Make the buffer large enough, to avoid a buffer overflow.

diff --git a/ChangeLog b/ChangeLog
index d26212c..1bbbd27 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2007-09-16  Bruno Haible  <bruno@clisp.org>
+
+       * 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 <gschafer@zip.com.au>.
+
 2007-09-15  Bruno Haible  <bruno@clisp.org>
 
        * gnulib-tool (sed): Try a little harder to make bash understand the

diff --git a/m4/printf.m4 b/m4/printf.m4
index 70ac3a3..06ce939 100644 (file)
--- a/m4/printf.m4
+++ b/m4/printf.m4
@@ -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_DEFUN([gl_PRINTF_LONG_DOUBLE],
       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 @@ strisnan (const char *string, size_t start_index, size_t end_index)
     }
   return 0;
 }
-static char buf[100];
+static char buf[10000];
 static double zero = 0.0;
 int main ()
 {
@@ -261,7 +261,7 @@ strisnan (const char *string, size_t start_index, size_t end_index)
     }
   return 0;
 }
-static char buf[100];
+static char buf[10000];
 static long double zeroL = 0.0L;
 int main ()
 {