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CompilerFlagsHelpers.cmake
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154 lines (121 loc) · 6.27 KB
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# =============================================================================
# Copyright (C) 2016-2021 Blue Brain Project
#
# See top-level LICENSE file for details.
# =============================================================================
# ~~~
# CompilerFlagsHelpers.cmake
# set of Convenience functions for portable compiler flags
# ~~~
set(SUPPORTED_COMPILER_LANGUAGE_LIST "CXX")
# detect compiler
foreach(COMPILER_LANGUAGE ${SUPPORTED_COMPILER_LANGUAGE_LIST})
if(CMAKE_${COMPILER_LANGUAGE}_COMPILER_ID STREQUAL "XL")
set(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_XLC ON)
elseif(CMAKE_${COMPILER_LANGUAGE}_COMPILER_ID STREQUAL "Intel")
set(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_ICC ON)
elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
set(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_MSVC)
elseif(${CMAKE_${COMPILER_LANGUAGE}_COMPILER_ID} STREQUAL "Clang")
set(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_CLANG ON)
elseif(CMAKE_${COMPILER_LANGUAGE}_COMPILER_ID STREQUAL "GNU")
set(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_GCC ON)
elseif(CMAKE_${COMPILER_LANGUAGE}_COMPILER_ID STREQUAL "Cray")
set(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_CRAY ON)
endif()
endforeach()
foreach(COMPILER_LANGUAGE ${SUPPORTED_COMPILER_LANGUAGE_LIST})
# XLC compiler
if(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_XLC)
# ~~~
# XLC -qinfo=all is awfully verbose on any platforms that use the GNU STL
# Enable by default only the relevant one
# ~~~
set(CMAKE_${COMPILER_LANGUAGE}_WARNING_ALL "-qformat=all -qinfo=lan:trx:ret:zea:cmp:ret")
set(CMAKE_${COMPILER_LANGUAGE}_DEBUGINFO_FLAGS "-g")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_NONE "-O0")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_NORMAL "-O2")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_AGGRESSIVE "-O3")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_FASTEST "-O5")
set(CMAKE_${COMPILER_LANGUAGE}_STACK_PROTECTION "-qstackprotect")
set(CMAKE_${COMPILER_LANGUAGE}_POSITION_INDEPENDENT "-qpic=small")
set(CMAKE_${COMPILER_LANGUAGE}_VECTORIZE "-qhot")
set(ADDITIONAL_THREADSAFE_FLAGS "-qthreaded")
set(IGNORE_UNKNOWN_PRAGMA_FLAGS "-qsuppress=1506-224")
# Microsoft compiler
elseif(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_MSVC)
set(CMAKE_${COMPILER_LANGUAGE}_DEBUGINFO_FLAGS "-Zi")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_NONE "")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_NORMAL "-O2")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_AGGRESSIVE "-O2")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_FASTEST "-O2")
set(CMAKE_${COMPILER_LANGUAGE}_STACK_PROTECTION "-GS")
# enable by default on MSVC
set(CMAKE_${COMPILER_LANGUAGE}_POSITION_INDEPENDENT "")
# GCC
elseif(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_GCC)
set(CMAKE_${COMPILER_LANGUAGE}_WARNING_ALL "-Wall")
set(CMAKE_${COMPILER_LANGUAGE}_DEBUGINFO_FLAGS "-g")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_NONE "-O0")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_NORMAL "-O2")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_AGGRESSIVE "-O3")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_FASTEST "-Ofast -march=native")
set(CMAKE_${COMPILER_LANGUAGE}_STACK_PROTECTION "-fstack-protector")
set(CMAKE_${COMPILER_LANGUAGE}_POSITION_INDEPENDENT "-fPIC")
set(CMAKE_${COMPILER_LANGUAGE}_VECTORIZE "-ftree-vectorize")
set(IGNORE_UNKNOWN_PRAGMA_FLAGS "-Wno-unknown-pragmas")
if(CMAKE_${COMPILER_LANGUAGE}_COMPILER_VERSION VERSION_GREATER "4.7.0")
set(CMAKE_${COMPILER_LANGUAGE}_LINK_TIME_OPT "-flto")
endif()
if((CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "^ppc") OR (CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "^power"
))
# ppc arch do not support -march= syntax
set(CMAKE_${COMPILER_LANGUAGE}_GEN_NATIVE "-mcpu=native")
else()
set(CMAKE_${COMPILER_LANGUAGE}_GEN_NATIVE "-march=native")
endif()
# CLANG
elseif(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_CLANG)
set(CMAKE_${COMPILER_LANGUAGE}_WARNING_ALL "-Wall")
set(CMAKE_${COMPILER_LANGUAGE}_DEBUGINFO_FLAGS "-g")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_NONE "-O0")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_NORMAL "-O2")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_AGGRESSIVE "-O3")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_FASTEST "-Ofast -march=native")
set(CMAKE_${COMPILER_LANGUAGE}_STACK_PROTECTION "-fstack-protector")
set(CMAKE_${COMPILER_LANGUAGE}_POSITION_INDEPENDENT "-fPIC")
# Force same ld behavior as when called from gcc --as-needed forces the linker to check whether
# a dynamic library mentioned in the command line is actually needed by the objects being
# linked. Symbols needed in shared objects are already linked when building that library.
set(CMAKE_EXE_LINKER_FLAGS "-Wl,--as-needed ${CMAKE_EXE_LINKER_FLAGS}")
set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--as-needed ${CMAKE_SHARED_LINKER_FLAGS}")
# rest of the world
else()
set(CMAKE_${COMPILER_LANGUAGE}_WARNING_ALL "-Wall")
set(CMAKE_${COMPILER_LANGUAGE}_DEBUGINFO_FLAGS "-g")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_NONE "-O0")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_NORMAL "-O2")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_AGGRESSIVE "-O3")
set(CMAKE_${COMPILER_LANGUAGE}_OPT_FASTEST "-O3")
set(CMAKE_${COMPILER_LANGUAGE}_STACK_PROTECTION "")
set(CMAKE_${COMPILER_LANGUAGE}_POSITION_INDEPENDENT "-fPIC")
set(CMAKE_${COMPILER_LANGUAGE}_VECTORIZE "")
if(CMAKE_${COMPILER_LANGUAGE}_COMPILER_IS_ICC)
# unknown compiler flags produce error on Cray and hence just set this for intel now
set(IGNORE_UNKNOWN_PRAGMA_FLAGS "-Wno-unknown-pragmas")
# Intel O3 is extreme
set(CMAKE_${COMPILER_LANGUAGE}_OPT_AGGRESSIVE "-O2")
endif()
if(CMAKE_${COMPILER_LANGUAGE}_COMPILER_ID STREQUAL "PGI")
set(CMAKE_${COMPILER_LANGUAGE}_WARNING_ALL "")
endif()
endif()
endforeach()
# ===============================================================================
# Allow undefined reference in shared library as mod files will be linked later
# ===============================================================================
if(CMAKE_CXX_COMPILER_ID MATCHES "AppleClang" OR ${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
set(UNDEFINED_SYMBOLS_IGNORE_FLAG "-undefined dynamic_lookup")
string(APPEND CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS " ${UNDEFINED_SYMBOLS_IGNORE_FLAG}")
string(APPEND CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS " ${UNDEFINED_SYMBOLS_IGNORE_FLAG}")
endif()