| # This CMake module is responsible for interpreting the user defined LLVM_ |
| # options and executing the appropriate CMake commands to realize the users' |
| # selections. |
| |
| # This is commonly needed so make sure it's defined before we include anything |
| # else. |
| string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) |
| |
| include(CheckCompilerVersion) |
| include(HandleLLVMStdlib) |
| include(CheckCCompilerFlag) |
| include(CheckCXXCompilerFlag) |
| include(CheckSymbolExists) |
| include(CMakeDependentOption) |
| include(LLVMProcessSources) |
| |
| if(CMAKE_LINKER MATCHES ".*lld" OR (LLVM_USE_LINKER STREQUAL "lld" OR LLVM_ENABLE_LLD)) |
| set(LINKER_IS_LLD TRUE) |
| else() |
| set(LINKER_IS_LLD FALSE) |
| endif() |
| |
| if(CMAKE_LINKER MATCHES "lld-link" OR (MSVC AND (LLVM_USE_LINKER STREQUAL "lld" OR LLVM_ENABLE_LLD))) |
| set(LINKER_IS_LLD_LINK TRUE) |
| else() |
| set(LINKER_IS_LLD_LINK FALSE) |
| endif() |
| |
| set(LLVM_ENABLE_LTO OFF CACHE STRING "Build LLVM with LTO. May be specified as Thin or Full to use a particular kind of LTO") |
| string(TOUPPER "${LLVM_ENABLE_LTO}" uppercase_LLVM_ENABLE_LTO) |
| |
| # Ninja Job Pool support |
| # The following only works with the Ninja generator in CMake >= 3.0. |
| set(LLVM_PARALLEL_COMPILE_JOBS "" CACHE STRING |
| "Define the maximum number of concurrent compilation jobs (Ninja only).") |
| if(LLVM_PARALLEL_COMPILE_JOBS) |
| if(NOT CMAKE_GENERATOR STREQUAL "Ninja") |
| message(WARNING "Job pooling is only available with Ninja generators.") |
| else() |
| set_property(GLOBAL APPEND PROPERTY JOB_POOLS compile_job_pool=${LLVM_PARALLEL_COMPILE_JOBS}) |
| set(CMAKE_JOB_POOL_COMPILE compile_job_pool) |
| endif() |
| endif() |
| |
| set(LLVM_PARALLEL_LINK_JOBS "" CACHE STRING |
| "Define the maximum number of concurrent link jobs (Ninja only).") |
| if(CMAKE_GENERATOR STREQUAL "Ninja") |
| if(NOT LLVM_PARALLEL_LINK_JOBS AND uppercase_LLVM_ENABLE_LTO STREQUAL "THIN") |
| message(STATUS "ThinLTO provides its own parallel linking - limiting parallel link jobs to 2.") |
| set(LLVM_PARALLEL_LINK_JOBS "2") |
| endif() |
| if(LLVM_PARALLEL_LINK_JOBS) |
| set_property(GLOBAL APPEND PROPERTY JOB_POOLS link_job_pool=${LLVM_PARALLEL_LINK_JOBS}) |
| set(CMAKE_JOB_POOL_LINK link_job_pool) |
| endif() |
| elseif(LLVM_PARALLEL_LINK_JOBS) |
| message(WARNING "Job pooling is only available with Ninja generators.") |
| endif() |
| |
| if( LLVM_ENABLE_ASSERTIONS ) |
| # MSVC doesn't like _DEBUG on release builds. See PR 4379. |
| if( NOT MSVC ) |
| add_definitions( -D_DEBUG ) |
| endif() |
| # On non-Debug builds cmake automatically defines NDEBUG, so we |
| # explicitly undefine it: |
| if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" ) |
| # NOTE: use `add_compile_options` rather than `add_definitions` since |
| # `add_definitions` does not support generator expressions. |
| add_compile_options($<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:-UNDEBUG>) |
| if (MSVC) |
| # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines. |
| foreach (flags_var_to_scrub |
| CMAKE_CXX_FLAGS_RELEASE |
| CMAKE_CXX_FLAGS_RELWITHDEBINFO |
| CMAKE_CXX_FLAGS_MINSIZEREL |
| CMAKE_C_FLAGS_RELEASE |
| CMAKE_C_FLAGS_RELWITHDEBINFO |
| CMAKE_C_FLAGS_MINSIZEREL) |
| string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " " |
| "${flags_var_to_scrub}" "${${flags_var_to_scrub}}") |
| endforeach() |
| endif() |
| endif() |
| endif() |
| |
| if(LLVM_ENABLE_EXPENSIVE_CHECKS) |
| add_definitions(-DEXPENSIVE_CHECKS) |
| |
| # In some libstdc++ versions, std::min_element is not constexpr when |
| # _GLIBCXX_DEBUG is enabled. |
| CHECK_CXX_SOURCE_COMPILES(" |
| #define _GLIBCXX_DEBUG |
| #include <algorithm> |
| int main(int argc, char** argv) { |
| static constexpr int data[] = {0, 1}; |
| constexpr const int* min_elt = std::min_element(&data[0], &data[2]); |
| return 0; |
| }" CXX_SUPPORTS_GLIBCXX_DEBUG) |
| if(CXX_SUPPORTS_GLIBCXX_DEBUG) |
| add_definitions(-D_GLIBCXX_DEBUG) |
| else() |
| add_definitions(-D_GLIBCXX_ASSERTIONS) |
| endif() |
| endif() |
| |
| if (LLVM_ENABLE_STRICT_FIXED_SIZE_VECTORS) |
| add_definitions(-DSTRICT_FIXED_SIZE_VECTORS) |
| endif() |
| |
| string(TOUPPER "${LLVM_ABI_BREAKING_CHECKS}" uppercase_LLVM_ABI_BREAKING_CHECKS) |
| |
| if( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "WITH_ASSERTS" ) |
| if( LLVM_ENABLE_ASSERTIONS ) |
| set( LLVM_ENABLE_ABI_BREAKING_CHECKS 1 ) |
| endif() |
| elseif( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "FORCE_ON" ) |
| set( LLVM_ENABLE_ABI_BREAKING_CHECKS 1 ) |
| elseif( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "FORCE_OFF" ) |
| # We don't need to do anything special to turn off ABI breaking checks. |
| elseif( NOT DEFINED LLVM_ABI_BREAKING_CHECKS ) |
| # Treat LLVM_ABI_BREAKING_CHECKS like "FORCE_OFF" when it has not been |
| # defined. |
| else() |
| message(FATAL_ERROR "Unknown value for LLVM_ABI_BREAKING_CHECKS: \"${LLVM_ABI_BREAKING_CHECKS}\"!") |
| endif() |
| |
| if( LLVM_REVERSE_ITERATION ) |
| set( LLVM_ENABLE_REVERSE_ITERATION 1 ) |
| endif() |
| |
| if(WIN32) |
| set(LLVM_HAVE_LINK_VERSION_SCRIPT 0) |
| if(CYGWIN) |
| set(LLVM_ON_WIN32 0) |
| set(LLVM_ON_UNIX 1) |
| else(CYGWIN) |
| set(LLVM_ON_WIN32 1) |
| set(LLVM_ON_UNIX 0) |
| endif(CYGWIN) |
| else(WIN32) |
| if(FUCHSIA OR UNIX) |
| set(LLVM_ON_WIN32 0) |
| set(LLVM_ON_UNIX 1) |
| if(APPLE OR ${CMAKE_SYSTEM_NAME} MATCHES "AIX") |
| set(LLVM_HAVE_LINK_VERSION_SCRIPT 0) |
| else() |
| set(LLVM_HAVE_LINK_VERSION_SCRIPT 1) |
| endif() |
| else(FUCHSIA OR UNIX) |
| MESSAGE(SEND_ERROR "Unable to determine platform") |
| endif(FUCHSIA OR UNIX) |
| endif(WIN32) |
| |
| if (CMAKE_SYSTEM_NAME MATCHES "OS390") |
| set(LLVM_HAVE_LINK_VERSION_SCRIPT 0) |
| endif() |
| |
| set(EXEEXT ${CMAKE_EXECUTABLE_SUFFIX}) |
| set(LTDL_SHLIB_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX}) |
| |
| # We use *.dylib rather than *.so on darwin, but we stick with *.so on AIX. |
| if(${CMAKE_SYSTEM_NAME} MATCHES "AIX") |
| set(LLVM_PLUGIN_EXT ${CMAKE_SHARED_MODULE_SUFFIX}) |
| else() |
| set(LLVM_PLUGIN_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX}) |
| endif() |
| |
| if(APPLE) |
| # Darwin-specific linker flags for loadable modules. |
| set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-flat_namespace -Wl,-undefined -Wl,suppress") |
| endif() |
| |
| if(${CMAKE_SYSTEM_NAME} MATCHES "Linux") |
| # RHEL7 has ar and ranlib being non-deterministic by default. The D flag forces determinism, |
| # however only GNU version of ar and ranlib (2.27) have this option. |
| # RHEL DTS7 is also affected by this, which uses GNU binutils 2.28 |
| execute_process(COMMAND ${CMAKE_AR} rD t.a |
| WORKING_DIRECTORY ${CMAKE_BINARY_DIR} |
| RESULT_VARIABLE AR_RESULT |
| OUTPUT_QUIET |
| ERROR_QUIET |
| ) |
| if(${AR_RESULT} EQUAL 0) |
| execute_process(COMMAND ${CMAKE_RANLIB} -D t.a |
| WORKING_DIRECTORY ${CMAKE_BINARY_DIR} |
| RESULT_VARIABLE RANLIB_RESULT |
| OUTPUT_QUIET |
| ERROR_QUIET |
| ) |
| if(${RANLIB_RESULT} EQUAL 0) |
| set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> Dqc <TARGET> <LINK_FLAGS> <OBJECTS>") |
| set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> Dq <TARGET> <LINK_FLAGS> <OBJECTS>") |
| set(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> -D <TARGET>") |
| |
| set(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> Dqc <TARGET> <LINK_FLAGS> <OBJECTS>") |
| set(CMAKE_CXX_ARCHIVE_APPEND "<CMAKE_AR> Dq <TARGET> <LINK_FLAGS> <OBJECTS>") |
| set(CMAKE_CXX_ARCHIVE_FINISH "<CMAKE_RANLIB> -D <TARGET>") |
| endif() |
| file(REMOVE ${CMAKE_BINARY_DIR}/t.a) |
| endif() |
| endif() |
| |
| if(${CMAKE_SYSTEM_NAME} MATCHES "AIX") |
| # -fPIC does not enable the large code model for GCC on AIX but does for XL. |
| if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang") |
| append("-mcmodel=large" CMAKE_CXX_FLAGS CMAKE_C_FLAGS) |
| elseif(CMAKE_CXX_COMPILER_ID MATCHES "XL") |
| # XL generates a small number of relocations not of the large model, -bbigtoc is needed. |
| append("-Wl,-bbigtoc" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| # The default behaviour on AIX processes dynamic initialization of non-local variables with |
| # static storage duration even for archive members that are otherwise unreferenced. |
| # Since `--whole-archive` is not used by the LLVM build to keep such initializations for Linux, |
| # we can limit the processing for archive members to only those that are otherwise referenced. |
| append("-bcdtors:mbr" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| if(BUILD_SHARED_LIBS) |
| # See rpath handling in AddLLVM.cmake |
| # FIXME: Remove this warning if this rpath is no longer hardcoded. |
| message(WARNING "Build and install environment path info may be exposed; binaries will also be unrelocatable.") |
| endif() |
| endif() |
| |
| # Pass -Wl,-z,defs. This makes sure all symbols are defined. Otherwise a DSO |
| # build might work on ELF but fail on MachO/COFF. |
| if(NOT (CMAKE_SYSTEM_NAME MATCHES "Darwin|FreeBSD|OpenBSD|DragonFly|AIX|SunOS|OS390" OR |
| WIN32 OR CYGWIN) AND |
| NOT LLVM_USE_SANITIZER) |
| set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-z,defs") |
| endif() |
| |
| # Pass -Wl,-z,nodelete. This makes sure our shared libraries are not unloaded |
| # by dlclose(). We need that since the CLI API relies on cross-references |
| # between global objects which became horribly broken when one of the libraries |
| # is unloaded. |
| if(${CMAKE_SYSTEM_NAME} MATCHES "Linux") |
| set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-z,nodelete") |
| set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-z,nodelete") |
| endif() |
| |
| |
| function(append value) |
| foreach(variable ${ARGN}) |
| set(${variable} "${${variable}} ${value}" PARENT_SCOPE) |
| endforeach(variable) |
| endfunction() |
| |
| function(append_if condition value) |
| if (${condition}) |
| foreach(variable ${ARGN}) |
| set(${variable} "${${variable}} ${value}" PARENT_SCOPE) |
| endforeach(variable) |
| endif() |
| endfunction() |
| |
| macro(add_flag_if_supported flag name) |
| check_c_compiler_flag("-Werror ${flag}" "C_SUPPORTS_${name}") |
| append_if("C_SUPPORTS_${name}" "${flag}" CMAKE_C_FLAGS) |
| check_cxx_compiler_flag("-Werror ${flag}" "CXX_SUPPORTS_${name}") |
| append_if("CXX_SUPPORTS_${name}" "${flag}" CMAKE_CXX_FLAGS) |
| endmacro() |
| |
| function(add_flag_or_print_warning flag name) |
| check_c_compiler_flag("-Werror ${flag}" "C_SUPPORTS_${name}") |
| check_cxx_compiler_flag("-Werror ${flag}" "CXX_SUPPORTS_${name}") |
| if (C_SUPPORTS_${name} AND CXX_SUPPORTS_${name}) |
| message(STATUS "Building with ${flag}") |
| set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE) |
| set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" PARENT_SCOPE) |
| set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} ${flag}" PARENT_SCOPE) |
| else() |
| message(WARNING "${flag} is not supported.") |
| endif() |
| endfunction() |
| |
| if( LLVM_ENABLE_LLD ) |
| if ( LLVM_USE_LINKER ) |
| message(FATAL_ERROR "LLVM_ENABLE_LLD and LLVM_USE_LINKER can't be set at the same time") |
| endif() |
| # In case of MSVC cmake always invokes the linker directly, so the linker |
| # should be specified by CMAKE_LINKER cmake variable instead of by -fuse-ld |
| # compiler option. |
| if ( NOT MSVC ) |
| set(LLVM_USE_LINKER "lld") |
| endif() |
| endif() |
| |
| if( LLVM_USE_LINKER ) |
| set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) |
| set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fuse-ld=${LLVM_USE_LINKER}") |
| check_cxx_source_compiles("int main() { return 0; }" CXX_SUPPORTS_CUSTOM_LINKER) |
| if ( NOT CXX_SUPPORTS_CUSTOM_LINKER ) |
| message(FATAL_ERROR "Host compiler does not support '-fuse-ld=${LLVM_USE_LINKER}'") |
| endif() |
| set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) |
| append("-fuse-ld=${LLVM_USE_LINKER}" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| |
| if( LLVM_ENABLE_PIC ) |
| if( XCODE ) |
| # Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't |
| # know how to disable this, so just force ENABLE_PIC off for now. |
| message(WARNING "-fPIC not supported with Xcode.") |
| elseif( WIN32 OR CYGWIN) |
| # On Windows all code is PIC. MinGW warns if -fPIC is used. |
| else() |
| add_flag_or_print_warning("-fPIC" FPIC) |
| # Enable interprocedural optimizations for non-inline functions which would |
| # otherwise be disabled due to GCC -fPIC's default. |
| # Note: GCC<10.3 has a bug on SystemZ. |
| # |
| # Note: Clang allows IPO for -fPIC so this optimization is less effective. |
| # Older Clang may support -fno-semantic-interposition but it used local |
| # aliases to optimize global variables, which is incompatible with copy |
| # relocations due to -fno-pic. |
| if ((CMAKE_COMPILER_IS_GNUCXX AND |
| NOT (LLVM_NATIVE_ARCH STREQUAL "SystemZ" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 10.3)) |
| OR (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_COMPILER_VERSION GREATER_EQUAL 13)) |
| add_flag_if_supported("-fno-semantic-interposition" FNO_SEMANTIC_INTERPOSITION) |
| endif() |
| endif() |
| # GCC for MIPS can miscompile LLVM due to PR37701. |
| if(CMAKE_COMPILER_IS_GNUCXX AND LLVM_NATIVE_ARCH STREQUAL "Mips" AND |
| NOT Uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG") |
| add_flag_or_print_warning("-fno-shrink-wrap" FNO_SHRINK_WRAP) |
| endif() |
| # gcc with -O3 -fPIC generates TLS sequences that violate the spec on |
| # Solaris/sparcv9, causing executables created with the system linker |
| # to SEGV (GCC PR target/96607). |
| # clang with -O3 -fPIC generates code that SEGVs. |
| # Both can be worked around by compiling with -O instead. |
| if(${CMAKE_SYSTEM_NAME} STREQUAL "SunOS" AND LLVM_NATIVE_ARCH STREQUAL "Sparc") |
| llvm_replace_compiler_option(CMAKE_CXX_FLAGS_RELEASE "-O[23]" "-O") |
| llvm_replace_compiler_option(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O[23]" "-O") |
| endif() |
| endif() |
| |
| if(NOT WIN32 AND NOT CYGWIN AND NOT (${CMAKE_SYSTEM_NAME} MATCHES "AIX")) |
| # MinGW warns if -fvisibility-inlines-hidden is used. |
| # GCC on AIX warns if -fvisibility-inlines-hidden is used and Clang on AIX doesn't currently support visibility. |
| check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG) |
| append_if(SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG "-fvisibility-inlines-hidden" CMAKE_CXX_FLAGS) |
| endif() |
| |
| if(CMAKE_SIZEOF_VOID_P EQUAL 8 AND MINGW) |
| add_definitions( -D_FILE_OFFSET_BITS=64 ) |
| endif() |
| |
| if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 ) |
| # TODO: support other platforms and toolchains. |
| if( LLVM_BUILD_32_BITS ) |
| message(STATUS "Building 32 bits executables and libraries.") |
| set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32") |
| set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32") |
| set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -m32") |
| set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m32") |
| set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -m32") |
| |
| # FIXME: CMAKE_SIZEOF_VOID_P is still 8 |
| add_definitions(-D_LARGEFILE_SOURCE) |
| add_definitions(-D_FILE_OFFSET_BITS=64) |
| endif( LLVM_BUILD_32_BITS ) |
| endif( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 ) |
| |
| # If building on a GNU specific 32-bit system, make sure off_t is 64 bits |
| # so that off_t can stored offset > 2GB. |
| # Android until version N (API 24) doesn't support it. |
| if (ANDROID AND (ANDROID_NATIVE_API_LEVEL LESS 24)) |
| set(LLVM_FORCE_SMALLFILE_FOR_ANDROID TRUE) |
| endif() |
| if( CMAKE_SIZEOF_VOID_P EQUAL 4 AND NOT LLVM_FORCE_SMALLFILE_FOR_ANDROID) |
| # FIXME: It isn't handled in LLVM_BUILD_32_BITS. |
| add_definitions( -D_LARGEFILE_SOURCE ) |
| add_definitions( -D_FILE_OFFSET_BITS=64 ) |
| endif() |
| |
| if( XCODE ) |
| # For Xcode enable several build settings that correspond to |
| # many warnings that are on by default in Clang but are |
| # not enabled for historical reasons. For versions of Xcode |
| # that do not support these options they will simply |
| # be ignored. |
| set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_ABOUT_RETURN_TYPE "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_ABOUT_MISSING_NEWLINE "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_VALUE "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_VARIABLE "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_SIGN_COMPARE "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_FUNCTION "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_HIDDEN_VIRTUAL_FUNCTIONS "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNINITIALIZED_AUTOS "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_BOOL_CONVERSION "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_EMPTY_BODY "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_ENUM_CONVERSION "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_INT_CONVERSION "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_CONSTANT_CONVERSION "YES") |
| set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_NON_VIRTUAL_DESTRUCTOR "YES") |
| endif() |
| |
| # On Win32 using MS tools, provide an option to set the number of parallel jobs |
| # to use. |
| if( MSVC_IDE ) |
| set(LLVM_COMPILER_JOBS "0" CACHE STRING |
| "Number of parallel compiler jobs. 0 means use all processors. Default is 0.") |
| if( NOT LLVM_COMPILER_JOBS STREQUAL "1" ) |
| if( LLVM_COMPILER_JOBS STREQUAL "0" ) |
| add_definitions( /MP ) |
| else() |
| message(STATUS "Number of parallel compiler jobs set to " ${LLVM_COMPILER_JOBS}) |
| add_definitions( /MP${LLVM_COMPILER_JOBS} ) |
| endif() |
| else() |
| message(STATUS "Parallel compilation disabled") |
| endif() |
| endif() |
| |
| # set stack reserved size to ~10MB |
| if(MSVC) |
| # CMake previously automatically set this value for MSVC builds, but the |
| # behavior was changed in CMake 2.8.11 (Issue 12437) to use the MSVC default |
| # value (1 MB) which is not enough for us in tasks such as parsing recursive |
| # C++ templates in Clang. |
| set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /STACK:10000000") |
| elseif(MINGW) # FIXME: Also cygwin? |
| set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--stack,16777216") |
| |
| # Pass -mbig-obj to mingw gas to avoid COFF 2**16 section limit. |
| if (NOT CMAKE_CXX_COMPILER_ID MATCHES "Clang") |
| append("-Wa,-mbig-obj" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| endif() |
| |
| option(LLVM_ENABLE_WARNINGS "Enable compiler warnings." ON) |
| |
| if( MSVC ) |
| include(ChooseMSVCCRT) |
| |
| # Add definitions that make MSVC much less annoying. |
| add_definitions( |
| # For some reason MS wants to deprecate a bunch of standard functions... |
| -D_CRT_SECURE_NO_DEPRECATE |
| -D_CRT_SECURE_NO_WARNINGS |
| -D_CRT_NONSTDC_NO_DEPRECATE |
| -D_CRT_NONSTDC_NO_WARNINGS |
| -D_SCL_SECURE_NO_DEPRECATE |
| -D_SCL_SECURE_NO_WARNINGS |
| ) |
| |
| # Tell MSVC to use the Unicode version of the Win32 APIs instead of ANSI. |
| add_definitions( |
| -DUNICODE |
| -D_UNICODE |
| ) |
| |
| if (LLVM_WINSYSROOT) |
| if (NOT CLANG_CL) |
| message(ERROR "LLVM_WINSYSROOT requires clang-cl") |
| endif() |
| append("/winsysroot${LLVM_WINSYSROOT}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| |
| if (LLVM_ENABLE_WERROR) |
| append("/WX" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif (LLVM_ENABLE_WERROR) |
| |
| append("/Zc:inline" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| |
| # Some projects use the __cplusplus preprocessor macro to check support for |
| # a particular version of the C++ standard. When this option is not specified |
| # explicitly, macro's value is "199711L" that implies C++98 Standard. |
| # https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/ |
| append("/Zc:__cplusplus" CMAKE_CXX_FLAGS) |
| |
| # Allow users to request PDBs in release mode. CMake offeres the |
| # RelWithDebInfo configuration, but it uses different optimization settings |
| # (/Ob1 vs /Ob2 or -O2 vs -O3). LLVM provides this flag so that users can get |
| # PDBs without changing codegen. |
| option(LLVM_ENABLE_PDB OFF) |
| if (LLVM_ENABLE_PDB AND uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE") |
| append("/Zi" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| # /DEBUG disables linker GC and ICF, but we want those in Release mode. |
| append("/DEBUG /OPT:REF /OPT:ICF" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS |
| CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| |
| # Get all linker flags in upper case form so we can search them. |
| set(all_linker_flags_uppercase |
| "${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_MODULE_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS}") |
| string(TOUPPER "${all_linker_flags_uppercase}" all_linker_flags_uppercase) |
| |
| if (CLANG_CL AND LINKER_IS_LLD) |
| # If we are using clang-cl with lld-link and /debug is present in any of the |
| # linker flag variables, pass -gcodeview-ghash to the compiler to speed up |
| # linking. This flag is orthogonal from /Zi, /Z7, and other flags that |
| # enable debug info emission, and only has an effect if those are also in |
| # use. |
| string(FIND "${all_linker_flags_uppercase}" "/DEBUG" linker_flag_idx) |
| if (${linker_flag_idx} GREATER -1) |
| add_flag_if_supported("-gcodeview-ghash" GCODEVIEW_GHASH) |
| endif() |
| endif() |
| |
| # Disable string literal const->non-const type conversion. |
| # "When specified, the compiler requires strict const-qualification |
| # conformance for pointers initialized by using string literals." |
| append("/Zc:strictStrings" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| |
| # "Generate Intrinsic Functions". |
| append("/Oi" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| |
| # "Enforce type conversion rules". |
| append("/Zc:rvalueCast" CMAKE_CXX_FLAGS) |
| |
| if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT LLVM_ENABLE_LTO) |
| # clang-cl and cl by default produce non-deterministic binaries because |
| # link.exe /incremental requires a timestamp in the .obj file. clang-cl |
| # has the flag /Brepro to force deterministic binaries. We want to pass that |
| # whenever you're building with clang unless you're passing /incremental |
| # or using LTO (/Brepro with LTO would result in a warning about the flag |
| # being unused, because we're not generating object files). |
| # This checks CMAKE_CXX_COMPILER_ID in addition to check_cxx_compiler_flag() |
| # because cl.exe does not emit an error on flags it doesn't understand, |
| # letting check_cxx_compiler_flag() claim it understands all flags. |
| check_cxx_compiler_flag("/Brepro" SUPPORTS_BREPRO) |
| if (SUPPORTS_BREPRO) |
| # Check if /INCREMENTAL is passed to the linker and complain that it |
| # won't work with /Brepro. |
| string(FIND "${all_linker_flags_uppercase}" "/INCREMENTAL" linker_flag_idx) |
| if (${linker_flag_idx} GREATER -1) |
| message(WARNING "/Brepro not compatible with /INCREMENTAL linking - builds will be non-deterministic") |
| else() |
| append("/Brepro" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| endif() |
| endif() |
| # By default MSVC has a 2^16 limit on the number of sections in an object file, |
| # but in many objects files need more than that. This flag is to increase the |
| # number of sections. |
| append("/bigobj" CMAKE_CXX_FLAGS) |
| endif( MSVC ) |
| |
| # Warnings-as-errors handling for GCC-compatible compilers: |
| if ( LLVM_COMPILER_IS_GCC_COMPATIBLE ) |
| append_if(LLVM_ENABLE_WERROR "-Werror" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| append_if(LLVM_ENABLE_WERROR "-Wno-error" CMAKE_REQUIRED_FLAGS) |
| endif( LLVM_COMPILER_IS_GCC_COMPATIBLE ) |
| |
| # Specific default warnings-as-errors for compilers accepting GCC-compatible warning flags: |
| if ( LLVM_COMPILER_IS_GCC_COMPATIBLE OR CMAKE_CXX_COMPILER_ID MATCHES "XL" ) |
| add_flag_if_supported("-Werror=date-time" WERROR_DATE_TIME) |
| add_flag_if_supported("-Werror=unguarded-availability-new" WERROR_UNGUARDED_AVAILABILITY_NEW) |
| endif( LLVM_COMPILER_IS_GCC_COMPATIBLE OR CMAKE_CXX_COMPILER_ID MATCHES "XL" ) |
| |
| # Modules enablement for GCC-compatible compilers: |
| if ( LLVM_COMPILER_IS_GCC_COMPATIBLE AND LLVM_ENABLE_MODULES ) |
| set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) |
| set(module_flags "-fmodules -fmodules-cache-path=${PROJECT_BINARY_DIR}/module.cache") |
| if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin") |
| # On Darwin -fmodules does not imply -fcxx-modules. |
| set(module_flags "${module_flags} -fcxx-modules") |
| endif() |
| if (LLVM_ENABLE_LOCAL_SUBMODULE_VISIBILITY) |
| set(module_flags "${module_flags} -Xclang -fmodules-local-submodule-visibility") |
| endif() |
| if (LLVM_ENABLE_MODULE_DEBUGGING AND |
| ((uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG") OR |
| (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO"))) |
| set(module_flags "${module_flags} -gmodules") |
| endif() |
| set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${module_flags}") |
| |
| # Check that we can build code with modules enabled, and that repeatedly |
| # including <cassert> still manages to respect NDEBUG properly. |
| CHECK_CXX_SOURCE_COMPILES("#undef NDEBUG |
| #include <cassert> |
| #define NDEBUG |
| #include <cassert> |
| int main() { assert(this code is not compiled); }" |
| CXX_SUPPORTS_MODULES) |
| set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) |
| if (CXX_SUPPORTS_MODULES) |
| append("${module_flags}" CMAKE_CXX_FLAGS) |
| else() |
| message(FATAL_ERROR "LLVM_ENABLE_MODULES is not supported by this compiler") |
| endif() |
| endif( LLVM_COMPILER_IS_GCC_COMPATIBLE AND LLVM_ENABLE_MODULES ) |
| |
| if (MSVC) |
| if (NOT CLANG_CL) |
| set(msvc_warning_flags |
| # Disabled warnings. |
| -wd4141 # Suppress ''modifier' : used more than once' (because of __forceinline combined with inline) |
| -wd4146 # Suppress 'unary minus operator applied to unsigned type, result still unsigned' |
| -wd4244 # Suppress ''argument' : conversion from 'type1' to 'type2', possible loss of data' |
| -wd4267 # Suppress ''var' : conversion from 'size_t' to 'type', possible loss of data' |
| -wd4291 # Suppress ''declaration' : no matching operator delete found; memory will not be freed if initialization throws an exception' |
| -wd4351 # Suppress 'new behavior: elements of array 'array' will be default initialized' |
| -wd4456 # Suppress 'declaration of 'var' hides local variable' |
| -wd4457 # Suppress 'declaration of 'var' hides function parameter' |
| -wd4458 # Suppress 'declaration of 'var' hides class member' |
| -wd4459 # Suppress 'declaration of 'var' hides global declaration' |
| -wd4503 # Suppress ''identifier' : decorated name length exceeded, name was truncated' |
| -wd4624 # Suppress ''derived class' : destructor could not be generated because a base class destructor is inaccessible' |
| -wd4722 # Suppress 'function' : destructor never returns, potential memory leak |
| -wd4100 # Suppress 'unreferenced formal parameter' |
| -wd4127 # Suppress 'conditional expression is constant' |
| -wd4512 # Suppress 'assignment operator could not be generated' |
| -wd4505 # Suppress 'unreferenced local function has been removed' |
| -wd4610 # Suppress '<class> can never be instantiated' |
| -wd4510 # Suppress 'default constructor could not be generated' |
| -wd4702 # Suppress 'unreachable code' |
| -wd4245 # Suppress ''conversion' : conversion from 'type1' to 'type2', signed/unsigned mismatch' |
| -wd4706 # Suppress 'assignment within conditional expression' |
| -wd4310 # Suppress 'cast truncates constant value' |
| -wd4701 # Suppress 'potentially uninitialized local variable' |
| -wd4703 # Suppress 'potentially uninitialized local pointer variable' |
| -wd4389 # Suppress 'signed/unsigned mismatch' |
| -wd4611 # Suppress 'interaction between '_setjmp' and C++ object destruction is non-portable' |
| -wd4805 # Suppress 'unsafe mix of type <type> and type <type> in operation' |
| -wd4204 # Suppress 'nonstandard extension used : non-constant aggregate initializer' |
| -wd4577 # Suppress 'noexcept used with no exception handling mode specified; termination on exception is not guaranteed' |
| -wd4091 # Suppress 'typedef: ignored on left of '' when no variable is declared' |
| # C4592 is disabled because of false positives in Visual Studio 2015 |
| # Update 1. Re-evaluate the usefulness of this diagnostic with Update 2. |
| -wd4592 # Suppress ''var': symbol will be dynamically initialized (implementation limitation) |
| -wd4319 # Suppress ''operator' : zero extending 'type' to 'type' of greater size' |
| # C4709 is disabled because of a bug with Visual Studio 2017 as of |
| # v15.8.8. Re-evaluate the usefulness of this diagnostic when the bug |
| # is fixed. |
| -wd4709 # Suppress comma operator within array index expression |
| |
| # Ideally, we'd like this warning to be enabled, but even MSVC 2019 doesn't |
| # support the 'aligned' attribute in the way that clang sources requires (for |
| # any code that uses the LLVM_ALIGNAS macro), so this is must be disabled to |
| # avoid unwanted alignment warnings. |
| -wd4324 # Suppress 'structure was padded due to __declspec(align())' |
| |
| # Promoted warnings. |
| -w14062 # Promote 'enumerator in switch of enum is not handled' to level 1 warning. |
| |
| # Promoted warnings to errors. |
| -we4238 # Promote 'nonstandard extension used : class rvalue used as lvalue' to error. |
| ) |
| endif(NOT CLANG_CL) |
| |
| # Enable warnings |
| if (LLVM_ENABLE_WARNINGS) |
| # Put /W4 in front of all the -we flags. cl.exe doesn't care, but for |
| # clang-cl having /W4 after the -we flags will re-enable the warnings |
| # disabled by -we. |
| set(msvc_warning_flags "/W4 ${msvc_warning_flags}") |
| # CMake appends /W3 by default, and having /W3 followed by /W4 will result in |
| # cl : Command line warning D9025 : overriding '/W3' with '/W4'. Since this is |
| # a command line warning and not a compiler warning, it cannot be suppressed except |
| # by fixing the command line. |
| string(REGEX REPLACE " /W[0-4]" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}") |
| string(REGEX REPLACE " /W[0-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") |
| |
| if (LLVM_ENABLE_PEDANTIC) |
| # No MSVC equivalent available |
| endif (LLVM_ENABLE_PEDANTIC) |
| endif (LLVM_ENABLE_WARNINGS) |
| |
| foreach(flag ${msvc_warning_flags}) |
| append("${flag}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endforeach(flag) |
| endif (MSVC) |
| |
| if (LLVM_ENABLE_WARNINGS AND (LLVM_COMPILER_IS_GCC_COMPATIBLE OR CLANG_CL)) |
| |
| # Don't add -Wall for clang-cl, because it maps -Wall to -Weverything for |
| # MSVC compatibility. /W4 is added above instead. |
| if (NOT CLANG_CL) |
| append("-Wall" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| |
| append("-Wextra -Wno-unused-parameter -Wwrite-strings" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| append("-Wcast-qual" CMAKE_CXX_FLAGS) |
| |
| # Turn off missing field initializer warnings for gcc to avoid noise from |
| # false positives with empty {}. Turn them on otherwise (they're off by |
| # default for clang). |
| check_cxx_compiler_flag("-Wmissing-field-initializers" CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG) |
| if (CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG) |
| if (CMAKE_COMPILER_IS_GNUCXX) |
| append("-Wno-missing-field-initializers" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| else() |
| append("-Wmissing-field-initializers" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| endif() |
| |
| if (LLVM_ENABLE_PEDANTIC AND LLVM_COMPILER_IS_GCC_COMPATIBLE) |
| append("-pedantic" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| append("-Wno-long-long" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| |
| # GCC warns about redundant toplevel semicolons (enabled by -pedantic |
| # above), while Clang doesn't. Enable the corresponding Clang option to |
| # pick up on these even in builds with Clang. |
| add_flag_if_supported("-Wc++98-compat-extra-semi" CXX98_COMPAT_EXTRA_SEMI_FLAG) |
| endif() |
| |
| add_flag_if_supported("-Wimplicit-fallthrough" IMPLICIT_FALLTHROUGH_FLAG) |
| add_flag_if_supported("-Wcovered-switch-default" COVERED_SWITCH_DEFAULT_FLAG) |
| append_if(USE_NO_UNINITIALIZED "-Wno-uninitialized" CMAKE_CXX_FLAGS) |
| append_if(USE_NO_MAYBE_UNINITIALIZED "-Wno-maybe-uninitialized" CMAKE_CXX_FLAGS) |
| |
| # Disable -Wclass-memaccess, a C++-only warning from GCC 8 that fires on |
| # LLVM's ADT classes. |
| check_cxx_compiler_flag("-Wclass-memaccess" CXX_SUPPORTS_CLASS_MEMACCESS_FLAG) |
| append_if(CXX_SUPPORTS_CLASS_MEMACCESS_FLAG "-Wno-class-memaccess" CMAKE_CXX_FLAGS) |
| |
| # Disable -Wredundant-move and -Wpessimizing-move on GCC>=9. GCC wants to |
| # remove std::move in code like "A foo(ConvertibleToA a) { |
| # return std::move(a); }", but this code does not compile (or uses the copy |
| # constructor instead) on clang<=3.8. Clang also has a -Wredundant-move and |
| # -Wpessimizing-move, but they only fire when the types match exactly, so we |
| # can keep them here. |
| if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU") |
| check_cxx_compiler_flag("-Wredundant-move" CXX_SUPPORTS_REDUNDANT_MOVE_FLAG) |
| append_if(CXX_SUPPORTS_REDUNDANT_MOVE_FLAG "-Wno-redundant-move" CMAKE_CXX_FLAGS) |
| check_cxx_compiler_flag("-Wpessimizing-move" CXX_SUPPORTS_PESSIMIZING_MOVE_FLAG) |
| append_if(CXX_SUPPORTS_PESSIMIZING_MOVE_FLAG "-Wno-pessimizing-move" CMAKE_CXX_FLAGS) |
| endif() |
| |
| # The LLVM libraries have no stable C++ API, so -Wnoexcept-type is not useful. |
| check_cxx_compiler_flag("-Wnoexcept-type" CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG) |
| append_if(CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG "-Wno-noexcept-type" CMAKE_CXX_FLAGS) |
| |
| # Check if -Wnon-virtual-dtor warns for a class marked final, when it has a |
| # friend declaration. If it does, don't add -Wnon-virtual-dtor. The case is |
| # considered unhelpful (https://gcc.gnu.org/PR102168). |
| set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) |
| set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror=non-virtual-dtor") |
| CHECK_CXX_SOURCE_COMPILES("class f {}; |
| class base {friend f; public: virtual void anchor();protected: ~base();}; |
| int main() { return 0; }" |
| CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR) |
| set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) |
| append_if(CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR "-Wnon-virtual-dtor" CMAKE_CXX_FLAGS) |
| |
| append("-Wdelete-non-virtual-dtor" CMAKE_CXX_FLAGS) |
| |
| # Enable -Wsuggest-override if it's available, and only if it doesn't |
| # suggest adding 'override' to functions that are already marked 'final' |
| # (which means it is disabled for GCC < 9.2). |
| check_cxx_compiler_flag("-Wsuggest-override" CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG) |
| if (CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG) |
| set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) |
| set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror=suggest-override") |
| CHECK_CXX_SOURCE_COMPILES("class base {public: virtual void anchor();}; |
| class derived : base {public: void anchor() final;}; |
| int main() { return 0; }" |
| CXX_WSUGGEST_OVERRIDE_ALLOWS_ONLY_FINAL) |
| set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) |
| append_if(CXX_WSUGGEST_OVERRIDE_ALLOWS_ONLY_FINAL "-Wsuggest-override" CMAKE_CXX_FLAGS) |
| endif() |
| |
| # Check if -Wcomment is OK with an // comment ending with '\' if the next |
| # line is also a // comment. |
| set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) |
| set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror -Wcomment") |
| CHECK_C_SOURCE_COMPILES("// \\\\\\n//\\nint main() {return 0;}" |
| C_WCOMMENT_ALLOWS_LINE_WRAP) |
| set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) |
| if (NOT C_WCOMMENT_ALLOWS_LINE_WRAP) |
| append("-Wno-comment" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| |
| # Enable -Wstring-conversion to catch misuse of string literals. |
| add_flag_if_supported("-Wstring-conversion" STRING_CONVERSION_FLAG) |
| |
| # Prevent bugs that can happen with llvm's brace style. |
| add_flag_if_supported("-Wmisleading-indentation" MISLEADING_INDENTATION_FLAG) |
| endif (LLVM_ENABLE_WARNINGS AND (LLVM_COMPILER_IS_GCC_COMPATIBLE OR CLANG_CL)) |
| |
| if (LLVM_COMPILER_IS_GCC_COMPATIBLE AND NOT LLVM_ENABLE_WARNINGS) |
| append("-w" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| |
| macro(append_common_sanitizer_flags) |
| if (NOT MSVC) |
| # Append -fno-omit-frame-pointer and turn on debug info to get better |
| # stack traces. |
| add_flag_if_supported("-fno-omit-frame-pointer" FNO_OMIT_FRAME_POINTER) |
| if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND |
| NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO") |
| add_flag_if_supported("-gline-tables-only" GLINE_TABLES_ONLY) |
| endif() |
| # Use -O1 even in debug mode, otherwise sanitizers slowdown is too large. |
| if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND LLVM_OPTIMIZE_SANITIZED_BUILDS) |
| add_flag_if_supported("-O1" O1) |
| endif() |
| elseif (CLANG_CL) |
| # Keep frame pointers around. |
| append("/Oy-" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| # Always ask the linker to produce symbols with asan. |
| append("/Z7" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| append("-debug" CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| endmacro() |
| |
| # Turn on sanitizers if necessary. |
| if(LLVM_USE_SANITIZER) |
| if (LLVM_ON_UNIX) |
| if (LLVM_USE_SANITIZER STREQUAL "Address") |
| append_common_sanitizer_flags() |
| append("-fsanitize=address" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| elseif (LLVM_USE_SANITIZER STREQUAL "HWAddress") |
| append_common_sanitizer_flags() |
| append("-fsanitize=hwaddress" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?") |
| append_common_sanitizer_flags() |
| append("-fsanitize=memory" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| if(LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins") |
| append("-fsanitize-memory-track-origins" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| elseif (LLVM_USE_SANITIZER STREQUAL "Undefined") |
| append_common_sanitizer_flags() |
| append("${LLVM_UBSAN_FLAGS}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| elseif (LLVM_USE_SANITIZER STREQUAL "Thread") |
| append_common_sanitizer_flags() |
| append("-fsanitize=thread" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| elseif (LLVM_USE_SANITIZER STREQUAL "DataFlow") |
| append("-fsanitize=dataflow" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| elseif (LLVM_USE_SANITIZER STREQUAL "Address;Undefined" OR |
| LLVM_USE_SANITIZER STREQUAL "Undefined;Address") |
| append_common_sanitizer_flags() |
| append("-fsanitize=address" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| append("${LLVM_UBSAN_FLAGS}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| elseif (LLVM_USE_SANITIZER STREQUAL "Leaks") |
| append_common_sanitizer_flags() |
| append("-fsanitize=leak" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| else() |
| message(FATAL_ERROR "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}") |
| endif() |
| elseif(MINGW) |
| if (LLVM_USE_SANITIZER STREQUAL "Address") |
| append_common_sanitizer_flags() |
| append("-fsanitize=address" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| elseif (LLVM_USE_SANITIZER STREQUAL "Undefined") |
| append_common_sanitizer_flags() |
| append("${LLVM_UBSAN_FLAGS}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| elseif (LLVM_USE_SANITIZER STREQUAL "Address;Undefined" OR |
| LLVM_USE_SANITIZER STREQUAL "Undefined;Address") |
| append_common_sanitizer_flags() |
| append("-fsanitize=address" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| append("${LLVM_UBSAN_FLAGS}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| else() |
| message(FATAL_ERROR "This sanitizer not yet supported in a MinGW environment: ${LLVM_USE_SANITIZER}") |
| endif() |
| elseif(MSVC) |
| if (LLVM_USE_SANITIZER STREQUAL "Address") |
| append_common_sanitizer_flags() |
| append("-fsanitize=address" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| else() |
| message(FATAL_ERROR "This sanitizer not yet supported in the MSVC environment: ${LLVM_USE_SANITIZER}") |
| endif() |
| else() |
| message(FATAL_ERROR "LLVM_USE_SANITIZER is not supported on this platform.") |
| endif() |
| if (LLVM_USE_SANITIZER MATCHES "(Undefined;)?Address(;Undefined)?") |
| add_flag_if_supported("-fsanitize-address-use-after-scope" |
| FSANITIZE_USE_AFTER_SCOPE_FLAG) |
| endif() |
| if (LLVM_USE_SANITIZE_COVERAGE) |
| append("-fsanitize=fuzzer-no-link" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| if (LLVM_USE_SANITIZER MATCHES ".*Undefined.*") |
| set(IGNORELIST_FILE "${CMAKE_SOURCE_DIR}/utils/sanitizers/ubsan_ignorelist.txt") |
| if (EXISTS "${IGNORELIST_FILE}") |
| # Use this option name version since -fsanitize-ignorelist is only |
| # accepted with clang 13.0 or newer. |
| append("-fsanitize-blacklist=${IGNORELIST_FILE}" |
| CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| endif() |
| endif() |
| |
| # Turn on -gsplit-dwarf if requested in debug builds. |
| if (LLVM_USE_SPLIT_DWARF AND |
| ((uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG") OR |
| (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO"))) |
| # Limit to clang and gcc so far. Add compilers supporting this option. |
| if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR |
| CMAKE_CXX_COMPILER_ID STREQUAL "GNU") |
| add_compile_options(-gsplit-dwarf) |
| include(LLVMCheckLinkerFlag) |
| llvm_check_linker_flag(CXX "-Wl,--gdb-index" LINKER_SUPPORTS_GDB_INDEX) |
| append_if(LINKER_SUPPORTS_GDB_INDEX "-Wl,--gdb-index" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| endif() |
| |
| add_definitions( -D__STDC_CONSTANT_MACROS ) |
| add_definitions( -D__STDC_FORMAT_MACROS ) |
| add_definitions( -D__STDC_LIMIT_MACROS ) |
| |
| # clang and gcc don't default-print colored diagnostics when invoked from Ninja. |
| if (UNIX AND |
| CMAKE_GENERATOR STREQUAL "Ninja" AND |
| (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR |
| (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND |
| NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)))) |
| append("-fdiagnostics-color" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| |
| # lld doesn't print colored diagnostics when invoked from Ninja |
| if (UNIX AND CMAKE_GENERATOR STREQUAL "Ninja") |
| include(LLVMCheckLinkerFlag) |
| llvm_check_linker_flag(CXX "-Wl,--color-diagnostics" LINKER_SUPPORTS_COLOR_DIAGNOSTICS) |
| append_if(LINKER_SUPPORTS_COLOR_DIAGNOSTICS "-Wl,--color-diagnostics" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| |
| # Add flags for add_dead_strip(). |
| # FIXME: With MSVS, consider compiling with /Gy and linking with /OPT:REF? |
| # But MinSizeRel seems to add that automatically, so maybe disable these |
| # flags instead if LLVM_NO_DEAD_STRIP is set. |
| if(NOT CYGWIN AND NOT MSVC) |
| if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND |
| NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG") |
| check_c_compiler_flag("-Werror -fno-function-sections" C_SUPPORTS_FNO_FUNCTION_SECTIONS) |
| if (C_SUPPORTS_FNO_FUNCTION_SECTIONS) |
| # Don't add -ffunction-sections if it can't be disabled with -fno-function-sections. |
| # Doing so will break sanitizers. |
| add_flag_if_supported("-ffunction-sections" FFUNCTION_SECTIONS) |
| elseif (CMAKE_CXX_COMPILER_ID MATCHES "XL") |
| append("-qfuncsect" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| add_flag_if_supported("-fdata-sections" FDATA_SECTIONS) |
| endif() |
| elseif(MSVC) |
| if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" ) |
| append("/Gw" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| endif() |
| endif() |
| |
| if(MSVC) |
| # Remove flags here, for exceptions and RTTI. |
| # Each target property or source property should be responsible to control |
| # them. |
| # CL.EXE complains to override flags like "/GR /GR-". |
| string(REGEX REPLACE "(^| ) */EH[-cs]+ *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") |
| string(REGEX REPLACE "(^| ) */GR-? *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") |
| endif() |
| |
| # Provide public options to globally control RTTI and EH |
| option(LLVM_ENABLE_EH "Enable Exception handling" OFF) |
| option(LLVM_ENABLE_RTTI "Enable run time type information" OFF) |
| if(LLVM_ENABLE_EH AND NOT LLVM_ENABLE_RTTI) |
| message(FATAL_ERROR "Exception handling requires RTTI. You must set LLVM_ENABLE_RTTI to ON") |
| endif() |
| |
| option(LLVM_USE_NEWPM "Build LLVM using the experimental new pass manager" Off) |
| mark_as_advanced(LLVM_USE_NEWPM) |
| if (LLVM_USE_NEWPM) |
| append("-fexperimental-new-pass-manager" |
| CMAKE_CXX_FLAGS |
| CMAKE_C_FLAGS |
| CMAKE_EXE_LINKER_FLAGS |
| CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| |
| option(LLVM_ENABLE_IR_PGO "Build LLVM and tools with IR PGO instrumentation (deprecated)" Off) |
| mark_as_advanced(LLVM_ENABLE_IR_PGO) |
| |
| set(LLVM_BUILD_INSTRUMENTED OFF CACHE STRING "Build LLVM and tools with PGO instrumentation. May be specified as IR or Frontend") |
| set(LLVM_VP_COUNTERS_PER_SITE "1.5" CACHE STRING "Value profile counters to use per site for IR PGO with Clang") |
| mark_as_advanced(LLVM_BUILD_INSTRUMENTED LLVM_VP_COUNTERS_PER_SITE) |
| string(TOUPPER "${LLVM_BUILD_INSTRUMENTED}" uppercase_LLVM_BUILD_INSTRUMENTED) |
| |
| if (LLVM_BUILD_INSTRUMENTED) |
| if (LLVM_ENABLE_IR_PGO OR uppercase_LLVM_BUILD_INSTRUMENTED STREQUAL "IR") |
| append("-fprofile-generate=\"${LLVM_PROFILE_DATA_DIR}\"" |
| CMAKE_CXX_FLAGS |
| CMAKE_C_FLAGS) |
| if(NOT LINKER_IS_LLD_LINK) |
| append("-fprofile-generate=\"${LLVM_PROFILE_DATA_DIR}\"" |
| CMAKE_EXE_LINKER_FLAGS |
| CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| # Set this to avoid running out of the value profile node section |
| # under clang in dynamic linking mode. |
| if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND |
| CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 11 AND |
| LLVM_LINK_LLVM_DYLIB) |
| append("-Xclang -mllvm -Xclang -vp-counters-per-site=${LLVM_VP_COUNTERS_PER_SITE}" |
| CMAKE_CXX_FLAGS |
| CMAKE_C_FLAGS) |
| endif() |
| elseif(uppercase_LLVM_BUILD_INSTRUMENTED STREQUAL "CSIR") |
| append("-fcs-profile-generate=\"${LLVM_CSPROFILE_DATA_DIR}\"" |
| CMAKE_CXX_FLAGS |
| CMAKE_C_FLAGS) |
| if(NOT LINKER_IS_LLD_LINK) |
| append("-fcs-profile-generate=\"${LLVM_CSPROFILE_DATA_DIR}\"" |
| CMAKE_EXE_LINKER_FLAGS |
| CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| else() |
| append("-fprofile-instr-generate=\"${LLVM_PROFILE_FILE_PATTERN}\"" |
| CMAKE_CXX_FLAGS |
| CMAKE_C_FLAGS) |
| if(NOT LINKER_IS_LLD_LINK) |
| append("-fprofile-instr-generate=\"${LLVM_PROFILE_FILE_PATTERN}\"" |
| CMAKE_EXE_LINKER_FLAGS |
| CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| endif() |
| endif() |
| |
| # When using clang-cl with an instrumentation-based tool, add clang's library |
| # resource directory to the library search path. Because cmake invokes the |
| # linker directly, it isn't sufficient to pass -fsanitize=* to the linker. |
| if (CLANG_CL AND (LLVM_BUILD_INSTRUMENTED OR LLVM_USE_SANITIZER)) |
| execute_process( |
| COMMAND ${CMAKE_CXX_COMPILER} /clang:-print-libgcc-file-name /clang:--rtlib=compiler-rt |
| OUTPUT_VARIABLE clang_compiler_rt_file |
| ERROR_VARIABLE clang_cl_stderr |
| OUTPUT_STRIP_TRAILING_WHITESPACE |
| ERROR_STRIP_TRAILING_WHITESPACE |
| RESULT_VARIABLE clang_cl_exit_code) |
| if (NOT "${clang_cl_exit_code}" STREQUAL "0") |
| message(FATAL_ERROR |
| "Unable to invoke clang-cl to find resource dir: ${clang_cl_stderr}") |
| endif() |
| file(TO_CMAKE_PATH "${clang_compiler_rt_file}" clang_compiler_rt_file) |
| get_filename_component(clang_runtime_dir "${clang_compiler_rt_file}" DIRECTORY) |
| append("/libpath:${clang_runtime_dir}" |
| CMAKE_EXE_LINKER_FLAGS |
| CMAKE_MODULE_LINKER_FLAGS |
| CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| |
| if(LLVM_PROFDATA_FILE AND EXISTS ${LLVM_PROFDATA_FILE}) |
| if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" ) |
| append("-fprofile-instr-use=\"${LLVM_PROFDATA_FILE}\"" |
| CMAKE_CXX_FLAGS |
| CMAKE_C_FLAGS) |
| if(NOT LINKER_IS_LLD_LINK) |
| append("-fprofile-instr-use=\"${LLVM_PROFDATA_FILE}\"" |
| CMAKE_EXE_LINKER_FLAGS |
| CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| else() |
| message(FATAL_ERROR "LLVM_PROFDATA_FILE can only be specified when compiling with clang") |
| endif() |
| endif() |
| |
| option(LLVM_BUILD_INSTRUMENTED_COVERAGE "Build LLVM and tools with Code Coverage instrumentation" Off) |
| mark_as_advanced(LLVM_BUILD_INSTRUMENTED_COVERAGE) |
| append_if(LLVM_BUILD_INSTRUMENTED_COVERAGE "-fprofile-instr-generate=\"${LLVM_PROFILE_FILE_PATTERN}\" -fcoverage-mapping" |
| CMAKE_CXX_FLAGS |
| CMAKE_C_FLAGS |
| CMAKE_EXE_LINKER_FLAGS |
| CMAKE_SHARED_LINKER_FLAGS) |
| |
| if (LLVM_BUILD_INSTRUMENTED AND LLVM_BUILD_INSTRUMENTED_COVERAGE) |
| message(FATAL_ERROR "LLVM_BUILD_INSTRUMENTED and LLVM_BUILD_INSTRUMENTED_COVERAGE cannot both be specified") |
| endif() |
| |
| if(LLVM_ENABLE_LTO AND LLVM_ON_WIN32 AND NOT LINKER_IS_LLD_LINK AND NOT MINGW) |
| message(FATAL_ERROR "When compiling for Windows, LLVM_ENABLE_LTO requires using lld as the linker (point CMAKE_LINKER at lld-link.exe)") |
| endif() |
| if(uppercase_LLVM_ENABLE_LTO STREQUAL "THIN") |
| append("-flto=thin" CMAKE_CXX_FLAGS CMAKE_C_FLAGS) |
| if(NOT LINKER_IS_LLD_LINK) |
| append("-flto=thin" CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| # If the linker supports it, enable the lto cache. This improves initial build |
| # time a little since we re-link a lot of the same objects, and significantly |
| # improves incremental build time. |
| # FIXME: We should move all this logic into the clang driver. |
| if(APPLE) |
| append("-Wl,-cache_path_lto,${PROJECT_BINARY_DIR}/lto.cache" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| elseif((UNIX OR MINGW) AND LLVM_USE_LINKER STREQUAL "lld") |
| append("-Wl,--thinlto-cache-dir=${PROJECT_BINARY_DIR}/lto.cache" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| elseif(LLVM_USE_LINKER STREQUAL "gold") |
| append("-Wl,--plugin-opt,cache-dir=${PROJECT_BINARY_DIR}/lto.cache" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| elseif(LINKER_IS_LLD_LINK) |
| append("/lldltocache:${PROJECT_BINARY_DIR}/lto.cache" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| elseif(uppercase_LLVM_ENABLE_LTO STREQUAL "FULL") |
| append("-flto=full" CMAKE_CXX_FLAGS CMAKE_C_FLAGS) |
| if(NOT LINKER_IS_LLD_LINK) |
| append("-flto=full" CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| elseif(LLVM_ENABLE_LTO) |
| append("-flto" CMAKE_CXX_FLAGS CMAKE_C_FLAGS) |
| if(NOT LINKER_IS_LLD_LINK) |
| append("-flto" CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) |
| endif() |
| endif() |
| |
| # Set an AIX default for LLVM_EXPORT_SYMBOLS_FOR_PLUGINS based on whether we are |
| # doing dynamic linking (see below). |
| set(LLVM_EXPORT_SYMBOLS_FOR_PLUGINS_AIX_default OFF) |
| if (NOT (BUILD_SHARED_LIBS OR LLVM_LINK_LLVM_DYLIB)) |
| set(LLVM_EXPORT_SYMBOLS_FOR_PLUGINS_AIX_default ON) |
| endif() |
| |
| # This option makes utils/extract_symbols.py be used to determine the list of |
| # symbols to export from LLVM tools. This is necessary when on AIX or when using |
| # MSVC if you want to allow plugins. On AIX we don't show this option, and we |
| # enable it by default except when the LLVM libraries are set up for dynamic |
| # linking (due to incompatibility). With MSVC, note that the plugin has to |
| # explicitly link against (exactly one) tool so we can't unilaterally turn on |
| # LLVM_ENABLE_PLUGINS when it's enabled. |
| CMAKE_DEPENDENT_OPTION(LLVM_EXPORT_SYMBOLS_FOR_PLUGINS |
| "Export symbols from LLVM tools so that plugins can import them" OFF |
| "NOT ${CMAKE_SYSTEM_NAME} MATCHES AIX" ${LLVM_EXPORT_SYMBOLS_FOR_PLUGINS_AIX_default}) |
| if(BUILD_SHARED_LIBS AND LLVM_EXPORT_SYMBOLS_FOR_PLUGINS) |
| message(FATAL_ERROR "BUILD_SHARED_LIBS not compatible with LLVM_EXPORT_SYMBOLS_FOR_PLUGINS") |
| endif() |
| if(LLVM_LINK_LLVM_DYLIB AND LLVM_EXPORT_SYMBOLS_FOR_PLUGINS) |
| message(FATAL_ERROR "LLVM_LINK_LLVM_DYLIB not compatible with LLVM_EXPORT_SYMBOLS_FOR_PLUGINS") |
| endif() |
| |
| # By default we should enable LLVM_ENABLE_IDE only for multi-configuration |
| # generators. This option disables optional build system features that make IDEs |
| # less usable. |
| set(LLVM_ENABLE_IDE_default OFF) |
| if (CMAKE_CONFIGURATION_TYPES) |
| set(LLVM_ENABLE_IDE_default ON) |
| endif() |
| option(LLVM_ENABLE_IDE |
| "Disable optional build system features that cause problems for IDE generators" |
| ${LLVM_ENABLE_IDE_default}) |
| if (CMAKE_CONFIGURATION_TYPES AND NOT LLVM_ENABLE_IDE) |
| message(WARNING "Disabling LLVM_ENABLE_IDE on multi-configuration generators is not recommended.") |
| endif() |
| |
| function(get_compile_definitions) |
| get_directory_property(top_dir_definitions DIRECTORY ${CMAKE_SOURCE_DIR} COMPILE_DEFINITIONS) |
| foreach(definition ${top_dir_definitions}) |
| if(DEFINED result) |
| string(APPEND result " -D${definition}") |
| else() |
| set(result "-D${definition}") |
| endif() |
| endforeach() |
| set(LLVM_DEFINITIONS "${result}" PARENT_SCOPE) |
| endfunction() |
| get_compile_definitions() |
| |
| option(LLVM_FORCE_ENABLE_STATS "Enable statistics collection for builds that wouldn't normally enable it" OFF) |
| |
| check_symbol_exists(os_signpost_interval_begin "os/signpost.h" macos_signposts_available) |
| if(macos_signposts_available) |
| check_cxx_source_compiles( |
| "#include <os/signpost.h> |
| int main() { os_signpost_interval_begin(nullptr, 0, \"\", \"\"); return 0; }" |
| macos_signposts_usable) |
| if(macos_signposts_usable) |
| set(LLVM_ENABLE_SUPPORT_XCODE_SIGNPOSTS "WITH_ASSERTS" CACHE STRING |
| "Enable support for Xcode signposts. Can be WITH_ASSERTS, FORCE_ON, FORCE_OFF") |
| string(TOUPPER "${LLVM_ENABLE_SUPPORT_XCODE_SIGNPOSTS}" |
| uppercase_LLVM_ENABLE_SUPPORT_XCODE_SIGNPOSTS) |
| if( uppercase_LLVM_ENABLE_SUPPORT_XCODE_SIGNPOSTS STREQUAL "WITH_ASSERTS" ) |
| if( LLVM_ENABLE_ASSERTIONS ) |
| set( LLVM_SUPPORT_XCODE_SIGNPOSTS 1 ) |
| endif() |
| elseif( uppercase_LLVM_ENABLE_SUPPORT_XCODE_SIGNPOSTS STREQUAL "FORCE_ON" ) |
| set( LLVM_SUPPORT_XCODE_SIGNPOSTS 1 ) |
| elseif( uppercase_LLVM_ENABLE_SUPPORT_XCODE_SIGNPOSTS STREQUAL "FORCE_OFF" ) |
| # We don't need to do anything special to turn off signposts. |
| elseif( NOT DEFINED LLVM_ENABLE_SUPPORT_XCODE_SIGNPOSTS ) |
| # Treat LLVM_ENABLE_SUPPORT_XCODE_SIGNPOSTS like "FORCE_OFF" when it has not been |
| # defined. |
| else() |
| message(FATAL_ERROR "Unknown value for LLVM_ENABLE_SUPPORT_XCODE_SIGNPOSTS:" |
| " \"${LLVM_ENABLE_SUPPORT_XCODE_SIGNPOSTS}\"!") |
| endif() |
| endif() |
| endif() |
| |
| set(LLVM_SOURCE_PREFIX "" CACHE STRING "Use prefix for sources") |
| |
| option(LLVM_USE_RELATIVE_PATHS_IN_DEBUG_INFO "Use relative paths in debug info" OFF) |
| |
| if(LLVM_USE_RELATIVE_PATHS_IN_DEBUG_INFO) |
| check_c_compiler_flag("-fdebug-prefix-map=foo=bar" SUPPORTS_FDEBUG_PREFIX_MAP) |
| if(LLVM_ENABLE_PROJECTS_USED) |
| get_filename_component(source_root "${LLVM_MAIN_SRC_DIR}/.." ABSOLUTE) |
| else() |
| set(source_root "${LLVM_MAIN_SRC_DIR}") |
| endif() |
| file(RELATIVE_PATH relative_root "${source_root}" "${CMAKE_BINARY_DIR}") |
| append_if(SUPPORTS_FDEBUG_PREFIX_MAP "-fdebug-prefix-map=${CMAKE_BINARY_DIR}=${relative_root}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| append_if(SUPPORTS_FDEBUG_PREFIX_MAP "-fdebug-prefix-map=${source_root}/=${LLVM_SOURCE_PREFIX}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| add_flag_if_supported("-no-canonical-prefixes" NO_CANONICAL_PREFIXES) |
| endif() |
| |
| option(LLVM_USE_RELATIVE_PATHS_IN_FILES "Use relative paths in sources and debug info" OFF) |
| |
| if(LLVM_USE_RELATIVE_PATHS_IN_FILES) |
| check_c_compiler_flag("-ffile-prefix-map=foo=bar" SUPPORTS_FFILE_PREFIX_MAP) |
| if(LLVM_ENABLE_PROJECTS_USED) |
| get_filename_component(source_root "${LLVM_MAIN_SRC_DIR}/.." ABSOLUTE) |
| else() |
| set(source_root "${LLVM_MAIN_SRC_DIR}") |
| endif() |
| file(RELATIVE_PATH relative_root "${source_root}" "${CMAKE_BINARY_DIR}") |
| append_if(SUPPORTS_FFILE_PREFIX_MAP "-ffile-prefix-map=${CMAKE_BINARY_DIR}=${relative_root}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| append_if(SUPPORTS_FFILE_PREFIX_MAP "-ffile-prefix-map=${source_root}/=${LLVM_SOURCE_PREFIX}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) |
| add_flag_if_supported("-no-canonical-prefixes" NO_CANONICAL_PREFIXES) |
| endif() |
| |
| if(LLVM_INCLUDE_TESTS) |
| # Lit test suite requires at least python 3.6 |
| set(LLVM_MINIMUM_PYTHON_VERSION 3.6) |
| else() |
| # FIXME: it is unknown if this is the actual minimum bound |
| set(LLVM_MINIMUM_PYTHON_VERSION 3.0) |
| endif() |