202 lines
7.3 KiB
CMake
202 lines
7.3 KiB
CMake
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# 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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include(AddLLVMDefinitions)
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if( CMAKE_COMPILER_IS_GNUCXX )
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set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
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elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
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set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
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endif()
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# Run-time build mode; It is used for unittests.
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if(MSVC_IDE)
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# Expect "$(Configuration)", "$(OutDir)", etc.
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# It is expanded by msbuild or similar.
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set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}")
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elseif(NOT CMAKE_BUILD_TYPE STREQUAL "")
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# Expect "Release" "Debug", etc.
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# Or unittests could not run.
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set(RUNTIME_BUILD_MODE ${CMAKE_BUILD_TYPE})
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else()
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# It might be "."
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set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}")
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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 Release builds cmake automatically defines NDEBUG, so we
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# explicitly undefine it:
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if( uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
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add_definitions( -UNDEBUG )
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endif()
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else()
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if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
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if( NOT MSVC_IDE AND NOT XCODE )
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add_definitions( -DNDEBUG )
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endif()
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endif()
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endif()
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if(WIN32)
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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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set(LTDL_SHLIB_EXT ".dll")
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set(EXEEXT ".exe")
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# Maximum path length is 160 for non-unicode paths
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set(MAXPATHLEN 160)
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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(LTDL_SHLIB_EXT ".dylib")
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else(APPLE)
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set(LTDL_SHLIB_EXT ".so")
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endif(APPLE)
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set(EXEEXT "")
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# FIXME: Maximum path length is currently set to 'safe' fixed value
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set(MAXPATHLEN 2024)
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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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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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include(CheckCXXCompilerFlag)
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check_cxx_compiler_flag("-fPIC" SUPPORTS_FPIC_FLAG)
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if( SUPPORTS_FPIC_FLAG )
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message(STATUS "Building with -fPIC")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
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else( SUPPORTS_FPIC_FLAG )
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message(WARNING "-fPIC not supported.")
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endif()
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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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if( SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG )
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-inlines-hidden")
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endif()
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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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list(APPEND CMAKE_EXE_LINKER_FLAGS -m32)
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list(APPEND CMAKE_SHARED_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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# 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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if (MSVC10)
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message(FATAL_ERROR
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"Due to a bug in CMake only 0 and 1 is supported for "
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"LLVM_COMPILER_JOBS when generating for Visual Studio 2010")
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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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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( 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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-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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-wd4224 # Suppress 'nonstandard extension used : formal parameter 'identifier' was previously defined as a type'
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-wd4244 # Suppress ''argument' : conversion from 'type1' to 'type2', possible loss of data'
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-wd4267 # Suppress ''var' : conversion from 'size_t' to 'type', possible loss of data'
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-wd4275 # Suppress 'An exported class was derived from a class that was not exported.'
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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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-wd4503 # Suppress ''identifier' : decorated name length exceeded, name was truncated'
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-wd4551 # Suppress 'function call missing argument list'
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-wd4624 # Suppress ''derived class' : destructor could not be generated because a base class destructor is inaccessible'
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-wd4715 # Suppress ''function' : not all control paths return a value'
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-wd4800 # Suppress ''type' : forcing value to bool 'true' or 'false' (performance warning)'
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-wd4065 # Suppress 'switch statement contains 'default' but no 'case' labels'
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-wd4181 # Suppress 'qualifier applied to reference type; ignored'
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-w14062 # Promote "enumerator in switch of enum is not handled" to level 1 warning.
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)
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# Enable warnings
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if (LLVM_ENABLE_WARNINGS)
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add_llvm_definitions( /W4 /Wall )
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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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add_llvm_definitions( /WX )
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endif (LLVM_ENABLE_WERROR)
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elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
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if (LLVM_ENABLE_WARNINGS)
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add_llvm_definitions( -Wall -W -Wno-unused-parameter -Wwrite-strings )
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if (LLVM_ENABLE_PEDANTIC)
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add_llvm_definitions( -pedantic -Wno-long-long )
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endif (LLVM_ENABLE_PEDANTIC)
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check_cxx_compiler_flag("-Werror -Wcovered-switch-default" SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG)
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if( SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG )
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add_llvm_definitions( -Wcovered-switch-default )
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endif()
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endif (LLVM_ENABLE_WARNINGS)
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if (LLVM_ENABLE_WERROR)
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add_llvm_definitions( -Werror )
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endif (LLVM_ENABLE_WERROR)
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endif( MSVC )
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add_llvm_definitions( -D__STDC_CONSTANT_MACROS )
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add_llvm_definitions( -D__STDC_FORMAT_MACROS )
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add_llvm_definitions( -D__STDC_LIMIT_MACROS )
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