CMake: use the COMPILE_OPTIONS property instead of CMAKE_CXX_FLAGS

Signed-off-by: David Wagner <[email protected]>

Author: dawagner

CMakeLists.txt

@@ -57,6 +57,10 @@ include(SetVersion.cmake)
 # call the wrapper
 list(INSERT CMAKE_MODULE_PATH 0 "${CMAKE_CURRENT_LIST_DIR}/cmake")
 
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_EXTENSIONS NO)
+set(CMAKE_CXX_STANDARD_REQUIRED YES)
+
 if(WIN32)
     # By default cmake adds a warning level.
     # Nevertheless a different level is wanted for this project.
@@ -76,15 +80,13 @@ if(WIN32)
     # and thus are not to be used by the client. A better fix would be to export
     # only public methods instead of the whole class, but they are too many to
     # do that. A separated plugin interface would fix that.
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4 /FIiso646.h -wd4127 -wd4251")
+    set_property(DIRECTORY PROPERTY COMPILE_OPTIONS /W4 /FIiso646.h -wd4127 -wd4251)
 
     # FIXME: Once we have removed all warnings on windows, add the /WX flags if
     # FATAL_WARNINGS is enabled
 else()
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Wextra -Wconversion -Wno-sign-conversion")
-    if(FATAL_WARNINGS)
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
-    endif()
+    set_property(DIRECTORY PROPERTY COMPILE_OPTIONS -Wall -Wextra -Wconversion -Wno-sign-conversion
+                 $<$<BOOL:FATAL_WARNINGS>:-Werror>)
 endif()
 
 # Hide symbols by default, then exposed symbols are the same in linux and windows
@@ -101,6 +103,8 @@ set(CMAKE_INCLUDE_CURRENT_DIR_IN_INTERFACE ON)
 
 include(ctest/CMakeLists.txt)
 
+# Since there is no directory-wide property for linker flags, we can't use
+# set_property for the link-time coverage flags.
 if(COVERAGE)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")

bindings/python/CMakeLists.txt

@@ -76,7 +76,7 @@ set_property(TARGET _PyPfw PROPERTY LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BIN
 # generated by swig generates warnings. We don't apply the FATAL_WARNING policy
 # here, since we consider this generated code as external.
 target_compile_definitions(_PyPfw PRIVATE SWIG_PYTHON_SILENT_MEMLEAK)
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error")
+target_compile_options(_PyPfw PRIVATE -Wno-error)
 
 
 # Find the python modules install path.

skeleton-subsystem/CMakeLists.txt

@@ -33,13 +33,17 @@ project(parameter-framework-plugins-skeleton)
 
 find_package(ParameterFramework REQUIRED)
 
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_EXTENSIONS NO)
+set(CMAKE_CXX_STANDARD_REQUIRED YES)
+
 if(WIN32)
     # Force include iso646.h to support alternative operator form (and, or, not...)
     # Such support is require by the standard and can be enabled with /Za
     # but doing so breaks compilation of windows headers...
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4 /FIiso646.h")
+    set_property(DIRECTORY PROPERTY COMPILE_OPTIONS /W4 /FIiso646.h)
 else()
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Werror -Wall -Wextra -Wconversion")
+    set_property(DIRECTORY PROPERTY COMPILE_OPTIONS -Werror -Wall -Wextra -Wconversion)
 endif()
 
 # Hide symbols by default, then exposed symbols are the same in linux and windows