diff options
Diffstat (limited to 'cmake/modules/HandleLLVMOptions.cmake')
| -rw-r--r-- | cmake/modules/HandleLLVMOptions.cmake | 79 |
1 files changed, 69 insertions, 10 deletions
diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake index b8577f7..6cc6d65 100644 --- a/cmake/modules/HandleLLVMOptions.cmake +++ b/cmake/modules/HandleLLVMOptions.cmake @@ -2,6 +2,10 @@ # options and executing the appropriate CMake commands to realize the users' # selections. +# This is commonly needed so make sure it's defined before we include anything +# else. +string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE) + include(HandleLLVMStdlib) include(AddLLVMDefinitions) include(CheckCCompilerFlag) @@ -25,9 +29,6 @@ if(NOT LLVM_FORCE_USE_OLD_TOOLCHAIN) set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) set(OLD_CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}) set(CMAKE_REQUIRED_FLAGS "-std=c++0x") - if (ANDROID) - set(CMAKE_REQUIRED_LIBRARIES "atomic") - endif() check_cxx_source_compiles(" #include <atomic> std::atomic<float> x(0.0f); @@ -131,7 +132,7 @@ 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}") + 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} ${flag}" PARENT_SCOPE) @@ -170,6 +171,10 @@ if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 ) endif( LLVM_BUILD_32_BITS ) endif( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32 ) +if (LLVM_BUILD_STATIC) + set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static") +endif() + if( XCODE ) # For Xcode enable several build settings that correspond to # many warnings that are on by default in Clang but are @@ -240,11 +245,16 @@ if( MSVC ) -wd4146 # Suppress 'unary minus operator applied to unsigned type, result still unsigned' -wd4180 # Suppress 'qualifier applied to function type has no meaning; ignored' -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' -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' + -wd4456 # Suppress 'declaration of 'var' hides local variable' + -wd4457 # Suppress 'declaration of 'var' hides function parameter' + -wd4458 # Suppress 'declaration of 'var' hides class member' + -wd4459 # Suppress 'declaration of 'var' hides global declaration' -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' -wd4722 # Suppress 'function' : destructor never returns, potential memory leak @@ -270,6 +280,7 @@ if( MSVC ) elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE ) if (LLVM_ENABLE_WARNINGS) append("-Wall -W -Wno-unused-parameter -Wwrite-strings" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) + append("-Wcast-qual" 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 @@ -287,13 +298,25 @@ elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE ) 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 ${CMAKE_REQUIRED_FLAGS} -Werror -Wcomment) + set(CMAKE_REQUIRED_FLAGS "${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}) @@ -322,6 +345,25 @@ elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE ) 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) @@ -350,6 +392,13 @@ if(LLVM_USE_SANITIZER) if(LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins") 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) + elseif (LLVM_USE_SANITIZER STREQUAL "Thread") + append_common_sanitizer_flags() + append("-fsanitize=thread" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) else() message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}") endif() @@ -360,7 +409,7 @@ endif() # Turn on -gsplit-dwarf if requested if(LLVM_USE_SPLIT_DWARF) - add_llvm_definitions("-gsplit-dwarf") + add_definitions("-gsplit-dwarf") endif() add_llvm_definitions( -D__STDC_CONSTANT_MACROS ) @@ -408,11 +457,21 @@ if(MSVC) string(REGEX REPLACE "(^| ) */GR-? *( |$)" "\\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) - # DLL platform(s) don't support plugins. - set(LLVM_ENABLE_PLUGINS OFF) + if(BUILD_SHARED_LIBS) + set(LLVM_ENABLE_PLUGINS ON) + else() + set(LLVM_ENABLE_PLUGINS OFF) + endif() else() set(LLVM_ENABLE_PLUGINS ON) endif() |