[libc++] Guard cxx_experimental settings behind LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY
If you explicitly set LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY to OFF, your
project will fail to configure because the cxx_experimental target
doesn't exist.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@373809 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 1b18850..03bc126 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -395,14 +395,14 @@
COMPILE_FLAGS "${LIBCXX_COMPILE_FLAGS}"
OUTPUT_NAME "c++experimental"
)
+ cxx_add_common_build_flags(cxx_experimental)
+ # Overwrite the previously-set Standard flag with -std=c++14 if supported
+ check_flag_supported(-std=c++14)
+ if (NOT MSVC AND LIBCXX_SUPPORTS_STD_EQ_CXX14_FLAG)
+ target_compile_options(cxx_experimental PRIVATE "-std=c++14")
+ endif()
endif()
-cxx_add_common_build_flags(cxx_experimental)
-# Overwrite the previously-set Standard flag with -std=c++14 if supported
-check_flag_supported(-std=c++14)
-if (NOT MSVC AND LIBCXX_SUPPORTS_STD_EQ_CXX14_FLAG)
- target_compile_options(cxx_experimental PRIVATE "-std=c++14")
-endif()
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
file(GLOB LIBCXX_EXTERNAL_THREADING_SUPPORT_SOURCES ../test/support/external_threads.cpp)
