Hi, we were having some problems with warnings and gcc versions so I
thought to write a macro that adds a flag to any string (typically
CMAKE_C_FLAGS)
ADD_CHECK_C_COMPILER_FLAG(CMAKE_C_FLAGS -Wno-unknown-pragmas)
...this is the macro.
macro(ADD_CHECK_C_COMPILER_FLAG
_CFLAGS
_FLAG)
include(CheckCCompilerFlag)
# odd workaround
set(CFLAG_TEST "CFLAG_TEST")
CHECK_C_COMPILER_FLAG("${_FLAG}" CFLAG_TEST)
if(CFLAG_TEST)
# message(STATUS "Using CFLAG: ${_FLAG}")
set(${_CFLAGS} "${${_CFLAGS}} ${_FLAG}")
else()
message(STATUS "Unsupported CFLAG: ${_FLAG}")
endif()
endmacro()
My question is why this is needed?
set(CFLAG_TEST "CFLAG_TEST")
CHECK_C_COMPILER_FLAG("${_FLAG}" CFLAG_TEST)
If I do this (as I see in other examples online)...
CHECK_C_COMPILER_FLAG("${_FLAG}" CFLAG_TEST)
This if check fails in CheckCSourceCompiles.cmake:28 ...
MACRO(CHECK_C_SOURCE_COMPILES SOURCE VAR)
IF("${VAR}" MATCHES "^${VAR}$")
This is confusing since from what I can tell CFLAG_TEST can be an
undefined variable.
Any idea whats going on?, CMake 2.8.3
--
- Campbell
_______________________________________________
Powered by www.kitware.com
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
Please keep messages on-topic and check the CMake FAQ at:
http://www.cmake.org/Wiki/CMake_FAQ
Follow this link to subscribe/unsubscribe:
http://www.cmake.org/mailman/listinfo/cmake
