forked from OSchip/llvm-project
276 lines
10 KiB
CMake
276 lines
10 KiB
CMake
# 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)
|
|
|
|
if( CMAKE_COMPILER_IS_GNUCXX )
|
|
set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
|
|
elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
|
|
set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
|
|
endif()
|
|
|
|
if( LLVM_ENABLE_ASSERTIONS )
|
|
# MSVC doesn't like _DEBUG on release builds. See PR 4379.
|
|
if( NOT MSVC )
|
|
add_definitions( -D_DEBUG )
|
|
endif()
|
|
# On non-Debug builds cmake automatically defines NDEBUG, so we
|
|
# explicitly undefine it:
|
|
if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
|
|
add_definitions( -UNDEBUG )
|
|
# Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
|
|
string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
|
|
CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
|
|
endif()
|
|
else()
|
|
if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
|
|
if( NOT MSVC_IDE AND NOT XCODE )
|
|
add_definitions( -DNDEBUG )
|
|
endif()
|
|
endif()
|
|
endif()
|
|
|
|
if(WIN32)
|
|
if(CYGWIN)
|
|
set(LLVM_ON_WIN32 0)
|
|
set(LLVM_ON_UNIX 1)
|
|
else(CYGWIN)
|
|
set(LLVM_ON_WIN32 1)
|
|
set(LLVM_ON_UNIX 0)
|
|
endif(CYGWIN)
|
|
set(LTDL_SHLIB_EXT ".dll")
|
|
set(EXEEXT ".exe")
|
|
# Maximum path length is 160 for non-unicode paths
|
|
set(MAXPATHLEN 160)
|
|
else(WIN32)
|
|
if(UNIX)
|
|
set(LLVM_ON_WIN32 0)
|
|
set(LLVM_ON_UNIX 1)
|
|
if(APPLE)
|
|
set(LTDL_SHLIB_EXT ".dylib")
|
|
else(APPLE)
|
|
set(LTDL_SHLIB_EXT ".so")
|
|
endif(APPLE)
|
|
set(EXEEXT "")
|
|
# FIXME: Maximum path length is currently set to 'safe' fixed value
|
|
set(MAXPATHLEN 2024)
|
|
else(UNIX)
|
|
MESSAGE(SEND_ERROR "Unable to determine platform")
|
|
endif(UNIX)
|
|
endif(WIN32)
|
|
|
|
function(add_flag_or_print_warning flag)
|
|
check_c_compiler_flag(${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()
|
|
|
|
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 "${flag}" CMAKE_CXX_FLAGS)
|
|
endmacro()
|
|
|
|
if( LLVM_ENABLE_PIC )
|
|
if( XCODE )
|
|
# Xcode has -mdynamic-no-pic on by default, which overrides -fPIC. I don't
|
|
# know how to disable this, so just force ENABLE_PIC off for now.
|
|
message(WARNING "-fPIC not supported with Xcode.")
|
|
elseif( WIN32 OR CYGWIN)
|
|
# On Windows all code is PIC. MinGW warns if -fPIC is used.
|
|
else()
|
|
add_flag_or_print_warning("-fPIC")
|
|
|
|
if( WIN32 OR CYGWIN)
|
|
# MinGW warns if -fvisibility-inlines-hidden is used.
|
|
else()
|
|
check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG)
|
|
append_if(SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG "-fvisibility-inlines-hidden" CMAKE_CXX_FLAGS)
|
|
endif()
|
|
endif()
|
|
endif()
|
|
|
|
if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 )
|
|
# TODO: support other platforms and toolchains.
|
|
if( LLVM_BUILD_32_BITS )
|
|
message(STATUS "Building 32 bits executables and libraries.")
|
|
add_llvm_definitions( -m32 )
|
|
set(CMAKE_EXE_LINKER_FLAGS "${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( 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_CRT_SECURE_NO_DEPRECATE
|
|
-D_CRT_SECURE_NO_WARNINGS
|
|
-D_CRT_NONSTDC_NO_DEPRECATE
|
|
-D_CRT_NONSTDC_NO_WARNINGS
|
|
-D_SCL_SECURE_NO_DEPRECATE
|
|
-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'
|
|
-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'
|
|
-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.
|
|
|
|
# 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 )
|
|
if (LLVM_ENABLE_PEDANTIC)
|
|
# No MSVC equivalent available
|
|
endif (LLVM_ENABLE_PEDANTIC)
|
|
endif (LLVM_ENABLE_WARNINGS)
|
|
if (LLVM_ENABLE_WERROR)
|
|
add_llvm_definitions( /WX )
|
|
endif (LLVM_ENABLE_WERROR)
|
|
elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
|
|
if (LLVM_ENABLE_WARNINGS)
|
|
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)
|
|
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")
|
|
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
|
|
NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
|
|
add_flag_if_supported("-gline-tables-only")
|
|
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()
|
|
|
|
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()
|