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set(linkWarning "${link_warning_as_error}")
if (DEFINED CMAKE_LINK_WARNING_AS_ERROR)
set(linkWarning "${CMAKE_LINK_WARNING_AS_ERROR}")
endif()
if (linkWarning STREQUAL "ON")
set (linkWarning DRIVER LINKER)
endif()
if((linkWarning STREQUAL "DRIVER;LINKER" AND NOT CMAKE_C_COMPILE_OPTIONS_WARNING_AS_ERROR
AND NOT CMAKE_C_LINK_OPTIONS_WARNING_AS_ERROR)
OR (linkWarning STREQUAL "DRIVER" AND NOT CMAKE_C_COMPILE_OPTIONS_WARNING_AS_ERROR)
OR (linkWarning STREQUAL "LINKER" AND NOT CMAKE_C_LINK_OPTIONS_WARNING_AS_ERROR))
set(WarnErrorFlags "UNDEFINED")
else()
set(cfg_dir)
get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
if(_isMultiConfig)
set(cfg_dir /Debug)
endif()
set(DUMP_EXE "${CMAKE_CURRENT_BINARY_DIR}${cfg_dir}/dump${CMAKE_EXECUTABLE_SUFFIX}")
add_executable(dump dump.c)
set_property(TARGET dump PROPERTY LINK_WARNING_AS_ERROR OFF)
# ensure no temp file nor response file will be used
set(CMAKE_C_USE_RESPONSE_FILE_FOR_LIBRARIES 0)
string(REPLACE "${CMAKE_START_TEMP_FILE}" "" CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_LINK_EXECUTABLE}")
string(REPLACE "${CMAKE_END_TEMP_FILE}" "" CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_LINK_EXECUTABLE}")
add_executable(main main.c)
if(CMAKE_GENERATOR MATCHES "FASTBuild")
# FASTBuild needs output to exist.
file(TOUCH "${CMAKE_CURRENT_BINARY_DIR}${cfg_dir}/main${CMAKE_EXECUTABLE_SUFFIX}")
endif()
if (NOT DEFINED CMAKE_LINK_WARNING_AS_ERROR)
set_property(TARGET main PROPERTY LINK_WARNING_AS_ERROR ${link_warning_as_error})
endif()
# use LAUNCH facility to dump linker command
set_property(TARGET main PROPERTY RULE_LAUNCH_LINK "\"${DUMP_EXE}\"")
add_dependencies(main dump)
# generate reference for WARNING_AS_ERROR flag
unset(compiler_WarnError)
unset(linker_WarnError)
unset(WarnErrorFlags)
## DRIVER
if (CMAKE_C_LINK_MODE STREQUAL "DRIVER")
list(JOIN CMAKE_C_COMPILE_OPTIONS_WARNING_AS_ERROR " " compiler_WarnError)
endif()
## LINKER
string(REPLACE "LINKER:" "" linker_WarnError "${CMAKE_C_LINK_OPTIONS_WARNING_AS_ERROR}")
if (CMAKE_C_LINKER_WRAPPER_FLAG)
set(linker_flag ${CMAKE_C_LINKER_WRAPPER_FLAG})
list(GET linker_flag -1 linker_space)
if (linker_space STREQUAL " ")
list(REMOVE_AT linker_flag -1)
else()
set(linker_space)
endif()
list(JOIN linker_flag " " linker_flag)
if (CMAKE_C_LINKER_WRAPPER_FLAG_SEP)
string(REPLACE "," "${CMAKE_C_LINKER_WRAPPER_FLAG_SEP}" linker_WarnError "${linker_WarnError}")
set(linker_WarnError "${linker_flag}${linker_space}${linker_WarnError}")
else()
set(linker_prefix "${linker_flag}${linker_space}")
string(REPLACE "," ";" linker_WarnError "${linker_WarnError}")
list(TRANSFORM linker_WarnError PREPEND "${linker_prefix}")
list(JOIN linker_WarnError " " linker_WarnError)
endif()
else()
string(REPLACE "," " " linker_WarnError "${linker_WarnError}")
endif()
# Add regex [^-] to avoid matching of MSVC compiler flag -WX-
if(linkWarning STREQUAL "DRIVER;LINKER")
set(WarnErrorFlags "${compiler_WarnError}")
if (WarnErrorFlags)
string(APPEND WarnErrorFlags " ${linker_WarnError}[^-]")
else()
set(WarnErrorFlags "${linker_WarnError}[^-]")
endif()
elseif(linkWarning STREQUAL "DRIVER")
set(WarnErrorFlags "${compiler_WarnError}[^-]")
elseif(linkWarning STREQUAL "LINKER")
set(WarnErrorFlags "${linker_WarnError}[^-]")
else()
# OFF value
if(compiler_WarnError AND linker_WarnError)
set(WarnErrorFlags "(${compiler_WarnError}[^-]|${linker_WarnError}[^-])+")
elseif(compiler_WarnError)
set(WarnErrorFlags "${compiler_WarnError}[^-]")
elseif(linker_WarnError)
set(WarnErrorFlags "${linker_WarnError}[^-]")
endif()
if(NOT WarnErrorFlags)
set(WarnErrorFlags "UNDEFINED")
endif()
endif()
endif()
if(CMAKE_GENERATOR MATCHES "Visual Studio")
# replace '-' with '/' for options
string(REGEX REPLACE "-([A-Z]+)" "[-/]\\1" WarnErrorFlags "${WarnErrorFlags}")
endif()
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/WARNING_AS_ERROR.txt" "${WarnErrorFlags}")
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