# options and executing the appropriate CMake commands to realize the users'
# selections.
+include(HandleLLVMStdlib)
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)
+if(NOT LLVM_FORCE_USE_OLD_TOOLCHAIN)
+ if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+ if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
+ message(FATAL_ERROR "Host GCC version must be at least 4.7!")
+ endif()
+ elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+ if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.1)
+ message(FATAL_ERROR "Host Clang version must be at least 3.1!")
+ endif()
+
+ # Also test that we aren't using too old of a version of libstdc++ with the
+ # Clang compiler. This is tricky as there is no real way to check the
+ # version of libstdc++ directly. Instead we test for a known bug in
+ # libstdc++4.6 that is fixed in libstdc++4.7.
+ if(NOT LLVM_ENABLE_LIBCXX)
+ set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
+ set(OLD_CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
+ set(CMAKE_REQUIRED_FLAGS "-std=c++0x")
+ check_cxx_source_compiles("
+#include <atomic>
+std::atomic<float> x(0.0f);
+int main() { return (float)x; }"
+ LLVM_NO_OLD_LIBSTDCXX)
+ if(NOT LLVM_NO_OLD_LIBSTDCXX)
+ message(FATAL_ERROR "Host Clang must be able to find libstdc++4.7 or newer!")
+ endif()
+ set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
+ set(CMAKE_REQUIRED_LIBRARIES ${OLD_CMAKE_REQUIRED_LIBRARIES})
+ endif()
+ elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+ if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 17.0)
+ message(FATAL_ERROR "Host Visual Studio must be at least 2012 (MSVC 17.0)")
+ endif()
+ endif()
endif()
if( LLVM_ENABLE_ASSERTIONS )
if( NOT MSVC )
add_definitions( -D_DEBUG )
endif()
- # On Release builds cmake automatically defines NDEBUG, so we
+ # On non-Debug builds cmake automatically defines NDEBUG, so we
# explicitly undefine it:
- if( uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
+ if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
add_definitions( -UNDEBUG )
# Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
- string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
- CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
- endif()
-else()
- if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
- if( NOT MSVC_IDE AND NOT XCODE )
- add_definitions( -DNDEBUG )
- endif()
+ foreach (flags_var_to_scrub
+ CMAKE_CXX_FLAGS_RELEASE
+ CMAKE_CXX_FLAGS_RELWITHDEBINFO
+ CMAKE_CXX_FLAGS_MINSIZEREL
+ CMAKE_C_FLAGS_RELEASE
+ CMAKE_C_FLAGS_RELWITHDEBINFO
+ CMAKE_C_FLAGS_MINSIZEREL)
+ string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
+ "${flags_var_to_scrub}" "${${flags_var_to_scrub}}")
+ endforeach()
endif()
endif()
if(WIN32)
+ set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
if(CYGWIN)
set(LLVM_ON_WIN32 0)
set(LLVM_ON_UNIX 1)
set(LLVM_ON_WIN32 1)
set(LLVM_ON_UNIX 0)
endif(CYGWIN)
- set(LTDL_SHLIB_EXT ".dll")
- set(EXEEXT ".exe")
# Maximum path length is 160 for non-unicode paths
set(MAXPATHLEN 160)
else(WIN32)
set(LLVM_ON_WIN32 0)
set(LLVM_ON_UNIX 1)
if(APPLE)
- set(LTDL_SHLIB_EXT ".dylib")
+ set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
else(APPLE)
- set(LTDL_SHLIB_EXT ".so")
+ set(LLVM_HAVE_LINK_VERSION_SCRIPT 1)
endif(APPLE)
- set(EXEEXT "")
# FIXME: Maximum path length is currently set to 'safe' fixed value
set(MAXPATHLEN 2024)
else(UNIX)
endif(UNIX)
endif(WIN32)
-function(add_flag_or_print_warning flag)
- check_c_compiler_flag(${flag} C_SUPPORTS_FLAG)
- check_cxx_compiler_flag(${flag} CXX_SUPPORTS_FLAG)
- if (C_SUPPORTS_FLAG AND CXX_SUPPORTS_FLAG)
- message(STATUS "Building with ${flag}")
- set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE)
- set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" PARENT_SCOPE)
- else()
- message(WARNING "${flag} is not supported.")
- endif()
-endfunction()
+set(EXEEXT ${CMAKE_EXECUTABLE_SUFFIX})
+set(LTDL_SHLIB_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
+
+# We use *.dylib rather than *.so on darwin.
+set(LLVM_PLUGIN_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
+
+if(APPLE)
+ # Darwin-specific linker flags for loadable modules.
+ set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-flat_namespace -Wl,-undefined -Wl,suppress")
+endif()
function(append value)
foreach(variable ${ARGN})
endif()
endfunction()
-macro(add_flag_if_supported flag)
- check_c_compiler_flag(${flag} C_SUPPORTS_FLAG)
- append_if(C_SUPPORTS_FLAG "${flag}" CMAKE_C_FLAGS)
- check_cxx_compiler_flag(${flag} CXX_SUPPORTS_FLAG)
- append_if(CXX_SUPPORTS_FLAG "${flag}" CMAKE_CXX_FLAGS)
+macro(add_flag_if_supported flag name)
+ check_c_compiler_flag("-Werror ${flag}" "C_SUPPORTS_${name}")
+ append_if("C_SUPPORTS_${name}" "${flag}" CMAKE_C_FLAGS)
+ check_cxx_compiler_flag("-Werror ${flag}" "CXX_SUPPORTS_${name}")
+ append_if("CXX_SUPPORTS_${name}" "${flag}" CMAKE_CXX_FLAGS)
endmacro()
+function(add_flag_or_print_warning flag name)
+ check_c_compiler_flag("-Werror ${flag}" "C_SUPPORTS_${name}")
+ check_cxx_compiler_flag("-Werror ${flag}" "CXX_SUPPORTS_${name}")
+ if (C_SUPPORTS_${name} AND CXX_SUPPORTS_${name})
+ message(STATUS "Building with ${flag}")
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE)
+ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" PARENT_SCOPE)
+ else()
+ message(WARNING "${flag} is not supported.")
+ endif()
+endfunction()
+
if( LLVM_ENABLE_PIC )
if( XCODE )
# Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't
elseif( WIN32 OR CYGWIN)
# On Windows all code is PIC. MinGW warns if -fPIC is used.
else()
- add_flag_or_print_warning("-fPIC")
+ add_flag_or_print_warning("-fPIC" FPIC)
if( WIN32 OR CYGWIN)
# MinGW warns if -fvisibility-inlines-hidden is used.
endif( LLVM_BUILD_32_BITS )
endif( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
+if( XCODE )
+ # For Xcode enable several build settings that correspond to
+ # many warnings that are on by default in Clang but are
+ # not enabled for historical reasons. For versions of Xcode
+ # that do not support these options they will simply
+ # be ignored.
+ set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_ABOUT_RETURN_TYPE "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_ABOUT_MISSING_NEWLINE "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_VALUE "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_VARIABLE "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_SIGN_COMPARE "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNUSED_FUNCTION "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_HIDDEN_VIRTUAL_FUNCTIONS "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_UNINITIALIZED_AUTOS "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_BOOL_CONVERSION "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_EMPTY_BODY "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_ENUM_CONVERSION "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_INT_CONVERSION "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_CLANG_WARN_CONSTANT_CONVERSION "YES")
+ set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_NON_VIRTUAL_DESTRUCTOR "YES")
+endif()
+
# On Win32 using MS tools, provide an option to set the number of parallel jobs
# to use.
if( MSVC_IDE )
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()
+ message(STATUS "Number of parallel compiler jobs set to " ${LLVM_COMPILER_JOBS})
+ add_llvm_definitions( /MP${LLVM_COMPILER_JOBS} )
endif()
else()
message(STATUS "Parallel compilation disabled")
if( MSVC )
include(ChooseMSVCCRT)
+ if( NOT (${CMAKE_VERSION} VERSION_LESS 2.8.11) )
+ # set stack reserved size to ~10MB
+ # CMake previously automatically set this value for MSVC builds, but the
+ # behavior was changed in CMake 2.8.11 (Issue 12437) to use the MSVC default
+ # value (1 MB) which is not enough for us in tasks such as parsing recursive
+ # C++ templates in Clang.
+ set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /STACK:10000000")
+ endif()
+
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_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'
+ -wd4258 # Suppress ''var' : definition from the for loop is ignored; the definition from the enclosing scope is used'
-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'
+ -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.
endif()
append_if(LLVM_ENABLE_PEDANTIC "-pedantic -Wno-long-long" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
- check_cxx_compiler_flag("-Werror -Wcovered-switch-default" CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG)
- append_if(CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG "-Wcovered-switch-default" CMAKE_CXX_FLAGS)
- check_c_compiler_flag("-Werror -Wcovered-switch-default" C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG)
- append_if(C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG "-Wcovered-switch-default" CMAKE_C_FLAGS)
+ add_flag_if_supported("-Wcovered-switch-default" COVERED_SWITCH_DEFAULT_FLAG)
append_if(USE_NO_UNINITIALIZED "-Wno-uninitialized" CMAKE_CXX_FLAGS)
append_if(USE_NO_MAYBE_UNINITIALIZED "-Wno-maybe-uninitialized" CMAKE_CXX_FLAGS)
- check_cxx_compiler_flag("-Werror -Wnon-virtual-dtor" CXX_SUPPORTS_NON_VIRTUAL_DTOR_FLAG)
- append_if(CXX_SUPPORTS_NON_VIRTUAL_DTOR_FLAG "-Wnon-virtual-dtor" CMAKE_CXX_FLAGS)
+
+ # Check if -Wnon-virtual-dtor warns even though the class is marked final.
+ # If it does, don't add it. So it won't be added on clang 3.4 and older.
+ # This also catches cases when -Wnon-virtual-dtor isn't supported by
+ # the compiler at all.
+ set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
+ set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -std=c++11 -Werror=non-virtual-dtor")
+ CHECK_CXX_SOURCE_COMPILES("class base {public: virtual void anchor();protected: ~base();};
+ class derived final : public base { public: ~derived();};
+ int main() { return 0; }"
+ CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR)
+ set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
+ append_if(CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR
+ "-Wnon-virtual-dtor" CMAKE_CXX_FLAGS)
+
+ # Check if -Wcomment is OK with an // comment ending with '\' if the next
+ # line is also a // comment.
+ set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
+ set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror -Wcomment")
+ CHECK_C_SOURCE_COMPILES("// \\\\\\n//\\nint main() {return 0;}"
+ C_WCOMMENT_ALLOWS_LINE_WRAP)
+ set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
+ if (NOT C_WCOMMENT_ALLOWS_LINE_WRAP)
+ append("-Wno-comment" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+ endif()
endif (LLVM_ENABLE_WARNINGS)
- if (LLVM_ENABLE_WERROR)
- add_llvm_definitions( -Werror )
- endif (LLVM_ENABLE_WERROR)
+ append_if(LLVM_ENABLE_WERROR "-Werror" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+ if (NOT LLVM_ENABLE_TIMESTAMPS)
+ add_flag_if_supported("-Werror=date-time" WERROR_DATE_TIME)
+ endif ()
+ if (LLVM_ENABLE_CXX1Y)
+ check_cxx_compiler_flag("-std=c++1y" CXX_SUPPORTS_CXX1Y)
+ append_if(CXX_SUPPORTS_CXX1Y "-std=c++1y" CMAKE_CXX_FLAGS)
+ else()
+ check_cxx_compiler_flag("-std=c++11" CXX_SUPPORTS_CXX11)
+ if (CXX_SUPPORTS_CXX11)
+ if (CYGWIN OR MINGW)
+ # MinGW and Cygwin are a bit stricter and lack things like
+ # 'strdup', 'stricmp', etc in c++11 mode.
+ append("-std=gnu++11" CMAKE_CXX_FLAGS)
+ else()
+ append("-std=c++11" CMAKE_CXX_FLAGS)
+ endif()
+ else()
+ message(FATAL_ERROR "LLVM requires C++11 support but the '-std=c++11' flag isn't supported.")
+ endif()
+ endif()
+ if (LLVM_ENABLE_MODULES)
+ set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
+ set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fmodules -fcxx-modules")
+ # Check that we can build code with modules enabled, and that repeatedly
+ # including <cassert> still manages to respect NDEBUG properly.
+ CHECK_CXX_SOURCE_COMPILES("#undef NDEBUG
+ #include <cassert>
+ #define NDEBUG
+ #include <cassert>
+ int main() { assert(this code is not compiled); }"
+ CXX_SUPPORTS_MODULES)
+ set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
+ if (CXX_SUPPORTS_MODULES)
+ append_if(CXX_SUPPORTS_MODULES "-fmodules" CMAKE_C_FLAGS)
+ append_if(CXX_SUPPORTS_MODULES "-fmodules -fcxx-modules" CMAKE_CXX_FLAGS)
+ else()
+ message(FATAL_ERROR "LLVM_ENABLE_MODULES is not supported by this compiler")
+ endif()
+ endif(LLVM_ENABLE_MODULES)
endif( MSVC )
macro(append_common_sanitizer_flags)
# Append -fno-omit-frame-pointer and turn on debug info to get better
# stack traces.
- add_flag_if_supported("-fno-omit-frame-pointer")
+ add_flag_if_supported("-fno-omit-frame-pointer" FNO_OMIT_FRAME_POINTER)
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
- add_flag_if_supported("-gline-tables-only")
+ add_flag_if_supported("-gline-tables-only" GLINE_TABLES_ONLY)
+ endif()
+ # Use -O1 even in debug mode, otherwise sanitizers slowdown is too large.
+ if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
+ add_flag_if_supported("-O1" O1)
endif()
endmacro()
if (LLVM_ON_UNIX)
if (LLVM_USE_SANITIZER STREQUAL "Address")
append_common_sanitizer_flags()
- add_flag_or_print_warning("-fsanitize=address")
+ append("-fsanitize=address" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
append_common_sanitizer_flags()
- add_flag_or_print_warning("-fsanitize=memory")
- # -pie is required for MSan.
- set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pie")
+ append("-fsanitize=memory" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
if(LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
- add_flag_or_print_warning("-fsanitize-memory-track-origins")
+ append("-fsanitize-memory-track-origins" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
endif()
+ elseif (LLVM_USE_SANITIZER STREQUAL "Undefined")
+ append_common_sanitizer_flags()
+ append("-fsanitize=undefined -fno-sanitize=vptr,function -fno-sanitize-recover"
+ CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
else()
message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")
endif()
endif()
endif()
+# Turn on -gsplit-dwarf if requested
+if(LLVM_USE_SPLIT_DWARF)
+ add_definitions("-gsplit-dwarf")
+endif()
+
add_llvm_definitions( -D__STDC_CONSTANT_MACROS )
add_llvm_definitions( -D__STDC_FORMAT_MACROS )
add_llvm_definitions( -D__STDC_LIMIT_MACROS )
+
+# clang doesn't print colored diagnostics when invoked from Ninja
+if (UNIX AND
+ CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND
+ CMAKE_GENERATOR STREQUAL "Ninja")
+ append("-fcolor-diagnostics" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+endif()
+
+# Add flags for add_dead_strip().
+# FIXME: With MSVS, consider compiling with /Gy and linking with /OPT:REF?
+# But MinSizeRel seems to add that automatically, so maybe disable these
+# flags instead if LLVM_NO_DEAD_STRIP is set.
+if(NOT CYGWIN AND NOT WIN32)
+ if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+ check_c_compiler_flag("-Werror -fno-function-sections" C_SUPPORTS_FNO_FUNCTION_SECTIONS)
+ if (C_SUPPORTS_FNO_FUNCTION_SECTIONS)
+ # Don't add -ffunction-section if it can be disabled with -fno-function-sections.
+ # Doing so will break sanitizers.
+ add_flag_if_supported("-ffunction-sections" FFUNCTION_SECTIONS)
+ endif()
+ add_flag_if_supported("-fdata-sections" FDATA_SECTIONS)
+ endif()
+endif()
+
+if(CYGWIN OR MINGW)
+ # Prune --out-implib from executables. It doesn't make sense even
+ # with --export-all-symbols.
+ string(REGEX REPLACE "-Wl,--out-implib,[^ ]+ " " "
+ CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_LINK_EXECUTABLE}")
+ string(REGEX REPLACE "-Wl,--out-implib,[^ ]+ " " "
+ CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE}")
+endif()
+
+if(MSVC)
+ # Remove flags here, for exceptions and RTTI.
+ # Each target property or source property should be responsible to control
+ # them.
+ # CL.EXE complains to override flags like "/GR /GR-".
+ string(REGEX REPLACE "(^| ) */EH[-cs]+ *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+ string(REGEX REPLACE "(^| ) */GR-? *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+endif()
+
+# Provide public options to globally control RTTI and EH
+option(LLVM_ENABLE_EH "Enable Exception handling" OFF)
+option(LLVM_ENABLE_RTTI "Enable run time type information" OFF)
+if(LLVM_ENABLE_EH AND NOT LLVM_ENABLE_RTTI)
+ message(FATAL_ERROR "Exception handling requires RTTI. You must set LLVM_ENABLE_RTTI to ON")
+endif()
+
+# Plugin support
+# FIXME: Make this configurable.
+if(WIN32 OR CYGWIN)
+ if(BUILD_SHARED_LIBS)
+ set(LLVM_ENABLE_PLUGINS ON)
+ else()
+ set(LLVM_ENABLE_PLUGINS OFF)
+ endif()
+else()
+ set(LLVM_ENABLE_PLUGINS ON)
+endif()
projects / oota-llvm.git / blobdiff