putty/cmake/setup.cmake

# Forcibly re-enable assertions, even if we're building in release
# mode. This is a security project - assertions may be enforcing
# security-critical constraints. A backstop #ifdef in defs.h should
# give a #error if this manoeuvre doesn't do what it needs to.
string(REPLACE "/DNDEBUG" "" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
string(REPLACE "-DNDEBUG" "" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
string(REPLACE "/DNDEBUG" "" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}")
string(REPLACE "-DNDEBUG" "" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}")

set(PUTTY_IPV6 ON
  CACHE BOOL "Build PuTTY with IPv6 support if possible")
set(PUTTY_DEBUG OFF
  CACHE BOOL "Build PuTTY with debug() statements enabled")
set(PUTTY_FUZZING OFF
  CACHE BOOL "Build PuTTY binaries suitable for fuzzing, NOT FOR REAL USE")
set(PUTTY_COVERAGE OFF
  CACHE BOOL "Build PuTTY binaries suitable for code coverage analysis")
set(PUTTY_COMPRESS_SCROLLBACK ON
  # This is always on in production versions of PuTTY, but downstreams
  # of the code have been known to find it a better tradeoff to
  # disable it. So there's a #ifdef in terminal.c, and a cmake option
  # to enable that ifdef just in case it needs testing or debugging.
  CACHE BOOL "Store terminal scrollback in compressed form")

set(STRICT OFF
  CACHE BOOL "Enable extra compiler warnings and make them errors")

include(FindGit)

set(GENERATED_SOURCES_DIR ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY})

set(GENERATED_LICENCE_H ${GENERATED_SOURCES_DIR}/licence.h)
set(INTERMEDIATE_LICENCE_H ${GENERATED_LICENCE_H}.tmp)
add_custom_command(OUTPUT ${INTERMEDIATE_LICENCE_H}
  COMMAND ${CMAKE_COMMAND}
    -DLICENCE_FILE=${CMAKE_SOURCE_DIR}/LICENCE
    -DOUTPUT_FILE=${INTERMEDIATE_LICENCE_H}
    -P ${CMAKE_SOURCE_DIR}/cmake/licence.cmake
  DEPENDS ${CMAKE_SOURCE_DIR}/cmake/licence.cmake ${CMAKE_SOURCE_DIR}/LICENCE)
add_custom_target(generated_licence_h
  BYPRODUCTS ${GENERATED_LICENCE_H}
  COMMAND ${CMAKE_COMMAND} -E copy_if_different
    ${INTERMEDIATE_LICENCE_H} ${GENERATED_LICENCE_H}
  DEPENDS ${INTERMEDIATE_LICENCE_H}
  COMMENT "Updating licence.h")

set(GENERATED_COMMIT_C ${GENERATED_SOURCES_DIR}/cmake_commit.c)
set(INTERMEDIATE_COMMIT_C ${GENERATED_COMMIT_C}.tmp)
add_custom_target(check_git_commit
  BYPRODUCTS ${INTERMEDIATE_COMMIT_C}
  COMMAND ${CMAKE_COMMAND}
    -DGIT_EXECUTABLE=${GIT_EXECUTABLE}
    -DOUTPUT_FILE=${INTERMEDIATE_COMMIT_C}
    -DOUTPUT_TYPE=header
    -P ${CMAKE_SOURCE_DIR}/cmake/gitcommit.cmake
  DEPENDS ${CMAKE_SOURCE_DIR}/cmake/gitcommit.cmake
  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
  COMMENT "Checking current git commit")
add_custom_target(cmake_commit_c
  BYPRODUCTS ${GENERATED_COMMIT_C}
  COMMAND ${CMAKE_COMMAND} -E copy_if_different
    ${INTERMEDIATE_COMMIT_C} ${GENERATED_COMMIT_C}
  DEPENDS check_git_commit ${INTERMEDIATE_COMMIT_C}
  COMMENT "Updating cmake_commit.c")

if(CMAKE_VERSION VERSION_LESS 3.12)
  function(add_compile_definitions)
    foreach(i ${ARGN})
      add_compile_options(-D${i})
    endforeach()
  endfunction()
endif()

function(add_sources_from_current_dir target)
  set(sources)
  foreach(i ${ARGN})
    set(sources ${sources} ${CMAKE_CURRENT_SOURCE_DIR}/${i})
  endforeach()
  target_sources(${target} PRIVATE ${sources})
endfunction()

set(extra_dirs)
if(CMAKE_SYSTEM_NAME MATCHES "Windows" OR WINELIB)
  set(platform windows)
else()
  set(platform unix)
endif()

function(be_list TARGET NAME)
  cmake_parse_arguments(OPT "SSH;SERIAL;OTHERBACKENDS" "" "" "${ARGN}")
  add_library(${TARGET}-be-list OBJECT ${CMAKE_SOURCE_DIR}/be_list.c)
  foreach(setting SSH SERIAL OTHERBACKENDS)
    if(OPT_${setting})
      target_compile_definitions(${TARGET}-be-list PRIVATE ${setting}=1)
    else()
      target_compile_definitions(${TARGET}-be-list PRIVATE ${setting}=0)
    endif()
  endforeach()
  target_compile_definitions(${TARGET}-be-list PRIVATE APPNAME=${NAME})
  target_sources(${TARGET} PRIVATE $<TARGET_OBJECTS:${TARGET}-be-list>)
endfunction()

include(cmake/platforms/${platform}.cmake)

include_directories(
  ${CMAKE_CURRENT_SOURCE_DIR}
  ${GENERATED_SOURCES_DIR}
  ${platform}
  ${extra_dirs})

check_c_source_compiles("
#define _ISOC11_SOURCE
#include <stdlib.h>
int main(int argc, char **argv) {
    void *p = aligned_alloc(128, 12345);
    free(p);
}" HAVE_ALIGNED_ALLOC)

if(PUTTY_DEBUG)
  add_compile_definitions(DEBUG)
endif()
if(PUTTY_FUZZING)
  add_compile_definitions(FUZZING)
endif()
if(NOT PUTTY_COMPRESS_SCROLLBACK)
  set(NO_SCROLLBACK_COMPRESSION ON)
endif()
if(PUTTY_COVERAGE)
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs -ftest-coverage -g ")
endif()