blob: cfa2a552fce647563695550754f5131f89e893b6 [file] [log] [blame]
Daniel Dunbar10fa2df2011-11-04 19:04:35 +00001# 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
Eric Fiselierebf091d2014-11-15 07:45:31 +00005# This is commonly needed so make sure it's defined before we include anything
6# else.
7string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
8
Jordan Rose31c5b7b2014-02-05 00:02:37 +00009include(HandleLLVMStdlib)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +000010include(AddLLVMDefinitions)
Joe Abbey15d98342012-11-26 02:02:08 +000011include(CheckCCompilerFlag)
Jordan Rose643aa0e2013-03-02 01:00:40 +000012include(CheckCXXCompilerFlag)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +000013
Chandler Carruth83885972014-01-13 22:21:34 +000014if(NOT LLVM_FORCE_USE_OLD_TOOLCHAIN)
15 if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
16 if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
17 message(FATAL_ERROR "Host GCC version must be at least 4.7!")
18 endif()
19 elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
20 if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.1)
David Blaikie260b6582015-11-02 20:05:54 +000021 message(FATAL_ERROR "Host Clang version must be at least 3.1!")
Chandler Carruth83885972014-01-13 22:21:34 +000022 endif()
Chandler Carruthf8f00152014-01-17 09:47:55 +000023
Reid Klecknere13b7652015-02-23 19:07:25 +000024 if (CMAKE_CXX_SIMULATE_ID MATCHES "MSVC")
25 if (CMAKE_CXX_SIMULATE_VERSION VERSION_LESS 18.0)
26 message(FATAL_ERROR "Host Clang must have at least -fms-compatibility-version=18.0")
27 endif()
Zachary Turner66bc9082015-02-25 20:42:19 +000028 set(CLANG_CL 1)
Reid Klecknere13b7652015-02-23 19:07:25 +000029 elseif(NOT LLVM_ENABLE_LIBCXX)
30 # Otherwise, test that we aren't using too old of a version of libstdc++
31 # with the Clang compiler. This is tricky as there is no real way to
32 # check the version of libstdc++ directly. Instead we test for a known
33 # bug in libstdc++4.6 that is fixed in libstdc++4.7.
Chandler Carruthf4144ad2014-01-21 18:09:19 +000034 set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
35 set(OLD_CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
Chandler Carruthf8f00152014-01-17 09:47:55 +000036 set(CMAKE_REQUIRED_FLAGS "-std=c++0x")
37 check_cxx_source_compiles("
38#include <atomic>
39std::atomic<float> x(0.0f);
40int main() { return (float)x; }"
41 LLVM_NO_OLD_LIBSTDCXX)
42 if(NOT LLVM_NO_OLD_LIBSTDCXX)
43 message(FATAL_ERROR "Host Clang must be able to find libstdc++4.7 or newer!")
44 endif()
Chandler Carruthf4144ad2014-01-21 18:09:19 +000045 set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
46 set(CMAKE_REQUIRED_LIBRARIES ${OLD_CMAKE_REQUIRED_LIBRARIES})
Chandler Carruthf8f00152014-01-17 09:47:55 +000047 endif()
Amara Emerson5569381a2014-01-21 16:41:07 +000048 elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
Filipe Cabecinhas3c746932015-02-18 01:12:38 +000049 if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0)
50 message(FATAL_ERROR "Host Visual Studio must be at least 2013")
51 elseif(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0.31101)
52 message(WARNING "Host Visual Studio should at least be 2013 Update 4 (MSVC 18.0.31101)"
53 " due to miscompiles from earlier versions")
Chandler Carruth83885972014-01-13 22:21:34 +000054 endif()
55 endif()
56endif()
57
Reid Kleckner841e5a02016-01-22 23:27:13 +000058if (CMAKE_LINKER MATCHES "lld-link.exe")
59 # Pass /MANIFEST:NO so that CMake doesn't run mt.exe on our binaries. Adding
60 # manifests with mt.exe breaks LLD's symbol tables and takes as much time as
61 # the link. See PR24476.
62 append("/MANIFEST:NO"
63 CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS)
64endif()
65
Oscar Fuentesf4202ba2011-02-03 20:57:36 +000066if( LLVM_ENABLE_ASSERTIONS )
67 # MSVC doesn't like _DEBUG on release builds. See PR 4379.
68 if( NOT MSVC )
69 add_definitions( -D_DEBUG )
70 endif()
Duncan Sands80f122f2013-07-17 09:34:51 +000071 # On non-Debug builds cmake automatically defines NDEBUG, so we
Oscar Fuentesf4202ba2011-02-03 20:57:36 +000072 # explicitly undefine it:
Duncan Sands80f122f2013-07-17 09:34:51 +000073 if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
Oscar Fuentesf4202ba2011-02-03 20:57:36 +000074 add_definitions( -UNDEBUG )
Reid Klecknerc1c01d52013-04-07 01:45:01 +000075 # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
Reid Kleckner472e6b42014-05-19 21:13:41 +000076 foreach (flags_var_to_scrub
77 CMAKE_CXX_FLAGS_RELEASE
78 CMAKE_CXX_FLAGS_RELWITHDEBINFO
79 CMAKE_CXX_FLAGS_MINSIZEREL
80 CMAKE_C_FLAGS_RELEASE
81 CMAKE_C_FLAGS_RELWITHDEBINFO
82 CMAKE_C_FLAGS_MINSIZEREL)
83 string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
84 "${flags_var_to_scrub}" "${${flags_var_to_scrub}}")
85 endforeach()
Oscar Fuentesf4202ba2011-02-03 20:57:36 +000086 endif()
Oscar Fuentesf4202ba2011-02-03 20:57:36 +000087endif()
88
Sanjoy Das8ce64992015-03-26 19:25:01 +000089string(TOUPPER "${LLVM_ABI_BREAKING_CHECKS}" uppercase_LLVM_ABI_BREAKING_CHECKS)
90
91if( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "WITH_ASSERTS" )
92 if( LLVM_ENABLE_ASSERTIONS )
93 set( LLVM_ENABLE_ABI_BREAKING_CHECKS 1 )
94 endif()
95elseif( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "FORCE_ON" )
96 set( LLVM_ENABLE_ABI_BREAKING_CHECKS 1 )
97elseif( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "FORCE_OFF" )
98 # We don't need to do anything special to turn off ABI breaking checks.
Eric Fiselier8e2f0a82015-05-12 22:49:18 +000099elseif( NOT DEFINED LLVM_ABI_BREAKING_CHECKS )
100 # Treat LLVM_ABI_BREAKING_CHECKS like "FORCE_OFF" when it has not been
101 # defined.
Sanjoy Das8ce64992015-03-26 19:25:01 +0000102else()
103 message(FATAL_ERROR "Unknown value for LLVM_ABI_BREAKING_CHECKS: \"${LLVM_ABI_BREAKING_CHECKS}\"!")
104endif()
105
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000106if(WIN32)
Nico Weberc27118d2013-12-28 23:31:44 +0000107 set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000108 if(CYGWIN)
109 set(LLVM_ON_WIN32 0)
110 set(LLVM_ON_UNIX 1)
111 else(CYGWIN)
112 set(LLVM_ON_WIN32 1)
113 set(LLVM_ON_UNIX 0)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000114 endif(CYGWIN)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000115else(WIN32)
116 if(UNIX)
117 set(LLVM_ON_WIN32 0)
118 set(LLVM_ON_UNIX 1)
119 if(APPLE)
Nico Weberc27118d2013-12-28 23:31:44 +0000120 set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000121 else(APPLE)
Nico Weberc27118d2013-12-28 23:31:44 +0000122 set(LLVM_HAVE_LINK_VERSION_SCRIPT 1)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000123 endif(APPLE)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000124 else(UNIX)
125 MESSAGE(SEND_ERROR "Unable to determine platform")
126 endif(UNIX)
127endif(WIN32)
128
Alp Tokerc0b7bb52014-01-08 11:10:24 +0000129set(EXEEXT ${CMAKE_EXECUTABLE_SUFFIX})
130set(LTDL_SHLIB_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
NAKAMURA Takumi92d65802014-02-13 11:19:00 +0000131
132# We use *.dylib rather than *.so on darwin.
133set(LLVM_PLUGIN_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
Alp Tokerc0b7bb52014-01-08 11:10:24 +0000134
NAKAMURA Takumi58f6e742014-02-13 11:19:11 +0000135if(APPLE)
136 # Darwin-specific linker flags for loadable modules.
137 set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-flat_namespace -Wl,-undefined -Wl,suppress")
138endif()
139
Rafael Espindolabb5d09f2015-01-22 14:06:51 +0000140# Pass -Wl,-z,defs. This makes sure all symbols are defined. Otherwise a DSO
141# build might work on ELF but fail on MachO/COFF.
Yaron Keren5519ad32015-07-23 08:06:12 +0000142if(NOT (${CMAKE_SYSTEM_NAME} MATCHES "Darwin" OR WIN32 OR CYGWIN OR
Yaron Kerencf24bbb2015-11-21 06:33:54 +0000143 ${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD" OR
144 ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD") AND
Rafael Espindola19b53842015-01-22 20:57:30 +0000145 NOT LLVM_USE_SANITIZER)
Rafael Espindolabb5d09f2015-01-22 14:06:51 +0000146 set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-z,defs")
147endif()
148
149
Duncan Sands71de6dc2013-03-25 13:25:34 +0000150function(append value)
151 foreach(variable ${ARGN})
Alexey Samsonov67065782013-03-13 20:50:23 +0000152 set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
Duncan Sands71de6dc2013-03-25 13:25:34 +0000153 endforeach(variable)
154endfunction()
155
156function(append_if condition value)
157 if (${condition})
158 foreach(variable ${ARGN})
159 set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
160 endforeach(variable)
Alexey Samsonov67065782013-03-13 20:50:23 +0000161 endif()
162endfunction()
163
Alp Toker00683972014-07-09 03:38:19 +0000164macro(add_flag_if_supported flag name)
165 check_c_compiler_flag("-Werror ${flag}" "C_SUPPORTS_${name}")
166 append_if("C_SUPPORTS_${name}" "${flag}" CMAKE_C_FLAGS)
167 check_cxx_compiler_flag("-Werror ${flag}" "CXX_SUPPORTS_${name}")
168 append_if("CXX_SUPPORTS_${name}" "${flag}" CMAKE_CXX_FLAGS)
Alexey Samsonov75789a22013-03-26 07:49:46 +0000169endmacro()
170
Alp Toker00683972014-07-09 03:38:19 +0000171function(add_flag_or_print_warning flag name)
172 check_c_compiler_flag("-Werror ${flag}" "C_SUPPORTS_${name}")
173 check_cxx_compiler_flag("-Werror ${flag}" "CXX_SUPPORTS_${name}")
Richard Smithca9ae102014-09-26 21:35:48 +0000174 if (C_SUPPORTS_${name} AND CXX_SUPPORTS_${name})
Alp Toker00683972014-07-09 03:38:19 +0000175 message(STATUS "Building with ${flag}")
176 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE)
177 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" PARENT_SCOPE)
Douglas Katzman280ee912015-07-28 14:43:53 +0000178 set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} ${flag}" PARENT_SCOPE)
Alp Toker00683972014-07-09 03:38:19 +0000179 else()
180 message(WARNING "${flag} is not supported.")
181 endif()
182endfunction()
183
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000184if( LLVM_ENABLE_PIC )
185 if( XCODE )
186 # Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't
187 # know how to disable this, so just force ENABLE_PIC off for now.
188 message(WARNING "-fPIC not supported with Xcode.")
NAKAMURA Takumi1b745d02011-12-16 06:21:08 +0000189 elseif( WIN32 OR CYGWIN)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000190 # On Windows all code is PIC. MinGW warns if -fPIC is used.
191 else()
Alp Toker00683972014-07-09 03:38:19 +0000192 add_flag_or_print_warning("-fPIC" FPIC)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000193 endif()
194endif()
195
Chris Bieneman6b43f1f2015-11-18 22:49:26 +0000196if(NOT WIN32 AND NOT CYGWIN)
197 # MinGW warns if -fvisibility-inlines-hidden is used.
198 check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG)
199 append_if(SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG "-fvisibility-inlines-hidden" CMAKE_CXX_FLAGS)
200endif()
201
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000202if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
203 # TODO: support other platforms and toolchains.
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000204 if( LLVM_BUILD_32_BITS )
205 message(STATUS "Building 32 bits executables and libraries.")
206 add_llvm_definitions( -m32 )
Tim Northoverf6e29c42012-05-23 18:42:02 +0000207 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -m32")
208 set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m32")
Tobias Grosserb32ad402012-06-08 09:41:23 +0000209 set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -m32")
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000210 endif( LLVM_BUILD_32_BITS )
211endif( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
212
Rafael Espindolaef4edf42014-11-05 14:03:58 +0000213if (LLVM_BUILD_STATIC)
214 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static")
215endif()
216
Ted Kremenek68af8452014-03-13 06:37:28 +0000217if( XCODE )
218 # For Xcode enable several build settings that correspond to
219 # many warnings that are on by default in Clang but are
220 # not enabled for historical reasons. For versions of Xcode
221 # that do not support these options they will simply
222 # be ignored.
223 set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_ABOUT_RETURN_TYPE "YES")
224 set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_ABOUT_MISSING_NEWLINE "YES")
225 set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_VALUE "YES")
226 set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_VARIABLE "YES")
227 set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_SIGN_COMPARE "YES")
228 set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_FUNCTION "YES")
229 set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED "YES")
230 set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_HIDDEN_VIRTUAL_FUNCTIONS "YES")
231 set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNINITIALIZED_AUTOS "YES")
232 set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_BOOL_CONVERSION "YES")
233 set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_EMPTY_BODY "YES")
234 set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_ENUM_CONVERSION "YES")
235 set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_INT_CONVERSION "YES")
236 set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_CONSTANT_CONVERSION "YES")
237 set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_NON_VIRTUAL_DESTRUCTOR "YES")
238endif()
239
NAKAMURA Takumia83601d2012-04-21 14:50:56 +0000240# On Win32 using MS tools, provide an option to set the number of parallel jobs
241# to use.
NAKAMURA Takumi75bfe692012-04-21 14:51:02 +0000242if( MSVC_IDE )
Oscar Fuentes318c3f12011-03-02 17:47:37 +0000243 set(LLVM_COMPILER_JOBS "0" CACHE STRING
244 "Number of parallel compiler jobs. 0 means use all processors. Default is 0.")
245 if( NOT LLVM_COMPILER_JOBS STREQUAL "1" )
246 if( LLVM_COMPILER_JOBS STREQUAL "0" )
247 add_llvm_definitions( /MP )
248 else()
Yaron Kerene4855112014-03-25 09:34:20 +0000249 message(STATUS "Number of parallel compiler jobs set to " ${LLVM_COMPILER_JOBS})
250 add_llvm_definitions( /MP${LLVM_COMPILER_JOBS} )
Oscar Fuentes318c3f12011-03-02 17:47:37 +0000251 endif()
252 else()
253 message(STATUS "Parallel compilation disabled")
254 endif()
255endif()
256
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000257if( MSVC )
Yaron Keren528d8d62015-08-21 17:31:03 +0000258 if( CMAKE_CXX_COMPILER_VERSION VERSION_LESS 19.0 )
259 # For MSVC 2013, disable iterator null pointer checking in debug mode,
260 # especially so std::equal(nullptr, nullptr, nullptr) will not assert.
261 add_llvm_definitions("-D_DEBUG_POINTER_IMPL=")
262 endif()
263
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000264 include(ChooseMSVCCRT)
265
Hans Wennborgbef50ab2013-10-17 18:39:47 +0000266 if( NOT (${CMAKE_VERSION} VERSION_LESS 2.8.11) )
267 # set stack reserved size to ~10MB
268 # CMake previously automatically set this value for MSVC builds, but the
269 # behavior was changed in CMake 2.8.11 (Issue 12437) to use the MSVC default
270 # value (1 MB) which is not enough for us in tasks such as parsing recursive
271 # C++ templates in Clang.
272 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /STACK:10000000")
273 endif()
Hans Wennborgfd541f02013-10-17 17:49:57 +0000274
Yaron Kerene4855112014-03-25 09:34:20 +0000275 if( MSVC11 )
Michael J. Spencer35145f82012-03-01 22:42:52 +0000276 add_llvm_definitions(-D_VARIADIC_MAX=10)
277 endif()
Greg Bedwell580defb2015-03-11 14:57:48 +0000278
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000279 # Add definitions that make MSVC much less annoying.
280 add_llvm_definitions(
281 # For some reason MS wants to deprecate a bunch of standard functions...
282 -D_CRT_SECURE_NO_DEPRECATE
283 -D_CRT_SECURE_NO_WARNINGS
284 -D_CRT_NONSTDC_NO_DEPRECATE
285 -D_CRT_NONSTDC_NO_WARNINGS
286 -D_SCL_SECURE_NO_DEPRECATE
287 -D_SCL_SECURE_NO_WARNINGS
Greg Bedwell8aa30002015-03-19 16:32:47 +0000288 )
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000289
Greg Bedwell8aa30002015-03-19 16:32:47 +0000290 set(msvc_warning_flags
Michael J. Spencer6d45d832012-06-07 21:34:15 +0000291 # Disabled warnings.
Aaron Ballmane11ce622015-09-10 12:53:40 +0000292 -wd4141 # Suppress ''modifier' : used more than once' (because of __forceinline combined with inline)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000293 -wd4146 # Suppress 'unary minus operator applied to unsigned type, result still unsigned'
294 -wd4180 # Suppress 'qualifier applied to function type has no meaning; ignored'
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000295 -wd4244 # Suppress ''argument' : conversion from 'type1' to 'type2', possible loss of data'
Aaron Ballmandabe7802014-08-18 14:54:22 +0000296 -wd4258 # Suppress ''var' : definition from the for loop is ignored; the definition from the enclosing scope is used'
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000297 -wd4267 # Suppress ''var' : conversion from 'size_t' to 'type', possible loss of data'
Yaron Keren24fdbe52014-03-25 08:42:49 +0000298 -wd4291 # Suppress ''declaration' : no matching operator delete found; memory will not be freed if initialization throws an exception'
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000299 -wd4345 # Suppress 'behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized'
300 -wd4351 # Suppress 'new behavior: elements of array 'array' will be default initialized'
301 -wd4355 # Suppress ''this' : used in base member initializer list'
Reid Kleckner19cb1712014-10-31 22:55:57 +0000302 -wd4456 # Suppress 'declaration of 'var' hides local variable'
303 -wd4457 # Suppress 'declaration of 'var' hides function parameter'
304 -wd4458 # Suppress 'declaration of 'var' hides class member'
305 -wd4459 # Suppress 'declaration of 'var' hides global declaration'
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000306 -wd4503 # Suppress ''identifier' : decorated name length exceeded, name was truncated'
307 -wd4624 # Suppress ''derived class' : destructor could not be generated because a base class destructor is inaccessible'
Yaron Keren24fdbe52014-03-25 08:42:49 +0000308 -wd4722 # Suppress 'function' : destructor never returns, potential memory leak
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000309 -wd4800 # Suppress ''type' : forcing value to bool 'true' or 'false' (performance warning)'
Andrew Kaylor5c73e1f2015-03-24 23:37:10 +0000310 -wd4100 # Suppress 'unreferenced formal parameter'
311 -wd4127 # Suppress 'conditional expression is constant'
312 -wd4512 # Suppress 'assignment operator could not be generated'
313 -wd4505 # Suppress 'unreferenced local function has been removed'
314 -wd4610 # Suppress '<class> can never be instantiated'
315 -wd4510 # Suppress 'default constructor could not be generated'
316 -wd4702 # Suppress 'unreachable code'
317 -wd4245 # Suppress 'signed/unsigned mismatch'
318 -wd4706 # Suppress 'assignment within conditional expression'
319 -wd4310 # Suppress 'cast truncates constant value'
320 -wd4701 # Suppress 'potentially uninitialized local variable'
321 -wd4703 # Suppress 'potentially uninitialized local pointer variable'
322 -wd4389 # Suppress 'signed/unsigned mismatch'
323 -wd4611 # Suppress 'interaction between '_setjmp' and C++ object destruction is non-portable'
324 -wd4805 # Suppress 'unsafe mix of type <type> and type <type> in operation'
325 -wd4204 # Suppress 'nonstandard extension used : non-constant aggregate initializer'
Aaron Ballman0cba6422015-07-20 21:14:14 +0000326 -wd4577 # Suppress 'noexcept used with no exception handling mode specified; termination on exception is not guaranteed'
327 -wd4091 # Suppress 'typedef: ignored on left of '' when no variable is declared'
Aaron Ballman5cbf37f2015-12-07 15:44:34 +0000328 # C4592 is disabled because of false positives in Visual Studio 2015
329 # Update 1. Re-evaluate the usefulness of this diagnostic with Update 2.
330 -wd4592 # Suppress ''var': symbol will be dynamically initialized (implementation limitation)
Andrew Kaylor84e55fc2015-04-21 22:29:38 +0000331
Douglas Katzmanb5fb2d42015-06-24 21:46:53 +0000332 # Ideally, we'd like this warning to be enabled, but MSVC 2013 doesn't
Andrew Kaylor84e55fc2015-04-21 22:29:38 +0000333 # support the 'aligned' attribute in the way that clang sources requires (for
Douglas Katzmanb5fb2d42015-06-24 21:46:53 +0000334 # any code that uses the LLVM_ALIGNAS macro), so this is must be disabled to
Andrew Kaylor84e55fc2015-04-21 22:29:38 +0000335 # avoid unwanted alignment warnings.
336 # When we switch to requiring a version of MSVC that supports the 'alignas'
337 # specifier (MSVC 2015?) this warning can be re-enabled.
338 -wd4324 # Suppress 'structure was padded due to __declspec(align())'
339
Michael J. Spencer6d45d832012-06-07 21:34:15 +0000340 # Promoted warnings.
341 -w14062 # Promote 'enumerator in switch of enum is not handled' to level 1 warning.
Michael J. Spenceraeb59e12012-06-07 23:33:56 +0000342
343 # Promoted warnings to errors.
344 -we4238 # Promote 'nonstandard extension used : class rvalue used as lvalue' to error.
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000345 )
346
347 # Enable warnings
348 if (LLVM_ENABLE_WARNINGS)
Nico Weberd23b4002015-12-23 02:38:31 +0000349 # Put /W4 in front of all the -we flags. cl.exe doesn't care, but for
350 # clang-cl having /W4 after the -we flags will re-enable the warnings
351 # disabled by -we.
352 set(msvc_warning_flags "/W4 ${msvc_warning_flags}")
Zachary Turnerad84bc42015-04-14 16:57:54 +0000353 # CMake appends /W3 by default, and having /W3 followed by /W4 will result in
354 # cl : Command line warning D9025 : overriding '/W3' with '/W4'. Since this is
355 # a command line warning and not a compiler warning, it cannot be suppressed except
356 # by fixing the command line.
357 string(REGEX REPLACE " /W[0-4]" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
358 string(REGEX REPLACE " /W[0-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
359
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000360 if (LLVM_ENABLE_PEDANTIC)
361 # No MSVC equivalent available
362 endif (LLVM_ENABLE_PEDANTIC)
363 endif (LLVM_ENABLE_WARNINGS)
364 if (LLVM_ENABLE_WERROR)
Greg Bedwell8aa30002015-03-19 16:32:47 +0000365 append("/WX" msvc_warning_flags)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000366 endif (LLVM_ENABLE_WERROR)
Greg Bedwell8aa30002015-03-19 16:32:47 +0000367
368 foreach(flag ${msvc_warning_flags})
369 append("${flag}" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
370 endforeach(flag)
371
Rafael Espindolaf8465572015-08-12 17:09:25 +0000372 append("/Zc:inline" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
373
Nico Weber891419a2016-01-06 19:05:19 +0000374 if (NOT LLVM_ENABLE_TIMESTAMPS AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")
375 # clang-cl and cl by default produce non-deterministic binaries because
376 # link.exe /incremental requires a timestamp in the .obj file. clang-cl
377 # has the flag /Brepro to force deterministic binaries, so pass that when
378 # LLVM_ENABLE_TIMESTAMPS is turned off.
379 # This checks CMAKE_CXX_COMPILER_ID in addition to check_cxx_compiler_flag()
380 # because cl.exe does not emit an error on flags it doesn't understand,
381 # letting check_cxx_compiler_flag() claim it understands all flags.
382 check_cxx_compiler_flag("/Brepro" SUPPORTS_BREPRO)
383 append_if(SUPPORTS_BREPRO "/Brepro" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
384
385 if (SUPPORTS_BREPRO)
386 # Check if /INCREMENTAL is passed to the linker and complain that it
387 # won't work with /Brepro.
388 string(TOUPPER "${CMAKE_EXE_LINKER_FLAGS}" upper_exe_flags)
389 string(TOUPPER "${CMAKE_MODULE_LINKER_FLAGS}" upper_module_flags)
390 string(TOUPPER "${CMAKE_SHARED_LINKER_FLAGS}" upper_shared_flags)
391
392 string(FIND "${upper_exe_flags}" "/INCREMENTAL" exe_index)
393 string(FIND "${upper_module_flags}" "/INCREMENTAL" module_index)
394 string(FIND "${upper_shared_flags}" "/INCREMENTAL" shared_index)
395
396 if (${exe_index} GREATER -1 OR
397 ${module_index} GREATER -1 OR
398 ${shared_index} GREATER -1)
399 message(FATAL_ERROR "LLVM_ENABLE_TIMESTAMPS not compatible with /INCREMENTAL linking")
400 endif()
401 endif()
402 endif()
403
Reid Kleckner69411ce2015-05-19 23:28:23 +0000404 # Disable sized deallocation if the flag is supported. MSVC fails to compile
405 # the operator new overload in User otherwise.
406 check_c_compiler_flag("/WX /Zc:sizedDealloc-" SUPPORTS_SIZED_DEALLOC)
407 append_if(SUPPORTS_SIZED_DEALLOC "/Zc:sizedDealloc-" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
408
Oscar Fuentesab84a7b2011-05-11 13:53:08 +0000409elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000410 if (LLVM_ENABLE_WARNINGS)
David Blaikie74d88062015-10-01 00:44:21 +0000411 append("-Wall -W -Wno-unused-parameter -Wwrite-strings" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Roman Divacky2d64ef92014-11-13 19:45:27 +0000412 append("-Wcast-qual" CMAKE_CXX_FLAGS)
Edwin Vanec6410842013-01-31 18:05:54 +0000413
414 # Turn off missing field initializer warnings for gcc to avoid noise from
415 # false positives with empty {}. Turn them on otherwise (they're off by
416 # default for clang).
417 check_cxx_compiler_flag("-Wmissing-field-initializers" CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG)
418 if (CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG)
419 if (CMAKE_COMPILER_IS_GNUCXX)
Duncan Sands71de6dc2013-03-25 13:25:34 +0000420 append("-Wno-missing-field-initializers" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Edwin Vanec6410842013-01-31 18:05:54 +0000421 else()
Duncan Sands71de6dc2013-03-25 13:25:34 +0000422 append("-Wmissing-field-initializers" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Edwin Vanec6410842013-01-31 18:05:54 +0000423 endif()
424 endif()
425
Eric Fiselier2243d7b2015-10-13 23:51:58 +0000426 append_if(LLVM_ENABLE_PEDANTIC "-pedantic" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
427 append_if(LLVM_ENABLE_PEDANTIC "-Wno-long-long" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Alp Toker00683972014-07-09 03:38:19 +0000428 add_flag_if_supported("-Wcovered-switch-default" COVERED_SWITCH_DEFAULT_FLAG)
Duncan Sands71de6dc2013-03-25 13:25:34 +0000429 append_if(USE_NO_UNINITIALIZED "-Wno-uninitialized" CMAKE_CXX_FLAGS)
430 append_if(USE_NO_MAYBE_UNINITIALIZED "-Wno-maybe-uninitialized" CMAKE_CXX_FLAGS)
Dylan Noblesmith367cef62014-08-23 21:10:56 +0000431
432 # Check if -Wnon-virtual-dtor warns even though the class is marked final.
433 # If it does, don't add it. So it won't be added on clang 3.4 and older.
434 # This also catches cases when -Wnon-virtual-dtor isn't supported by
Andy Gibbs33a0eb72015-12-17 16:43:53 +0000435 # the compiler at all. This flag is not activated for gcc since it will
436 # incorrectly identify a protected non-virtual base when there is a friend
437 # declaration.
438 if (NOT CMAKE_COMPILER_IS_GNUCXX)
439 set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
440 set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -std=c++11 -Werror=non-virtual-dtor")
441 CHECK_CXX_SOURCE_COMPILES("class base {public: virtual void anchor();protected: ~base();};
442 class derived final : public base { public: ~derived();};
443 int main() { return 0; }"
444 CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR)
445 set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
446 append_if(CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR
447 "-Wnon-virtual-dtor" CMAKE_CXX_FLAGS)
448 endif()
449
450 # Enable -Wdelete-non-virtual-dtor if available.
451 add_flag_if_supported("-Wdelete-non-virtual-dtor" DELETE_NON_VIRTUAL_DTOR_FLAG)
Evgeniy Stepanov1b5fd3e2014-05-06 09:46:06 +0000452
453 # Check if -Wcomment is OK with an // comment ending with '\' if the next
454 # line is also a // comment.
455 set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
Dylan Noblesmith63f9b572014-08-23 21:10:58 +0000456 set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror -Wcomment")
Evgeniy Stepanov1b5fd3e2014-05-06 09:46:06 +0000457 CHECK_C_SOURCE_COMPILES("// \\\\\\n//\\nint main() {return 0;}"
458 C_WCOMMENT_ALLOWS_LINE_WRAP)
459 set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
460 if (NOT C_WCOMMENT_ALLOWS_LINE_WRAP)
461 append("-Wno-comment" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
462 endif()
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000463 endif (LLVM_ENABLE_WARNINGS)
Alexey Samsonovcd083fe2014-03-13 13:08:47 +0000464 append_if(LLVM_ENABLE_WERROR "-Werror" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Alp Toker7099cd72014-07-09 03:39:32 +0000465 if (NOT LLVM_ENABLE_TIMESTAMPS)
466 add_flag_if_supported("-Werror=date-time" WERROR_DATE_TIME)
467 endif ()
Chandler Carruth25eacf72014-03-01 03:16:07 +0000468 if (LLVM_ENABLE_CXX1Y)
469 check_cxx_compiler_flag("-std=c++1y" CXX_SUPPORTS_CXX1Y)
470 append_if(CXX_SUPPORTS_CXX1Y "-std=c++1y" CMAKE_CXX_FLAGS)
471 else()
Arnaud A. de Grandmaisonb697b532013-11-26 10:33:53 +0000472 check_cxx_compiler_flag("-std=c++11" CXX_SUPPORTS_CXX11)
Chandler Carruth25eacf72014-03-01 03:16:07 +0000473 if (CXX_SUPPORTS_CXX11)
Rafael Espindola8b350742014-03-12 20:01:15 +0000474 if (CYGWIN OR MINGW)
475 # MinGW and Cygwin are a bit stricter and lack things like
476 # 'strdup', 'stricmp', etc in c++11 mode.
477 append("-std=gnu++11" CMAKE_CXX_FLAGS)
478 else()
479 append("-std=c++11" CMAKE_CXX_FLAGS)
480 endif()
Chandler Carruth25eacf72014-03-01 03:16:07 +0000481 else()
482 message(FATAL_ERROR "LLVM requires C++11 support but the '-std=c++11' flag isn't supported.")
483 endif()
484 endif()
Richard Smith2b91a7f2014-09-26 22:40:15 +0000485 if (LLVM_ENABLE_MODULES)
486 set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
NAKAMURA Takumi0f95ac4b2015-11-13 01:26:31 +0000487 set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fmodules")
Richard Smith2b91a7f2014-09-26 22:40:15 +0000488 # Check that we can build code with modules enabled, and that repeatedly
489 # including <cassert> still manages to respect NDEBUG properly.
490 CHECK_CXX_SOURCE_COMPILES("#undef NDEBUG
491 #include <cassert>
492 #define NDEBUG
493 #include <cassert>
494 int main() { assert(this code is not compiled); }"
495 CXX_SUPPORTS_MODULES)
496 set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
497 if (CXX_SUPPORTS_MODULES)
498 append_if(CXX_SUPPORTS_MODULES "-fmodules" CMAKE_C_FLAGS)
499 append_if(CXX_SUPPORTS_MODULES "-fmodules -fcxx-modules" CMAKE_CXX_FLAGS)
500 else()
501 message(FATAL_ERROR "LLVM_ENABLE_MODULES is not supported by this compiler")
502 endif()
503 endif(LLVM_ENABLE_MODULES)
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000504endif( MSVC )
505
Alexey Samsonov75789a22013-03-26 07:49:46 +0000506macro(append_common_sanitizer_flags)
Reid Klecknerd7a568f2015-08-14 16:48:34 +0000507 if (NOT MSVC)
508 # Append -fno-omit-frame-pointer and turn on debug info to get better
509 # stack traces.
510 add_flag_if_supported("-fno-omit-frame-pointer" FNO_OMIT_FRAME_POINTER)
511 if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
Reid Kleckner38b89382015-08-25 16:06:40 +0000512 NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
Reid Klecknerd7a568f2015-08-14 16:48:34 +0000513 add_flag_if_supported("-gline-tables-only" GLINE_TABLES_ONLY)
514 endif()
515 # Use -O1 even in debug mode, otherwise sanitizers slowdown is too large.
516 if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
517 add_flag_if_supported("-O1" O1)
518 endif()
519 elseif (CLANG_CL)
520 # Keep frame pointers around.
521 append("/Oy-" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
522 if (CMAKE_LINKER MATCHES "lld-link.exe")
523 # Use DWARF debug info with LLD.
524 append("-gdwarf" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
525 else()
526 # Enable codeview otherwise.
527 append("/Z7" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
528 endif()
529 # Always ask the linker to produce symbols with asan.
530 append("-debug" CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS)
Alexey Samsonovf9ab3512013-09-02 09:15:01 +0000531 endif()
Alexey Samsonov75789a22013-03-26 07:49:46 +0000532endmacro()
533
534# Turn on sanitizers if necessary.
535if(LLVM_USE_SANITIZER)
536 if (LLVM_ON_UNIX)
537 if (LLVM_USE_SANITIZER STREQUAL "Address")
538 append_common_sanitizer_flags()
Alp Toker696b4a02014-07-09 06:27:05 +0000539 append("-fsanitize=address" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Alexey Samsonov75789a22013-03-26 07:49:46 +0000540 elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
541 append_common_sanitizer_flags()
Alp Toker696b4a02014-07-09 06:27:05 +0000542 append("-fsanitize=memory" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Alexey Samsonov75789a22013-03-26 07:49:46 +0000543 if(LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
Alp Toker696b4a02014-07-09 06:27:05 +0000544 append("-fsanitize-memory-track-origins" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Alexey Samsonov75789a22013-03-26 07:49:46 +0000545 endif()
Alexey Samsonov4ee26752014-08-29 00:50:36 +0000546 elseif (LLVM_USE_SANITIZER STREQUAL "Undefined")
547 append_common_sanitizer_flags()
Justin Bogner8c8fb162015-05-14 04:52:57 +0000548 append("-fsanitize=undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all"
Alexey Samsonov4ee26752014-08-29 00:50:36 +0000549 CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Eric Fiselierbe6705d2014-11-18 21:23:38 +0000550 elseif (LLVM_USE_SANITIZER STREQUAL "Thread")
551 append_common_sanitizer_flags()
552 append("-fsanitize=thread" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Filipe Cabecinhasb36685e2015-02-04 22:33:31 +0000553 elseif (LLVM_USE_SANITIZER STREQUAL "Address;Undefined" OR
554 LLVM_USE_SANITIZER STREQUAL "Undefined;Address")
555 append_common_sanitizer_flags()
Justin Bogner8c8fb162015-05-14 04:52:57 +0000556 append("-fsanitize=address,undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all"
Filipe Cabecinhasb36685e2015-02-04 22:33:31 +0000557 CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Alexey Samsonov75789a22013-03-26 07:49:46 +0000558 else()
Justin Bogner1ded6982015-09-01 05:45:07 +0000559 message(FATAL_ERROR "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")
Alexey Samsonov75789a22013-03-26 07:49:46 +0000560 endif()
Reid Klecknerd7a568f2015-08-14 16:48:34 +0000561 elseif(MSVC)
562 if (LLVM_USE_SANITIZER STREQUAL "Address")
563 append_common_sanitizer_flags()
564 append("-fsanitize=address" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
565 else()
Justin Bogner1ded6982015-09-01 05:45:07 +0000566 message(FATAL_ERROR "This sanitizer not yet supported in the MSVC environment: ${LLVM_USE_SANITIZER}")
Reid Klecknerd7a568f2015-08-14 16:48:34 +0000567 endif()
Alexey Samsonov75789a22013-03-26 07:49:46 +0000568 else()
Justin Bogner1ded6982015-09-01 05:45:07 +0000569 message(FATAL_ERROR "LLVM_USE_SANITIZER is not supported on this platform.")
Alexey Samsonov75789a22013-03-26 07:49:46 +0000570 endif()
Kostya Serebryany869b8672015-01-27 17:59:28 +0000571 if (LLVM_USE_SANITIZE_COVERAGE)
Kostya Serebryany1ac80552015-05-08 21:30:55 +0000572 append("-fsanitize-coverage=edge,indirect-calls,8bit-counters,trace-cmp" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Kostya Serebryany869b8672015-01-27 17:59:28 +0000573 endif()
Alexey Samsonov75789a22013-03-26 07:49:46 +0000574endif()
575
Eric Christopher39878062013-07-30 21:44:10 +0000576# Turn on -gsplit-dwarf if requested
577if(LLVM_USE_SPLIT_DWARF)
Peter Collingbournea7d17512014-10-22 19:49:19 +0000578 add_definitions("-gsplit-dwarf")
Eric Christopher39878062013-07-30 21:44:10 +0000579endif()
580
Oscar Fuentesf4202ba2011-02-03 20:57:36 +0000581add_llvm_definitions( -D__STDC_CONSTANT_MACROS )
NAKAMURA Takumic5554c92011-10-11 12:51:44 +0000582add_llvm_definitions( -D__STDC_FORMAT_MACROS )
NAKAMURA Takumie63cd192011-10-11 12:51:36 +0000583add_llvm_definitions( -D__STDC_LIMIT_MACROS )
Arnaud A. de Grandmaison916f3cc2013-05-29 20:41:35 +0000584
585# clang doesn't print colored diagnostics when invoked from Ninja
Rafael Espindola6f2564c2013-06-14 19:41:05 +0000586if (UNIX AND
587 CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND
588 CMAKE_GENERATOR STREQUAL "Ninja")
589 append("-fcolor-diagnostics" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
Arnaud A. de Grandmaison916f3cc2013-05-29 20:41:35 +0000590endif()
NAKAMURA Takumibb50bce2014-01-28 09:43:55 +0000591
592# Add flags for add_dead_strip().
593# FIXME: With MSVS, consider compiling with /Gy and linking with /OPT:REF?
594# But MinSizeRel seems to add that automatically, so maybe disable these
595# flags instead if LLVM_NO_DEAD_STRIP is set.
596if(NOT CYGWIN AND NOT WIN32)
Rafael Espindola9c5701f2015-04-06 14:34:43 +0000597 if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND
598 NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
Alexey Samsonov482beff2014-02-04 08:15:46 +0000599 check_c_compiler_flag("-Werror -fno-function-sections" C_SUPPORTS_FNO_FUNCTION_SECTIONS)
600 if (C_SUPPORTS_FNO_FUNCTION_SECTIONS)
601 # Don't add -ffunction-section if it can be disabled with -fno-function-sections.
602 # Doing so will break sanitizers.
Alp Toker00683972014-07-09 03:38:19 +0000603 add_flag_if_supported("-ffunction-sections" FFUNCTION_SECTIONS)
Evgeniy Stepanovc7b7e252014-02-03 13:57:09 +0000604 endif()
Alp Toker00683972014-07-09 03:38:19 +0000605 add_flag_if_supported("-fdata-sections" FDATA_SECTIONS)
NAKAMURA Takumibb50bce2014-01-28 09:43:55 +0000606 endif()
607endif()
NAKAMURA Takumia679f432014-01-28 09:44:06 +0000608
NAKAMURA Takumif8161232014-03-16 13:51:24 +0000609if(CYGWIN OR MINGW)
610 # Prune --out-implib from executables. It doesn't make sense even
611 # with --export-all-symbols.
612 string(REGEX REPLACE "-Wl,--out-implib,[^ ]+ " " "
613 CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_LINK_EXECUTABLE}")
614 string(REGEX REPLACE "-Wl,--out-implib,[^ ]+ " " "
615 CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE}")
616endif()
617
NAKAMURA Takumia679f432014-01-28 09:44:06 +0000618if(MSVC)
619 # Remove flags here, for exceptions and RTTI.
NAKAMURA Takumiac624642014-01-31 17:32:36 +0000620 # Each target property or source property should be responsible to control
621 # them.
NAKAMURA Takumia679f432014-01-28 09:44:06 +0000622 # CL.EXE complains to override flags like "/GR /GR-".
623 string(REGEX REPLACE "(^| ) */EH[-cs]+ *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
624 string(REGEX REPLACE "(^| ) */GR-? *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
625endif()
NAKAMURA Takumi8d7a1732014-07-04 04:45:40 +0000626
Dan Liewa5bdc842014-07-22 15:41:18 +0000627# Provide public options to globally control RTTI and EH
628option(LLVM_ENABLE_EH "Enable Exception handling" OFF)
629option(LLVM_ENABLE_RTTI "Enable run time type information" OFF)
630if(LLVM_ENABLE_EH AND NOT LLVM_ENABLE_RTTI)
631 message(FATAL_ERROR "Exception handling requires RTTI. You must set LLVM_ENABLE_RTTI to ON")
632endif()
633
Chris Bienemandbdec572015-12-10 21:19:07 +0000634option(LLVM_BUILD_INSTRUMENTED "Build LLVM and tools with PGO instrumentation (experimental)" Off)
635mark_as_advanced(LLVM_BUILD_INSTRUMENTED)
636append_if(LLVM_BUILD_INSTRUMENTED "-fprofile-instr-generate"
637 CMAKE_CXX_FLAGS
638 CMAKE_C_FLAGS
639 CMAKE_EXE_LINKER_FLAGS
640 CMAKE_SHARED_LINKER_FLAGS)
641
NAKAMURA Takumi8d7a1732014-07-04 04:45:40 +0000642# Plugin support
643# FIXME: Make this configurable.
644if(WIN32 OR CYGWIN)
NAKAMURA Takumib5bb1e22014-07-13 13:47:37 +0000645 if(BUILD_SHARED_LIBS)
646 set(LLVM_ENABLE_PLUGINS ON)
647 else()
648 set(LLVM_ENABLE_PLUGINS OFF)
649 endif()
NAKAMURA Takumi8d7a1732014-07-04 04:45:40 +0000650else()
651 set(LLVM_ENABLE_PLUGINS ON)
652endif()