[PATCH] D16613: Use LLVM's CheckAtomic cmake module to figure out whether we need to link with libatomic.
Vasileios Kalintiris via cfe-commits
cfe-commits at lists.llvm.org
Tue Jan 26 16:42:56 PST 2016
vkalintiris created this revision.
vkalintiris added reviewers: dsanders, mclow.lists, EricWF, jroelofs.
vkalintiris added a subscriber: cfe-commits.
This fixes the tests under std/atomics for 32-bit MIPS CPUs where the
8-byte atomic operations call into the libatomic library.
http://reviews.llvm.org/D16613
Files:
cmake/config-ix.cmake
lib/CMakeLists.txt
test/CMakeLists.txt
test/libcxx/test/target_info.py
test/lit.site.cfg.in
Index: test/lit.site.cfg.in
===================================================================
--- test/lit.site.cfg.in
+++ test/lit.site.cfg.in
@@ -20,6 +20,7 @@
config.target_info = "@LIBCXX_TARGET_INFO@"
config.executor = "@LIBCXX_EXECUTOR@"
config.llvm_unwinder = "@LIBCXXABI_USE_LLVM_UNWINDER@"
+config.use_libatomic = "@LIBCXX_HAS_ATOMIC_LIB@"
# Let the main config do the real work.
lit_config.load_config(config, "@LIBCXX_SOURCE_DIR@/test/lit.cfg")
Index: test/libcxx/test/target_info.py
===================================================================
--- test/libcxx/test/target_info.py
+++ test/libcxx/test/target_info.py
@@ -172,6 +172,9 @@
flags += ['-lunwind', '-ldl']
else:
flags += ['-lgcc_s', '-lgcc']
+ use_libatomic = self.full_config.get_lit_bool('use_libatomic', False)
+ if use_libatomic:
+ flags += ['-latomic']
san = self.full_config.get_lit_conf('use_sanitizer', '').strip()
if san:
# The libraries and their order are taken from the
Index: test/CMakeLists.txt
===================================================================
--- test/CMakeLists.txt
+++ test/CMakeLists.txt
@@ -15,6 +15,7 @@
pythonize_bool(LIBCXX_BUILD_32_BITS)
pythonize_bool(LIBCXX_GENERATE_COVERAGE)
pythonize_bool(LIBCXXABI_USE_LLVM_UNWINDER)
+pythonize_bool(LIBCXX_HAS_ATOMIC_LIB)
# The tests shouldn't link to any ABI library when it has been linked into
# libc++ statically or via a linker script.
Index: lib/CMakeLists.txt
===================================================================
--- lib/CMakeLists.txt
+++ lib/CMakeLists.txt
@@ -79,6 +79,7 @@
add_library_flags_if(LIBCXX_HAS_M_LIB m)
add_library_flags_if(LIBCXX_HAS_RT_LIB rt)
add_library_flags_if(LIBCXX_HAS_GCC_S_LIB gcc_s)
+add_library_flags_if(LIBCXX_HAS_ATOMIC_LIB atomic)
# Setup flags.
add_flags_if_supported(-fPIC)
Index: cmake/config-ix.cmake
===================================================================
--- cmake/config-ix.cmake
+++ cmake/config-ix.cmake
@@ -1,5 +1,6 @@
include(CheckLibraryExists)
include(CheckCXXCompilerFlag)
+include(CheckAtomic)
# Check compiler flags
@@ -17,3 +18,7 @@
check_library_exists(m ccos "" LIBCXX_HAS_M_LIB)
check_library_exists(rt clock_gettime "" LIBCXX_HAS_RT_LIB)
check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXX_HAS_GCC_S_LIB)
+
+if (NOT HAVE_CXX_ATOMICS_WITHOUT_LIB)
+ set(LIBCXX_HAS_ATOMIC_LIB True)
+endif()
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