[libc++] Do not define _LIBCPP_CLANG_VER for non-LLVM Clang
In r292833, we started defining _LIBCPP_CLANG_VER to 0 for Apple Clang.
The result is that AppleClang is detected as being a very old version
of LLVM Clang (version 0), which is obviously incorrect.
I believe this was added so that we don't have to check whether
_LIBCPP_CLANG_VER is defined prior to comparing it with a number
(which can trigger a warning). This commit also fixes the two
places that use the macro correspondingly.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@368880 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__config b/include/__config
index e49adb4..f1b7390 100644
--- a/include/__config
+++ b/include/__config
@@ -183,10 +183,6 @@
# define _LIBCPP_COMPILER_IBM
#endif
-#ifndef _LIBCPP_CLANG_VER
-#define _LIBCPP_CLANG_VER 0
-#endif
-
#if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L
#error "libc++ does not support using GCC with C++03. Please enable C++11"
#endif
@@ -484,7 +480,7 @@
#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
// No apple compilers support ""d and ""y at this time.
-#if _LIBCPP_CLANG_VER < 800 || defined(__apple_build_version__)
+#if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 800) || defined(__apple_build_version__)
#define _LIBCPP_HAS_NO_CXX20_CHRONO_LITERALS
#endif
@@ -1242,7 +1238,7 @@
#ifndef _LIBCPP_NODEBUG_TYPE
#if __has_attribute(__nodebug__) && \
- (defined(_LIBCPP_COMPILER_CLANG) && _LIBCPP_CLANG_VER >= 900)
+ (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 900)
#define _LIBCPP_NODEBUG_TYPE __attribute__((nodebug))
#else
#define _LIBCPP_NODEBUG_TYPE
