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llvm-project/llvm/cmake/modules/HandleLLVMStdlib.cmake

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[CMake] Move -stdlib=libc++ handling into its own file. r200744 moved this into cmake/config-ix.cmake, so that it would happen very early in the build process. However, standalone builds of Clang and other external projects never include this file (which is correct). Now, -stdlib=libc++ and the LLVM_COMPILER_IS_GCC_COMPATIBLE option are both set in a new include file, HandleLLVMStdlib, which is included by both config-ix.cmake and HandleLLVMOptions.cmake. This preserves existing behavior for projects relying on HandleLLVMOptions and still does the right thing for builds of LLVM itself. llvm-svn: 200811
2014-02-05 08:02:37 +08:00
# This CMake module is responsible for setting the standard library to libc++
# if the user has requested it.
if(NOT DEFINED LLVM_STDLIB_HANDLED)
set(LLVM_STDLIB_HANDLED ON)
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()
Teach the LLVM CMake build how to explicitly use libc++abi when using libc++. This lets me almost self-host on Linux with libc++ and libc++abi very simply. Currently, MCJIT and OrcJIT are failing due to uncaught exceptions, and the Go binding tests are failing to build due to not linking in the correct C++ standard library. llvm-svn: 231560
2015-03-07 18:30:34 +08:00
function(append value)
foreach(variable ${ARGN})
set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
endforeach(variable)
[CMake] Move -stdlib=libc++ handling into its own file. r200744 moved this into cmake/config-ix.cmake, so that it would happen very early in the build process. However, standalone builds of Clang and other external projects never include this file (which is correct). Now, -stdlib=libc++ and the LLVM_COMPILER_IS_GCC_COMPATIBLE option are both set in a new include file, HandleLLVMStdlib, which is included by both config-ix.cmake and HandleLLVMOptions.cmake. This preserves existing behavior for projects relying on HandleLLVMOptions and still does the right thing for builds of LLVM itself. llvm-svn: 200811
2014-02-05 08:02:37 +08:00
endfunction()
include(CheckCXXCompilerFlag)
if(LLVM_ENABLE_LIBCXX)
if(LLVM_COMPILER_IS_GCC_COMPATIBLE)
check_cxx_compiler_flag("-stdlib=libc++" CXX_SUPPORTS_STDLIB)
Teach the LLVM CMake build how to explicitly use libc++abi when using libc++. This lets me almost self-host on Linux with libc++ and libc++abi very simply. Currently, MCJIT and OrcJIT are failing due to uncaught exceptions, and the Go binding tests are failing to build due to not linking in the correct C++ standard library. llvm-svn: 231560
2015-03-07 18:30:34 +08:00
if(CXX_SUPPORTS_STDLIB)
append("-stdlib=libc++"
CMAKE_CXX_FLAGS CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS
CMAKE_MODULE_LINKER_FLAGS)
if(LLVM_ENABLE_LIBCXXABI)
append("-lc++abi"
CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS
CMAKE_MODULE_LINKER_FLAGS)
endif()
else()
message(WARNING "Can't specify libc++ with '-stdlib='")
endif()
[CMake] Move -stdlib=libc++ handling into its own file. r200744 moved this into cmake/config-ix.cmake, so that it would happen very early in the build process. However, standalone builds of Clang and other external projects never include this file (which is correct). Now, -stdlib=libc++ and the LLVM_COMPILER_IS_GCC_COMPATIBLE option are both set in a new include file, HandleLLVMStdlib, which is included by both config-ix.cmake and HandleLLVMOptions.cmake. This preserves existing behavior for projects relying on HandleLLVMOptions and still does the right thing for builds of LLVM itself. llvm-svn: 200811
2014-02-05 08:02:37 +08:00
else()
message(WARNING "Not sure how to specify libc++ for this compiler")
endif()
endif()
endif()