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CMake/Modules/Platform/Darwin-Clang.cmake

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OS X: Add platform-specific Clang compiler info files (#13536) Clang has the same interface as GNU except that we do not need to test for the deployment target and sysroot flags. Simply set variables CMAKE_${lang}_HAS_ISYSROOT CMAKE_${lang}_OSX_DEPLOYMENT_TARGET_FLAG to true because every version of Clang available on OS X supports these flags.
2012-09-17 23:34:50 +04:00
#=============================================================================
# Copyright 2002-2012 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
# This module is shared by multiple languages; use include blocker.
if(__DARWIN_COMPILER_CLANG)
return()
endif()
set(__DARWIN_COMPILER_CLANG 1)
macro(__darwin_compiler_clang lang)
OS X: Detect implicit link directories on modern toolchains We detect the implicit link directories for the toolchain by adding a flag to get verbose output from the compiler front-end while linking the ABI detection binary. Newer OS X toolchains based on Clang do not add the implicit link directories with -L options to their internal invocation of "ld". Instead they use a linker that comes with the toolchain and is already configured with the proper directories. Add the "-Wl,-v" option to ask "ld" to print its implicit directories. It displays them in a block such as: Library search paths: /... Parse this block to extract the implicit link directories. While at it, remove the checks introduced by commit efaf335b (Skip implicit link information on Xcode, 2009-07-23) and commit 5195a664 (Skip implicit link info for multiple OS X archs, 2009-09-22). Discard the non-system link directories added by Xcode. Discard all detected implicit libraries in the multi-architecture case but keep the directories. The directories are still useful without the libraries just to suppress addition of explicit -L options for them.
2012-12-05 20:49:13 +04:00
set(CMAKE_${lang}_VERBOSE_FLAG "-v -Wl,-v") # also tell linker to print verbose output
OS X: Add platform-specific Clang compiler info files (#13536) Clang has the same interface as GNU except that we do not need to test for the deployment target and sysroot flags. Simply set variables CMAKE_${lang}_HAS_ISYSROOT CMAKE_${lang}_OSX_DEPLOYMENT_TARGET_FLAG to true because every version of Clang available on OS X supports these flags.
2012-09-17 23:34:50 +04:00
set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-dynamiclib -Wl,-headerpad_max_install_names")
set(CMAKE_SHARED_MODULE_CREATE_${lang}_FLAGS "-bundle -Wl,-headerpad_max_install_names")
OS X: Always generate -isysroot if any SDK is in use Drop the last use of CMAKE_OSX_SYSROOT_DEFAULT. Replace internal platform variable CMAKE_${lang}_HAS_ISYSROOT with a more general CMAKE_${lang}_SYSROOT_FLAG variable. If the -isysroot flag exists and CMAKE_OSX_SYSROOT points to an SDK (not "/") then always add it to compiler command lines. This is already done in the Xcode IDE.
2012-09-21 16:53:42 +04:00
set(CMAKE_${lang}_SYSROOT_FLAG "-isysroot")
OS X: Add platform-specific Clang compiler info files (#13536) Clang has the same interface as GNU except that we do not need to test for the deployment target and sysroot flags. Simply set variables CMAKE_${lang}_HAS_ISYSROOT CMAKE_${lang}_OSX_DEPLOYMENT_TARGET_FLAG to true because every version of Clang available on OS X supports these flags.
2012-09-17 23:34:50 +04:00
set(CMAKE_${lang}_OSX_DEPLOYMENT_TARGET_FLAG "-mmacosx-version-min=")
endmacro()