cf/broken-snprintf.m4

   1 dnl $Id$
   2 dnl
   3 AC_DEFUN([AC_BROKEN_SNPRINTF], [
   4 AC_CACHE_CHECK(for working snprintf,ac_cv_func_snprintf_working,
   5 ac_cv_func_snprintf_working=yes
   6 AC_TRY_RUN([
   7 #include <stdio.h>
   8 #include <string.h>
   9 int main()
  10 {
  11         char foo[[3]];
  12         snprintf(foo, 2, "12");
  13         return strcmp(foo, "1");
  14 }],:,ac_cv_func_snprintf_working=no,:))
  15
  16 if test "$ac_cv_func_snprintf_working" = yes; then
  17         AC_DEFINE_UNQUOTED(HAVE_SNPRINTF, 1, [define if you have a working snprintf])
  18 fi
  19 if test "$ac_cv_func_snprintf_working" = yes; then
  20 AC_NEED_PROTO([#include <stdio.h>],snprintf)
  21 fi
  22 ])
  23
  24 AC_DEFUN([AC_BROKEN_VSNPRINTF],[
  25 AC_CACHE_CHECK(for working vsnprintf,ac_cv_func_vsnprintf_working,
  26 ac_cv_func_vsnprintf_working=yes
  27 AC_TRY_RUN([
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <stdarg.h>
  31
  32 int foo(int num, ...)
  33 {
  34         char bar[[3]];
  35         va_list arg;
  36         va_start(arg, num);
  37         vsnprintf(bar, 2, "%s", arg);
  38         va_end(arg);
  39         return strcmp(bar, "1");
  40 }
  41
  42
  43 int main()
  44 {
  45         return foo(0, "12");
  46 }],:,ac_cv_func_vsnprintf_working=no,:))
  47
  48 if test "$ac_cv_func_vsnprintf_working" = yes; then
  49         AC_DEFINE_UNQUOTED(HAVE_VSNPRINTF, 1, [define if you have a working vsnprintf])
  50 fi
  51 if test "$ac_cv_func_vsnprintf_working" = yes; then
  52 AC_NEED_PROTO([#include <stdio.h>],vsnprintf)
  53 fi
  54 ])