fno-reorder-functions"
fi

AC_CACHE_CHECK([whether -mno-stack-arg-probe works], [grub_cv_cc_mno_stack_arg_probe], [
  CFLAGS="$TARGET_CFLAGS -mno-stack-arg-probe"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
      [grub_cv_cc_mno_stack_arg_probe=yes],
      [grub_cv_cc_mno_stack_arg_probe=no])
])

if test "x$grub_cv_cc_mno_stack_arg_probe" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -mno-stack-arg-probe"
fi


# By default, GCC 4.6 generates .eh_frame sections containing unwind
# information in some cases where it previously did not. GRUB doesn't need
# these and they just use up vital space. Restore the old compiler
# behaviour.
AC_CACHE_CHECK([whether -fno-asynchronous-unwind-tables works], [grub_cv_cc_fno_asynchronous_unwind_tables], [
  CFLAGS="$TARGET_CFLAGS -fno-asynchronous-unwind-tables"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
      [grub_cv_cc_fno_asynchronous_unwind_tables=yes],
      [grub_cv_cc_fno_asynchronous_unwind_tables=no])
])

if test "x$grub_cv_cc_fno_asynchronous_unwind_tables" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -fno-asynchronous-unwind-tables"
fi

AC_CACHE_CHECK([whether -fno-unwind-tables works], [grub_cv_cc_fno_unwind_tables], [
  CFLAGS="$TARGET_CFLAGS -fno-unwind-tables"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
      [grub_cv_cc_fno_unwind_tables=yes],
      [grub_cv_cc_fno_unwind_tables=no])
])

if test "x$grub_cv_cc_fno_unwind_tables" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -fno-unwind-tables"
fi

# Do not generate .ident sections.
AC_CACHE_CHECK([whether -fno-ident works], [grub_cv_cc_fno_ident], [
  CFLAGS="$TARGET_CFLAGS -fno-ident"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
      [grub_cv_cc_fno_ident=yes],
      [grub_cv_cc_fno_ident=no])
])

if test "x$grub_cv_cc_fno_ident" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -fno-ident"
fi

CFLAGS="$TARGET_CFLAGS"


if test x"$platform" = xemu ; then
  TARGET_OBJ2ELF=
  grub_cv_target_cc_link_format=
  case "$host_os" in
    *darwin* | *mac*)
       grub_cv_target_cc_link_format="-arch,${target_cpu}"
       TARGET_LDFLAGS="$TARGET_LDFLAGS -Wl,$grub_cv_target_cc_link_format"
        ;;
    *windows* | *cygwin* | *mingw*)
      if test x${target_cpu} = xi386 ; then
        grub_cv_target_cc_link_format=-mi386pe
	TARGET_OBJ2ELF='./build-grub-pe2elf$(BUILD_EXEEXT)'
      fi
      if test x${target_cpu} = xx86_64 ; then
        grub_cv_target_cc_link_format=-mi386pep
	TARGET_OBJ2ELF='./build-grub-pep2elf$(BUILD_EXEEXT)'
      fi
      TARGET_LDFLAGS="$TARGET_LDFLAGS -Wl,$grub_cv_target_cc_link_format"
      ;;
  esac
elif test x"$target_cpu" = xi386 || test x"$target_cpu" = xx86_64; then
  AC_CACHE_CHECK([for target linking format], [grub_cv_target_cc_link_format], [
    grub_cv_target_cc_link_format=unknown
    for format in -melf_${target_cpu} -melf_${target_cpu}_fbsd -melf_${target_cpu}_obsd -melf_${target_cpu}_haiku -mi386pe -mi386pep -arch,${target_cpu}; do
      if test x${target_cpu} != xi386 && test x$format = x-mi386pe; then
        continue
      fi
      if test x${target_cpu} != xx86_64 && test x$format = x-mi386pep; then
        continue
      fi
      CFLAGS="$TARGET_CFLAGS"
      LDFLAGS="$TARGET_LDFLAGS -Wl,$format -nostdlib -static"
      AC_LINK_IFELSE([AC_LANG_PROGRAM([[
      asm (".globl start; start:");
      asm (".globl _start; _start:");
      asm (".globl __start; __start:");
      void __main (void);
      void __main (void) {}
      ]], [[]])], [flag=1], [flag=0])
      if test x"$flag" = x1; then
        grub_cv_target_cc_link_format="$format"
	break
      fi
    done])
  if test x"$grub_cv_target_cc_link_format" = xunknown; then
    AC_MSG_ERROR([no suitable link format found])
  fi
  TARGET_LDFLAGS="$TARGET_LDFLAGS -Wl,$grub_cv_target_cc_link_format"
  if test x"$grub_cv_target_cc_link_format" = x-mi386pe ; then
    TARGET_OBJ2ELF='./build-grub-pe2elf$(BUILD_EXEEXT)'
  fi
  if test x"$grub_cv_target_cc_link_format" = x-mi386pep ; then
    TARGET_OBJ2ELF='./build-grub-pep2elf$(BUILD_EXEEXT)'
  fi
fi

if test x$grub_cv_target_cc_link_format = x-arch,i386 || test x$grub_cv_target_cc_link_format = x-arch,x86_64; then
   TARGET_APPLE_LINKER=1
   AC_CHECK_PROG([TARGET_OBJCONV], [objconv], [objconv], [])
   if test "x$TARGET_OBJCONV" = x ; then
      AC_CHECK_PROG([TARGET_OBJCONV], [objconv], [./objconv], [], [.])
   fi
   if test "x$TARGET_OBJCONV" = x ; then
      AC_MSG_ERROR([objconv not found which is required when building with apple compiler])
   fi
   TARGET_IMG_LDSCRIPT=
   TARGET_IMG_CFLAGS="-static"
   TARGET_IMG_LDFLAGS='-nostdlib -static -Wl,-preload -Wl,-segalign,20'
   TARGET_IMG_LDFLAGS_AC='-nostdlib -static -Wl,-preload -Wl,-segalign,20'
   TARGET_IMG_BASE_LDOPT="-Wl,-image_base"
   TARGET_LDFLAGS_OLDMAGIC=""
elif test x$grub_cv_target_cc_link_format = x-mi386pe || test x$grub_cv_target_cc_link_format = x-mi386pep ; then
  TARGET_APPLE_LINKER=0
  TARGET_LDFLAGS_OLDMAGIC="-Wl,-N"
  TARGET_IMG_LDSCRIPT='$(top_srcdir)'"/${grub_coredir}/conf/i386-cygwin-img-ld.sc"
  TARGET_IMG_LDFLAGS="-Wl,-T${TARGET_IMG_LDSCRIPT}"
  TARGET_IMG_LDFLAGS_AC="-Wl,-T${srcdir}/${grub_coredir}/conf/i386-cygwin-img-ld.sc"
  TARGET_IMG_BASE_LDOPT="-Wl,-Ttext"
  TARGET_IMG_CFLAGS=
else
  TARGET_APPLE_LINKER=0
  TARGET_LDFLAGS_OLDMAGIC="-Wl,-N"
  TARGET_IMG_LDSCRIPT=
  TARGET_IMG_LDFLAGS='-Wl,-N'
  TARGET_IMG_LDFLAGS_AC='-Wl,-N'
  TARGET_IMG_BASE_LDOPT="-Wl,-Ttext"
  TARGET_IMG_CFLAGS=
fi

CFLAGS="$TARGET_CFLAGS"

AC_ARG_ENABLE([efiemu],
	      [AS_HELP_STRING([--enable-efiemu],
                             [build and install the efiemu runtimes (default=guessed)])])
if test x"$enable_efiemu" = xno ; then
  efiemu_excuse="explicitly disabled"
fi

if test x"$grub_cv_target_cc_link_format" = x-mi386pe || test x"$grub_cv_target_cc_link_format" = x-mi386pep ; then
  efiemu_excuse="not available on cygwin"
fi
if test x"$target_cpu" != xi386 ; then
  efiemu_excuse="only available on i386"
fi
if test x"$platform" = xefi ; then
  efiemu_excuse="not available on efi"
fi

if test x"$efiemu_excuse" = x ; then
  AC_CACHE_CHECK([whether options required for efiemu work], grub_cv_cc_efiemu, [
    CFLAGS="-m64 -nostdlib -O2 -mcmodel=large -mno-red-zone"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		      [grub_cv_cc_efiemu=yes],
		      [grub_cv_cc_efiemu=no])
  ])
  if test x$grub_cv_cc_efiemu = xno; then
     efiemu_excuse="cannot compile with -m64 -mcmodel=large -mno-red-zone -nostdlib"
  fi
fi
if test x"$efiemu_excuse" = x ; then
  AC_CACHE_CHECK([for efiemu64 linking format], [grub_cv_target_cc_efiemu64_link_format], [
    grub_cv_target_cc_efiemu64_link_format=unknown
    for format in -melf_x86_64 -melf_x86_64_fbsd -melf_x86_64_obsd -melf_x86_64_haiku -arch,x86_64; do
      CFLAGS="-m64 -nostdlib -O2 -mcmodel=large -mno-red-zone"
      LDFLAGS="-m64 -Wl,$format -nostdlib -static"
      AC_LINK_IFELSE([AC_LANG_PROGRAM([[
      asm (".globl start; start:");
      asm (".globl _start; _start:");
      asm (".globl __start; __start:");
      void __main (void);
      void __main (void) {}
      ]], [[]])], [flag=1], [flag=0])
      if test x"$flag" = x1; then
        grub_cv_target_cc_efiemu64_link_format="$format"
	break
      fi
    done])
  if test x"$grub_cv_target_cc_efiemu64_link_format" = xunknown; then
    efiemu_excuse="no suitable link format for efiemu64 found"
  else
    EFIEMU64_LINK_FORMAT="-Wl,$grub_cv_target_cc_efiemu64_link_format"
  fi
fi
if test x"$enable_efiemu" = xyes && test x"$efiemu_excuse" != x ; then
  AC_MSG_ERROR([efiemu runtime was explicitly requested but can't be compiled ($efiemu_excuse)])
fi
if test x"$efiemu_excuse" = x ; then
enable_efiemu=yes
else
enable_efiemu=no
fi
AC_SUBST([enable_efiemu])
AC_SUBST([EFIEMU64_LINK_FORMAT])

CFLAGS="$TARGET_CFLAGS"

AC_SUBST(TARGET_LDFLAGS_OLDMAGIC)


LDFLAGS="$TARGET_LDFLAGS"

if test "$target_cpu" = x86_64 || test "$target_cpu" = sparc64 || test "$target_cpu" = riscv64 ; then
  # Use large model to support 4G memory
  AC_CACHE_CHECK([whether option -mcmodel=large works], grub_cv_cc_mcmodel, [
    CFLAGS="$TARGET_CFLAGS -mcmodel=large"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		      [grub_cv_cc_mcmodel=yes],
		      [grub_cv_cc_mcmodel=no])
  ])
  if test "x$grub_cv_cc_mcmodel" = xyes; then
    TARGET_CFLAGS="$TARGET_CFLAGS -mcmodel=large"
  elif test "$target_cpu" = sparc64 || test "$target_cpu" = riscv64; then
    TARGET_CFLAGS="$TARGET_CFLAGS -mcmodel=medany"
  fi
fi

if test "$target_cpu"-"$platform" = x86_64-efi; then
  # EFI writes to stack below %rsp, we must not use the red zone
  AC_CACHE_CHECK([whether option -mno-red-zone works], grub_cv_cc_no_red_zone, [
    CFLAGS="$TARGET_CFLAGS -mno-red-zone"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		      [grub_cv_cc_no_red_zone=yes],
		      [grub_cv_cc_no_red_zone=no])
  ])
  if test "x$grub_cv_cc_no_red_zone" = xno; then
    AC_MSG_ERROR([-mno-red-zone not supported, upgrade your gcc])
  fi

  TARGET_CFLAGS="$TARGET_CFLAGS -mno-red-zone"
fi

if test "x$target_cpu" = xarm; then
  AC_CACHE_CHECK([for options to disable movt and movw], grub_cv_target_cc_mno_movt, [
    grub_cv_target_cc_mno_movt=no
    for cand in "-mno-movt" \
		"-mllvm -arm-use-movt=0" \
		"-mword-relocations"; do
      if test x"$grub_cv_target_cc_mno_movt" != xno ; then
        break
      fi
      CFLAGS="$TARGET_CFLAGS $cand -Werror"
      CPPFLAGS="$TARGET_CPPFLAGS"
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		        [grub_cv_target_cc_mno_movt="$cand"], [])
    done
  ])

  if test x"$grub_cv_target_cc_mno_movt" != xno ; then
    # A trick so that clang doesn't see it on link stage
    TARGET_CPPFLAGS="$TARGET_CPPFLAGS $grub_cv_target_cc_mno_movt"
  fi
  AC_CACHE_CHECK([whether option -mthumb-interwork works], grub_cv_cc_mthumb_interwork, [
    CFLAGS="$TARGET_CFLAGS -mthumb-interwork -Werror"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		      [grub_cv_cc_mthumb_interwork=yes],
		      [grub_cv_cc_mthumb_interwork=no])
  ])
  if test "x$grub_cv_cc_mthumb_interwork" = xyes; then
    TARGET_CFLAGS="$TARGET_CFLAGS -mthumb-interwork"
  # Clang defaults to thumb interworking
  elif test "x$grub_cv_cc_target_clang" = xno ; then
    AC_MSG_ERROR([your compiler doesn't support -mthumb-interwork])
  fi
fi

AC_CACHE_CHECK([whether option -Qn works], grub_cv_target_cc_qn, [
  CFLAGS="$TARGET_CFLAGS -Qn -Qunused-arguments -Werror"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
		    [grub_cv_target_cc_qn=yes],
		    [grub_cv_target_cc_qn=no])])
if test "x$grub_cv_target_cc_qn" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -Qn -Qunused-arguments"
fi

#
# Compiler features.
#

CFLAGS="$TARGET_CFLAGS"

# Position independent executable.
grub_CHECK_PIE
grub_CHECK_NO_PIE
grub_CHECK_NO_PIE_ONEWORD
grub_CHECK_LINK_PIE
[# Need that, because some distributions ship compilers that include
# `-fPIE' or '-fpie' and '-pie' in the default specs.
if [ x"$pie_possible" = xyes ]; then
  TARGET_CFLAGS="$TARGET_CFLAGS -fno-PIE -fno-pie"
  TARGET_CCASFLAGS="$TARGET_CCASFLAGS -fno-PIE -fno-pie"
fi

if [ x"$link_nopie_needed" = xyes ] || [ x"$pie_possible" = xyes ]; then
  if [ x"$nopie_possible" = xyes ]; then
    TARGET_LDFLAGS="$TARGET_LDFLAGS -no-pie"
  fi
  if [ x"$nopie_oneword_possible" = xyes ]; then
    TARGET_LDFLAGS="$TARGET_LDFLAGS -nopie"
  fi
fi]

CFLAGS="$TARGET_CFLAGS"
LDFLAGS="$TARGET_LDFLAGS"

# Position independent executable.
grub_CHECK_PIC
[# On most platforms we don't want PIC as it only makes relocations harder
# and code less efficient. On mips we want to have one got table per module
# and reload $gp in every function.
# GCC implements it using symbol __gnu_local_gp in non-PIC as well.
# However with clang we need PIC for this reloading to happen.
# With arm64 we need relocations that are in some way representable in
# PE as we need to support arm64-efi. Without -fPIC clang generates
# movk's which aren't representable.
# Since default varies across dictributions use either -fPIC or -fno-PIC
# explicitly.
if ( test x$target_cpu = xmips || test x$target_cpu = xmipsel || test x$target_cpu = xarm64 ) && test "x$grub_cv_cc_target_clang" = xyes ; then
   TARGET_CFLAGS="$TARGET_CFLAGS -fPIC"
elif [ x"$pic_possible" = xyes ]; then
   TARGET_CFLAGS="$TARGET_CFLAGS -fno-PIC"
fi]

CFLAGS="$TARGET_CFLAGS"

# Stack smashing protector.
grub_CHECK_STACK_PROTECTOR
AC_ARG_ENABLE([stack-protector],
	      AS_HELP_STRING([--enable-stack-protector],
			     [enable the stack protector]),
	      [],
	      [enable_stack_protector=no])
if test "x$enable_stack_protector" = xno; then
  if test "x$ssp_possible" = xyes; then
    # Need that, because some distributions ship compilers that include
    # `-fstack-protector' in the default specs.
    TARGET_CFLAGS="$TARGET_CFLAGS -fno-stack-protector"
  fi
elif test "x$platform" != xefi; then
  AC_MSG_ERROR([--enable-stack-protector is only supported on EFI platforms])
elif test "x$ssp_global_possible" != xyes; then
  AC_MSG_ERROR([--enable-stack-protector is not supported (compiler doesn't support -mstack-protector-guard=global)])
else
  TARGET_CFLAGS="$TARGET_CFLAGS -mstack-protector-guard=global"
  if test "x$enable_stack_protector" = xyes; then
    if test "x$ssp_possible" != xyes; then
      AC_MSG_ERROR([--enable-stack-protector is not supported (compiler doesn't support -fstack-protector)])
    fi
    TARGET_CFLAGS="$TARGET_CFLAGS -fstack-protector"
  elif test "x$enable_stack_protector" = xstrong; then
    if test "x$ssp_strong_possible" != xyes; then
      AC_MSG_ERROR([--enable-stack-protector=strong is not supported (compiler doesn't support -fstack-protector-strong)])
    fi
    TARGET_CFLAGS="$TARGET_CFLAGS -fstack-protector-strong"
  else
    # Note, -fstack-protector-all requires that the protector is disabled for
    # functions that appear in the call stack when the canary is initialized.
    AC_MSG_ERROR([invalid value $enable_stack_protector for --enable-stack-protector])
  fi
  TARGET_CPPFLAGS="$TARGET_CPPFLAGS -DGRUB_STACK_PROTECTOR=1"
fi

CFLAGS="$TARGET_CFLAGS"

grub_CHECK_STACK_ARG_PROBE
# Cygwin's GCC uses alloca() to probe the stackframe on static
# stack allocations above some threshold.
if test x"$sap_possible" = xyes; then
  TARGET_CFLAGS="$TARGET_CFLAGS -mno-stack-arg-probe"
fi

CFLAGS="$TARGET_CFLAGS"

# -mno-unaligned-access -mstrict-align
if test "$target_cpu" = arm; then
  AC_CACHE_CHECK([for compile options to get strict alignment], [grub_cv_target_cc_strict_align], [
    grub_cv_target_cc_strict_align=
    for arg in -mno-unaligned-access "-Xclang -mstrict-align" -mstrict-align; do
      CFLAGS="$TARGET_CFLAGS $arg -Werror"
      LDFLAGS="$TARGET_LDFLAGS"
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])], [flag=1], [flag=0])
      if test x"$flag" = x1; then
        grub_cv_target_cc_strict_align="$arg"
	break
      fi
    done])

  TARGET_CFLAGS="$TARGET_CFLAGS $grub_cv_target_cc_strict_align"
  if test x"$grub_cv_target_cc_strict_align" = x"-Xclang -mstrict-align"; then
    TARGET_LDFLAGS="$TARGET_LDFLAGS -Qunused-arguments"
  fi
  AC_CACHE_CHECK([if compiler generates unaligned accesses], [grub_cv_cc_target_emits_unaligned],
  [CFLAGS="$TARGET_CFLAGS"
   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
#ifdef __ARM_FEATURE_UNALIGNED
#error "unaligned"
#endif
     ]])],
     [grub_cv_cc_target_emits_unaligned=no], [grub_cv_cc_target_emits_unaligned=yes])])
  if test x$grub_cv_cc_target_emits_unaligned = xyes; then
    AC_MSG_ERROR([compiler generates unaligned accesses])
  fi
fi

# Set them to their new values for the tests below.
CC="$TARGET_CC"
if test x"$platform" = xemu ; then
CFLAGS="$TARGET_CFLAGS -Wno-error"
elif test "x$TARGET_APPLE_LINKER" = x1 ; then
CFLAGS="$TARGET_CFLAGS -nostdlib -static -Wno-error"
else
CFLAGS="$TARGET_CFLAGS -nostdlib -Wno-error"
fi
CPPFLAGS="$TARGET_CPPFLAGS"

grub_ASM_USCORE
if test "x$TARGET_APPLE_LINKER" = x0 && test x"$platform" != xemu; then
if test x$grub_cv_asm_uscore = xyes; then
DEFSYM="-Wl,--defsym,_abort=_main -Wl,--defsym,__main=_main"
else
DEFSYM="-Wl,--defsym,abort=main -Wl,--defsym,_main=main -Wl,--defsym,__main=main"
fi
CFLAGS="$TARGET_CFLAGS -nostdlib $DEFSYM"
fi

# Check for libgcc symbols
if test x"$platform" = xemu; then
AC_CHECK_FUNCS(__udivsi3 __umodsi3 __divsi3 __modsi3 __divdi3 __moddi3 __udivdi3 __umoddi3 __ctzdi2 __ctzsi2 __clzdi2 __aeabi_uidiv __aeabi_uidivmod __aeabi_idiv __aeabi_idivmod __aeabi_ulcmp __muldi3 __aeabi_lmul __aeabi_memcpy __aeabi_memcpy4 __aeabi_memcpy8 __aeabi_memclr __aeabi_memclr4 __aeabi_memclr8 __aeabi_memset __aeabi_lasr __aeabi_llsl __aeabi_llsr _restgpr_14_x __ucmpdi2 __ashldi3 __ashrdi3 __lshrdi3 __bswapsi2 __bswapdi2 __bzero __register_frame_info __deregister_frame_info ___chkstk_ms __chkstk_ms)
fi

if test "x$TARGET_APPLE_LINKER" = x1 ; then
CFLAGS="$TARGET_CFLAGS -nostdlib -static"
else
CFLAGS="$TARGET_CFLAGS -nostdlib"
fi
LIBS=""

# Defined in aclocal.m4.
grub_PROG_TARGET_CC
if test "x$TARGET_APPLE_LINKER" != x1 ; then
grub_PROG_OBJCOPY_ABSOLUTE
fi
grub_PROG_LD_BUILD_ID_NONE
if test "x$target_cpu" = xi386; then
  if test "$platform" != emu && test "x$TARGET_APPLE_LINKER" != x1 ; then
    if test ! -z "$TARGET_IMG_LDSCRIPT"; then
      # Check symbols provided by linker script.
      CFLAGS="$TARGET_CFLAGS -nostdlib ${TARGET_IMG_LDFLAGS_AC} ${TARGET_IMG_BASE_LDOPT},0x8000"
    fi
    grub_CHECK_BSS_START_SYMBOL
    grub_CHECK_END_SYMBOL
  fi
  CFLAGS="$TARGET_CFLAGS"
fi

grub_PROG_NM_WORKS
grub_PROG_NM_MINUS_P
grub_PROG_NM_DEFINED_ONLY
AC_SUBST(TARGET_NMFLAGS_MINUS_P)
AC_SUBST(TARGET_NMFLAGS_DEFINED_ONLY)

if test "$platform" != emu; then
AC_CACHE_CHECK([whether -nostdinc -isystem works], [grub_cv_cc_isystem], [
  SAVED_CPPFLAGS="$CPPFLAGS"
  CPPFLAGS="$TARGET_CPPFLAGS -nostdlib -nostdinc -isystem `$TARGET_CC -print-file-name=include`"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdarg.h>
#include <stddef.h>
int va_arg_func (int fixed, va_list args);]], [[]])],
      [grub_cv_cc_isystem=yes],
      [grub_cv_cc_isystem=no])
  CPPFLAGS="$SAVED_CPPFLAGS"
])

if test x"$grub_cv_cc_isystem" = xyes ; then
  TARGET_CPPFLAGS="$TARGET_CPPFLAGS -nostdinc -isystem `$TARGET_CC -print-file-name=include`"
fi
fi

AC_CACHE_CHECK([whether -Wtrampolines work], [grub_cv_cc_wtrampolines], [
  CFLAGS="$TARGET_CFLAGS -Wtrampolines -Werror"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdarg.h>
int va_arg_func (int fixed, va_list args);]], [[]])],
      [grub_cv_cc_wtrampolines=yes],
      [grub_cv_cc_wtrampolines=no])
])

if test x"$grub_cv_cc_wtrampolines" = xyes ; then
  TARGET_CFLAGS="$TARGET_CFLAGS -Wtrampolines"
fi

# Restore the flags.
CC="$tmp_CC"
CFLAGS="$tmp_CFLAGS"
CPPFLAGS="$tmp_CPPFLAGS"
LDFLAGS="$tmp_LDFLAGS"
LIBS="$tmp_LIBS"

#
# Check for options.
#

# Memory manager debugging.
AC_ARG_ENABLE([mm-debug],
	      AS_HELP_STRING([--enable-mm-debug],
                             [include memory manager debugging]))
if test x$enable_mm_debug = xyes; then
    AC_DEFINE([MM_DEBUG], [1],
            [Define to 1 if you enable memory manager debugging.])
fi

AC_ARG_ENABLE([cache-stats],
	      AS_HELP_STRING([--enable-cache-stats],
                             [enable disk cache statistics collection]))

if test x$enable_cache_stats = xyes; then
  DISK_CACHE_STATS=1
else
  DISK_CACHE_STATS=0
fi
AC_SUBST([DISK_CACHE_STATS])

AC_ARG_ENABLE([boot-time],
	      AS_HELP_STRING([--enable-boot-time],
                             [enable boot time statistics collection]))

if test x$enable_boot_time = xyes; then
  BOOT_TIME_STATS=1
else
  BOOT_TIME_STATS=0
fi
AC_SUBST([BOOT_TIME_STATS])

AC_ARG_ENABLE([grub-emu-sdl],
	      [AS_HELP_STRING([--enable-grub-emu-sdl],
                             [build and install the `grub-emu' debugging utility with SDL support (default=guessed)])])

AC_ARG_ENABLE([grub-emu-pci],
	      [AS_HELP_STRING([--enable-grub-emu-pci],
                             [build and install the `grub-emu' debugging utility with PCI support (potentially dangerous) (default=no)])])

if test "$platform" = emu; then

if test x"$enable_grub_emu_sdl" = xno ; then
  grub_emu_sdl_excuse="explicitly disabled"
fi
[if [ x"$grub_emu_sdl_excuse" = x ]; then
    # Check for libSDL libraries.]
AC_CHECK_LIB([SDL], [SDL_Init], [LIBSDL="-lSDL"],
    [grub_emu_sdl_excuse=["libSDL libraries are required to build \`grub-emu' with SDL support"]])
    AC_SUBST([LIBSDL])
[fi]

[if [ x"$grub_emu_sdl_excuse" = x ]; then
    # Check for headers.]
    AC_CHECK_HEADERS([SDL/SDL.h], [],
      [grub_emu_sdl_excuse=["libSDL header file is required to build \`grub-emu' with SDL support"]])
[fi]

if test x"enable_grub_emu_sdl" = xyes && test x"$grub_emu_sdl_excuse" != x ; then
  AC_MSG_ERROR([SDL support for grub-emu was explicitly requested but can't be compiled ($grub_emu_sdl_excuse)])
fi
if test x"$grub_emu_sdl_excuse" = x ; then
enable_grub_emu_sdl=yes
else
enable_grub_emu_sdl=no
fi

if test x"$enable_grub_emu_pci" != xyes ; then
   grub_emu_pci_excuse="not enabled"
fi

[if [ x"$grub_emu_pci_excuse" = x ]; then
      # Check for libpci libraries.]
   AC_CHECK_LIB([pciaccess], [pci_system_init], [LIBPCIACCESS="-lpciaccess"],
      [grub_emu_pci_excuse=["need libpciaccess library"]])
    AC_SUBST([LIBPCIACCESS])
[fi]
[if [ x"$grub_emu_pci_excuse" = x ]; then
    # Check for headers.]
    AC_CHECK_HEADERS([pciaccess.h], [],
      [grub_emu_pci_excuse=["need libpciaccess headers"]])
[fi]

if test x"$grub_emu_pci_excuse" = x ; then
enable_grub_emu_pci=yes
else

enable_grub_emu_pci=no
fi

AC_SUBST([enable_grub_emu_sdl])
AC_SUBST([enable_grub_emu_pci])

else

# Ignore --enable-emu-* if platform is not emu
enable_grub_emu_sdl=no
enable_grub_emu_pci=no
fi

AC_ARG_ENABLE([grub-mkfont],
	      [AS_HELP_STRING([--enable-grub-mkfont],
                             [build and install the `grub-mkfont' utility (default=guessed)])])
if test x"$enable_grub_mkfont" = xno ; then
  grub_mkfont_excuse="explicitly disabled"
fi

unset ac_cv_header_ft2build_h

if test x"$grub_mkfont_excuse" = x ; then
  # Check for freetype libraries.
  PKG_CHECK_MODULES([FREETYPE], [freetype2], [
    SAVED_CPPFLAGS="$CPPFLAGS"
    SAVED_LIBS="$LIBS"
    CPPFLAGS="$CPPFLAGS $FREETYPE_CFLAGS"
    LIBS="$LIBS $FREETYPE_LIBS"
    AC_CHECK_HEADERS([ft2build.h], [],
      [grub_mkfont_excuse=["need freetype2 headers"]])
    AC_LINK_IFELSE([AC_LANG_CALL([], [FT_Load_Glyph])], [],
      [grub_mkfont_excuse=["freetype2 library unusable"]])
    CPPFLAGS="$SAVED_CPPFLAGS"
    LIBS="$SAVED_LIBS"
  ], [grub_mkfont_excuse=["need freetype2 library"]])
fi

if test x"$enable_grub_mkfont" = xyes && test x"$grub_mkfont_excuse" != x ; then
  AC_MSG_ERROR([grub-mkfont was explicitly requested but can't be compiled ($grub_mkfont_excuse)])
fi
if test x"$grub_mkfont_excuse" = x ; then
enable_grub_mkfont=yes
else
enable_grub_mkfont=no
fi
AC_SUBST([enable_grub_mkfont])

SAVED_CC="$CC"
SAVED_CPP="$CPP"
SAVED_CFLAGS="$CFLAGS"
SAVED_CPPFLAGS="$CPPFLAGS"
SAVED_LDFLAGS="$LDFLAGS"
CC="$BUILD_CC"
CPP="$BUILD_CPP"
CFLAGS="$BUILD_CFLAGS"
CPPFLAGS="$BUILD_CPPFLAGS"
LDFLAGS="$BUILD_LDFAGS"

unset ac_cv_c_bigendian
unset ac_cv_header_ft2build_h

AC_COMPUTE_INT([BUILD_SIZEOF_VOID_P], [sizeof (void *)])
AC_COMPUTE_INT([BUILD_SIZEOF_LONG], [sizeof (long)])
AC_C_BIGENDIAN([BUILD_WORDS_BIGENDIAN=1], [BUILD_WORDS_BIGENDIAN=0], [BUILD_WORDS_BIGENDIAN=err], [BUILD_WORDS_BIGENDIAN=err])

if test x$BUILD_WORDS_BIGENDIAN = xerr ; then
   AC_MSG_ERROR([couldnt determine build endianness])
fi

AC_SUBST([BUILD_SIZEOF_LONG])
AC_SUBST([BUILD_SIZEOF_VOID_P])
AC_SUBST([BUILD_WORDS_BIGENDIAN])

if test x"$grub_build_mkfont_excuse" = x ; then
  # Check for freetype libraries.
  SAVED_PKG_CONFIG="$PKG_CONFIG"
  test -z "$BUILD_PKG_CONFIG" || PKG_CONFIG="$BUILD_PKG_CONFIG"
  PKG_CHECK_MODULES([BUILD_FREETYPE], [freetype2], [
    SAVED_CPPFLAGS_2="$CPPFLAGS"
    SAVED_LIBS="$LIBS"
    CPPFLAGS="$CPPFLAGS $BUILD_FREETYPE_CFLAGS"
    LIBS="$LIBS $BUILD_FREETYPE_LIBS"
    AC_CHECK_HEADERS([ft2build.h], [],
      [grub_build_mkfont_excuse=["need freetype2 headers"]])
    AC_LINK_IFELSE([AC_LANG_CALL([], [FT_Load_Glyph])], [],
      [grub_build_mkfont_excuse=["freetype2 library unusable"]])
    LIBS="$SAVED_LIBS"
    CPPFLAGS="$SAVED_CPPFLAGS_2"
  ], [grub_build_mkfont_excuse=["need freetype2 library"]])
  PKG_CONFIG="$SAVED_PKG_CONFIG"
fi

if test x"$enable_build_grub_mkfont" = xyes && test x"$grub_build_mkfont_excuse" != x ; then
  AC_MSG_ERROR([build-grub-mkfont was explicitly requested but can't be compiled ($grub_build_mkfont_excuse)])
fi
if test x"$grub_build_mkfont_excuse" = x ; then
  enable_build_grub_mkfont=yes
else
  enable_build_grub_mkfont=no
fi
if test x"$enable_build_grub_mkfont" = xno && ( test "x$platform" = xqemu || test "x$platform" = xloongson || test "x$platform" = xqemu_mips || test "x$platform" = xcoreboot ); then
  if test x"$grub_build_mkfont_excuse" = x ; then
    AC_MSG_ERROR([qemu, coreboot and loongson ports need build-time grub-mkfont])
  else
    AC_MSG_ERROR([qemu, coreboot and loongson ports need build-time grub-mkfont ($grub_build_mkfont_excuse)])
  fi
fi

CC="$SAVED_CC"
CPP="$SAVED_CPP"
CFLAGS="$SAVED_CFLAGS"
CPPFLAGS="$SAVED_CPPFLAGS"
LDFLAGS="$SAVED_LDFLAGS"


DJVU_FONT_SOURCE=

starfield_excuse=

AC_ARG_ENABLE([grub-themes],
	      [AS_HELP_STRING([--enable-grub-themes],
                             [build and install GRUB themes (default=guessed)])])
if test x"$enable_grub_themes" = xno ; then
  starfield_excuse="explicitly disabled"
fi

if test x"$starfield_excuse" = x && test x"$enable_build_grub_mkfont" = xno ; then
  starfield_excuse="No build-time grub-mkfont"
fi

if test x"$starfield_excuse" = x; then
   for ext in pcf pcf.gz bdf bdf.gz ttf ttf.gz; do
     for dir in . /usr/src /usr/share/fonts/X11/misc /usr/share/fonts/truetype/ttf-dejavu /usr/share/fonts/dejavu /usr/share/fonts/truetype; do
        if test -f "$dir/DejaVuSans.$ext"; then
          DJVU_FONT_SOURCE="$dir/DejaVuSans.$ext"
          break 2
        fi
     done
   done

   if test "x$DJVU_FONT_SOURCE" = x; then
     starfield_excuse="No DejaVu found"
   fi
fi

if test x"$enable_grub_themes" = xyes &&  test x"$starfield_excuse" != x; then
   AC_MSG_ERROR([themes were explicitly requested but requirements are not satisfied ($starfield_excuse)])
fi

AC_SUBST([DJVU_FONT_SOURCE])

FONT_SOURCE=

for ext in pcf pcf.gz bdf bdf.gz ttf ttf.gz; do
  for dir in . /usr/src /usr/share/fonts/X11/misc /usr/share/fonts/unifont /usr/share/fonts/uni /usr/share/fonts/truetype/unifont /usr/share/fonts/misc; do
    if test -f "$dir/unifont.$ext"; then
      md5="$(md5sum "$dir/unifont.$ext"|awk '{ print $1; }')"
      # PCF and BDF from version 6.3 isn't hanled properly by libfreetype.
      if test "$md5" = 0a54834d2788c83886a3e1785a6a1e61 || test "$md5" = 28f2565c7a41d8d407e2551159385edb || test "$md5" = dae5e588461b3b92b87b6ffee734f936 || test "$md5" = 4a3d687aa5bb329ed05f4263a1016791 ; then
        continue
      fi
      FONT_SOURCE="$dir/unifont.$ext"
      break 2
    fi
  done
done

if test x"$enable_build_grub_mkfont" = xno ; then
  FONT_SOURCE=
fi

if test "x$FONT_SOURCE" = x && ( test "x$platform" = xqemu || test "x$platform" = xloongson || test "x$platform" = xqemu_mips || test "x$platform" = xcoreboot ); then
  if test x"$grub_build_mkfont_excuse" = x ; then
    AC_MSG_ERROR([qemu, coreboot and loongson ports need unifont])
  else
    AC_MSG_ERROR([qemu, coreboot and loongson ports need unifont ($grub_build_mkfont_excuse)])
  fi
fi

AC_SUBST([FONT_SOURCE])

if test x"$FONT_SOURCE" = x &&  test x"$DJVU_FONT_SOURCE" = x && test x"$grub_build_mkfont_excuse" = x; then
  grub_build_mkfont_excuse="no fonts"
fi


AC_ARG_ENABLE([grub-mount],
	      [AS_HELP_STRING([--enable-grub-mount],
                             [build and install the `grub-mount' utility (default=guessed)])])
if test x"$enable_grub_mount" = xno ; then
  grub_mount_excuse="explicitly disabled"
fi

if test x"$grub_mount_excuse" = x ; then
  AC_CHECK_LIB([fuse], [fuse_main_real], [],
               [grub_mount_excuse="need FUSE library"])
fi

if test x"$grub_mount_excuse" = x ; then
  # Check for fuse headers.
  SAVED_CPPFLAGS="$CPPFLAGS"
  CPPFLAGS="$CPPFLAGS -DFUSE_USE_VERSION=26"
  AC_CHECK_HEADERS([fuse/fuse.h], [],
  	[grub_mount_excuse=["need FUSE headers"]])
  CPPFLAGS="$SAVED_CPPFLAGS"
fi

if test x"$enable_grub_mount" = xyes && test x"$grub_mount_excuse" != x ; then
  AC_MSG_ERROR([grub-mount was explicitly requested but can't be compiled ($grub_mount_excuse)])
fi
if test x"$grub_mount_excuse" = x ; then
enable_grub_mount=yes
else
enable_grub_mount=no
fi
AC_SUBST([enable_grub_mount])

AC_ARG_ENABLE([device-mapper],
              [AS_HELP_STRING([--enable-device-mapper],
                              [enable Linux device-mapper support (default=guessed)])])
if test x"$enable_device_mapper" = xno ; then
  device_mapper_excuse="explicitly disabled"
fi

if test x"$device_mapper_excuse" = x ; then
  # Check for device-mapper header.
  AC_CHECK_HEADER([libdevmapper.h], [],
               [device_mapper_excuse="need libdevmapper header"])
fi

if test x"$device_mapper_excuse" = x ; then
  # Check for device-mapper library.
  AC_CHECK_LIB([devmapper], [dm_task_create], [],
               [device_mapper_excuse="need devmapper library"])
fi

if test x"$device_mapper_excuse" = x ; then
  # Check for device-mapper library.
  AC_CHECK_LIB([devmapper], [dm_log_with_errno_init],
               [],
               [device_mapper_excuse="need devmapper library"])
fi

if test x"$device_mapper_excuse" = x ; then
   LIBDEVMAPPER="-ldevmapper"
   AC_DEFINE([HAVE_DEVICE_MAPPER], [1],
             [Define to 1 if you have the devmapper library.])
fi

AC_SUBST([LIBDEVMAPPER])

LIBGEOM=
if test x$host_kernel = xkfreebsd; then
  AC_CHECK_LIB([geom], [geom_gettree], [],
               [AC_MSG_ERROR([Your platform requires libgeom])])
  LIBGEOM="-lgeom"
fi

AC_SUBST([LIBGEOM])

AC_ARG_ENABLE([liblzma],
              [AS_HELP_STRING([--enable-liblzma],
                              [enable liblzma integration (default=guessed)])])
if test x"$enable_liblzma" = xno ; then
  liblzma_excuse="explicitly disabled"
fi

if test x"$liblzma_excuse" = x ; then
AC_CHECK_LIB([lzma], [lzma_code],
             [],[liblzma_excuse="need lzma library"])
fi
if test x"$liblzma_excuse" = x ; then
AC_CHECK_HEADER([lzma.h], [], [liblzma_excuse="need lzma header"])
fi

if test x"$enable_liblzma" = xyes && test x"$liblzma_excuse" != x ; then
  AC_MSG_ERROR([liblzma support was explicitly requested but requirements are not satisfied ($liblzma_excuse)])
fi


if test x"$liblzma_excuse" = x ; then
   LIBLZMA="-llzma"
   AC_DEFINE([USE_LIBLZMA], [1],
   	     [Define to 1 if you have the LZMA library.])
fi

AC_SUBST([LIBLZMA])

AC_ARG_ENABLE([libzfs],
              [AS_HELP_STRING([--enable-libzfs],
                              [enable libzfs integration (default=guessed)])])
if test x"$enable_libzfs" = xno ; then
  libzfs_excuse="explicitly disabled"
fi

if test x"$libzfs_excuse" = x ; then
  # Only check for system headers if libzfs support has not been disabled.
  AC_CHECK_HEADERS(libzfs.h libnvpair.h)
fi

if test x"$libzfs_excuse" = x ; then
  AC_CHECK_LIB([zfs], [libzfs_init],
               [],
               [libzfs_excuse="need zfs library"])
fi

if test x"$libzfs_excuse" = x ; then
  AC_CHECK_LIB([nvpair], [nvlist_lookup_string],
               [],
               [libzfs_excuse="need nvpair library"])
fi

if test x"$enable_libzfs" = xyes && test x"$libzfs_excuse" != x ; then
  AC_MSG_ERROR([libzfs support was explicitly requested but requirements are not satisfied ($libzfs_excuse)])
fi

if test x"$libzfs_excuse" = x ; then
  # We need both libzfs and libnvpair for a successful build.
  LIBZFS="-lzfs"
  AC_DEFINE([HAVE_LIBZFS], [1],
            [Define to 1 if you have the ZFS library.])
  LIBNVPAIR="-lnvpair"
  AC_DEFINE([HAVE_LIBNVPAIR], [1],
            [Define to 1 if you have the NVPAIR library.])
fi

AC_SUBST([LIBZFS])
AC_SUBST([LIBNVPAIR])

LIBS=""

AC_SUBST([FONT_SOURCE])
AS_IF([test x$target_cpu = xi386 -a x$platform = xqemu],
	    [AC_SUBST([GRUB_BOOT_MACHINE_LINK_ADDR], 0xffe00)])

AC_SUBST(HAVE_ASM_USCORE)
AC_SUBST(BSS_START_SYMBOL)
AC_SUBST(END_SYMBOL)
AC_SUBST(PACKAGE)
AC_SUBST(VERSION)

AC_ARG_ENABLE([werror],
	      [AS_HELP_STRING([--disable-werror],
                             [do not use -Werror when building GRUB])])
if test x"$enable_werror" != xno ; then
  TARGET_CFLAGS="$TARGET_CFLAGS -Werror"
  HOST_CFLAGS="$HOST_CFLAGS -Werror"
fi

TARGET_CPP="$TARGET_CC -E"
TARGET_CCAS=$TARGET_CC

# Includes which include make-time substitutions. They must come last
# as to avoid executing top_builddir in shell.
HOST_CPPFLAGS="$HOST_CPPFLAGS -I\$(top_builddir)/include"
TARGET_CPPFLAGS="$TARGET_CPPFLAGS -I\$(top_srcdir)/include"
TARGET_CPPFLAGS="$TARGET_CPPFLAGS -I\$(top_builddir)/include"

GRUB_TARGET_CPU="${target_cpu}"
GRUB_PLATFORM="${platform}"

AC_SUBST(GRUB_TARGET_CPU)
AC_SUBST(GRUB_PLATFORM)

AC_SUBST(TARGET_OBJCONV)
AC_SUBST(TARGET_CPP)
AC_SUBST(TARGET_CCAS)
AC_SUBST(TARGET_OBJ2ELF)
AC_SUBST(TARGET_MODULE_FORMAT)
AC_SUBST(TARGET_CC_VERSION)

AC_SUBST(TARGET_CFLAGS)
AC_SUBST(TARGET_LDFLAGS)
AC_SUBST(TARGET_CPPFLAGS)
AC_SUBST(TARGET_CCASFLAGS)

AC_SUBST(TARGET_IMG_LDFLAGS)
AC_SUBST(TARGET_IMG_CFLAGS)
AC_SUBST(TARGET_IMG_BASE_LDOPT)
AC_SUBST(TARGET_APPLE_LINKER)

AC_SUBST(HOST_CFLAGS)
AC_SUBST(HOST_LDFLAGS)
AC_SUBST(HOST_CPPFLAGS)
AC_SUBST(HOST_CCASFLAGS)

AC_SUBST(BUILD_LIBM)

#
# Automake conditionals
#

AM_CONDITIONAL([COND_real_platform], [test x$platform != xnone])
AM_CONDITIONAL([COND_emu], [test x$platform = xemu])
AM_CONDITIONAL([COND_i386_pc], [test x$target_cpu = xi386 -a x$platform = xpc])
AM_CONDITIONAL([COND_i386_efi], [test x$target_cpu = xi386 -a x$platform = xefi])
AM_CONDITIONAL([COND_ia64_efi], [test x$target_cpu = xia64 -a x$platform = xefi])
AM_CONDITIONAL([COND_i386_qemu], [test x$target_cpu = xi386 -a x$platform = xqemu])
AM_CONDITIONAL([COND_i386_ieee1275], [test x$target_cpu = xi386 -a x$platform = xieee1275])
AM_CONDITIONAL([COND_i386_coreboot], [test x$target_cpu = xi386 -a x$platform = xcoreboot])
AM_CONDITIONAL([COND_i386_multiboot], [test x$target_cpu = xi386 -a x$platform = xmultiboot])
AM_CONDITIONAL([COND_x86_64_efi], [test x$target_cpu = xx86_64 -a x$platform = xefi])
AM_CONDITIONAL([COND_i386_xen], [test x$target_cpu = xi386 -a x$platform = xxen])
AM_CONDITIONAL([COND_i386_xen_pvh], [test x$target_cpu = xi386 -a x$platform = xxen_pvh])
AM_CONDITIONAL([COND_x86_64_xen], [test x$target_cpu = xx86_64 -a x$platform = xxen])
AM_CONDITIONAL([COND_mips_loongson], [test x$target_cpu = xmipsel -a x$platform = xloongson])
AM_CONDITIONAL([COND_mips_qemu_mips], [test "(" x$target_cpu = xmips -o x$target_cpu = xmipsel ")"  -a x$platform = xqemu_mips])
AM_CONDITIONAL([COND_mips_arc], [test "(" x$target_cpu = xmips -o x$target_cpu = xmipsel ")"  -a x$platform = xarc])
AM_CONDITIONAL([COND_sparc64_ieee1275], [test x$target_cpu = xsparc64 -a x$platform = xieee1275])
AM_CONDITIONAL([COND_sparc64_emu], [test x$target_cpu = xsparc64 -a x$platform = xemu])
AM_CONDITIONAL([COND_powerpc_ieee1275], [test x$target_cpu = xpowerpc -a x$platform = xieee1275])
AM_CONDITIONAL([COND_mips], [test x$target_cpu = xmips -o x$target_cpu = xmipsel])
AM_CONDITIONAL([COND_mipsel], [test x$target_cpu = xmipsel])
AM_CONDITIONAL([COND_mipseb], [test x$target_cpu = xmips])
AM_CONDITIONAL([COND_arm], [test x$target_cpu = xarm ])
AM_CONDITIONAL([COND_arm_uboot], [test x$target_cpu = xarm -a x$platform = xuboot])
AM_CONDITIONAL([COND_arm_coreboot], [test x$target_cpu = xarm -a x$platform = xcoreboot])
AM_CONDITIONAL([COND_arm_efi], [test x$target_cpu = xarm -a x$platform = xefi])
AM_CONDITIONAL([COND_arm64], [test x$target_cpu = xarm64 ])
AM_CONDITIONAL([COND_arm64_efi], [test x$target_cpu = xarm64 -a x$platform = xefi])
AM_CONDITIONAL([COND_riscv32], [test x$target_cpu = xriscv32 ])
AM_CONDITIONAL([COND_riscv64], [test x$target_cpu = xriscv64 ])
AM_CONDITIONAL([COND_riscv32_efi], [test x$target_cpu = xriscv32 -a x$platform = xefi])
AM_CONDITIONAL([COND_riscv64_efi], [test x$target_cpu = xriscv64 -a x$platform = xefi])

AM_CONDITIONAL([COND_HOST_HURD], [test x$host_kernel = xhurd])
AM_CONDITIONAL([COND_HOST_LINUX], [test x$host_kernel = xlinux])
AM_CONDITIONAL([COND_HOST_NETBSD], [test x$host_kernel = xnetbsd])
AM_CONDITIONAL([COND_HOST_WINDOWS], [test x$host_kernel = xwindows])
AM_CONDITIONAL([COND_HOST_KFREEBSD], [test x$host_kernel = xkfreebsd])
AM_CONDITIONAL([COND_HOST_XNU], [test x$host_kernel = xxnu])
AM_CONDITIONAL([COND_HOST_ILLUMOS], [test x$host_kernel = xillumos])

AM_CONDITIONAL([COND_MAN_PAGES], [test x$cross_compiling = xno -a x$HELP2MAN != x])
AM_CONDITIONAL([COND_GRUB_EMU_SDL], [test x$enable_grub_emu_sdl = xyes])
AM_CONDITIONAL([COND_GRUB_EMU_PCI], [test x$enable_grub_emu_pci = xyes])
AM_CONDITIONAL([COND_GRUB_MKFONT], [test x$enable_grub_mkfont = xyes])
AM_CONDITIONAL([COND_GRUB_MOUNT], [test x$enable_grub_mount = xyes])
AM_CONDITIONAL([COND_HAVE_FONT_SOURCE], [test x$FONT_SOURCE != x])
if test x$FONT_SOURCE != x ; then
   HAVE_FONT_SOURCE=1
else
   HAVE_FONT_SOURCE=0
fi
AC_SUBST(HAVE_FONT_SOURCE)
AM_CONDITIONAL([COND_APPLE_LINKER], [test x$TARGET_APPLE_LINKER = x1])
AM_CONDITIONAL([COND_ENABLE_EFIEMU], [test x$enable_efiemu = xyes])
AM_CONDITIONAL([COND_ENABLE_CACHE_STATS], [test x$DISK_CACHE_STATS = x1])
AM_CONDITIONAL([COND_ENABLE_BOOT_TIME_STATS], [test x$BOOT_TIME_STATS = x1])

AM_CONDITIONAL([COND_HAVE_CXX], [test x$HAVE_CXX = xyes])

AM_CONDITIONAL([COND_HAVE_ASM_USCORE], [test x$HAVE_ASM_USCORE = x1])
AM_CONDITIONAL([COND_STARFIELD], [test "x$starfield_excuse" = x])
AM_CONDITIONAL([COND_HAVE_EXEC], [test "x$have_exec" = xy])

test "x$prefix" = xNONE && prefix="$ac_default_prefix"
test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
datarootdir="$(eval echo "$datarootdir")"
grub_libdir="$(eval echo "$libdir")"
grub_localedir="$(eval echo "$localedir")"
grub_datadir="$(eval echo "$datadir")"
grub_sysconfdir="$(eval echo "$sysconfdir")"
AC_DEFINE_UNQUOTED(LOCALEDIR, "$grub_localedir", [Locale dir])
AC_DEFINE_UNQUOTED(GRUB_LIBDIR, "$grub_libdir", [Library dir])
AC_DEFINE_UNQUOTED(GRUB_DATADIR, "$grub_datadir", [Data dir])
AC_DEFINE_UNQUOTED(GRUB_SYSCONFDIR, "$grub_sysconfdir", [Configuration dir])


# Output files.
if test "$platform" != none; then
  cpudir="${target_cpu}"
  if test x${cpudir} = xmipsel; then
    cpudir=mips;
  fi
  grub_CHECK_LINK_DIR
  if test x"$link_dir" = xyes ; then
    AC_CONFIG_LINKS([include/grub/cpu:include/grub/$cpudir])
    if test "$platform" != emu ; then
      AC_CONFIG_LINKS([include/grub/machine:include/grub/$cpudir/$platform])
    fi
  else
    mkdir -p include/grub 2>/dev/null
    rm -rf include/grub/cpu
    cp -rp $srcdir/include/grub/$cpudir include/grub/cpu 2>/dev/null
    if test "$platform" != emu ; then
      rm -rf include/grub/machine
      cp -rp $srcdir/include/grub/$cpudir/$platform include/grub/machine 2>/dev/null
    fi
  fi
else
  # Just enough to stop the compiler failing with -I$(srcdir)/include.
  mkdir -p include 2>/dev/null
  rm -rf include/grub/cpu include/grub/machine
fi

AC_CONFIG_FILES([Makefile])
AC_CONFIG_FILES([grub-core/Makefile])
AC_CONFIG_FILES([grub-core/lib/gnulib/Makefile])
AC_CONFIG_FILES([po/Makefile.in])
AC_CONFIG_FILES([docs/Makefile])
AC_CONFIG_FILES([util/bash-completion.d/Makefile])
AC_CONFIG_FILES([stamp-h], [echo timestamp > stamp-h])
AC_CONFIG_FILES([config.h])

AC_OUTPUT
[
echo "*******************************************************"
echo GRUB2 will be compiled with following components:
echo Platform: "$target_cpu"-"$platform"
if [ x"$platform" = xemu ]; then
if [ x"$grub_emu_sdl_excuse" = x ]; then
echo SDL support for grub-emu: Yes
else
echo SDL support for grub-emu: No "($grub_emu_sdl_excuse)"
fi
if [ x"$grub_emu_pci_excuse" = x ]; then
echo PCI support for grub-emu: Yes
else
echo PCI support for grub-emu: No "($grub_emu_pci_excuse)"
fi
fi
if test x"$device_mapper_excuse" = x ; then
echo With devmapper support: Yes
else
echo With devmapper support: No "($device_mapper_excuse)"
fi
if [ x"$enable_mm_debug" = xyes ]; then
echo With memory debugging: Yes
else
echo With memory debugging: No
fi
if [ x"$enable_cache_stats" = xyes ]; then
echo With disk cache statistics: Yes
else
echo With disk cache statistics: No
fi

if [ x"$enable_boot_time" = xyes ]; then
echo With boot time statistics: Yes
else
echo With boot time statistics: No
fi

if [ x"$efiemu_excuse" = x ]; then
echo efiemu runtime: Yes
else
echo efiemu runtime: No "($efiemu_excuse)"
fi
if [ x"$grub_mkfont_excuse" = x ]; then
echo grub-mkfont: Yes
else
echo grub-mkfont: No "($grub_mkfont_excuse)"
fi
if [ x"$grub_mount_excuse" = x ]; then
echo grub-mount: Yes
else
echo grub-mount: No "($grub_mount_excuse)"
fi
if [ x"$starfield_excuse" = x ]; then
echo starfield theme: Yes
echo With DejaVuSans font from $DJVU_FONT_SOURCE
else
echo starfield theme: No "($starfield_excuse)"
fi
if [ x"$libzfs_excuse" = x ]; then
echo With libzfs support: Yes
else
echo With libzfs support: No "($libzfs_excuse)"
fi
if [ x"$grub_build_mkfont_excuse" = x ]; then
  echo Build-time grub-mkfont: Yes
  if test "x$FONT_SOURCE" = x ; then
    echo "Without unifont"
  else
    echo "With unifont from $FONT_SOURCE"
  fi
else
  echo Build-time grub-mkfont: No "($grub_build_mkfont_excuse)"
  echo "Without unifont (no build-time grub-mkfont)"
fi
if test x"$liblzma_excuse" != x ; then
echo "Without liblzma (no support for XZ-compressed mips images) ($liblzma_excuse)"
else
echo "With liblzma from $LIBLZMA (support for XZ-compressed mips images)"
fi
if test "x$enable_stack_protector" != xno; then
echo "With stack smashing protector: Yes"
else
echo "With stack smashing protector: No"
fi
echo "*******************************************************"
]