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#-------------------------------------------------------------------------------
# GraphBLAS/cmake_modules/GraphBLAS_compiler_options.cmake
#-------------------------------------------------------------------------------
# SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0
#-------------------------------------------------------------------------------
# check which compiler is being used. If you need to make
# compiler-specific modifications, here is the place to do it.
if ( "${CMAKE_C_COMPILER_ID}" STREQUAL "GNU" )
# The -g option is useful for the Intel VTune tool, but it should be
# removed in production. Comment this line out if not in use:
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g" )
# cmake 2.8 workaround: gcc needs to be told to do C11.
# cmake 3.0 doesn't have this problem.
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wundef " )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-strict-aliasing " )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c11 -lm -Wno-pragmas " )
# operations may be carried out in higher precision
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fexcess-precision=fast " )
# faster single complex multiplication and division
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fcx-limited-range " )
# math functions do not need to report errno
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-math-errno " )
# integer operations wrap
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fwrapv " )
# check all warnings (uncomment for development only):
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wpedantic -Werror" )
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wpedantic" )
if ( CMAKE_C_COMPILER_VERSION VERSION_LESS 4.9 )
message ( FATAL_ERROR "gcc version must be at least 4.9" )
endif ( )
elseif ( "${CMAKE_C_COMPILER_ID}" STREQUAL "Intel" )
# options for icc: also needs -std=c11
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -diag-disable 10397,15552 " )
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -qopt-report=5 -qopt-report-phase=vec" )
# the -mp1 option is important for predictable floating-point results with
# the icc compiler. Without, ((float) 1.)/((float) 0.) produces NaN,
# instead of the correct result, Inf.
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c11 -mp1" )
# The -g option is useful for the Intel VTune tool, but it should be
# removed in production. Comment this line out if not in use:
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g" )
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -qopt-malloc-options=3" )
# check all warnings and remarks (uncomment for development only):
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -w3 -Wremarks -Werror " )
if ( CMAKE_C_COMPILER_VERSION VERSION_LESS 19.0 )
message ( FATAL_ERROR "icc version must be at least 19.0" )
endif ( )
elseif ( "${CMAKE_C_COMPILER_ID}" STREQUAL "IntelLLVM" )
# options for icx
elseif ( "${CMAKE_C_COMPILER_ID}" STREQUAL "Clang" )
# options for clang
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-pointer-sign " )
# check all warnings (uncomment for development only):
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall " )
if ( CMAKE_C_COMPILER_VERSION VERSION_LESS 3.3 )
message ( FATAL_ERROR "clang version must be at least 3.3" )
endif ( )
elseif ( "${CMAKE_C_COMPILER_ID}" STREQUAL "AppleClang" )
# options for Apple Clang
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g" )
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address" )
# set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=thread" )
elseif ( MSVC )
# options for MicroSoft Visual Studio
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /O2 -wd\"4244\" -wd\"4146\" -wd\"4018\" -wd\"4996\" -wd\"4047\" -wd\"4554\"" )
elseif ( "${CMAKE_C_COMPILER_ID}" STREQUAL "PGI" )
# options for PGI pgcc compiler. The compiler has a bug, and the
# -DPGI_COMPILER_BUG causes GraphBLAS to use a workaround.
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Mnoopenmp -noswitcherror -c11 -lm -DPGI_COMPILER_BUG" )
set ( CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -Mnoopenmp -D__GCC_ATOMIC_TEST_AND_SET_TRUEVAL=1 -noswitcherror --c++11 -lm -DPGI_COMPILER_BUG" )
endif ( )
if ( ${CMAKE_BUILD_TYPE} STREQUAL "Debug" )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_DEBUG}" )
else ( )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_RELEASE}" )
endif ( )
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