mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 04:30:23 +00:00
8d1cf2218d
This allows asm files and Cxx files to be compiled with different flags rather than treating them identically. LLVM itself has no asm files other than tests, but this setting is inherited by the compiler-rt project (unless compiled standalone), which does have asm files. Differential Revision: http://reviews.llvm.org/D10707 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243419 91177308-0d34-0410-b5e6-96231b3b80d8
563 lines
24 KiB
CMake
563 lines
24 KiB
CMake
# This CMake module is responsible for interpreting the user defined LLVM_
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# options and executing the appropriate CMake commands to realize the users'
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# selections.
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# This is commonly needed so make sure it's defined before we include anything
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# else.
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string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
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include(HandleLLVMStdlib)
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include(AddLLVMDefinitions)
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include(CheckCCompilerFlag)
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include(CheckCXXCompilerFlag)
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if(NOT LLVM_FORCE_USE_OLD_TOOLCHAIN)
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if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
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if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
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message(FATAL_ERROR "Host GCC version must be at least 4.7!")
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endif()
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elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
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if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.1)
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message(FATAL_ERROR "Host Clang version must be at least 3.1!")
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endif()
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if (CMAKE_CXX_SIMULATE_ID MATCHES "MSVC")
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if (CMAKE_CXX_SIMULATE_VERSION VERSION_LESS 18.0)
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message(FATAL_ERROR "Host Clang must have at least -fms-compatibility-version=18.0")
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endif()
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set(CLANG_CL 1)
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elseif(NOT LLVM_ENABLE_LIBCXX)
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# Otherwise, test that we aren't using too old of a version of libstdc++
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# with the Clang compiler. This is tricky as there is no real way to
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# check the version of libstdc++ directly. Instead we test for a known
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# bug in libstdc++4.6 that is fixed in libstdc++4.7.
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set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
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set(OLD_CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
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set(CMAKE_REQUIRED_FLAGS "-std=c++0x")
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check_cxx_source_compiles("
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#include <atomic>
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std::atomic<float> x(0.0f);
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int main() { return (float)x; }"
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LLVM_NO_OLD_LIBSTDCXX)
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if(NOT LLVM_NO_OLD_LIBSTDCXX)
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message(FATAL_ERROR "Host Clang must be able to find libstdc++4.7 or newer!")
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endif()
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set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
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set(CMAKE_REQUIRED_LIBRARIES ${OLD_CMAKE_REQUIRED_LIBRARIES})
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endif()
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elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
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if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0)
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message(FATAL_ERROR "Host Visual Studio must be at least 2013")
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elseif(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0.31101)
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message(WARNING "Host Visual Studio should at least be 2013 Update 4 (MSVC 18.0.31101)"
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" due to miscompiles from earlier versions")
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endif()
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endif()
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endif()
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if( LLVM_ENABLE_ASSERTIONS )
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# MSVC doesn't like _DEBUG on release builds. See PR 4379.
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if( NOT MSVC )
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add_definitions( -D_DEBUG )
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endif()
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# On non-Debug builds cmake automatically defines NDEBUG, so we
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# explicitly undefine it:
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if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
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add_definitions( -UNDEBUG )
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# Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
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foreach (flags_var_to_scrub
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CMAKE_CXX_FLAGS_RELEASE
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CMAKE_CXX_FLAGS_RELWITHDEBINFO
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CMAKE_CXX_FLAGS_MINSIZEREL
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CMAKE_C_FLAGS_RELEASE
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CMAKE_C_FLAGS_RELWITHDEBINFO
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CMAKE_C_FLAGS_MINSIZEREL)
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string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
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"${flags_var_to_scrub}" "${${flags_var_to_scrub}}")
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endforeach()
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endif()
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endif()
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string(TOUPPER "${LLVM_ABI_BREAKING_CHECKS}" uppercase_LLVM_ABI_BREAKING_CHECKS)
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if( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "WITH_ASSERTS" )
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if( LLVM_ENABLE_ASSERTIONS )
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set( LLVM_ENABLE_ABI_BREAKING_CHECKS 1 )
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endif()
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elseif( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "FORCE_ON" )
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set( LLVM_ENABLE_ABI_BREAKING_CHECKS 1 )
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elseif( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "FORCE_OFF" )
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# We don't need to do anything special to turn off ABI breaking checks.
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elseif( NOT DEFINED LLVM_ABI_BREAKING_CHECKS )
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# Treat LLVM_ABI_BREAKING_CHECKS like "FORCE_OFF" when it has not been
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# defined.
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else()
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message(FATAL_ERROR "Unknown value for LLVM_ABI_BREAKING_CHECKS: \"${LLVM_ABI_BREAKING_CHECKS}\"!")
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endif()
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if(WIN32)
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set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
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if(CYGWIN)
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set(LLVM_ON_WIN32 0)
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set(LLVM_ON_UNIX 1)
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else(CYGWIN)
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set(LLVM_ON_WIN32 1)
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set(LLVM_ON_UNIX 0)
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endif(CYGWIN)
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else(WIN32)
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if(UNIX)
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set(LLVM_ON_WIN32 0)
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set(LLVM_ON_UNIX 1)
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if(APPLE)
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set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
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else(APPLE)
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set(LLVM_HAVE_LINK_VERSION_SCRIPT 1)
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endif(APPLE)
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else(UNIX)
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MESSAGE(SEND_ERROR "Unable to determine platform")
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endif(UNIX)
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endif(WIN32)
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set(EXEEXT ${CMAKE_EXECUTABLE_SUFFIX})
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set(LTDL_SHLIB_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
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# We use *.dylib rather than *.so on darwin.
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set(LLVM_PLUGIN_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
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if(APPLE)
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# Darwin-specific linker flags for loadable modules.
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set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-flat_namespace -Wl,-undefined -Wl,suppress")
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endif()
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# Pass -Wl,-z,defs. This makes sure all symbols are defined. Otherwise a DSO
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# build might work on ELF but fail on MachO/COFF.
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if(NOT (${CMAKE_SYSTEM_NAME} MATCHES "Darwin" OR WIN32 OR CYGWIN OR
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${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD") AND
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NOT LLVM_USE_SANITIZER)
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set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-z,defs")
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endif()
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function(append value)
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foreach(variable ${ARGN})
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set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
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endforeach(variable)
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endfunction()
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function(append_if condition value)
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if (${condition})
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foreach(variable ${ARGN})
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set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
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endforeach(variable)
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endif()
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endfunction()
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macro(add_flag_if_supported flag name)
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check_c_compiler_flag("-Werror ${flag}" "C_SUPPORTS_${name}")
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append_if("C_SUPPORTS_${name}" "${flag}" CMAKE_C_FLAGS)
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check_cxx_compiler_flag("-Werror ${flag}" "CXX_SUPPORTS_${name}")
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append_if("CXX_SUPPORTS_${name}" "${flag}" CMAKE_CXX_FLAGS)
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endmacro()
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function(add_flag_or_print_warning flag name)
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check_c_compiler_flag("-Werror ${flag}" "C_SUPPORTS_${name}")
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check_cxx_compiler_flag("-Werror ${flag}" "CXX_SUPPORTS_${name}")
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if (C_SUPPORTS_${name} AND CXX_SUPPORTS_${name})
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message(STATUS "Building with ${flag}")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" PARENT_SCOPE)
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set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} ${flag}" PARENT_SCOPE)
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else()
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message(WARNING "${flag} is not supported.")
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endif()
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endfunction()
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if( LLVM_ENABLE_PIC )
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if( XCODE )
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# Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't
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# know how to disable this, so just force ENABLE_PIC off for now.
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message(WARNING "-fPIC not supported with Xcode.")
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elseif( WIN32 OR CYGWIN)
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# On Windows all code is PIC. MinGW warns if -fPIC is used.
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else()
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add_flag_or_print_warning("-fPIC" FPIC)
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if( WIN32 OR CYGWIN)
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# MinGW warns if -fvisibility-inlines-hidden is used.
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else()
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check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG)
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append_if(SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG "-fvisibility-inlines-hidden" CMAKE_CXX_FLAGS)
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endif()
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endif()
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endif()
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if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
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# TODO: support other platforms and toolchains.
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if( LLVM_BUILD_32_BITS )
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message(STATUS "Building 32 bits executables and libraries.")
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add_llvm_definitions( -m32 )
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -m32")
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set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m32")
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set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -m32")
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endif( LLVM_BUILD_32_BITS )
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endif( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
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if (LLVM_BUILD_STATIC)
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static")
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endif()
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if( XCODE )
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# For Xcode enable several build settings that correspond to
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# many warnings that are on by default in Clang but are
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# not enabled for historical reasons. For versions of Xcode
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# that do not support these options they will simply
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# be ignored.
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set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_ABOUT_RETURN_TYPE "YES")
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set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_ABOUT_MISSING_NEWLINE "YES")
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set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_VALUE "YES")
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set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_VARIABLE "YES")
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set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_SIGN_COMPARE "YES")
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set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_FUNCTION "YES")
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set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED "YES")
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set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_HIDDEN_VIRTUAL_FUNCTIONS "YES")
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set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNINITIALIZED_AUTOS "YES")
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set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_BOOL_CONVERSION "YES")
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set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_EMPTY_BODY "YES")
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set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_ENUM_CONVERSION "YES")
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set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_INT_CONVERSION "YES")
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set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_CONSTANT_CONVERSION "YES")
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set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_NON_VIRTUAL_DESTRUCTOR "YES")
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endif()
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# On Win32 using MS tools, provide an option to set the number of parallel jobs
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# to use.
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if( MSVC_IDE )
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set(LLVM_COMPILER_JOBS "0" CACHE STRING
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"Number of parallel compiler jobs. 0 means use all processors. Default is 0.")
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if( NOT LLVM_COMPILER_JOBS STREQUAL "1" )
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if( LLVM_COMPILER_JOBS STREQUAL "0" )
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add_llvm_definitions( /MP )
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else()
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message(STATUS "Number of parallel compiler jobs set to " ${LLVM_COMPILER_JOBS})
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add_llvm_definitions( /MP${LLVM_COMPILER_JOBS} )
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endif()
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else()
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message(STATUS "Parallel compilation disabled")
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endif()
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endif()
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if( MSVC )
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include(ChooseMSVCCRT)
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if( NOT (${CMAKE_VERSION} VERSION_LESS 2.8.11) )
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# set stack reserved size to ~10MB
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# CMake previously automatically set this value for MSVC builds, but the
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# behavior was changed in CMake 2.8.11 (Issue 12437) to use the MSVC default
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# value (1 MB) which is not enough for us in tasks such as parsing recursive
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# C++ templates in Clang.
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /STACK:10000000")
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endif()
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if( MSVC11 )
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add_llvm_definitions(-D_VARIADIC_MAX=10)
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endif()
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# Add definitions that make MSVC much less annoying.
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add_llvm_definitions(
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# For some reason MS wants to deprecate a bunch of standard functions...
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-D_CRT_SECURE_NO_DEPRECATE
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-D_CRT_SECURE_NO_WARNINGS
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-D_CRT_NONSTDC_NO_DEPRECATE
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-D_CRT_NONSTDC_NO_WARNINGS
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-D_SCL_SECURE_NO_DEPRECATE
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-D_SCL_SECURE_NO_WARNINGS
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)
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set(msvc_warning_flags
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# Disabled warnings.
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-wd4146 # Suppress 'unary minus operator applied to unsigned type, result still unsigned'
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-wd4180 # Suppress 'qualifier applied to function type has no meaning; ignored'
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-wd4244 # Suppress ''argument' : conversion from 'type1' to 'type2', possible loss of data'
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-wd4258 # Suppress ''var' : definition from the for loop is ignored; the definition from the enclosing scope is used'
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-wd4267 # Suppress ''var' : conversion from 'size_t' to 'type', possible loss of data'
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-wd4291 # Suppress ''declaration' : no matching operator delete found; memory will not be freed if initialization throws an exception'
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-wd4345 # Suppress 'behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized'
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-wd4351 # Suppress 'new behavior: elements of array 'array' will be default initialized'
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-wd4355 # Suppress ''this' : used in base member initializer list'
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-wd4456 # Suppress 'declaration of 'var' hides local variable'
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-wd4457 # Suppress 'declaration of 'var' hides function parameter'
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-wd4458 # Suppress 'declaration of 'var' hides class member'
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-wd4459 # Suppress 'declaration of 'var' hides global declaration'
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-wd4503 # Suppress ''identifier' : decorated name length exceeded, name was truncated'
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-wd4624 # Suppress ''derived class' : destructor could not be generated because a base class destructor is inaccessible'
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-wd4722 # Suppress 'function' : destructor never returns, potential memory leak
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-wd4800 # Suppress ''type' : forcing value to bool 'true' or 'false' (performance warning)'
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-wd4100 # Suppress 'unreferenced formal parameter'
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-wd4127 # Suppress 'conditional expression is constant'
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-wd4512 # Suppress 'assignment operator could not be generated'
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-wd4505 # Suppress 'unreferenced local function has been removed'
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-wd4610 # Suppress '<class> can never be instantiated'
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-wd4510 # Suppress 'default constructor could not be generated'
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-wd4702 # Suppress 'unreachable code'
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-wd4245 # Suppress 'signed/unsigned mismatch'
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-wd4706 # Suppress 'assignment within conditional expression'
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-wd4310 # Suppress 'cast truncates constant value'
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-wd4701 # Suppress 'potentially uninitialized local variable'
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-wd4703 # Suppress 'potentially uninitialized local pointer variable'
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-wd4389 # Suppress 'signed/unsigned mismatch'
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-wd4611 # Suppress 'interaction between '_setjmp' and C++ object destruction is non-portable'
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-wd4805 # Suppress 'unsafe mix of type <type> and type <type> in operation'
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-wd4204 # Suppress 'nonstandard extension used : non-constant aggregate initializer'
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-wd4577 # Suppress 'noexcept used with no exception handling mode specified; termination on exception is not guaranteed'
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-wd4091 # Suppress 'typedef: ignored on left of '' when no variable is declared'
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# Ideally, we'd like this warning to be enabled, but MSVC 2013 doesn't
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# support the 'aligned' attribute in the way that clang sources requires (for
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# any code that uses the LLVM_ALIGNAS macro), so this is must be disabled to
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# avoid unwanted alignment warnings.
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# When we switch to requiring a version of MSVC that supports the 'alignas'
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# specifier (MSVC 2015?) this warning can be re-enabled.
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-wd4324 # Suppress 'structure was padded due to __declspec(align())'
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# Promoted warnings.
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-w14062 # Promote 'enumerator in switch of enum is not handled' to level 1 warning.
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# Promoted warnings to errors.
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-we4238 # Promote 'nonstandard extension used : class rvalue used as lvalue' to error.
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)
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# Enable warnings
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if (LLVM_ENABLE_WARNINGS)
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append("/W4" msvc_warning_flags)
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# CMake appends /W3 by default, and having /W3 followed by /W4 will result in
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# cl : Command line warning D9025 : overriding '/W3' with '/W4'. Since this is
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# a command line warning and not a compiler warning, it cannot be suppressed except
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# by fixing the command line.
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string(REGEX REPLACE " /W[0-4]" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
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string(REGEX REPLACE " /W[0-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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if (LLVM_ENABLE_PEDANTIC)
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# No MSVC equivalent available
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endif (LLVM_ENABLE_PEDANTIC)
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endif (LLVM_ENABLE_WARNINGS)
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if (LLVM_ENABLE_WERROR)
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append("/WX" msvc_warning_flags)
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endif (LLVM_ENABLE_WERROR)
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foreach(flag ${msvc_warning_flags})
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append("${flag}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
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endforeach(flag)
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# Disable sized deallocation if the flag is supported. MSVC fails to compile
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# the operator new overload in User otherwise.
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check_c_compiler_flag("/WX /Zc:sizedDealloc-" SUPPORTS_SIZED_DEALLOC)
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append_if(SUPPORTS_SIZED_DEALLOC "/Zc:sizedDealloc-" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
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elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
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if (LLVM_ENABLE_WARNINGS)
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append("-Wall -W -Wno-unused-parameter -Wwrite-strings" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
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append("-Wcast-qual" CMAKE_CXX_FLAGS)
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# Turn off missing field initializer warnings for gcc to avoid noise from
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# false positives with empty {}. Turn them on otherwise (they're off by
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# default for clang).
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check_cxx_compiler_flag("-Wmissing-field-initializers" CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG)
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if (CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG)
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if (CMAKE_COMPILER_IS_GNUCXX)
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append("-Wno-missing-field-initializers" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
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else()
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append("-Wmissing-field-initializers" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
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endif()
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endif()
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append_if(LLVM_ENABLE_PEDANTIC "-pedantic -Wno-long-long" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
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add_flag_if_supported("-Wcovered-switch-default" COVERED_SWITCH_DEFAULT_FLAG)
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append_if(USE_NO_UNINITIALIZED "-Wno-uninitialized" CMAKE_CXX_FLAGS)
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|
append_if(USE_NO_MAYBE_UNINITIALIZED "-Wno-maybe-uninitialized" CMAKE_CXX_FLAGS)
|
|
|
|
# Check if -Wnon-virtual-dtor warns even though the class is marked final.
|
|
# If it does, don't add it. So it won't be added on clang 3.4 and older.
|
|
# This also catches cases when -Wnon-virtual-dtor isn't supported by
|
|
# the compiler at all.
|
|
set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
|
|
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -std=c++11 -Werror=non-virtual-dtor")
|
|
CHECK_CXX_SOURCE_COMPILES("class base {public: virtual void anchor();protected: ~base();};
|
|
class derived final : public base { public: ~derived();};
|
|
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)
|
|
|
|
# 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()
|
|
endif (LLVM_ENABLE_WARNINGS)
|
|
append_if(LLVM_ENABLE_WERROR "-Werror" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
|
|
if (NOT LLVM_ENABLE_TIMESTAMPS)
|
|
add_flag_if_supported("-Werror=date-time" WERROR_DATE_TIME)
|
|
endif ()
|
|
if (LLVM_ENABLE_CXX1Y)
|
|
check_cxx_compiler_flag("-std=c++1y" CXX_SUPPORTS_CXX1Y)
|
|
append_if(CXX_SUPPORTS_CXX1Y "-std=c++1y" CMAKE_CXX_FLAGS)
|
|
else()
|
|
check_cxx_compiler_flag("-std=c++11" CXX_SUPPORTS_CXX11)
|
|
if (CXX_SUPPORTS_CXX11)
|
|
if (CYGWIN OR MINGW)
|
|
# MinGW and Cygwin are a bit stricter and lack things like
|
|
# 'strdup', 'stricmp', etc in c++11 mode.
|
|
append("-std=gnu++11" CMAKE_CXX_FLAGS)
|
|
else()
|
|
append("-std=c++11" CMAKE_CXX_FLAGS)
|
|
endif()
|
|
else()
|
|
message(FATAL_ERROR "LLVM requires C++11 support but the '-std=c++11' flag isn't supported.")
|
|
endif()
|
|
endif()
|
|
if (LLVM_ENABLE_MODULES)
|
|
set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
|
|
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fmodules -fcxx-modules")
|
|
# 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_if(CXX_SUPPORTS_MODULES "-fmodules" CMAKE_C_FLAGS)
|
|
append_if(CXX_SUPPORTS_MODULES "-fmodules -fcxx-modules" CMAKE_CXX_FLAGS)
|
|
else()
|
|
message(FATAL_ERROR "LLVM_ENABLE_MODULES is not supported by this compiler")
|
|
endif()
|
|
endif(LLVM_ENABLE_MODULES)
|
|
endif( MSVC )
|
|
|
|
macro(append_common_sanitizer_flags)
|
|
# 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")
|
|
add_flag_if_supported("-O1" O1)
|
|
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 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("-fsanitize=undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all"
|
|
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 "Address;Undefined" OR
|
|
LLVM_USE_SANITIZER STREQUAL "Undefined;Address")
|
|
append_common_sanitizer_flags()
|
|
append("-fsanitize=address,undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all"
|
|
CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
|
|
else()
|
|
message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")
|
|
endif()
|
|
else()
|
|
message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
|
|
endif()
|
|
if (LLVM_USE_SANITIZE_COVERAGE)
|
|
append("-fsanitize-coverage=edge,indirect-calls,8bit-counters,trace-cmp" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
|
|
endif()
|
|
endif()
|
|
|
|
# Turn on -gsplit-dwarf if requested
|
|
if(LLVM_USE_SPLIT_DWARF)
|
|
add_definitions("-gsplit-dwarf")
|
|
endif()
|
|
|
|
add_llvm_definitions( -D__STDC_CONSTANT_MACROS )
|
|
add_llvm_definitions( -D__STDC_FORMAT_MACROS )
|
|
add_llvm_definitions( -D__STDC_LIMIT_MACROS )
|
|
|
|
# clang doesn't print colored diagnostics when invoked from Ninja
|
|
if (UNIX AND
|
|
CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND
|
|
CMAKE_GENERATOR STREQUAL "Ninja")
|
|
append("-fcolor-diagnostics" CMAKE_C_FLAGS CMAKE_CXX_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 WIN32)
|
|
if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND
|
|
NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
|
|
check_c_compiler_flag("-Werror -fno-function-sections" C_SUPPORTS_FNO_FUNCTION_SECTIONS)
|
|
if (C_SUPPORTS_FNO_FUNCTION_SECTIONS)
|
|
# Don't add -ffunction-section if it can be disabled with -fno-function-sections.
|
|
# Doing so will break sanitizers.
|
|
add_flag_if_supported("-ffunction-sections" FFUNCTION_SECTIONS)
|
|
endif()
|
|
add_flag_if_supported("-fdata-sections" FDATA_SECTIONS)
|
|
endif()
|
|
endif()
|
|
|
|
if(CYGWIN OR MINGW)
|
|
# Prune --out-implib from executables. It doesn't make sense even
|
|
# with --export-all-symbols.
|
|
string(REGEX REPLACE "-Wl,--out-implib,[^ ]+ " " "
|
|
CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_LINK_EXECUTABLE}")
|
|
string(REGEX REPLACE "-Wl,--out-implib,[^ ]+ " " "
|
|
CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE}")
|
|
endif()
|
|
|
|
if(MSVC)
|
|
# Remove flags here, for exceptions and RTTI.
|
|
# Each target property or source property should be responsible to control
|
|
# them.
|
|
# CL.EXE complains to override flags like "/GR /GR-".
|
|
string(REGEX REPLACE "(^| ) */EH[-cs]+ *( |$)" "\\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()
|
|
|
|
# Plugin support
|
|
# FIXME: Make this configurable.
|
|
if(WIN32 OR CYGWIN)
|
|
if(BUILD_SHARED_LIBS)
|
|
set(LLVM_ENABLE_PLUGINS ON)
|
|
else()
|
|
set(LLVM_ENABLE_PLUGINS OFF)
|
|
endif()
|
|
else()
|
|
set(LLVM_ENABLE_PLUGINS ON)
|
|
endif()
|