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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()
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 ${FCOMMON_OPT}")
endif ()
endif ()
message(WARNING "CMake support is experimental. It does not yet support all build options and may not produce the same Makefiles that OpenBLAS ships with.")
include("${PROJECT_SOURCE_DIR}/cmake/utils.cmake")