-# printf.m4 serial 18
+# 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,
[gl_cv_func_printf_infinite_long_double],
[
AC_TRY_RUN([
+]GL_NOCRASH[
#include <float.h>
#include <stdio.h>
#include <string.h>
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;
])
])
+dnl Test whether the *printf family of functions supports large precisions.
+dnl On mingw, precisions larger than 512 are treated like 512, in integer,
+dnl floating-point or pointer output. On BeOS, precisions larger than 1044
+dnl crash the program.
+dnl Result is gl_cv_func_printf_precision.
+
+AC_DEFUN([gl_PRINTF_PRECISION],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether printf supports large precisions],
+ [gl_cv_func_printf_precision],
+ [
+ AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[5000];
+int main ()
+{
+#ifdef __BEOS__
+ /* On BeOS, this would crash and show a dialog box. Avoid the crash. */
+ return 1;
+#endif
+ if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3)
+ return 1;
+ return 0;
+}], [gl_cv_func_printf_precision=yes], [gl_cv_func_printf_precision=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ # Guess no only on native Win32 and BeOS systems.
+ mingw* | pw*) gl_cv_func_printf_precision="guessing no" ;;
+ beos*) gl_cv_func_printf_precision="guessing no" ;;
+ *) gl_cv_func_printf_precision="guessing yes" ;;
+ esac
+changequote([,])dnl
+ ])
+ ])
+])
+
dnl Test whether the *printf family of functions recovers gracefully in case
dnl of an out-of-memory condition, or whether it crashes the entire program.
dnl Result is gl_cv_func_printf_enomem.
[
if test "$cross_compiling" = no; then
AC_LANG_CONFTEST([AC_LANG_SOURCE([
+]GL_NOCRASH[
changequote(,)dnl
#include <stdio.h>
#include <sys/types.h>
{
struct rlimit limit;
int ret;
+ nocrash_init ();
/* Some printf implementations allocate temporary space with malloc. */
/* On BSD systems, malloc() is limited by RLIMIT_DATA. */
#ifdef RLIMIT_DATA
dnl 8 = gl_PRINTF_POSITIONS
dnl 9 = gl_PRINTF_FLAG_GROUPING
dnl 10 = gl_PRINTF_FLAG_ZERO
-dnl 11 = gl_PRINTF_ENOMEM
-dnl 12 = gl_SNPRINTF_PRESENCE
-dnl 13 = gl_SNPRINTF_TRUNCATION_C99
-dnl 14 = gl_SNPRINTF_RETVAL_C99
-dnl 15 = gl_SNPRINTF_DIRECTIVE_N
-dnl 16 = gl_VSNPRINTF_ZEROSIZE_C99
+dnl 11 = gl_PRINTF_PRECISION
+dnl 12 = gl_PRINTF_ENOMEM
+dnl 13 = gl_SNPRINTF_PRESENCE
+dnl 14 = gl_SNPRINTF_TRUNCATION_C99
+dnl 15 = gl_SNPRINTF_RETVAL_C99
+dnl 16 = gl_SNPRINTF_DIRECTIVE_N
+dnl 17 = gl_VSNPRINTF_ZEROSIZE_C99
dnl
dnl 1 = checking whether printf supports size specifiers as in C99...
dnl 2 = checking whether printf supports 'long double' arguments...
dnl 8 = checking whether printf supports POSIX/XSI format strings with positions...
dnl 9 = checking whether printf supports the grouping flag...
dnl 10 = checking whether printf supports the zero flag correctly...
-dnl 11 = checking whether printf survives out-of-memory conditions...
-dnl 12 = checking for snprintf...
-dnl 13 = checking whether snprintf truncates the result as in C99...
-dnl 14 = checking whether snprintf returns a byte count as in C99...
-dnl 15 = checking whether snprintf fully supports the 'n' directive...
-dnl 16 = checking whether vsnprintf respects a zero size as in C99...
+dnl 11 = checking whether printf supports large precisions...
+dnl 12 = checking whether printf survives out-of-memory conditions...
+dnl 13 = checking for snprintf...
+dnl 14 = checking whether snprintf truncates the result as in C99...
+dnl 15 = checking whether snprintf returns a byte count as in C99...
+dnl 16 = checking whether snprintf fully supports the 'n' directive...
+dnl 17 = checking whether vsnprintf respects a zero size as in C99...
dnl
dnl . = yes, # = no.
dnl
-dnl 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
-dnl glibc 2.5 . . . . . . . . . . . . . . . .
-dnl glibc 2.3.6 . . . . # . . . . . . . . . . .
-dnl FreeBSD 5.4, 6.1 . . . . # . . . . # # . . . . .
-dnl MacOS X 10.3.9 . . . . # . . . . # # . . . . .
-dnl OpenBSD 3.9, 4.0 . ? ? ? # ? . . ? ? ? . . . ? ?
-dnl Cygwin 2007 (= Cygwin 1.5.24) . . . . # # . . . # ? . . . . .
-dnl Cygwin 2006 (= Cygwin 1.5.19) # . . . # # . . # # ? . . . . .
-dnl Solaris 10 . . # # # . . . . # . . . . . .
-dnl Solaris 2.6 ... 9 # . # # # # . . . # . . . . . .
-dnl Solaris 2.5.1 # . # # # # . . . # . # # # # #
-dnl AIX 5.2 . . # # # . . . . # . . . . . .
-dnl AIX 4.3.2, 5.1 # . # # # # . . . # . . . . . .
-dnl HP-UX 11.31 . . . . # . . . . # . . . # # .
-dnl HP-UX 10.20, 11.{00,11,23} # . . . # # . . . # . . . # # #
-dnl IRIX 6.5 # . # # # # . . . # . . . # . .
-dnl OSF/1 5.1 # . # # # # . . . # . . . # . #
-dnl OSF/1 4.0d # . # # # # . . . # . # # # # #
-dnl NetBSD 4.0 . ? ? ? ? ? . . ? ? ? . . . ? ?
-dnl NetBSD 3.0 . . . . # # . # # # # . . . . .
-dnl BeOS # # . # # # . # . . ? . . . . .
-dnl mingw # # # # # # . # # # ? . # # # .
+dnl 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
+dnl glibc 2.5 . . . . . . . . . . . . . . . . .
+dnl glibc 2.3.6 . . . . # . . . . . . . . . . . .
+dnl FreeBSD 5.4, 6.1 . . . . # . . . . # . # . . . . .
+dnl MacOS X 10.3.9 . . . . # . . . . # . # . . . . .
+dnl OpenBSD 3.9, 4.0 . ? ? ? # ? . . ? ? ? ? . . . ? ?
+dnl Cygwin 2007 (= Cygwin 1.5.24) . . . . # # . . . # ? ? . . . . .
+dnl Cygwin 2006 (= Cygwin 1.5.19) # . . . # # . . # # ? ? . . . . .
+dnl Solaris 10 . . # # # . . . . # . . . . . . .
+dnl Solaris 2.6 ... 9 # . # # # # . . . # . . . . . . .
+dnl Solaris 2.5.1 # . # # # # . . . # . . # # # # #
+dnl AIX 5.2 . . # # # . . . . # . . . . . . .
+dnl AIX 4.3.2, 5.1 # . # # # # . . . # . . . . . . .
+dnl HP-UX 11.31 . . . . # . . . . # . . . . # # .
+dnl HP-UX 10.20, 11.{00,11,23} # . . . # # . . . # . . . . # # #
+dnl IRIX 6.5 # . # # # # . . . # . . . . # . .
+dnl OSF/1 5.1 # . # # # # . . . # . . . . # . #
+dnl OSF/1 4.0d # . # # # # . . . # . . # # # # #
+dnl NetBSD 4.0 . ? ? ? ? ? . . ? ? ? ? . . . ? ?
+dnl NetBSD 3.0 . . . . # # . # # # . # . . . . .
+dnl BeOS # # . # # # . # . . # ? . . . . .
+dnl mingw # # # # # # . # # # # ? . # # # .
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