Avoid a crash of a configure test on some x86_64 systems.

diff --git a/ChangeLog b/ChangeLog
index 65d495a..f9159cb 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-12-17  Bruno Haible  <bruno@clisp.org>
+
+       * m4/printf.m4 (gl_PRINTF_INFINITE_LONG_DOUBLE): Use GL_NOCRASH to
+       avoid a segmentation fault of the configure test on x86_64 systems.
+
 2007-12-15  Jim Meyering  <meyering@redhat.com>
 
        * build-aux/gnupload (GPG): Don't hard-code absolute name of gpg binary.

diff --git a/m4/printf.m4 b/m4/printf.m4
index d5ac941..37bf905 100644 (file)
--- a/m4/printf.m4
+++ b/m4/printf.m4
@@ -1,4 +1,4 @@
-# printf.m4 serial 20
+# printf.m4 serial 21
 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,
@@ -240,6 +240,7 @@ AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE],
         [gl_cv_func_printf_infinite_long_double],
         [
           AC_TRY_RUN([
+]GL_NOCRASH[
 #include <float.h>
 #include <stdio.h>
 #include <string.h>
@@ -265,6 +266,7 @@ static char buf[10000];
 static long double zeroL = 0.0L;
 int main ()
 {
+  nocrash_init();
   if (sprintf (buf, "%Lf", 1.0L / 0.0L) < 0
       || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
     return 1;