+# This CMake module is responsible for interpreting the user defined LLVM_
+# options and executing the appropriate CMake commands to realize the users'
+# selections.
+
include(AddLLVMDefinitions)
+include(CheckCCompilerFlag)
+include(CheckCXXCompilerFlag)
-# Run-time build mode; It is used for unittests.
-if(MSVC_IDE)
- # Expect "$(Configuration)", "$(OutDir)", etc.
- # It is expanded by msbuild or similar.
- set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}")
-elseif(NOT CMAKE_BUILD_TYPE STREQUAL "")
- # Expect "Release" "Debug", etc.
- # Or unittests could not run.
- set(RUNTIME_BUILD_MODE ${CMAKE_BUILD_TYPE})
-else()
- # It might be "."
- set(RUNTIME_BUILD_MODE "${CMAKE_CFG_INTDIR}")
+if( CMAKE_COMPILER_IS_GNUCXX )
+ set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
+elseif( MSVC )
+ set(LLVM_COMPILER_IS_GCC_COMPATIBLE OFF)
+elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
+ set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
endif()
-set(LIT_ARGS_DEFAULT "-sv")
-if (MSVC OR XCODE)
- set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
+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()
+ elseif(CMAKE_CXX_COMPILER_ID STREQUAL "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()
-set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}"
- CACHE STRING "Default options for lit")
if( LLVM_ENABLE_ASSERTIONS )
# MSVC doesn't like _DEBUG on release builds. See PR 4379.
if( NOT MSVC )
add_definitions( -D_DEBUG )
endif()
- # On Release builds cmake automatically defines NDEBUG, so we
+ # On non-Debug builds cmake automatically defines NDEBUG, so we
# explicitly undefine it:
- if( uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
+ if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
add_definitions( -UNDEBUG )
+ # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
+ set(REGEXP_NDEBUG "(^| )[/-]D *NDEBUG($| )")
+ string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
+ CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
+ string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
+ CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
+ string (REGEX REPLACE "${REGEXP_NDEBUG}" " "
+ CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")
endif()
else()
if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
endif()
if(WIN32)
+ set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
if(CYGWIN)
set(LLVM_ON_WIN32 0)
set(LLVM_ON_UNIX 1)
else(CYGWIN)
set(LLVM_ON_WIN32 1)
set(LLVM_ON_UNIX 0)
-
- # This is effective only on Win32 hosts to use gnuwin32 tools.
- set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
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)
+set(EXEEXT ${CMAKE_EXECUTABLE_SUFFIX})
+set(LTDL_SHLIB_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
+set(LLVM_PLUGIN_EXT ${CMAKE_SHARED_MODULE_SUFFIX})
+
+function(add_flag_or_print_warning flag)
+ check_c_compiler_flag(${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()
+
+function(append value)
+ foreach(variable ${ARGN})
+ set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
+ endforeach(variable)
+endfunction()
+
+function(append_if condition value)
+ if (${condition})
+ foreach(variable ${ARGN})
+ set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
+ endforeach(variable)
+ endif()
+endfunction()
+
+macro(add_flag_if_supported flag)
+ check_c_compiler_flag(${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 "${flag}" CMAKE_CXX_FLAGS)
+endmacro()
+
if( LLVM_ENABLE_PIC )
if( XCODE )
# Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't
# know how to disable this, so just force ENABLE_PIC off for now.
message(WARNING "-fPIC not supported with Xcode.")
- elseif( WIN32 )
+ elseif( WIN32 OR CYGWIN)
# On Windows all code is PIC. MinGW warns if -fPIC is used.
else()
- include(CheckCXXCompilerFlag)
- check_cxx_compiler_flag("-fPIC" SUPPORTS_FPIC_FLAG)
- if( SUPPORTS_FPIC_FLAG )
- message(STATUS "Building with -fPIC")
- set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
- set(CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
- else( SUPPORTS_FPIC_FLAG )
- message(WARNING "-fPIC not supported.")
+ add_flag_or_print_warning("-fPIC")
+
+ if( WIN32 OR CYGWIN)
+ # MinGW warns if -fvisibility-inlines-hidden is used.
+ else()
+ check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG)
+ append_if(SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG "-fvisibility-inlines-hidden" CMAKE_CXX_FLAGS)
endif()
endif()
endif()
if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
# TODO: support other platforms and toolchains.
- option(LLVM_BUILD_32_BITS "Build 32 bits executables and libraries." OFF)
if( LLVM_BUILD_32_BITS )
message(STATUS "Building 32 bits executables and libraries.")
add_llvm_definitions( -m32 )
- list(APPEND CMAKE_EXE_LINKER_FLAGS -m32)
- list(APPEND CMAKE_SHARED_LINKER_FLAGS -m32)
+ set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -m32")
+ set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m32")
+ set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -m32")
endif( LLVM_BUILD_32_BITS )
endif( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
+# On Win32 using MS tools, provide an option to set the number of parallel jobs
+# to use.
+if( MSVC_IDE )
+ set(LLVM_COMPILER_JOBS "0" CACHE STRING
+ "Number of parallel compiler jobs. 0 means use all processors. Default is 0.")
+ if( NOT LLVM_COMPILER_JOBS STREQUAL "1" )
+ 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()
+ endif()
+ else()
+ message(STATUS "Parallel compilation disabled")
+ endif()
+endif()
+
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( MSVC10 )
+ # MSVC 10 will complain about headers in the STL not being exported, but
+ # will not complain in MSVC 11.
+ add_llvm_definitions(
+ -wd4275 # Suppress 'An exported class was derived from a class that was not exported.'
+ )
+ elseif( 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_DEPRECATE
-D_SCL_SECURE_NO_WARNINGS
+ # Disabled warnings.
-wd4146 # Suppress 'unary minus operator applied to unsigned type, result still unsigned'
-wd4180 # Suppress 'qualifier applied to function type has no meaning; 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'
-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'
-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'
-wd4800 # Suppress ''type' : forcing value to bool 'true' or 'false' (performance warning)'
- -wd4065 # Suppress 'switch statement contains 'default' but no 'case' labels'
+ -wd4291 # Suppress ''declaration' : no matching operator delete found; memory will not be freed if initialization throws an exception'
+
+ # Promoted warnings.
+ -w14062 # Promote 'enumerator in switch of enum is not handled' to level 1 warning.
- -w14062 # Promote "enumerator in switch of enum is not handled" to level 1 warning.
+ # Promoted warnings to errors.
+ -we4238 # Promote 'nonstandard extension used : class rvalue used as lvalue' to error.
)
# Enable warnings
if (LLVM_ENABLE_WARNINGS)
- add_llvm_definitions( /W4 /Wall )
+ add_llvm_definitions( /W4 )
if (LLVM_ENABLE_PEDANTIC)
# No MSVC equivalent available
endif (LLVM_ENABLE_PEDANTIC)
if (LLVM_ENABLE_WERROR)
add_llvm_definitions( /WX )
endif (LLVM_ENABLE_WERROR)
-elseif( CMAKE_COMPILER_IS_GNUCXX )
+elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
if (LLVM_ENABLE_WARNINGS)
- add_llvm_definitions( -Wall -W -Wno-unused-parameter -Wwrite-strings )
- if (LLVM_ENABLE_PEDANTIC)
- add_llvm_definitions( -pedantic -Wno-long-long )
- endif (LLVM_ENABLE_PEDANTIC)
+ append("-Wall -W -Wno-unused-parameter -Wwrite-strings" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+
+ # Turn off missing field initializer warnings for gcc to avoid noise from
+ # false positives with empty {}. Turn them on otherwise (they're off by
+ # default for clang).
+ check_cxx_compiler_flag("-Wmissing-field-initializers" CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG)
+ if (CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG)
+ if (CMAKE_COMPILER_IS_GNUCXX)
+ append("-Wno-missing-field-initializers" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+ else()
+ append("-Wmissing-field-initializers" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+ endif()
+ 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)
+ 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)
endif (LLVM_ENABLE_WARNINGS)
if (LLVM_ENABLE_WERROR)
add_llvm_definitions( -Werror )
endif (LLVM_ENABLE_WERROR)
+ if (LLVM_ENABLE_CXX11)
+ check_cxx_compiler_flag("-std=c++11" CXX_SUPPORTS_CXX11)
+ append_if(CXX_SUPPORTS_CXX11 "-std=c++11" CMAKE_CXX_FLAGS)
+ endif (LLVM_ENABLE_CXX11)
+ if(LLVM_ENABLE_LIBCXX)
+ check_cxx_compiler_flag("-stdlib=libc++" CXX_SUPPORTS_STDLIB)
+ append_if(CXX_SUPPORTS_STDLIB "-stdlib=libc++" CMAKE_CXX_FLAGS)
+ append_if(CXX_SUPPORTS_STDLIB "-stdlib=libc++" CMAKE_EXE_LINKER_FLAGS)
+ append_if(CXX_SUPPORTS_STDLIB "-stdlib=libc++" CMAKE_SHARED_LINKER_FLAGS)
+ append_if(CXX_SUPPORTS_STDLIB "-stdlib=libc++" CMAKE_MODULE_LINKER_FLAGS)
+ endif ()
endif( MSVC )
-add_llvm_definitions( -D__STDC_LIMIT_MACROS )
+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")
+ if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
+ NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
+ add_flag_if_supported("-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")
+ endif()
+endmacro()
+
+# Turn on sanitizers if necessary.
+if(LLVM_USE_SANITIZER)
+ if (LLVM_ON_UNIX)
+ if (LLVM_USE_SANITIZER STREQUAL "Address")
+ append_common_sanitizer_flags()
+ add_flag_or_print_warning("-fsanitize=address")
+ elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
+ append_common_sanitizer_flags()
+ add_flag_or_print_warning("-fsanitize=memory")
+ if(LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
+ add_flag_or_print_warning("-fsanitize-memory-track-origins")
+ endif()
+ else()
+ message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")
+ endif()
+ else()
+ message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
+ endif()
+endif()
+
+# Turn on -gsplit-dwarf if requested
+if(LLVM_USE_SPLIT_DWARF)
+ add_llvm_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()
projects / oota-llvm.git / blobdiff