1include(AddLLVMDefinitions)
2
3if( CMAKE_COMPILER_IS_GNUCXX )
4  set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
5elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
6  set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
7endif()
8
9# Run-time build mode; It is used for unittests.
10if(MSVC_IDE)
11  # Expect "$(Configuration)", "$(OutDir)", etc.
12  # It is expanded by msbuild or similar.
13  set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}")
14elseif(NOT CMAKE_BUILD_TYPE STREQUAL "")
15  # Expect "Release" "Debug", etc.
16  # Or unittests could not run.
17  set(RUNTIME_BUILD_MODE ${CMAKE_BUILD_TYPE})
18else()
19  # It might be "."
20  set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}")
21endif()
22
23set(LIT_ARGS_DEFAULT "-sv")
24if (MSVC OR XCODE)
25  set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
26endif()
27set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}"
28    CACHE STRING "Default options for lit")
29
30if( LLVM_ENABLE_ASSERTIONS )
31  # MSVC doesn't like _DEBUG on release builds. See PR 4379.
32  if( NOT MSVC )
33    add_definitions( -D_DEBUG )
34  endif()
35  # On Release builds cmake automatically defines NDEBUG, so we
36  # explicitly undefine it:
37  if( uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
38    add_definitions( -UNDEBUG )
39  endif()
40else()
41  if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
42    if( NOT MSVC_IDE AND NOT XCODE )
43      add_definitions( -DNDEBUG )
44    endif()
45  endif()
46endif()
47
48if(WIN32)
49  if(CYGWIN)
50    set(LLVM_ON_WIN32 0)
51    set(LLVM_ON_UNIX 1)
52  else(CYGWIN)
53    set(LLVM_ON_WIN32 1)
54    set(LLVM_ON_UNIX 0)
55
56    # This is effective only on Win32 hosts to use gnuwin32 tools.
57    set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
58  endif(CYGWIN)
59  set(LTDL_SHLIB_EXT ".dll")
60  set(EXEEXT ".exe")
61  # Maximum path length is 160 for non-unicode paths
62  set(MAXPATHLEN 160)
63else(WIN32)
64  if(UNIX)
65    set(LLVM_ON_WIN32 0)
66    set(LLVM_ON_UNIX 1)
67    if(APPLE)
68      set(LTDL_SHLIB_EXT ".dylib")
69    else(APPLE)
70      set(LTDL_SHLIB_EXT ".so")
71    endif(APPLE)
72    set(EXEEXT "")
73    # FIXME: Maximum path length is currently set to 'safe' fixed value
74    set(MAXPATHLEN 2024)
75  else(UNIX)
76    MESSAGE(SEND_ERROR "Unable to determine platform")
77  endif(UNIX)
78endif(WIN32)
79
80if( LLVM_ENABLE_PIC )
81  if( XCODE )
82    # Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't
83    # know how to disable this, so just force ENABLE_PIC off for now.
84    message(WARNING "-fPIC not supported with Xcode.")
85  elseif( WIN32 )
86    # On Windows all code is PIC. MinGW warns if -fPIC is used.
87  else()
88    include(CheckCXXCompilerFlag)
89    check_cxx_compiler_flag("-fPIC" SUPPORTS_FPIC_FLAG)
90    if( SUPPORTS_FPIC_FLAG )
91      message(STATUS "Building with -fPIC")
92      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
93      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
94    else( SUPPORTS_FPIC_FLAG )
95      message(WARNING "-fPIC not supported.")
96    endif()
97  endif()
98endif()
99
100if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
101  # TODO: support other platforms and toolchains.
102  option(LLVM_BUILD_32_BITS "Build 32 bits executables and libraries." OFF)
103  if( LLVM_BUILD_32_BITS )
104    message(STATUS "Building 32 bits executables and libraries.")
105    add_llvm_definitions( -m32 )
106    list(APPEND CMAKE_EXE_LINKER_FLAGS -m32)
107    list(APPEND CMAKE_SHARED_LINKER_FLAGS -m32)
108  endif( LLVM_BUILD_32_BITS )
109endif( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
110
111if( MSVC_IDE AND ( MSVC90 OR MSVC10 ) )
112  # Only Visual Studio 2008 and 2010 officially supports /MP.
113  # Visual Studio 2005 do support it but it's experimental there.
114  set(LLVM_COMPILER_JOBS "0" CACHE STRING
115    "Number of parallel compiler jobs. 0 means use all processors. Default is 0.")
116  if( NOT LLVM_COMPILER_JOBS STREQUAL "1" )
117    if( LLVM_COMPILER_JOBS STREQUAL "0" )
118      add_llvm_definitions( /MP )
119    else()
120      if (MSVC10)
121        message(FATAL_ERROR
122          "Due to a bug in CMake only 0 and 1 is supported for "
123          "LLVM_COMPILER_JOBS when generating for Visual Studio 2010")
124      else()
125        message(STATUS "Number of parallel compiler jobs set to " ${LLVM_COMPILER_JOBS})
126        add_llvm_definitions( /MP${LLVM_COMPILER_JOBS} )
127      endif()
128    endif()
129  else()
130    message(STATUS "Parallel compilation disabled")
131  endif()
132endif()
133
134if( MSVC )
135  include(ChooseMSVCCRT)
136
137  # Add definitions that make MSVC much less annoying.
138  add_llvm_definitions(
139    # For some reason MS wants to deprecate a bunch of standard functions...
140    -D_CRT_SECURE_NO_DEPRECATE
141    -D_CRT_SECURE_NO_WARNINGS
142    -D_CRT_NONSTDC_NO_DEPRECATE
143    -D_CRT_NONSTDC_NO_WARNINGS
144    -D_SCL_SECURE_NO_DEPRECATE
145    -D_SCL_SECURE_NO_WARNINGS
146
147    -wd4146 # Suppress 'unary minus operator applied to unsigned type, result still unsigned'
148    -wd4180 # Suppress 'qualifier applied to function type has no meaning; ignored'
149    -wd4224 # Suppress 'nonstandard extension used : formal parameter 'identifier' was previously defined as a type'
150    -wd4244 # Suppress ''argument' : conversion from 'type1' to 'type2', possible loss of data'
151    -wd4267 # Suppress ''var' : conversion from 'size_t' to 'type', possible loss of data'
152    -wd4275 # Suppress 'An exported class was derived from a class that was not exported.'
153    -wd4291 # Suppress ''declaration' : no matching operator delete found; memory will not be freed if initialization throws an exception'
154    -wd4345 # Suppress 'behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized'
155    -wd4351 # Suppress 'new behavior: elements of array 'array' will be default initialized'
156    -wd4355 # Suppress ''this' : used in base member initializer list'
157    -wd4503 # Suppress ''identifier' : decorated name length exceeded, name was truncated'
158    -wd4551 # Suppress 'function call missing argument list'
159    -wd4624 # Suppress ''derived class' : destructor could not be generated because a base class destructor is inaccessible'
160    -wd4715 # Suppress ''function' : not all control paths return a value'
161    -wd4800 # Suppress ''type' : forcing value to bool 'true' or 'false' (performance warning)'
162    -wd4065 # Suppress 'switch statement contains 'default' but no 'case' labels'
163    -wd4181 # Suppress 'qualifier applied to reference type; ignored'
164    -w14062 # Promote "enumerator in switch of enum is not handled" to level 1 warning.
165    )
166
167  # Enable warnings
168  if (LLVM_ENABLE_WARNINGS)
169    add_llvm_definitions( /W4 /Wall )
170    if (LLVM_ENABLE_PEDANTIC)
171      # No MSVC equivalent available
172    endif (LLVM_ENABLE_PEDANTIC)
173  endif (LLVM_ENABLE_WARNINGS)
174  if (LLVM_ENABLE_WERROR)
175    add_llvm_definitions( /WX )
176  endif (LLVM_ENABLE_WERROR)
177elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
178  if (LLVM_ENABLE_WARNINGS)
179    add_llvm_definitions( -Wall -W -Wno-unused-parameter -Wwrite-strings )
180    if (LLVM_ENABLE_PEDANTIC)
181      add_llvm_definitions( -pedantic -Wno-long-long )
182    endif (LLVM_ENABLE_PEDANTIC)
183  endif (LLVM_ENABLE_WARNINGS)
184  if (LLVM_ENABLE_WERROR)
185    add_llvm_definitions( -Werror )
186  endif (LLVM_ENABLE_WERROR)
187endif( MSVC )
188
189add_llvm_definitions( -D__STDC_CONSTANT_MACROS )
190add_llvm_definitions( -D__STDC_FORMAT_MACROS )
191add_llvm_definitions( -D__STDC_LIMIT_MACROS )
192
193option(LLVM_INCLUDE_TESTS "Generate build targets for the LLVM unit tests." ON)
194