1 files changed, 8 insertions, 0 deletions

diff --git a/src/systty.h b/src/systty.h
index fda88d4c9da..4b8c2262ea0 100644
--- a/src/systty.h
+++ b/src/systty.h
@@ -296,7 +296,15 @@ static struct sensemode {
 
 #ifdef __GNU_LIBRARY__
 /* GNU libc by default defines getpgrp with no args on all systems.  */
+#if __GLIBC__  >= 2
+/* glibc-2.1 adds the BSD compatibility getpgrp function
+   if you use __BSD_SOURCE, which Emacs does on GNU/Linux systems.  */
+#if __GLIBC_MINOR__ < 1 || ! defined (_BSD_SOURCE)
 #define GETPGRP_NO_ARG
+#endif
+#else /* __GLIBC__ < 2 */
+#define GETPGRP_NO_ARG
+#endif /* __GLIBC__ < 2 */
 #else /* not __GNU_LIBRARY__ */
 #if defined (USG) && !defined (GETPGRP_NEEDS_ARG)
 #  if !defined (GETPGRP_NO_ARG)