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add checks for ansi flags and not hard code them

This commit is contained in:
Bill Hoffman 2002-11-21 12:52:54 -05:00
parent b8a1b1e9e7
commit 9a6c95fcea
5 changed files with 47 additions and 4 deletions
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23
Modules/CMakeBackwardCompatibilityCXX.cmake
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@ -1,4 +1,27 @@
#
# check for some ANSI flags in the CXX compiler if it is not gnu
IF(NOT CMAKE_COMPILER_IS_GNUCXX)
INCLUDE(${CMAKE_ROOT}/Modules/TestCXXAcceptFlag.cmake)
SET(CMAKE_TRY_ANSI_CXX_FLAGS "")
IF(CMAKE_SYSTEM MATCHES "IRIX.*")
SET(CMAKE_TRY_ANSI_CXX_FLAGS "-LANG:std")
ENDIF(CMAKE_SYSTEM MATCHES "IRIX.*")
IF(CMAKE_SYSTEM MATCHES "OSF.*")
SET(CMAKE_TRY_ANSI_CXX_FLAGS "-std strict_ansi -nopure_cname")
ENDIF(CMAKE_SYSTEM MATCHES "OSF.*")
# if CMAKE_TRY_ANSI_CXX_FLAGS has something in it, see
# if the compiler accepts it
IF( CMAKE_TRY_ANSI_CXX_FLAGS MATCHES ".+")
CHECK_CXX_ACCEPTS_FLAG(${CMAKE_TRY_ANSI_CXX_FLAGS} CMAKE_CXX_ACCEPTS_FLAGS)
# if the compiler liked the flag then set CMAKE_ANSI_CXXFLAGS
# to the flag
IF(CMAKE_CXX_ACCEPTS_FLAGS)
SET(CMAKE_ANSI_CXXFLAGS ${CMAKE_TRY_ANSI_CXX_FLAGS})
ENDIF(CMAKE_CXX_ACCEPTS_FLAGS)
ENDIF( CMAKE_TRY_ANSI_CXX_FLAGS MATCHES ".+")
ENDIF(NOT CMAKE_COMPILER_IS_GNUCXX)
INCLUDE(${CMAKE_ROOT}/Modules/TestForANSIStreamHeaders.cmake)
INCLUDE(${CMAKE_ROOT}/Modules/CheckIncludeFileCXX.cmake)
INCLUDE(${CMAKE_ROOT}/Modules/TestForSTDNamespace.cmake)

4
Modules/DummyCXXFile.cxx Normal file
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@ -0,0 +1,4 @@
int main()
{
return 0;
}

1
Modules/Platform/IRIX64.cmake
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@ -6,7 +6,6 @@ SET(CMAKE_SHARED_LIBRARY_RUNTIME_FLAG_SEP "") # : or empty
IF(NOT CMAKE_COMPILER_IS_GNUCXX)
SET(CMAKE_CXX_CREATE_STATIC_LIBRARY
"<CMAKE_CXX_COMPILER> -ar -o <TARGET> <OBJECTS>")
SET(CMAKE_ANSI_CXXFLAGS -LANG:std)
SET (CMAKE_CXX_FLAGS_INIT "")
SET (CMAKE_CXX_FLAGS_DEBUG_INIT "-g")
SET (CMAKE_CXX_FLAGS_MINSIZEREL_INIT "-O3")

3
Modules/Platform/OSF1.cmake
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@ -21,6 +21,3 @@ IF(CMAKE_SYSTEM MATCHES "OSF1-V.*")
SET(CMAKE_SHARED_LIBRARY_RUNTIME_FLAG_SEP ":")
ENDIF(CMAKE_SYSTEM MATCHES "OSF1-V.*")
IF(NOT CMAKE_COMPILER_IS_GNUCXX)
SET(CMAKE_ANSI_CXXFLAGS "-std strict_ansi -nopure_cname")
ENDIF(NOT CMAKE_COMPILER_IS_GNUCXX)

20
Modules/TestCXXAcceptsFlag.cmake Normal file
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@ -0,0 +1,20 @@
#
# Check if the CXX compiler accepts a flag
#
# CHECK_FUNCTION_EXISTS - macro which checks if the function exists
# FLAG - the flags to try
# VARIABLE - variable to store the result
#
MACRO(CHECK_CXX_ACCEPTS_FLAG FLAGS VARIABLE)
MESSAGE(STATUS "Checking to see if CXX compiler acepts flag ${FLAGS}")
TRY_COMPILE(${VARIABLE}
${PROJECT_BINARY_DIR}
${CMAKE_ROOT}/Modules/DummyCXXFile.cxx
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${FLAGS}
OUTPUT_VARIABLE OUTPUT)
IF(NOT ${VARIABLE})
WRITE_FILE(${PROJECT_BINARY_DIR}/CMakeError.log
"Determining if the CXX compiler accepts the flag ${FLAGS} failed with the following output:\n" "${OUTPUT}\n" APPEND)
ENDIF(NOT ${VARIABLE})
ENDMACRO(CHECK_CXX_ACCEPTS_FLAG)