Re: Configure problem when compiling with -D_FORTIFY_SOURCE

[Bruno Haible]

Greg Schafer wrote:
> Size of 10000 seems to work. Size of 1000 doesn't. Using asprintf also
> seems to not crash with a size of 100.

OK, then the bug is in gnulib's tests, not in glibc. Thanks for these tests.

I'm applying this:

2007-09-16  Bruno Haible  <address@hidden>

        * m4/printf.m4 (gl_PRINTF_LONG_DOUBLE, gl_PRINTF_INFINITE,
        gl_PRINTF_INFINITE_LONG_DOUBLE): Increase buf's size from 100 to 10000.
        Needed on glibc-2.6.1 with -fstack-protector -D_FORTIFY_SOURCE=2.
        Reported by Greg Schafer <address@hidden>.

--- m4/printf.m4        13 Jun 2007 01:28:35 -0000      1.35
+++ m4/printf.m4        16 Sep 2007 11:40:01 -0000
@@ -1,4 +1,4 @@
-# printf.m4 serial 15
+# printf.m4 serial 16
 dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -95,7 +95,7 @@
       AC_TRY_RUN([
 #include <stdio.h>
 #include <string.h>
-static char buf[100];
+static char buf[10000];
 int main ()
 {
   buf[0] = '\0';
@@ -156,7 +156,7 @@
     }
   return 0;
 }
-static char buf[100];
+static char buf[10000];
 static double zero = 0.0;
 int main ()
 {
@@ -261,7 +261,7 @@
     }
   return 0;
 }
-static char buf[100];
+static char buf[10000];
 static long double zeroL = 0.0L;
 int main ()
 {