some unecessary lines have been removed and a new target has been added:...

some unecessary lines have been removed and a new target has been added: cxxflags. This only takes compiling options from the cxxflags env variable and is therefore suitable for packagers who need to force their own compiling flags.

CMakeLists.txt

@@ -95,7 +95,7 @@ ELSE(UNIX)
 ENDIF(UNIX)
 
 IF(NOT CMAKE_BUILD_TYPE)
-	SET(CMAKE_BUILD_TYPE "release" CACHE STRING "Choose the type of build, options are: debug release coverage " FORCE)
+	SET(CMAKE_BUILD_TYPE "release" CACHE STRING "Choose the type of build, options are: debug release coverage cxxflags" FORCE)
 	SET(CMAKE_CONFIGURATION_TYPES ${CMAKE_BUILD_TYPE})
 ENDIF(NOT CMAKE_BUILD_TYPE)
 
@@ -130,12 +130,11 @@ IF(POPC)
 	SET(POPC_FLAGS "-cxxmain")
 ENDIF(POPC)
 
-SET(CMAKE_CXX_FLAGS "${POPC_FLAGS} ${_VERSION} ${ARCH} ${CFLAGS} ${PLATFORM}" CACHE STRING "" FORCE)
+SET(CMAKE_CXX_FLAGS "${POPC_FLAGS} ${_VERSION} ${ARCH} ${PLATFORM}" CACHE STRING "" FORCE)
 SET(CMAKE_CXX_FLAGS_RELEASE "${OPTIM}" CACHE STRING "" FORCE)
 SET(CMAKE_CXX_FLAGS_DEBUG "${DEBUG} ${WARNINGS} ${EXTRA_WARNINGS}" CACHE STRING "" FORCE)
-
-MESSAGE(STATUS "DEBUG CXXFLAGS  : ${CMAKE_CXX_FLAGS_DEBUG}")
-MESSAGE(STATUS "RELEASE CXXFLAGS: ${CMAKE_CXX_FLAGS_RELEASE}")
+SET(CMAKE_CXX_FLAGS_CXXFLAGS "$ENV{CXXFLAGS}" CACHE STRING "" FORCE)
+MARK_AS_ADVANCED(FORCE CMAKE_CXX_FLAGS_CXXFLAGS)
 
 #Add subdirectory, so they can inherit all variables defined above
 ADD_SUBDIRECTORY(meteoio/plugins)
@@ -394,8 +393,7 @@ IF(BUILD_TESTING)
 			# force the correct flags to make coverage trought a build type
 			SET(CMAKE_BUILD_TYPE coverage)
 			SET(CMAKE_CXX_FLAGS_COVERAGE "-Wall -O0 -ftest-coverage -fprofile-arcs" CACHE STRING "" FORCE)
-			SET(CMAKE_C_FLAGS_COVERAGE "-Wall -O0 -ftest-coverage -fprofile-arcs" CACHE STRING "" FORCE)
-			MARK_AS_ADVANCED(FORCE CMAKE_CXX_FLAGS_COVERAGE CMAKE_C_FLAGS_COVERAGE)
+			MARK_AS_ADVANCED(FORCE CMAKE_CXX_FLAGS_COVERAGE)
 
 			# Force debug mode, so that no optimisation is made to get "Correct" results of coverage testing
 			SET(CMAKE_BUILD_TYPE "coverage" CACHE STRING "Choose the type of build, options are: debug release coverage " FORCE)