Fix build with older Clang versions without __has_extension

Change-Id: I505d3e4ad2fcd56ee229935d8543811a43923273 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2013-03-04 14:27:35 +01:00 · 2013-03-04 14:27:35 +01:00 · 163dcf2b71
commit 163dcf2b71
parent 1c90590768
1 changed files with 4 additions and 0 deletions
--- a/src/corelib/global/qcompilerdetection.h
+++ b/src/corelib/global/qcompilerdetection.h
@ -157,6 +157,10 @@
 #    define Q_CC_CLANG
 #    define Q_ASSUME_IMPL(expr)  if (expr){} else __builtin_unreachable()
 #    define Q_UNREACHABLE_IMPL() __builtin_unreachable()
+#    if !defined(__has_extension)
+#      /* Compatibility with older Clang versions */
+#      define __has_extension __has_feature
+#    endif
 #  else
 /* Plain GCC */
 #    if (__GNUC__ * 100 + __GNUC_MINOR__) >= 405