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llvm-project/libcxx/cmake/config-ix.cmake

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CMake
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Add CMake build and fix major Linux blockers. llvm-svn: 121510
2010-12-11 03:47:54 +08:00
include(CheckLibraryExists)
include(CheckCXXCompilerFlag)
libc++: perform configuration checks with -nodefaultlibs We're compiling libc++ with -nodefaultlibs, so we should also pass this option during the configuration checks to ensure those checks are consistent with the actual build. The primary motivation here is to ease cross-compilation against a non-standard set of C++ libraries. Previously, the configuration checks would attempt to link against the standard C++ libraries, which would cause link failures when cross-compiling, even though the actual library link would go through correctly (because of the use of -nodefaultlibs and explicitly specifying any needed libraries). This is more correct even ignoring the motivation, however. Patch by Shoaib Meenai! llvm-svn: 280015
2016-08-30 05:33:37 +08:00
check_library_exists(c fopen "" LIBCXX_HAS_C_LIB)
if (NOT LIBCXX_USE_COMPILER_RT)
check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXX_HAS_GCC_S_LIB)
endif()
# libc++ is built with -nodefaultlibs, so we want all our checks to also
# use this option, otherwise we may end up with an inconsistency between
# the flags we think we require during configuration (if the checks are
# performed without -nodefaultlibs) and the flags that are actually
# required during compilation (which has the -nodefaultlibs). libc is
# required for the link to go through. We remove sanitizers from the
# configuration checks to avoid spurious link errors.
check_cxx_compiler_flag(-nodefaultlibs LIBCXX_SUPPORTS_NODEFAULTLIBS_FLAG)
if (LIBCXX_SUPPORTS_NODEFAULTLIBS_FLAG)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nodefaultlibs")
if (LIBCXX_HAS_C_LIB)
list(APPEND CMAKE_REQUIRED_LIBRARIES c)
endif ()
if (LIBCXX_USE_COMPILER_RT)
list(APPEND CMAKE_REQUIRED_LIBRARIES -rtlib=compiler-rt)
elseif (LIBCXX_HAS_GCC_S_LIB)
list(APPEND CMAKE_REQUIRED_LIBRARIES gcc_s)
endif ()
if (CMAKE_C_FLAGS MATCHES -fsanitize OR CMAKE_CXX_FLAGS MATCHES -fsanitize)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize=all")
endif ()
endif ()
Re-commit "Introduce a cmake module to figure out whether we need to link with libatomic." This re-applies commit r260235. However, this time we add -gcc-toolchain to the compiler's flags when the user has specified the LIBCXX_GCC_TOOLCHAIN variable. llvm-svn: 260515
2016-02-11 20:43:04 +08:00
include(CheckLibcxxAtomic)
Add CMake build and fix major Linux blockers. llvm-svn: 121510
2010-12-11 03:47:54 +08:00
# Check compiler flags
Reapply working parts of CMake cleanup. This patch adds the working parts of r243503. The difference with this patch is that it doesn't include the HandleLLVMOptions.cmake file. llvm-svn: 243698
2015-07-31 06:30:34 +08:00
[libcxx] Add support for LLVM_USE_SANITIZER to libcxx when being built standalone and in-tree Summary: This patch adds support for LLVM_USE_SANITIZER when being built in-tree and standalone. This patch does the following things: 1. define the LLVM_USE_SANITIZER option to "" when being built standalone. This also helps show we support it. 2. Translate LLVM_USE_SANITIZER when standalone in a very similar way done in llvm/cmake/HandleLLVMOptions.cmake. 3. Add config.llvm_use_sanitizer to lit.site.cfg.in 4. Add code to translate config.llvm_use_sanitizer's value into the needed compile flags in lit.cfg. Currently lit.cfg assumes that that the compiler supports '-fno-omit-frame-pointer' while CMakeLists.txt actually checks to see if its supported. We could pass this information to lit but I'm not sure its needed. Reviewers: mclow.lists, danalbert Reviewed By: danalbert Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D4949 llvm-svn: 215872
2014-08-18 13:03:46 +08:00
check_cxx_compiler_flag(/WX LIBCXX_HAS_WX_FLAG)
check_cxx_compiler_flag(/WX- LIBCXX_HAS_NO_WX_FLAG)
check_cxx_compiler_flag(/EHsc LIBCXX_HAS_EHSC_FLAG)
check_cxx_compiler_flag(/EHs- LIBCXX_HAS_NO_EHS_FLAG)
check_cxx_compiler_flag(/EHa- LIBCXX_HAS_NO_EHA_FLAG)
check_cxx_compiler_flag(/GR- LIBCXX_HAS_NO_GR_FLAG)
Add CMake build and fix major Linux blockers. llvm-svn: 121510
2010-12-11 03:47:54 +08:00
Reapply working parts of CMake cleanup. This patch adds the working parts of r243503. The difference with this patch is that it doesn't include the HandleLLVMOptions.cmake file. llvm-svn: 243698
2015-07-31 06:30:34 +08:00
Add CMake build and fix major Linux blockers. llvm-svn: 121510
2010-12-11 03:47:54 +08:00
# Check libraries
check_library_exists(pthread pthread_create "" LIBCXX_HAS_PTHREAD_LIB)
check_library_exists(m ccos "" LIBCXX_HAS_M_LIB)
http://llvm.org/bugs/show_bug.cgi?id=9399 fixed by Ryuta Suzuki llvm-svn: 131961
2011-05-24 20:54:00 +08:00
check_library_exists(rt clock_gettime "" LIBCXX_HAS_RT_LIB)