| # This CMake module is responsible for interpreting the user defined LLVM_ |
| # options and executing the appropriate CMake commands to realize the users' |
| # selections. |
| |
| include(AddLLVMDefinitions) |
| include(CheckCCompilerFlag) |
| include(CheckCXXCompilerFlag) |
| |
| if( CMAKE_COMPILER_IS_GNUCXX ) |
| set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON) |
| elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" ) |
| set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON) |
| endif() |
| |
| if( LLVM_ENABLE_ASSERTIONS ) |
| # MSVC doesn't like _DEBUG on release builds. See PR 4379. |
| if( NOT MSVC ) |
| add_definitions( -D_DEBUG ) |
| endif() |
| # On Release builds cmake automatically defines NDEBUG, so we |
| # explicitly undefine it: |
| if( uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" ) |
| add_definitions( -UNDEBUG ) |
| endif() |
| else() |
| if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" ) |
| if( NOT MSVC_IDE AND NOT XCODE ) |
| add_definitions( -DNDEBUG ) |
| endif() |
| endif() |
| endif() |
| |
| if(WIN32) |
| if(CYGWIN) |
| set(LLVM_ON_WIN32 0) |
| set(LLVM_ON_UNIX 1) |
| else(CYGWIN) |
| set(LLVM_ON_WIN32 1) |
| set(LLVM_ON_UNIX 0) |
| endif(CYGWIN) |
| set(LTDL_SHLIB_EXT ".dll") |
| set(EXEEXT ".exe") |
| # Maximum path length is 160 for non-unicode paths |
| set(MAXPATHLEN 160) |
| else(WIN32) |
| if(UNIX) |
| set(LLVM_ON_WIN32 0) |
| set(LLVM_ON_UNIX 1) |
| if(APPLE) |
| set(LTDL_SHLIB_EXT ".dylib") |
| else(APPLE) |
| set(LTDL_SHLIB_EXT ".so") |
| endif(APPLE) |
| set(EXEEXT "") |
| # FIXME: Maximum path length is currently set to 'safe' fixed value |
| set(MAXPATHLEN 2024) |
| else(UNIX) |
| MESSAGE(SEND_ERROR "Unable to determine platform") |
| endif(UNIX) |
| endif(WIN32) |
| |
| if( LLVM_ENABLE_PIC ) |
| if( XCODE ) |
| # Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't |
| # know how to disable this, so just force ENABLE_PIC off for now. |
| message(WARNING "-fPIC not supported with Xcode.") |
| elseif( WIN32 OR CYGWIN) |
| # On Windows all code is PIC. MinGW warns if -fPIC is used. |
| else() |
| check_cxx_compiler_flag("-fPIC" SUPPORTS_FPIC_FLAG) |
| if( SUPPORTS_FPIC_FLAG ) |
| message(STATUS "Building with -fPIC") |
| set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC") |
| set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC") |
| else( SUPPORTS_FPIC_FLAG ) |
| message(WARNING "-fPIC not supported.") |
| endif() |
| |
| if( WIN32 OR CYGWIN) |
| # MinGW warns if -fvisibility-inlines-hidden is used. |
| else() |
| check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG) |
| if( SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG ) |
| set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-inlines-hidden") |
| endif() |
| endif() |
| endif() |
| 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.") |
| add_llvm_definitions( -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") |
| endif( LLVM_BUILD_32_BITS ) |
| endif( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 ) |
| |
| # 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_llvm_definitions( /MP ) |
| else() |
| if (MSVC10) |
| message(FATAL_ERROR |
| "Due to a bug in CMake only 0 and 1 is supported for " |
| "LLVM_COMPILER_JOBS when generating for Visual Studio 2010") |
| else() |
| message(STATUS "Number of parallel compiler jobs set to " ${LLVM_COMPILER_JOBS}) |
| add_llvm_definitions( /MP${LLVM_COMPILER_JOBS} ) |
| endif() |
| endif() |
| else() |
| message(STATUS "Parallel compilation disabled") |
| endif() |
| endif() |
| |
| if( MSVC ) |
| include(ChooseMSVCCRT) |
| |
| if( MSVC11 ) |
| add_llvm_definitions(-D_VARIADIC_MAX=10) |
| endif() |
| |
| # Add definitions that make MSVC much less annoying. |
| add_llvm_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 |
| |
| # Disabled warnings. |
| -wd4065 # Suppress 'switch statement contains 'default' but no 'case' labels' |
| -wd4146 # Suppress 'unary minus operator applied to unsigned type, result still unsigned' |
| -wd4180 # Suppress 'qualifier applied to function type has no meaning; ignored' |
| -wd4181 # Suppress 'qualifier applied to reference type; ignored' |
| -wd4224 # Suppress 'nonstandard extension used : formal parameter 'identifier' was previously defined as a type' |
| -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' |
| -wd4275 # Suppress 'An exported class was derived from a class that was not exported.' |
| -wd4291 # Suppress ''declaration' : no matching operator delete found; memory will not be freed if initialization throws an exception' |
| -wd4345 # Suppress 'behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized' |
| -wd4351 # Suppress 'new behavior: elements of array 'array' will be default initialized' |
| -wd4355 # Suppress ''this' : used in base member initializer list' |
| -wd4503 # Suppress ''identifier' : decorated name length exceeded, name was truncated' |
| -wd4551 # Suppress 'function call missing argument list' |
| -wd4624 # Suppress ''derived class' : destructor could not be generated because a base class destructor is inaccessible' |
| -wd4715 # Suppress ''function' : not all control paths return a value' |
| -wd4722 # Suppress ''function' : destructor never returns, potential memory leak' |
| -wd4800 # Suppress ''type' : forcing value to bool 'true' or 'false' (performance warning)' |
| |
| # 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. |
| ) |
| |
| # Enable warnings |
| if (LLVM_ENABLE_WARNINGS) |
| add_llvm_definitions( /W4 ) |
| if (LLVM_ENABLE_PEDANTIC) |
| # No MSVC equivalent available |
| endif (LLVM_ENABLE_PEDANTIC) |
| endif (LLVM_ENABLE_WARNINGS) |
| if (LLVM_ENABLE_WERROR) |
| add_llvm_definitions( /WX ) |
| endif (LLVM_ENABLE_WERROR) |
| elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE ) |
| if (LLVM_ENABLE_WARNINGS) |
| add_llvm_definitions( -Wall -W -Wno-unused-parameter -Wwrite-strings ) |
| |
| # 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) |
| add_llvm_definitions( -Wno-missing-field-initializers ) |
| else() |
| add_llvm_definitions( -Wmissing-field-initializers ) |
| endif() |
| endif() |
| |
| if (LLVM_ENABLE_PEDANTIC) |
| add_llvm_definitions( -pedantic -Wno-long-long ) |
| check_cxx_compiler_flag("-Werror -Wnested-anon-types" CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG) |
| if( CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG ) |
| set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-nested-anon-types" ) |
| endif() |
| endif (LLVM_ENABLE_PEDANTIC) |
| check_cxx_compiler_flag("-Werror -Wcovered-switch-default" CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG) |
| if( CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG ) |
| set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wcovered-switch-default" ) |
| endif() |
| check_c_compiler_flag("-Werror -Wcovered-switch-default" C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG) |
| if( C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG ) |
| set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wcovered-switch-default" ) |
| endif() |
| if (USE_NO_UNINITIALIZED) |
| set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-uninitialized") |
| endif() |
| if (USE_NO_MAYBE_UNINITIALIZED) |
| set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-maybe-uninitialized") |
| endif() |
| endif (LLVM_ENABLE_WARNINGS) |
| if (LLVM_ENABLE_WERROR) |
| add_llvm_definitions( -Werror ) |
| endif (LLVM_ENABLE_WERROR) |
| endif( MSVC ) |
| |
| add_llvm_definitions( -D__STDC_CONSTANT_MACROS ) |
| add_llvm_definitions( -D__STDC_FORMAT_MACROS ) |
| add_llvm_definitions( -D__STDC_LIMIT_MACROS ) |
