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GNU C Library master sources branch master updated. glibc-2.26.9000-755-gec72135

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- Log -----------------------------------------------------------------;a=commitdiff;h=ec72135e5f1d061cb5cf7cd1b855fd6290be10d9

commit ec72135e5f1d061cb5cf7cd1b855fd6290be10d9
Author: Joseph Myers <>
Date:   Tue Nov 14 17:50:36 2017 +0000

    Fix string/bug-strncat1.c build with GCC 8.
    GCC 8 warns about strncat calls with truncated output.
    string/bug-strncat1.c tests such a call; this patch disables the
    warning for it.
    Tested (compilation) with GCC 8 for x86_64-linux-gnu with (in conjunction with Martin's patch to allow
    glibc to build).
    	* string/bug-strncat1.c: Include <libc-diag.h>.
    	(main): Disable -Wstringop-truncation for strncat call for GCC 8.

diff --git a/ChangeLog b/ChangeLog
index bc5ff14..579185d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-11-14  Joseph Myers  <>
+	* string/bug-strncat1.c: Include <libc-diag.h>.
+	(main): Disable -Wstringop-truncation for strncat call for GCC 8.
 2017-11-13  Claude Paroz <>
 	[BZ #22387]
diff --git a/string/bug-strncat1.c b/string/bug-strncat1.c
index f1b5c37..b22beba 100644
--- a/string/bug-strncat1.c
+++ b/string/bug-strncat1.c
@@ -4,13 +4,21 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <libc-diag.h>
 char d[3] = "\0\1\2";
 main (void)
+#if __GNUC_PREREQ (8, 0)
+  /* GCC 8 warns about strncat truncating output; this is deliberately
+     tested here.  */
+  DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-truncation");
   strncat (d, "\5\6", 1);
   if (d[0] != '\5')
       puts ("d[0] != '\\5'");


Summary of changes:
 ChangeLog             |    5 +++++
 string/bug-strncat1.c |    8 ++++++++
 2 files changed, 13 insertions(+), 0 deletions(-)

GNU C Library master sources

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