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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
This commit is contained in:
Alexander Neundorf 2006-09-18 17:55:22 -04:00
parent 8e3bb08b81
commit 86c63dca11
2 changed files with 42 additions and 0 deletions
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21
Modules/CheckCCompilerFlag.cmake Normal file
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# - Check whether the C compiler supports a given flag.
# CHECK_C_COMPILER_FLAG(FLAG VARIABLE)
#
# FLAG - the compiler flag
# VARIABLE - variable to store the result
# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
INCLUDE(CheckCSourceCompiles)
MACRO (CHECK_C_COMPILER_FLAG _FLAG _RESULT)
SET(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}")
SET(CMAKE_REQUIRED_DEFINITIONS "${_FLAG}")
CHECK_C_SOURCE_COMPILES("int main() { return 0;}" ${_RESULT})
SET (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}")
ENDMACRO (CHECK_C_COMPILER_FLAG)

21
Modules/CheckCXXCompilerFlag.cmake Normal file
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# - Check whether the CXX compiler supports a given flag.
# CHECK_CXX_COMPILER_FLAG(FLAG VARIABLE)
#
# FLAG - the compiler flag
# VARIABLE - variable to store the result
# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
INCLUDE(CheckCXXSourceCompiles)
MACRO (CHECK_CXX_COMPILER_FLAG _FLAG _RESULT)
SET(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}")
SET(CMAKE_REQUIRED_DEFINITIONS "${_FLAG}")
CHECK_CXX_SOURCE_COMPILES("int main() { return 0;}" ${_RESULT})
SET (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}")
ENDMACRO (CHECK_CXX_COMPILER_FLAG)