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-rw-r--r--libcxx/cmake/config-ix.cmake7
-rw-r--r--libcxx/src/CMakeLists.txt4
2 files changed, 11 insertions, 0 deletions
diff --git a/libcxx/cmake/config-ix.cmake b/libcxx/cmake/config-ix.cmake
index 730ee7e164a..23ae71025e5 100644
--- a/libcxx/cmake/config-ix.cmake
+++ b/libcxx/cmake/config-ix.cmake
@@ -80,8 +80,15 @@ if(WIN32 AND NOT MINGW)
set(LIBCXX_HAS_PTHREAD_LIB NO)
set(LIBCXX_HAS_M_LIB NO)
set(LIBCXX_HAS_RT_LIB NO)
+ set(LIBCXX_HAS_SYSTEM_LIB NO)
+elseif(APPLE)
+ check_library_exists(System write "" LIBCXX_HAS_SYSTEM_LIB)
+ set(LIBCXX_HAS_PTHREAD_LIB NO)
+ set(LIBCXX_HAS_M_LIB NO)
+ set(LIBCXX_HAS_RT_LIB NO)
else()
check_library_exists(pthread pthread_create "" LIBCXX_HAS_PTHREAD_LIB)
check_library_exists(m ccos "" LIBCXX_HAS_M_LIB)
check_library_exists(rt clock_gettime "" LIBCXX_HAS_RT_LIB)
+ set(LIBCXX_HAS_SYSTEM_LIB NO)
endif()
diff --git a/libcxx/src/CMakeLists.txt b/libcxx/src/CMakeLists.txt
index 3c31548c2c4..5d9cc01d165 100644
--- a/libcxx/src/CMakeLists.txt
+++ b/libcxx/src/CMakeLists.txt
@@ -140,6 +140,10 @@ function(cxx_link_system_libraries target)
target_add_compile_flags_if_supported(${target} PRIVATE "/Zl")
target_add_link_flags_if_supported(${target} PRIVATE "/nodefaultlib")
+ if (LIBCXX_HAS_SYSTEM_LIB)
+ target_link_libraries(${target} PUBLIC System)
+ endif()
+
if (LIBCXX_HAS_PTHREAD_LIB)
target_link_libraries(${target} PUBLIC pthread)
endif()
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