1 # This CMake module is responsible for interpreting the user defined LLVM_ 2 # options and executing the appropriate CMake commands to realize the users' 3 # selections. 4 5 include(AddLLVMDefinitions) 6 7 if( CMAKE_COMPILER_IS_GNUCXX ) 8 set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON) 9 elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" ) 10 set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON) 11 endif() 12 13 # Run-time build mode; It is used for unittests. 14 if(MSVC_IDE) 15 # Expect "$(Configuration)", "$(OutDir)", etc. 16 # It is expanded by msbuild or similar. 17 set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}") 18 elseif(NOT CMAKE_BUILD_TYPE STREQUAL "") 19 # Expect "Release" "Debug", etc. 20 # Or unittests could not run. 21 set(RUNTIME_BUILD_MODE ${CMAKE_BUILD_TYPE}) 22 else() 23 # It might be "." 24 set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}") 25 endif() 26 27 if( LLVM_ENABLE_ASSERTIONS ) 28 # MSVC doesn't like _DEBUG on release builds. See PR 4379. 29 if( NOT MSVC ) 30 add_definitions( -D_DEBUG ) 31 endif() 32 # On Release builds cmake automatically defines NDEBUG, so we 33 # explicitly undefine it: 34 if( uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" ) 35 add_definitions( -UNDEBUG ) 36 endif() 37 else() 38 if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" ) 39 if( NOT MSVC_IDE AND NOT XCODE ) 40 add_definitions( -DNDEBUG ) 41 endif() 42 endif() 43 endif() 44 45 if(WIN32) 46 if(CYGWIN) 47 set(LLVM_ON_WIN32 0) 48 set(LLVM_ON_UNIX 1) 49 else(CYGWIN) 50 set(LLVM_ON_WIN32 1) 51 set(LLVM_ON_UNIX 0) 52 endif(CYGWIN) 53 set(LTDL_SHLIB_EXT ".dll") 54 set(EXEEXT ".exe") 55 # Maximum path length is 160 for non-unicode paths 56 set(MAXPATHLEN 160) 57 else(WIN32) 58 if(UNIX) 59 set(LLVM_ON_WIN32 0) 60 set(LLVM_ON_UNIX 1) 61 if(APPLE) 62 set(LTDL_SHLIB_EXT ".dylib") 63 else(APPLE) 64 set(LTDL_SHLIB_EXT ".so") 65 endif(APPLE) 66 set(EXEEXT "") 67 # FIXME: Maximum path length is currently set to 'safe' fixed value 68 set(MAXPATHLEN 2024) 69 else(UNIX) 70 MESSAGE(SEND_ERROR "Unable to determine platform") 71 endif(UNIX) 72 endif(WIN32) 73 74 if( LLVM_ENABLE_PIC ) 75 if( XCODE ) 76 # Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't 77 # know how to disable this, so just force ENABLE_PIC off for now. 78 message(WARNING "-fPIC not supported with Xcode.") 79 elseif( WIN32 OR CYGWIN) 80 # On Windows all code is PIC. MinGW warns if -fPIC is used. 81 else() 82 include(CheckCXXCompilerFlag) 83 check_cxx_compiler_flag("-fPIC" SUPPORTS_FPIC_FLAG) 84 if( SUPPORTS_FPIC_FLAG ) 85 message(STATUS "Building with -fPIC") 86 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC") 87 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC") 88 else( SUPPORTS_FPIC_FLAG ) 89 message(WARNING "-fPIC not supported.") 90 endif() 91 92 if( WIN32 OR CYGWIN) 93 # MinGW warns if -fvisibility-inlines-hidden is used. 94 else() 95 check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG) 96 if( SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG ) 97 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-inlines-hidden") 98 endif() 99 endif() 100 endif() 101 endif() 102 103 if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 ) 104 # TODO: support other platforms and toolchains. 105 if( LLVM_BUILD_32_BITS ) 106 message(STATUS "Building 32 bits executables and libraries.") 107 add_llvm_definitions( -m32 ) 108 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -m32") 109 set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m32") 110 set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -m32") 111 endif( LLVM_BUILD_32_BITS ) 112 endif( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 ) 113 114 # On Win32 using MS tools, provide an option to set the number of parallel jobs 115 # to use. 116 if( MSVC_IDE ) 117 set(LLVM_COMPILER_JOBS "0" CACHE STRING 118 "Number of parallel compiler jobs. 0 means use all processors. Default is 0.") 119 if( NOT LLVM_COMPILER_JOBS STREQUAL "1" ) 120 if( LLVM_COMPILER_JOBS STREQUAL "0" ) 121 add_llvm_definitions( /MP ) 122 else() 123 if (MSVC10) 124 message(FATAL_ERROR 125 "Due to a bug in CMake only 0 and 1 is supported for " 126 "LLVM_COMPILER_JOBS when generating for Visual Studio 2010") 127 else() 128 message(STATUS "Number of parallel compiler jobs set to " ${LLVM_COMPILER_JOBS}) 129 add_llvm_definitions( /MP${LLVM_COMPILER_JOBS} ) 130 endif() 131 endif() 132 else() 133 message(STATUS "Parallel compilation disabled") 134 endif() 135 endif() 136 137 if( MSVC ) 138 include(ChooseMSVCCRT) 139 140 if( MSVC11 ) 141 add_llvm_definitions(-D_VARIADIC_MAX=10) 142 endif() 143 144 # Add definitions that make MSVC much less annoying. 145 add_llvm_definitions( 146 # For some reason MS wants to deprecate a bunch of standard functions... 147 -D_CRT_SECURE_NO_DEPRECATE 148 -D_CRT_SECURE_NO_WARNINGS 149 -D_CRT_NONSTDC_NO_DEPRECATE 150 -D_CRT_NONSTDC_NO_WARNINGS 151 -D_SCL_SECURE_NO_DEPRECATE 152 -D_SCL_SECURE_NO_WARNINGS 153 154 # Disabled warnings. 155 -wd4065 # Suppress 'switch statement contains 'default' but no 'case' labels' 156 -wd4146 # Suppress 'unary minus operator applied to unsigned type, result still unsigned' 157 -wd4180 # Suppress 'qualifier applied to function type has no meaning; ignored' 158 -wd4181 # Suppress 'qualifier applied to reference type; ignored' 159 -wd4224 # Suppress 'nonstandard extension used : formal parameter 'identifier' was previously defined as a type' 160 -wd4244 # Suppress ''argument' : conversion from 'type1' to 'type2', possible loss of data' 161 -wd4267 # Suppress ''var' : conversion from 'size_t' to 'type', possible loss of data' 162 -wd4275 # Suppress 'An exported class was derived from a class that was not exported.' 163 -wd4291 # Suppress ''declaration' : no matching operator delete found; memory will not be freed if initialization throws an exception' 164 -wd4345 # Suppress 'behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized' 165 -wd4351 # Suppress 'new behavior: elements of array 'array' will be default initialized' 166 -wd4355 # Suppress ''this' : used in base member initializer list' 167 -wd4503 # Suppress ''identifier' : decorated name length exceeded, name was truncated' 168 -wd4551 # Suppress 'function call missing argument list' 169 -wd4624 # Suppress ''derived class' : destructor could not be generated because a base class destructor is inaccessible' 170 -wd4715 # Suppress ''function' : not all control paths return a value' 171 -wd4800 # Suppress ''type' : forcing value to bool 'true' or 'false' (performance warning)' 172 173 # Promoted warnings. 174 -w14062 # Promote 'enumerator in switch of enum is not handled' to level 1 warning. 175 176 # Promoted warnings to errors. 177 -we4238 # Promote 'nonstandard extension used : class rvalue used as lvalue' to error. 178 -we4239 # Promote 'nonstandard extension used : 'token' : conversion from 'type' to 'type'' to error. 179 ) 180 181 # Enable warnings 182 if (LLVM_ENABLE_WARNINGS) 183 add_llvm_definitions( /W4 ) 184 if (LLVM_ENABLE_PEDANTIC) 185 # No MSVC equivalent available 186 endif (LLVM_ENABLE_PEDANTIC) 187 endif (LLVM_ENABLE_WARNINGS) 188 if (LLVM_ENABLE_WERROR) 189 add_llvm_definitions( /WX ) 190 endif (LLVM_ENABLE_WERROR) 191 elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE ) 192 if (LLVM_ENABLE_WARNINGS) 193 add_llvm_definitions( -Wall -W -Wno-unused-parameter -Wwrite-strings ) 194 if (LLVM_ENABLE_PEDANTIC) 195 add_llvm_definitions( -pedantic -Wno-long-long ) 196 endif (LLVM_ENABLE_PEDANTIC) 197 check_cxx_compiler_flag("-Werror -Wcovered-switch-default" SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG) 198 if( SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG ) 199 add_llvm_definitions( -Wcovered-switch-default ) 200 endif() 201 endif (LLVM_ENABLE_WARNINGS) 202 if (LLVM_ENABLE_WERROR) 203 add_llvm_definitions( -Werror ) 204 endif (LLVM_ENABLE_WERROR) 205 endif( MSVC ) 206 207 add_llvm_definitions( -D__STDC_CONSTANT_MACROS ) 208 add_llvm_definitions( -D__STDC_FORMAT_MACROS ) 209 add_llvm_definitions( -D__STDC_LIMIT_MACROS ) 210
