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cmake: check for libc++ directly

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Rather than trying to infer libc++ use from platform and compiler, just
look for a defined symbol.
This commit is contained in:
Matthew Barr
2017-04-06 10:53:28 +10:00
parent 19c7161d04
commit b1c57f9f54
2 changed files with 6 additions and 4 deletions
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4
CMakeLists.txt
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@@ -9,6 +9,7 @@ set (HS_VERSION ${HS_MAJOR_VERSION}.${HS_MINOR_VERSION}.${HS_PATCH_VERSION})
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
include(CheckCXXSymbolExists)
INCLUDE (CheckFunctionExists)
INCLUDE (CheckIncludeFiles)
INCLUDE (CheckIncludeFileCXX)
@@ -264,6 +265,9 @@ CHECK_FUNCTION_EXISTS(_aligned_malloc HAVE__ALIGNED_MALLOC)
CHECK_C_COMPILER_FLAG(-fvisibility=hidden HAS_C_HIDDEN)
CHECK_CXX_COMPILER_FLAG(-fvisibility=hidden HAS_CXX_HIDDEN)
# are we using libc++
CHECK_CXX_SYMBOL_EXISTS(_LIBCPP_VERSION ciso646 HAVE_LIBCPP)
if (RELEASE_BUILD)
if (HAS_C_HIDDEN)
set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -fvisibility=hidden")