diff options
| -rw-r--r-- | lib/replace/autoconf-2.60.m4 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/replace/autoconf-2.60.m4 b/lib/replace/autoconf-2.60.m4 index acdcd38efe..2d5dbc1661 100644 --- a/lib/replace/autoconf-2.60.m4 +++ b/lib/replace/autoconf-2.60.m4 @@ -179,6 +179,7 @@ AC_DEFUN([AC_PROG_CC_C99], # ------------------------ # Enable extensions on systems that normally disable them, # typically due to standards-conformance issues. +m4_ifndef([AC_USE_SYSTEM_EXTENSIONS],[ AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS], [ AC_BEFORE([$0], [AC_COMPILE_IFELSE]) @@ -208,3 +209,4 @@ AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS], AC_DEFINE([__EXTENSIONS__]) AC_DEFINE([_POSIX_PTHREAD_SEMANTICS]) ]) +]) |