the-btfash-foundation/tmux-mem-cpu-load
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better c++11 detection

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2cc9efb187 (commitcomment-9327965)

Instead of checking for compiler version or whether it supports c++ features
through target_compile_features test whether compiler supports one of the c++11
flags (-std=c++11 or -std=c++0x). Cleaner and simplier code. And we can make it
fail loudly if comiler does not support c++11
This commit is contained in:
Pawel "l0ner" Soltys 2015-01-18 16:59:19 +01:00
parent ae4e160ede
commit b2084ea3b3
1 changed files with 16 additions and 26 deletions
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42
CMakeLists.txt
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@ -22,7 +22,6 @@ if(COMMAND cmake_policy)
endif(COMMAND cmake_policy)
### General Package stuff
project( tmux-mem-cpu-load )
set(tmux-mem-cpu-load_VERSION_MAJOR 2)
set(tmux-mem-cpu-load_VERSION_MINOR 3)
@ -31,10 +30,23 @@ set(tmux-mem-cpu-load_VERSION_PATCH 0)
set(tmux-mem-cpu-load_VERSION
${tmux-mem-cpu-load_VERSION_MAJOR}.${tmux-mem-cpu-load_VERSION_MINOR}.${tmux-mem-cpu-load_VERSION_PATCH})
# Check whether we have support for c++11 in compiler and fail if we don't
include(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
if(COMPILER_SUPPORTS_CXX11)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
elseif(COMPILER_SUPPORTS_CXX0X)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
else()
message(FATAL_ERROR "
Compiler ${CMAKE_CXX_COMPILER_ID} ${CMAKE_CXX_COMPILER_VERSION} has no C++11 support.")
endif()
# generate header file to handle version
configure_file(
"${PROJECT_SOURCE_DIR}/version.h.in"
"${PROJECT_SOURCE_DIR}/version.h"
"${PROJECT_SOURCE_DIR}/version.h.in" "${PROJECT_SOURCE_DIR}/version.h"
)
# set buold type
@ -70,33 +82,11 @@ endif()
# set common source files
SET( COMMON_SOURCES "tmux-mem-cpu-load.cpp" "graph.cc" "argParse/argParse.cc" )
# compiler flags
if (CMAKE_COMPILER_IS_GNUCC)
execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion
OUTPUT_VARIABLE GCC_VERSION)
if (GCC_VERSION VERSION_EQUAL 4.6)
set( GCC_COVERAGE_COMPILE_FLAGS "-std=c++0x " )
elseif (GCC_VERSION GREATER 4.6)
set( GCC_COVERAGE_COMPILE_FLAGS "-std=c++11 " )
else()
message( FATAL_ERROR "You need gcc version >= 4.6")
endif()
elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
set( GCC_COVERAGE_COMPILE_FLAGS "-std=c++11 " )
else()
message( WARNING "Untested compiler detected. You may need to set c++11
support manually through CMakeList.txt file")
set( GCC_COVERAGE_COMPILE_FLAGS "" )
endif()
set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GCC_COVERAGE_COMPILE_FLAGS}" )
# add binary tree so we find version.h
include_directories("${PROJECT_BINARY_DIR}" )
add_executable(tmux-mem-cpu-load ${COMMON_SOURCES} ${METER_SOURCES})
install(TARGETS tmux-mem-cpu-load
RUNTIME DESTINATION bin
)
install(TARGETS tmux-mem-cpu-load RUNTIME DESTINATION bin)
include( CTest )
if( BUILD_TESTING )