1 # This CMake module is responsible for interpreting the user defined LLVM_
2 # options and executing the appropriate CMake commands to realize the users'
5 include(AddLLVMDefinitions)
7 if( CMAKE_COMPILER_IS_GNUCXX )
8 set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
9 elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
10 set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
13 # Run-time build mode; It is used for unittests.
15 # Expect "$(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 ${CMAKE_BUILD_TYPE})
24 set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}")
27 if( LLVM_ENABLE_ASSERTIONS )
28 # MSVC doesn't like _DEBUG on release builds. See PR 4379.
30 add_definitions( -D_DEBUG )
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 )
38 if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
39 if( NOT MSVC_IDE AND NOT XCODE )
40 add_definitions( -DNDEBUG )
53 set(LTDL_SHLIB_EXT ".dll")
55 # Maximum path length is 160 for non-unicode paths
62 set(LTDL_SHLIB_EXT ".dylib")
64 set(LTDL_SHLIB_EXT ".so")
67 # FIXME: Maximum path length is currently set to 'safe' fixed value
70 MESSAGE(SEND_ERROR "Unable to determine platform")
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.
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.")
93 # MinGW warns if -fvisibility-inlines-hidden is used.
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 "${CMAKE_CXX_FLAGS} -fvisibility-inlines-hidden")
103 if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
104 # TODO: support other platforms and toolchains.
105 if( LLVM_BUILD_32_BITS )
106 message(STATUS "Building 32 bits executables and libraries.")
107 add_llvm_definitions( -m32 )
108 set(CMAKE_EXE_LINKER_FLAGS "${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 )
114 # On Win32 using MS tools, provide an option to set the number of parallel jobs
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 )
125 "Due to a bug in CMake only 0 and 1 is supported for "
126 "LLVM_COMPILER_JOBS when generating for Visual Studio 2010")
128 message(STATUS "Number of parallel compiler jobs set to " ${LLVM_COMPILER_JOBS})
129 add_llvm_definitions( /MP${LLVM_COMPILER_JOBS} )
133 message(STATUS "Parallel compilation disabled")
138 include(ChooseMSVCCRT)
141 add_llvm_definitions(-D_VARIADIC_MAX=10)
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
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)'
174 -w14062 # Promote 'enumerator in switch of enum is not handled' to level 1 warning.
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.
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 )
201 endif (LLVM_ENABLE_WARNINGS)
202 if (LLVM_ENABLE_WERROR)
203 add_llvm_definitions( -Werror )
204 endif (LLVM_ENABLE_WERROR)
207 add_llvm_definitions( -D__STDC_CONSTANT_MACROS )
208 add_llvm_definitions( -D__STDC_FORMAT_MACROS )
209 add_llvm_definitions( -D__STDC_LIMIT_MACROS )