diff options
Diffstat (limited to 'cmake/Modules/CompilerRTUtils.cmake')
| -rw-r--r-- | cmake/Modules/CompilerRTUtils.cmake | 105 |
1 files changed, 102 insertions, 3 deletions
diff --git a/cmake/Modules/CompilerRTUtils.cmake b/cmake/Modules/CompilerRTUtils.cmake index ad9e70c0587a..78b6dceef887 100644 --- a/cmake/Modules/CompilerRTUtils.cmake +++ b/cmake/Modules/CompilerRTUtils.cmake @@ -1,3 +1,6 @@ +include(CMakePushCheckState) +include(CheckSymbolExists) + # Because compiler-rt spends a lot of time setting up custom compile flags, # define a handy helper function for it. The compile flags setting in CMake # has serious issues that make its syntax challenging at best. @@ -45,9 +48,14 @@ macro(append_string_if condition value) endif() endmacro() -macro(append_no_rtti_flag list) - append_list_if(COMPILER_RT_HAS_FNO_RTTI_FLAG -fno-rtti ${list}) - append_list_if(COMPILER_RT_HAS_GR_FLAG /GR- ${list}) +macro(append_rtti_flag polarity list) + if(polarity) + append_list_if(COMPILER_RT_HAS_FRTTI_FLAG -frtti ${list}) + append_list_if(COMPILER_RT_HAS_GR_FLAG /GR ${list}) + else() + append_list_if(COMPILER_RT_HAS_FNO_RTTI_FLAG -fno-rtti ${list}) + append_list_if(COMPILER_RT_HAS_GR_FLAG /GR- ${list}) + endif() endmacro() macro(append_have_file_definition filename varname list) @@ -67,3 +75,94 @@ macro(list_intersect output input1 input2) endif() endforeach() endmacro() + +# Takes ${ARGN} and puts only supported architectures in @out_var list. +function(filter_available_targets out_var) + set(archs ${${out_var}}) + foreach(arch ${ARGN}) + list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX) + if(NOT (ARCH_INDEX EQUAL -1) AND CAN_TARGET_${arch}) + list(APPEND archs ${arch}) + endif() + endforeach() + set(${out_var} ${archs} PARENT_SCOPE) +endfunction() + +function(check_compile_definition def argstring out_var) + if("${def}" STREQUAL "") + set(${out_var} TRUE PARENT_SCOPE) + return() + endif() + cmake_push_check_state() + set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${argstring}") + check_symbol_exists(${def} "" ${out_var}) + cmake_pop_check_state() +endfunction() + +# test_target_arch(<arch> <def> <target flags...>) +# Checks if architecture is supported: runs host compiler with provided +# flags to verify that: +# 1) <def> is defined (if non-empty) +# 2) simple file can be successfully built. +# If successful, saves target flags for this architecture. +macro(test_target_arch arch def) + set(TARGET_${arch}_CFLAGS ${ARGN}) + set(TARGET_${arch}_LINKFLAGS ${ARGN}) + set(argstring "") + foreach(arg ${ARGN}) + set(argstring "${argstring} ${arg}") + endforeach() + check_compile_definition("${def}" "${argstring}" HAS_${arch}_DEF) + if(NOT HAS_${arch}_DEF) + set(CAN_TARGET_${arch} FALSE) + elseif(TEST_COMPILE_ONLY) + try_compile_only(CAN_TARGET_${arch} ${TARGET_${arch}_CFLAGS}) + else() + set(argstring "${CMAKE_EXE_LINKER_FLAGS} ${argstring}") + try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE} + COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS}" + OUTPUT_VARIABLE TARGET_${arch}_OUTPUT + CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${argstring}") + endif() + if(${CAN_TARGET_${arch}}) + list(APPEND COMPILER_RT_SUPPORTED_ARCH ${arch}) + elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "${arch}" AND + COMPILER_RT_HAS_EXPLICIT_DEFAULT_TARGET_TRIPLE) + # Bail out if we cannot target the architecture we plan to test. + message(FATAL_ERROR "Cannot compile for ${arch}:\n${TARGET_${arch}_OUTPUT}") + endif() +endmacro() + +macro(detect_target_arch) + check_symbol_exists(__arm__ "" __ARM) + check_symbol_exists(__aarch64__ "" __AARCH64) + check_symbol_exists(__x86_64__ "" __X86_64) + check_symbol_exists(__i686__ "" __I686) + check_symbol_exists(__i386__ "" __I386) + check_symbol_exists(__mips__ "" __MIPS) + check_symbol_exists(__mips64__ "" __MIPS64) + check_symbol_exists(__s390x__ "" __S390X) + check_symbol_exists(__wasm32__ "" __WEBASSEMBLY32) + check_symbol_exists(__wasm64__ "" __WEBASSEMBLY64) + if(__ARM) + add_default_target_arch(arm) + elseif(__AARCH64) + add_default_target_arch(aarch64) + elseif(__X86_64) + add_default_target_arch(x86_64) + elseif(__I686) + add_default_target_arch(i686) + elseif(__I386) + add_default_target_arch(i386) + elseif(__MIPS64) # must be checked before __MIPS + add_default_target_arch(mips64) + elseif(__MIPS) + add_default_target_arch(mips) + elseif(__S390X) + add_default_target_arch(s390x) + elseif(__WEBASSEMBLY32) + add_default_target_arch(wasm32) + elseif(__WEBASSEMBLY64) + add_default_target_arch(wasm64) + endif() +endmacro() |