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cmake_minimum_required(VERSION 2.8)
project(CheckCXXCompilerFlag)
macro(TEST_FAIL value msg)
if (${value})
message (SEND_ERROR "Test fail:" ${msg} ${Out} )
endif ()
endmacro()
macro(TEST_PASS value msg)
if (NOT ${value})
message (SEND_ERROR "Test fail:" ${msg} ${Out} )
endif ()
endmacro()
if(CMAKE_COMPILER_IS_GNUCXX)
exec_program(${CMAKE_C_COMPILER} ARGS --version OUTPUT_VARIABLE _gcc_version_info)
string (REGEX MATCH "[345]\\.[0-9]\\.[0-9]" _gcc_version "${_gcc_version_info}")
# gcc on mac just reports: "gcc (GCC) 3.3 20030304 ..." without the
# patch level, handle this here:
if(NOT _gcc_version)
string (REGEX REPLACE ".*\\(GCC\\).* ([34]\\.[0-9]) .*" "\\1.0" _gcc_version "${_gcc_version_info}")
endif()
endif()
if(CMAKE_CXX_COMPILER_ID MATCHES Clang)
exec_program(${CMAKE_CXX_COMPILER} ARGS --version OUTPUT_VARIABLE _clang_version_info)
string (REGEX MATCH "version [345]\\.[0-9]" _clang_version "${_clang_version_info}")
endif()
message("Platform:\n WIN32: ${WIN32}\n UNIX: ${UNIX}\n APPLE: ${APPLE}\n MINGW: ${MINGW}\n CYGWIN: ${CYGWIN}\n"
" MSVC: ${MSVC}\n MSVC60: ${MSVC60}\n MSVC70: ${MSVC70}\n MSVC71: ${MSVC71}\n MSVC80: ${MSVC80}\n MSVC90: ${MSVC90}\n MSVC10: ${MSVC10}\n"
" GCC: ${_gcc_version}\n"
" Clang: ${_clang_version}\n"
)
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag(-fvisibility=hidden HAS_HIDDEN_VISIBILITY)
message("HAS_HIDDEN_VISIBILITY: ${HAS_HIDDEN_VISIBILITY}\n\nCOMPILE OUTPUT:\n${OUTPUT}")
if(CMAKE_COMPILER_IS_GNUCXX)
if(NOT WIN32)
# test_pass(HAS_HIDDEN_VISIBILITY "GCC should support hidden visibility, but does not.")
endif()
else()
message("Unhandled Platform")
endif()
#
# This is a no-op executable... If this test is going to fail, it fails during
# the configure step while cmake is configuring this CMakeLists.txt file...
#
file(WRITE
"${CMAKE_CURRENT_BINARY_DIR}/main.cxx"
"int main() { return 0; }
"
)
add_executable(
CheckCXXCompilerFlag
"${CMAKE_CURRENT_BINARY_DIR}/main.cxx"
)
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