# 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 "${warnCFLAGS} -Wall -Wextra -Wunused -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing")
endif()
# Configure LTO
-# NOTE, cmake 3.0 has a INTERPROCEDURAL_OPTIMIZATION target
-# property for this (http://www.cmake.org/cmake/help/v3.0/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html)
if(enable_lto) # User wants LTO. Try if we can do that
set(enable_lto OFF)
if(enable_compile_optimizations
- AND CMAKE_COMPILER_IS_GNUCC
AND (NOT enable_model-checking))
- # On windows, we need 4.8 or higher to enable lto because of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293
- # We are experiencing assertion failures even with 4.8 on MinGW.
- # Push the support forward: will see if 4.9 works when we test it.
- #
- # On Linux, we got the following with GCC 4.8.4 on Centos and Ubuntu
- # lto1: internal compiler error: in output_die, at dwarf2out.c:8478
- # Please submit a full bug report, with preprocessed source if appropriate.
- # So instead, we push the support forward
-
- if ( (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8.5")
+ if(CMAKE_VERSION VERSION_LESS "3.9")
+ if ( CMAKE_COMPILER_IS_GNUCC
+ AND (CMAKE_C_COMPILER_VERSION VERSION_GREATER "4.8.5")
AND (LINKER_VERSION VERSION_GREATER "2.22"))
- set(enable_lto ON)
+ set(enable_lto ON)
+ endif()
+ else()
+ include(CheckIPOSupported)
+ check_ipo_supported(RESULT ipo)
+ if(ipo)
+ set(enable_lto ON)
+ endif()
endif()
endif()
+
if(enable_lto)
message(STATUS "LTO seems usable.")
else()
message(STATUS "LTO disabled on the command line.")
endif()
if(enable_lto) # User wants LTO, and it seems usable. Go for it
- set(optCFLAGS "${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()
# "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: