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CMake/Modules/CheckCCompilerFlag.cmake

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ENH: two macros to check whether the C/CXX compiler supports a given flag: CHECK_CXX_COMPILER_FLAG("-Wall" COMPILER_SUPPORTS_WALL) Alex
2006-09-19 01:55:22 +04:00
# - Check whether the C compiler supports a given flag.
Cleanup generic compiler check macro documentation This commit improves formatting and style of the documentation for the general-purpose compiler check macros: CHECK_C_COMPILER_FLAG CHECK_C_SOURCE_COMPILES CHECK_C_SOURCE_RUNS CHECK_CXX_COMPILER_FLAG CHECK_CXX_SOURCE_COMPILES CHECK_CXX_SOURCE_RUNS This sytle is more consistent with CMake command documentation. It also looks nicer in the generated documentation text files.
2009-09-17 23:28:51 +04:00
# CHECK_C_COMPILER_FLAG(<flag> <var>)
# <flag> - the compiler flag
# <var> - variable to store the result
Check*CompilerFlag: Document use of CMAKE_REQUIRED_DEFINITIONS (#14309) Explain how CMAKE_REQUIRED_DEFINITIONS is set before calling the check_*_source_compiles macros.
2013-07-25 16:25:15 +04:00
# This internally calls the check_c_source_compiles macro and
# sets CMAKE_REQUIRED_DEFINITIONS to <flag>.
Cleanup generic compiler check macro documentation This commit improves formatting and style of the documentation for the general-purpose compiler check macros: CHECK_C_COMPILER_FLAG CHECK_C_SOURCE_COMPILES CHECK_C_SOURCE_RUNS CHECK_CXX_COMPILER_FLAG CHECK_CXX_SOURCE_COMPILES CHECK_CXX_SOURCE_RUNS This sytle is more consistent with CMake command documentation. It also looks nicer in the generated documentation text files.
2009-09-17 23:28:51 +04:00
# See help for CheckCSourceCompiles for a listing of variables
Check*CompilerFlag: Document use of CMAKE_REQUIRED_DEFINITIONS (#14309) Explain how CMAKE_REQUIRED_DEFINITIONS is set before calling the check_*_source_compiles macros.
2013-07-25 16:25:15 +04:00
# that can otherwise modify the build.
ENH: two macros to check whether the C/CXX compiler supports a given flag: CHECK_CXX_COMPILER_FLAG("-Wall" COMPILER_SUPPORTS_WALL) Alex
2006-09-19 01:55:22 +04:00
Convert CMake non-find modules to BSD License This adds copyright/license notification blocks CMake's non-find modules. Most of the modules had no notices at all. Some had notices referring to the BSD license already. This commit normalizes existing notices and adds missing notices.
2009-09-28 19:46:51 +04:00
#=============================================================================
CheckCCompilerFlag: Generalize "but not for C" case (#12633) The "warning: " part is not necessary. The case can happen on any GNU compiler, not just an Apple version.
2011-12-22 18:39:25 +04:00
# Copyright 2006-2011 Kitware, Inc.
Convert CMake non-find modules to BSD License This adds copyright/license notification blocks CMake's non-find modules. Most of the modules had no notices at all. Some had notices referring to the BSD license already. This commit normalizes existing notices and adds missing notices.
2009-09-28 19:46:51 +04:00
# Copyright 2006 Alexander Neundorf <neundorf@kde.org>
Improve checks for Open64 and g++ incompatible flags (#12119)
2012-02-12 13:42:54 +04:00
# Copyright 2011 Matthias Kretz <kretz@kde.org>
ENH: two macros to check whether the C/CXX compiler supports a given flag: CHECK_CXX_COMPILER_FLAG("-Wall" COMPILER_SUPPORTS_WALL) Alex
2006-09-19 01:55:22 +04:00
#
Convert CMake non-find modules to BSD License This adds copyright/license notification blocks CMake's non-find modules. Most of the modules had no notices at all. Some had notices referring to the BSD license already. This commit normalizes existing notices and adds missing notices.
2009-09-28 19:46:51 +04:00
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
Modules: Fix spelling 'To distributed' -> 'To distribute'
2010-08-07 04:48:47 +04:00
# (To distribute this file outside of CMake, substitute the full
Convert CMake non-find modules to BSD License This adds copyright/license notification blocks CMake's non-find modules. Most of the modules had no notices at all. Some had notices referring to the BSD license already. This commit normalizes existing notices and adds missing notices.
2009-09-28 19:46:51 +04:00
# License text for the above reference.)
ENH: two macros to check whether the C/CXX compiler supports a given flag: CHECK_CXX_COMPILER_FLAG("-Wall" COMPILER_SUPPORTS_WALL) Alex
2006-09-19 01:55:22 +04:00
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 21:47:32 +04:00
include(CheckCSourceCompiles)
ENH: two macros to check whether the C/CXX compiler supports a given flag: CHECK_CXX_COMPILER_FLAG("-Wall" COMPILER_SUPPORTS_WALL) Alex
2006-09-19 01:55:22 +04:00
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 21:47:32 +04:00
macro (CHECK_C_COMPILER_FLAG _FLAG _RESULT)
set(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}")
set(CMAKE_REQUIRED_DEFINITIONS "${_FLAG}")
Check{C,CXX}CompilerFlag: Test using C locale (#14102) Set the locale to C while running the compiler for these checks because we match the resulting warning messages in English only. Suggested-by: Marco Nolden <m.nolden@dkfz-heidelberg.de>
2013-04-22 16:50:08 +04:00
# Normalize locale during test compilation.
set(_CheckCCompilerFlag_LOCALE_VARS LC_ALL LC_MESSAGES LANG)
foreach(v ${_CheckCCompilerFlag_LOCALE_VARS})
set(_CheckCCompilerFlag_SAVED_${v} "$ENV{${v}}")
set(ENV{${v}} C)
endforeach()
CheckCCompilerFlag: Strict signature of 'main' (#11615) Use "int main(void)" instead of just "int main()" so that compiling with "gcc -Werror=strict-prototypes" works. Test this check using the flags "-Werror -Wstrict-prototypes" to work with old GCC versions.
2010-12-16 21:34:54 +03:00
CHECK_C_SOURCE_COMPILES("int main(void) { return 0; }" ${_RESULT}
Fix CHECK_(C|CXX)_COMPILER_FLAG for GNU and MSVC These compilers warn and return 0 for unrecognized flags. We fix the compiler flag check macros by looking for a warning in the output. See issue #9516.
2009-09-17 23:32:54 +04:00
# Some compilers do not fail with a bad flag
CheckCCompilerFlag: Generalize "but not for C" case (#12633) The "warning: " part is not necessary. The case can happen on any GNU compiler, not just an Apple version.
2011-12-22 18:39:25 +04:00
FAIL_REGEX "command line option .* is valid for .* but not for C" # GNU
Fix CHECK_(C|CXX)_COMPILER_FLAG for XL and SunPro These compilers warn and return 0 for unrecognized flags. We fix the compiler flag check macros by looking for a warning in the output. We also update the regex for GNU on older Macs. See issue #9516.
2009-09-18 17:49:44 +04:00
FAIL_REGEX "unrecognized .*option" # GNU
Fix CHECK_(C|CXX)_COMPILER_FLAG for Clang (#12394) This compiler warns and returns 0 for unrecognized flags. We fix the compiler flag check macros by looking for a warning in the output.
2011-08-08 20:53:17 +04:00
FAIL_REGEX "unknown .*option" # Clang
Fix CHECK_(C|CXX)_COMPILER_FLAG for GNU and MSVC These compilers warn and return 0 for unrecognized flags. We fix the compiler flag check macros by looking for a warning in the output. See issue #9516.
2009-09-17 23:32:54 +04:00
FAIL_REGEX "ignoring unknown option" # MSVC
BUG: Fix compiler flag test for non-English MSVC (#11336) Approach suggested by John Stark.
2010-11-04 15:49:06 +03:00
FAIL_REGEX "warning D9002" # MSVC, any lang
Check{C,CXX}CompilerFlag: catch more Intel warning types (#12576) Patch provided by Szilárd Páll.
2012-04-17 00:37:01 +04:00
FAIL_REGEX "option.*not supported" # Intel
FAIL_REGEX "invalid argument .*option" # Intel
FAIL_REGEX "ignoring option .*argument required" # Intel
Fix CHECK_(C|CXX)_COMPILER_FLAG for HP This compiler warns and returns 0 for unrecognized flags. We fix the compiler flag check macros by looking for a warning in the output. See issue #9516.
2009-09-18 01:16:43 +04:00
FAIL_REGEX "[Uu]nknown option" # HP
Fix CHECK_(C|CXX)_COMPILER_FLAG for XL and SunPro These compilers warn and return 0 for unrecognized flags. We fix the compiler flag check macros by looking for a warning in the output. We also update the regex for GNU on older Macs. See issue #9516.
2009-09-18 17:49:44 +04:00
FAIL_REGEX "[Ww]arning: [Oo]ption" # SunPro
FAIL_REGEX "command option .* is not recognized" # XL
Improve checks for Open64 and g++ incompatible flags (#12119)
2012-02-12 13:42:54 +04:00
FAIL_REGEX "WARNING: unknown flag:" # Open64
Fix CHECK_(C|CXX)_COMPILER_FLAG for GNU and MSVC These compilers warn and return 0 for unrecognized flags. We fix the compiler flag check macros by looking for a warning in the output. See issue #9516.
2009-09-17 23:32:54 +04:00
)
Check{C,CXX}CompilerFlag: Test using C locale (#14102) Set the locale to C while running the compiler for these checks because we match the resulting warning messages in English only. Suggested-by: Marco Nolden <m.nolden@dkfz-heidelberg.de>
2013-04-22 16:50:08 +04:00
foreach(v ${_CheckCCompilerFlag_LOCALE_VARS})
set(ENV{${v}} ${_CheckCCompilerFlag_SAVED_${v}})
unset(_CheckCCompilerFlag_SAVED_${v})
endforeach()
unset(_CheckCCompilerFlag_LOCALE_VARS)
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 21:47:32 +04:00
set (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}")
Remove CMake-language block-end command arguments Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style. Run the following shell code: for c in else endif endforeach endfunction endmacro endwhile; do echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | egrep -z -v 'Tests/CMakeTests/While-Endwhile-' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 21:50:14 +04:00
endmacro ()