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compile_flags.cmake
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# Copyright (c) 2014, 2024, Oracle and/or its affiliates.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2.0,
# as published by the Free Software Foundation.
#
# This program is designed to work with certain software (including
# but not limited to OpenSSL) that is licensed under separate terms,
# as designated in a particular file or component or in included license
# documentation. The authors of MySQL hereby grant you an additional
# permission to link the program and your derivative works with the
# separately licensed software that they have either included with
# the program or referenced in the documentation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License, version 2.0, for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
## ADD_COMPILE_FLAGS(<source files> COMPILE_FLAGS <flags>)
## Use this for adding compiler flags to source files.
FUNCTION(ADD_COMPILE_FLAGS)
SET(FILES "")
SET(FLAGS "")
SET(COMPILE_FLAGS_SEEN)
FOREACH(ARG ${ARGV})
IF(ARG STREQUAL "COMPILE_FLAGS")
SET(COMPILE_FLAGS_SEEN 1)
ELSEIF(COMPILE_FLAGS_SEEN)
LIST(APPEND FLAGS ${ARG})
IF(${ARG} MATCHES "^-D")
MESSAGE(WARNING
"${ARG} should be in COMPILE_DEFINITIONS not COMPILE_FLAGS")
ENDIF()
ELSE()
LIST(APPEND FILES ${ARG})
ENDIF()
ENDFOREACH()
FOREACH(FILE ${FILES})
FOREACH(FLAG ${FLAGS})
GET_SOURCE_FILE_PROPERTY(PROP ${FILE} COMPILE_FLAGS)
IF(NOT PROP)
SET(PROP ${FLAG})
ELSE()
STRING_APPEND(PROP " ${FLAG}")
ENDIF()
SET_SOURCE_FILES_PROPERTIES(
${FILE} PROPERTIES COMPILE_FLAGS "${PROP}"
)
ENDFOREACH()
ENDFOREACH()
ENDFUNCTION(ADD_COMPILE_FLAGS)
## MY_ADD_COMPILE_DEFINITIONS(<source files> COMPILE_DEFINITIONS <flags>)
## Use this for adding preprocessor flags VAR or VAR=value to source files.
## cmake will prefix with '-D' and sort all COMPILE_DEFINITIONS alphabetically.
FUNCTION(MY_ADD_COMPILE_DEFINITIONS)
SET(FILES "")
SET(FLAGS "")
SET(COMPILE_DEFINITIONS_SEEN)
FOREACH(ARG ${ARGV})
IF(ARG STREQUAL "COMPILE_DEFINITIONS")
SET(COMPILE_DEFINITIONS_SEEN 1)
ELSEIF(COMPILE_DEFINITIONS_SEEN)
LIST(APPEND FLAGS ${ARG})
ELSE()
LIST(APPEND FILES ${ARG})
ENDIF()
ENDFOREACH()
FOREACH(FILE ${FILES})
GET_SOURCE_FILE_PROPERTY(DEFS ${FILE} COMPILE_DEFINITIONS)
IF(NOT DEFS)
SET(DEFS ${FLAGS})
ELSE()
LIST(APPEND DEFS ${FLAGS})
ENDIF()
SET_SOURCE_FILES_PROPERTIES(
${FILE} PROPERTIES COMPILE_DEFINITIONS "${DEFS}")
ENDFOREACH()
ENDFUNCTION(MY_ADD_COMPILE_DEFINITIONS)
# -flto[=n] or -flto=auto or -flto=jobserver
SET(MY_COMPILER_FLAG_FLTO " -flto(=[0-9a-z]+)?")
# Remove compiler flag/pattern from CMAKE_C_FLAGS or CMAKE_CXX_FLAGS
FUNCTION(REMOVE_CMAKE_COMPILER_FLAGS FLAG_VAR PATTERN)
STRING(REGEX REPLACE "${PATTERN}" "" ${FLAG_VAR} "${${FLAG_VAR}}")
SET(${FLAG_VAR} "${${FLAG_VAR}}" PARENT_SCOPE)
ENDFUNCTION()
# Set CMAKE_C_FLAGS and CMAKE_CXX_FLAGS to 'rpm --eval %optflags'
FUNCTION(ADD_LINUX_RPM_FLAGS)
EXECUTE_PROCESS(COMMAND ${MY_RPM} --eval %optflags
OUTPUT_VARIABLE RPM_EVAL_OPTFLAGS
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE RPM_EVAL_RESULT
)
IF(RPM_EVAL_RESULT EQUAL 0)
STRING_APPEND(CMAKE_C_FLAGS " ${RPM_EVAL_OPTFLAGS}")
STRING_APPEND(CMAKE_CXX_FLAGS " ${RPM_EVAL_OPTFLAGS}")
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}" PARENT_SCOPE)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" PARENT_SCOPE)
ELSE()
MESSAGE(FATAL_ERROR
"WITH_PACKAGE_FLAGS=on but rpm --eval %optflags failed")
ENDIF()
ENDFUNCTION(ADD_LINUX_RPM_FLAGS)
# Set CMAKE_C_FLAGS and CMAKE_CXX_FLAGS to
# dpkg-buildflags --get <lang>FLAGS CPPFLAGS
# Set CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS and
# CMAKE_SHARED_LINKER_FLAGS to
# dpkg-buildflags --get LDFLAGS
FUNCTION(ADD_LINUX_DEB_FLAGS)
FOREACH(flag CPPFLAGS CFLAGS CXXFLAGS LDFLAGS)
EXECUTE_PROCESS(COMMAND ${MY_DPKG_BUILDFLAGS} --get ${flag}
OUTPUT_VARIABLE GET_${flag}
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE GET_RESULT
)
IF(NOT GET_RESULT EQUAL 0)
MESSAGE(FATAL_ERROR
"WITH_PACKAGE_FLAGS=on but dpkg-buildflags --get failed")
ENDIF()
SET(CMAKE_C_FLAGS "${GET_CFLAGS} ${GET_CPPFLAGS}" PARENT_SCOPE)
SET(CMAKE_CXX_FLAGS "${GET_CXXFLAGS} ${GET_CPPFLAGS}" PARENT_SCOPE)
SET(CMAKE_EXE_LINKER_FLAGS "${GET_LDFLAGS}" PARENT_SCOPE)
SET(CMAKE_MODULE_LINKER_FLAGS "${GET_LDFLAGS}" PARENT_SCOPE)
SET(CMAKE_SHARED_LINKER_FLAGS "${GET_LDFLAGS}" PARENT_SCOPE)
ENDFOREACH()
ENDFUNCTION(ADD_LINUX_DEB_FLAGS)
# See if we can do "-fuse-ld=${LINKER}" for gcc/clang on Linux.
# If compilation/linking succeeds, we extend misc cmake LINKER_FLAGS,
# and set OUTPUT_RESULT to 1.
FUNCTION(CHECK_ALTERNATIVE_LINKER LINKER OUTPUT_RESULT)
CMAKE_PUSH_CHECK_STATE(RESET)
SET(CMAKE_REQUIRED_LIBRARIES "-fuse-ld=${LINKER}")
CHECK_C_SOURCE_COMPILES("int main() {}" C_LD_${LINKER}_RESULT)
CHECK_CXX_SOURCE_COMPILES("int main() {}" CXX_LD_${LINKER}_RESULT)
IF(C_LD_${LINKER}_RESULT AND CXX_LD_${LINKER}_RESULT)
FOREACH(flag
CMAKE_EXE_LINKER_FLAGS
CMAKE_MODULE_LINKER_FLAGS
CMAKE_SHARED_LINKER_FLAGS
)
STRING_APPEND(${flag} " -fuse-ld=${LINKER}")
SET(${flag} ${${flag}} PARENT_SCOPE)
ENDFOREACH()
SET(${OUTPUT_RESULT} 1 PARENT_SCOPE)
ELSE()
SET(${OUTPUT_RESULT} 0 PARENT_SCOPE)
MESSAGE(STATUS "Cannot use ${LINKER} on this platform")
ENDIF()
CMAKE_POP_CHECK_STATE()
ENDFUNCTION(CHECK_ALTERNATIVE_LINKER)
FUNCTION(EXCLUDE_FROM_MSVC_PGO TARGET_LIB)
# Exclude archive from PGO on Windows to avoid linker error LNK1248
IF(MSVC AND ((FPROFILE_GENERATE OR FPROFILE_USE)))
TARGET_COMPILE_OPTIONS(${TARGET_LIB} PRIVATE /GL-)
ENDIF()
ENDFUNCTION(EXCLUDE_FROM_MSVC_PGO)