# 191: type qualifier is meaningless on cast type
# 597: entity-kind "entity" will not be called for implicit or explicit conversions
# 2330: argument of type "type" is incompatible with parameter of type "type" (dropping qualifiers)
- set(warnCFLAGS "${warnCFLAGS} -wd1418 -wd191 -wd2196 -wd3179 -ww597 -ww2330")
+ # 11003: no IR in object file xxxx; was the source file compiled with xxxx
+ set(warnCFLAGS "${warnCFLAGS} -diag-disable=1418,191,2196,3179 -diag-warning=2330,597,11003")
endif()
set(warnCXXFLAGS "${warnCFLAGS} -Wall -Wextra -Wunused -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing")
endif()
# Configure LTO
-# NOTE, cmake 3.0 has a INTERPROCEDURAL_OPTIMIZATION target
-# property for this (http://www.cmake.org/cmake/help/v3.0/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html)
if(enable_lto) # User wants LTO. Try if we can do that
set(enable_lto OFF)
if(enable_compile_optimizations
- AND CMAKE_COMPILER_IS_GNUCC
AND (NOT enable_model-checking))
- # On windows, we need 4.8 or higher to enable lto because of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293
- # We are experiencing assertion failures even with 4.8 on MinGW.
- # Push the support forward: will see if 4.9 works when we test it.
- #
- # On Linux, we got the following with GCC 4.8.4 on Centos and Ubuntu
- # lto1: internal compiler error: in output_die, at dwarf2out.c:8478
- # Please submit a full bug report, with preprocessed source if appropriate.
- # So instead, we push the support forward
-
- if ( (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8.5")
+ if(CMAKE_VERSION VERSION_LESS "3.9")
+ if ( CMAKE_COMPILER_IS_GNUCC
+ AND (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8.5")
AND (LINKER_VERSION VERSION_GREATER "2.22"))
- set(enable_lto ON)
+ set(enable_lto ON)
+ endif()
+ else()
+ include(CheckIPOSupported)
+ check_ipo_supported(RESULT ipo LANGUAGES C CXX)
+ if(ipo)
+ set(enable_lto ON)
+ endif()
endif()
endif()
+
if(enable_lto)
message(STATUS "LTO seems usable.")
else()
message(STATUS "LTO disabled on the command line.")
endif()
if(enable_lto) # User wants LTO, and it seems usable. Go for it
- set(optCFLAGS "${optCFLAGS} -flto ")
- # See https://gcc.gnu.org/wiki/LinkTimeOptimizationFAQ#ar.2C_nm_and_ranlib:
+ set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
+ if(LTO_EXTRA_FLAG AND CMAKE_COMPILER_IS_GNUCC)
+ list(APPEND CMAKE_C_COMPILE_OPTIONS_IPO "-flto=${LTO_EXTRA_FLAG}")
+ list(APPEND CMAKE_CXX_COMPILE_OPTIONS_IPO "-flto=${LTO_EXTRA_FLAG}")
+ endif()
+
+ # Activate fat-lto-objects in case LD and gfortran differ too much.
+ # Only test with GNU as it's the only case I know (clang+gfortran+lld)
+ execute_process(COMMAND ${CMAKE_LINKER} -v OUTPUT_VARIABLE LINKER_ID ERROR_VARIABLE LINKER_ID)
+ string(REGEX MATCH "GNU" LINKER_ID "${LINKER_ID}")
+ if(${CMAKE_Fortran_COMPILER_ID} MATCHES "GNU"
+ AND NOT "${LINKER_ID}" MATCHES "GNU")
+ list(APPEND CMAKE_Fortran_COMPILE_OPTIONS_IPO "-ffat-lto-objects")
+ endif()
+
# "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:
set(CMAKE_C_FLAGS "${warnCFLAGS} ${CMAKE_C_FLAGS} ${optCFLAGS}")
set(CMAKE_CXX_FLAGS "${warnCXXFLAGS} ${CMAKE_CXX_FLAGS} ${optCFLAGS}")
-# Try to make Mac a bit more complient to open source standards
+# Try to make Mac a bit more compliant to open source standards
if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE")
endif()
set(TESH_OPTION "")
if(enable_coverage)
- find_program(GCOV_PATH gcov)
+ find_program(GCOV_PATH NAMES ENV{GCOV} gcov)
if(GCOV_PATH)
set(COVERAGE_COMMAND "${GCOV_PATH}" CACHE TYPE FILEPATH FORCE)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOVERAGE")
