## ## This file is in charge of setting our paranoid flags with regard to warnings and optimization. ## ## It is only used for gcc and clang. MSVC builds don't load this file. ## ## These flags do break some classical CMake tests, so you don't ## want to do so before the very end of the configuration. ## ## Other compiler flags (C/C++ standard version) are tested and set ## by the beginning of the configuration, directly in ~/CMakeList.txt set(warnCFLAGS "") set(optCFLAGS "") set(warnCXXFLAGS "") if(enable_compile_warnings) set(warnCFLAGS "-fno-common -Wall -Wunused -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing -Wno-format-nonliteral -Werror") if(CMAKE_COMPILER_IS_GNUCC) set(warnCFLAGS "${warnCFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes") endif() set(warnCXXFLAGS "${warnCFLAGS} -Wall -Wextra -Wunused -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing -Wno-format-nonliteral -Werror") if(CMAKE_COMPILER_IS_GNUCXX) set(warnCXXFLAGS "${warnCXXFLAGS} -Wclobbered -Wno-error=clobbered -Wno-unused-local-typedefs -Wno-error=attributes") endif() if (CMAKE_CXX_COMPILER_ID MATCHES "Clang") # don't care about class that become struct set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-mismatched-tags") endif() set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -Wall") set(CMAKE_JAVA_COMPILE_FLAGS "-Xlint") endif() # Activate the warnings on #if FOOBAR when FOOBAR has no value # It breaks on FreeBSD within Boost headers, so activate this only in Pure Hardcore debug mode. if(enable_maintainer_mode) set(warnCFLAGS "${warnCFLAGS} -Wundef") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wundef") endif() # Se the optimisation flags # NOTE, we should CMAKE_BUILD_TYPE for this if(enable_compile_optimizations) set(optCFLAGS "-O3 -funroll-loops -fno-strict-aliasing ") else() set(optCFLAGS "-O0 ") endif() if(enable_compile_optimizations AND CMAKE_COMPILER_IS_GNUCC AND (NOT enable_model-checking)) # This is redundant (already in -03): set(optCFLAGS "${optCFLAGS} -finline-functions ") endif() # Configure LTO # NOTE, cmake 3.0 has a INTERPROCEDURAL_OPTIMIZATION target # property for this (http://www.cmake.org/cmake/help/v3.0/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html) if(enable_lto) # User wants LTO. Try if we can do that set(enable_lto OFF) if(enable_compile_optimizations AND CMAKE_COMPILER_IS_GNUCC AND (NOT enable_model-checking)) if(WIN32) if (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8") # On windows, we need 4.8 or higher to enable lto because of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293 # # We are experiencing assertion failures even with 4.8 on MinGW. # Push the support forward: will see if 4.9 works when we test it. set(enable_lto ON) endif() elseif(LINKER_VERSION STRGREATER "2.22") set(enable_lto ON) endif() endif() if(enable_lto) message("-- LTO seems usable.") else() if(NOT enable_compile_optimizations) message("-- LTO disabled: Compile-time optimizations turned off.") else() if(enable_model-checking) message("-- LTO disabled when compiling with model-checking.") else() message("-- LTO does not seem usable -- try updating your build chain.") endif() endif() endif() else() message("-- LTO disabled on the command line.") endif() if(enable_lto) # User wants LTO, and it seems usable. Go for it set(optCFLAGS "${optCFLAGS} -flto ") # See https://gcc.gnu.org/wiki/LinkTimeOptimizationFAQ#ar.2C_nm_and_ranlib: # "Since version 4.9 gcc produces slim object files that only contain # the intermediate representation. In order to handle archives of # these objects you have to use the gcc wrappers: # gcc-ar, gcc-nm and gcc-ranlib." if(${CMAKE_C_COMPILER_ID} STREQUAL "GNU" AND CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8") set (CMAKE_AR gcc-ar) set (CMAKE_RANLIB gcc-ranlib) endif() endif() if(enable_model-checking AND enable_compile_optimizations) # Forget it, do not optimize the code (because it confuses the MC): set(optCFLAGS "-O0 ") # But you can still optimize this: foreach(s src/xbt/mmalloc/mm.c src/xbt/log.c src/xbt/xbt_log_appender_file.c src/xbt/xbt_log_layout_format.c src/xbt/xbt_log_layout_simple.c src/xbt/dict.c src/xbt/dict_elm.c src/xbt/dict_cursor.c src/xbt/dynar.c src/xbt/fifo.c src/xbt/heap.c src/xbt/swag.c src/xbt/str.c src/xbt/strbuff.c src/xbt/snprintf.c src/xbt/queue.c src/xbt/xbt_os_time.c src/xbt/xbt_os_thread.c src/xbt/backtrace_linux.c ${MC_SRC_BASE} ${MC_SRC}) set (mcCFLAGS "-O3 -funroll-loops -fno-strict-aliasing") if(CMAKE_COMPILER_IS_GNUCC) set (mcCFLAGS "${mcCFLAGS} -finline-functions") endif() set_source_files_properties(${s} PROPERTIES COMPILE_FLAGS ${mcCFLAGS}) endforeach() endif() if(NOT enable_debug) set(CMAKE_C_FLAGS "-DNDEBUG ${CMAKE_C_FLAGS}") set(CMAKE_CXX_FLAGS "-DNDEBUG ${CMAKE_CXX_FLAGS}") endif() set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${optCFLAGS} ${warnCFLAGS}") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${optCFLAGS} ${warnCXXFLAGS}") # Try to make Mac a bit more complient to open source standards if(CMAKE_SYSTEM_NAME MATCHES "Darwin") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE") endif() set(TESH_OPTION "") if(enable_coverage) find_program(GCOV_PATH gcov) if(GCOV_PATH) set(COVERAGE_COMMAND "${GCOV_PATH}" CACHE TYPE FILEPATH FORCE) set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOVERAGE") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprofile-arcs -ftest-coverage") set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage") set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fprofile-arcs -ftest-coverage") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage") set(TESH_OPTION --enable-coverage) add_definitions(-fprofile-arcs -ftest-coverage) endif() endif() if(NOT $ENV{CFLAGS} STREQUAL "") message(STATUS "Add CFLAGS: \"$ENV{CFLAGS}\" to CMAKE_C_FLAGS") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} $ENV{CFLAGS}") endif() if(NOT $ENV{CXXFLAGS} STREQUAL "") message(STATUS "Add CXXFLAGS: \"$ENV{CXXFLAGS}\" to CMAKE_CXX_FLAGS") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} $ENV{CXXFLAGS}") endif() if(NOT $ENV{LDFLAGS} STREQUAL "") message(STATUS "Add LDFLAGS: \"$ENV{LDFLAGS}\" to CMAKE_C_LINK_FLAGS") set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} $ENV{LDFLAGS}") endif() if(MINGW) # http://stackoverflow.com/questions/10452262/create-64-bit-jni-under-windows # We don't want to ship libgcc_s_seh-1.dll nor libstdc++-6.dll set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static-libgcc") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++") set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -static-libgcc") set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -static-libgcc -static-libstdc++") # JNI searches for stdcalls set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wl,--add-stdcall-alias") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--add-stdcall-alias") set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS} -Wl,--add-stdcall-alias") set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -Wl,--add-stdcall-alias") # Specify the data model that we are using (yeah it may help Java) if(ARCH_32_BITS) set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32") else() set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m64") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64") endif() endif()