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cmake: Use same default optimization level as Makefiles. 

The default optimization level might be overridden by default settings of cmake.
This commit is contained in:
Markus Mützel 2022-09-01 11:43:51 +02:00
parent 00534523ad
commit c1a5a71d1c
1 changed files with 35 additions and 0 deletions
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35
CMakeLists.txt
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@ -87,6 +87,41 @@ if(MSVC AND MSVC_STATIC_CRT)
endforeach() endforeach()
endif() endif()
# Set default optimization level
if (NOT MSVC)
# Check if user specified optimization level in COMMON_OPT flags.
string(REGEX MATCH "-O[0-9]|-Ofast|-Og|-Os" OPENBLAS_COMMON_OPT_OFLAGS
"${COMMON_OPT} ${CCOMMON_OPT} ${FCOMMON_OPT}")
string(TOUPPER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE)
if (NOT "${OPENBLAS_COMMON_OPT_OFLAGS}" STREQUAL "")
# Filter out optimization level from cmake's default flags.
# They would override the optimization level set in COMMON_OPTs.
set(CompilerLangs
C
CXX
Fortran
ASM
)
foreach(CompilerLang ${CompilerLangs})
string(REGEX REPLACE "-O[0-9]|-Ofast|-Og|-Os" ""
CMAKE_${CompilerLang}_FLAGS_${CMAKE_BUILD_TYPE}
"${CMAKE_${CompilerLang}_FLAGS_${CMAKE_BUILD_TYPE}}")
endforeach()
endif ()
# Prepend default optimization level to COMMON_OPTs.
# These flags might be overridden by cmake's default flags.
if ("${CMAKE_BUILD_TYPE}" STREQUAL "DEBUG")
set(COMMON_OPT "-Og ${COMMON_OPT}")
set(CCOMMON_OPT "-Og ${CCOMMON_OPT}")
set(FCOMMON_OPT "-Og ${FCOMMON_OPT}")
else ()
set(COMMON_OPT "-O2 ${COMMON_OPT}")
set(CCOMMON_OPT "-O2 ${CCOMMON_OPT}")
set(FCOMMON_OPT "-O2 ${FCOMMON_OPT}")
endif ()
endif ()
message(WARNING "CMake support is experimental. It does not yet support all build options and may not produce the same Makefiles that OpenBLAS ships with.") message(WARNING "CMake support is experimental. It does not yet support all build options and may not produce the same Makefiles that OpenBLAS ships with.")
include("${PROJECT_SOURCE_DIR}/cmake/utils.cmake") include("${PROJECT_SOURCE_DIR}/cmake/utils.cmake")