-# printf.m4 serial 9
-dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc.
+# printf.m4 serial 34
+dnl Copyright (C) 2003, 2007-2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether printf supports size specifiers as in C99],
- [gl_cv_func_printf_sizes_c99],
+ [gl_cv_func_printf_sizes_c99],
[
AC_TRY_RUN([
#include <stddef.h>
])
])
+dnl Test whether the *printf family of functions supports 'long double'
+dnl arguments together with the 'L' size specifier. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_long_double.
+
+AC_DEFUN([gl_PRINTF_LONG_DOUBLE],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether printf supports 'long double' arguments],
+ [gl_cv_func_printf_long_double],
+ [
+ AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[10000];
+int main ()
+{
+ buf[0] = '\0';
+ if (sprintf (buf, "%Lf %d", 1.75L, 33, 44, 55) < 0
+ || strcmp (buf, "1.750000 33") != 0)
+ return 1;
+ buf[0] = '\0';
+ if (sprintf (buf, "%Le %d", 1.75L, 33, 44, 55) < 0
+ || strcmp (buf, "1.750000e+00 33") != 0)
+ return 1;
+ buf[0] = '\0';
+ if (sprintf (buf, "%Lg %d", 1.75L, 33, 44, 55) < 0
+ || strcmp (buf, "1.75 33") != 0)
+ return 1;
+ return 0;
+}], [gl_cv_func_printf_long_double=yes], [gl_cv_func_printf_long_double=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ beos*) gl_cv_func_printf_long_double="guessing no";;
+ mingw* | pw*) gl_cv_func_printf_long_double="guessing no";;
+ *) gl_cv_func_printf_long_double="guessing yes";;
+ esac
+changequote([,])dnl
+ ])
+ ])
+])
+
+dnl Test whether the *printf family of functions supports infinite and NaN
+dnl 'double' arguments and negative zero arguments in the %f, %e, %g
+dnl directives. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_infinite.
+
+AC_DEFUN([gl_PRINTF_INFINITE],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether printf supports infinite 'double' arguments],
+ [gl_cv_func_printf_infinite],
+ [
+ AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static int
+strisnan (const char *string, size_t start_index, size_t end_index)
+{
+ if (start_index < end_index)
+ {
+ if (string[start_index] == '-')
+ start_index++;
+ if (start_index + 3 <= end_index
+ && memcmp (string + start_index, "nan", 3) == 0)
+ {
+ start_index += 3;
+ if (start_index == end_index
+ || (string[start_index] == '(' && string[end_index - 1] == ')'))
+ return 1;
+ }
+ }
+ return 0;
+}
+static int
+have_minus_zero ()
+{
+ static double plus_zero = 0.0;
+ double minus_zero = - plus_zero;
+ return memcmp (&plus_zero, &minus_zero, sizeof (double)) != 0;
+}
+static char buf[10000];
+static double zero = 0.0;
+int main ()
+{
+ if (sprintf (buf, "%f", 1.0 / 0.0) < 0
+ || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%f", -1.0 / 0.0) < 0
+ || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%f", zero / zero) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%e", 1.0 / 0.0) < 0
+ || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%e", -1.0 / 0.0) < 0
+ || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%e", zero / zero) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%g", 1.0 / 0.0) < 0
+ || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%g", -1.0 / 0.0) < 0
+ || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%g", zero / zero) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ /* This test fails on HP-UX 10.20. */
+ if (have_minus_zero ())
+ if (sprintf (buf, "%g", - zero) < 0
+ || strcmp (buf, "-0") != 0)
+ return 1;
+ return 0;
+}], [gl_cv_func_printf_infinite=yes], [gl_cv_func_printf_infinite=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_printf_infinite="guessing yes";;
+ # Guess yes on FreeBSD >= 6.
+ freebsd[1-5]*) gl_cv_func_printf_infinite="guessing no";;
+ freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";;
+ # Guess yes on MacOS X >= 10.3.
+ darwin[1-6].*) gl_cv_func_printf_infinite="guessing no";;
+ darwin*) gl_cv_func_printf_infinite="guessing yes";;
+ # Guess yes on HP-UX >= 11.
+ hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite="guessing no";;
+ hpux*) gl_cv_func_printf_infinite="guessing yes";;
+ # Guess yes on NetBSD >= 3.
+ netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+ gl_cv_func_printf_infinite="guessing no";;
+ netbsd*) gl_cv_func_printf_infinite="guessing yes";;
+ # Guess yes on BeOS.
+ beos*) gl_cv_func_printf_infinite="guessing yes";;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_printf_infinite="guessing no";;
+ esac
+changequote([,])dnl
+ ])
+ ])
+])
+
+dnl Test whether the *printf family of functions supports infinite and NaN
+dnl 'long double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_infinite_long_double.
+
+AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE],
+[
+ AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([gl_BIGENDIAN])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ dnl The user can set or unset the variable gl_printf_safe to indicate
+ dnl that he wishes a safe handling of non-IEEE-754 'long double' values.
+ if test -n "$gl_printf_safe"; then
+ AC_DEFINE([CHECK_PRINTF_SAFE], [1],
+ [Define if you wish *printf() functions that have a safe handling of
+ non-IEEE-754 'long double' values.])
+ fi
+ case "$gl_cv_func_printf_long_double" in
+ *yes)
+ AC_CACHE_CHECK([whether printf supports infinite 'long double' arguments],
+ [gl_cv_func_printf_infinite_long_double],
+ [
+ AC_TRY_RUN([
+]GL_NOCRASH[
+#include <float.h>
+#include <stdio.h>
+#include <string.h>
+static int
+strisnan (const char *string, size_t start_index, size_t end_index)
+{
+ if (start_index < end_index)
+ {
+ if (string[start_index] == '-')
+ start_index++;
+ if (start_index + 3 <= end_index
+ && memcmp (string + start_index, "nan", 3) == 0)
+ {
+ start_index += 3;
+ if (start_index == end_index
+ || (string[start_index] == '(' && string[end_index - 1] == ')'))
+ return 1;
+ }
+ }
+ return 0;
+}
+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;
+ if (sprintf (buf, "%Lf", -1.0L / 0.0L) < 0
+ || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%Lf", zeroL / zeroL) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Le", 1.0L / 0.0L) < 0
+ || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%Le", -1.0L / 0.0L) < 0
+ || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%Le", zeroL / zeroL) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Lg", 1.0L / 0.0L) < 0
+ || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%Lg", -1.0L / 0.0L) < 0
+ || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
+ return 1;
+ if (sprintf (buf, "%Lg", zeroL / zeroL) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+/* Representation of an 80-bit 'long double' as an initializer for a sequence
+ of 'unsigned int' words. */
+# ifdef WORDS_BIGENDIAN
+# define LDBL80_WORDS(exponent,manthi,mantlo) \
+ { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
+ ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \
+ (unsigned int) (mantlo) << 16 \
+ }
+# else
+# define LDBL80_WORDS(exponent,manthi,mantlo) \
+ { mantlo, manthi, exponent }
+# endif
+ { /* Quiet NaN. */
+ static union { unsigned int word[4]; long double value; } x =
+ { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
+ if (sprintf (buf, "%Lf", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Le", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Lg", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ }
+ {
+ /* Signalling NaN. */
+ static union { unsigned int word[4]; long double value; } x =
+ { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
+ if (sprintf (buf, "%Lf", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Le", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Lg", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ }
+ { /* Pseudo-NaN. */
+ static union { unsigned int word[4]; long double value; } x =
+ { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
+ if (sprintf (buf, "%Lf", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Le", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Lg", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ }
+ { /* Pseudo-Infinity. */
+ static union { unsigned int word[4]; long double value; } x =
+ { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
+ if (sprintf (buf, "%Lf", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Le", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Lg", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ }
+ { /* Pseudo-Zero. */
+ static union { unsigned int word[4]; long double value; } x =
+ { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
+ if (sprintf (buf, "%Lf", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Le", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Lg", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ }
+ { /* Unnormalized number. */
+ static union { unsigned int word[4]; long double value; } x =
+ { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+ if (sprintf (buf, "%Lf", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Le", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Lg", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ }
+ { /* Pseudo-Denormal. */
+ static union { unsigned int word[4]; long double value; } x =
+ { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+ if (sprintf (buf, "%Lf", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Le", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ if (sprintf (buf, "%Lg", x.value) < 0
+ || !strisnan (buf, 0, strlen (buf)))
+ return 1;
+ }
+#endif
+ return 0;
+}],
+ [gl_cv_func_printf_infinite_long_double=yes],
+ [gl_cv_func_printf_infinite_long_double=no],
+ [
+changequote(,)dnl
+ case "$host_cpu" in
+ # Guess no on ia64, x86_64, i386.
+ ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";;
+ *)
+ case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_printf_infinite_long_double="guessing yes";;
+ # Guess yes on FreeBSD >= 6.
+ freebsd[1-5]*) gl_cv_func_printf_infinite_long_double="guessing no";;
+ freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
+ # Guess yes on MacOS X >= 10.3.
+ darwin[1-6].*) gl_cv_func_printf_infinite_long_double="guessing no";;
+ darwin*) gl_cv_func_printf_infinite_long_double="guessing yes";;
+ # Guess yes on HP-UX >= 11.
+ hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";;
+ hpux*) gl_cv_func_printf_infinite_long_double="guessing yes";;
+ # Guess yes on NetBSD >= 3.
+ netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+ gl_cv_func_printf_infinite_long_double="guessing no";;
+ netbsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_printf_infinite_long_double="guessing no";;
+ esac
+ ;;
+ esac
+changequote([,])dnl
+ ])
+ ])
+ ;;
+ *)
+ gl_cv_func_printf_infinite_long_double="irrelevant"
+ ;;
+ esac
+])
+
dnl Test whether the *printf family of functions supports the 'a' and 'A'
dnl conversion specifier for hexadecimal output of floating-point numbers.
dnl (ISO C99, POSIX:2001)
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether printf supports the 'a' and 'A' directives],
- [gl_cv_func_printf_directive_a],
+ [gl_cv_func_printf_directive_a],
[
AC_TRY_RUN([
#include <stdio.h>
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether printf supports the 'F' directive],
- [gl_cv_func_printf_directive_f],
+ [gl_cv_func_printf_directive_f],
[
AC_TRY_RUN([
#include <stdio.h>
if (sprintf (buf, "%F", 1.0 / 0.0) < 0
|| (strcmp (buf, "INF") != 0 && strcmp (buf, "INFINITY") != 0))
return 1;
- /* This catches a Cygwin 2007 bug. */
+ /* This catches a Cygwin 1.5.x bug. */
if (sprintf (buf, "%.F", 1234.0) < 0
|| strcmp (buf, "1234") != 0)
return 1;
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether printf supports the 'n' directive],
- [gl_cv_func_printf_directive_n],
+ [gl_cv_func_printf_directive_n],
[
AC_TRY_RUN([
#include <stdio.h>
#include <string.h>
+static char fmtstring[10];
static char buf[100];
int main ()
{
int count = -1;
- if (sprintf (buf, "%d %n", 123, &count, 33, 44, 55) < 0
+ /* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2)
+ support %n in format strings in read-only memory but not in writable
+ memory. */
+ strcpy (fmtstring, "%d %n");
+ if (sprintf (buf, fmtstring, 123, &count, 33, 44, 55) < 0
|| strcmp (buf, "123 ") != 0
|| count != 4)
return 1;
])
])
+dnl Test whether the *printf family of functions supports the %ls format
+dnl directive and in particular, when a precision is specified, whether
+dnl the functions stop converting the wide string argument when the number
+dnl of bytes that have been produced by this conversion equals or exceeds
+dnl the precision.
+dnl Result is gl_cv_func_printf_directive_ls.
+
+AC_DEFUN([gl_PRINTF_DIRECTIVE_LS],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether printf supports the 'ls' directive],
+ [gl_cv_func_printf_directive_ls],
+ [
+ AC_TRY_RUN([
+/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+ <wchar.h>.
+ BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
+ included before <wchar.h>. */
+#include <stddef.h>
+#include <stdio.h>
+#include <time.h>
+#include <wchar.h>
+#include <string.h>
+int main ()
+{
+ char buf[100];
+ /* Test whether %ls works at all.
+ This test fails on OpenBSD 4.0, IRIX 6.5, Solaris 2.6, Haiku, but not on
+ Cygwin 1.5. */
+ {
+ static const wchar_t wstring[] = { 'a', 'b', 'c', 0 };
+ buf[0] = '\0';
+ if (sprintf (buf, "%ls", wstring) < 0
+ || strcmp (buf, "abc") != 0)
+ return 1;
+ }
+ /* This test fails on IRIX 6.5, Solaris 2.6, Cygwin 1.5, Haiku (with an
+ assertion failure inside libc), but not on OpenBSD 4.0. */
+ {
+ static const wchar_t wstring[] = { 'a', 0 };
+ buf[0] = '\0';
+ if (sprintf (buf, "%ls", wstring) < 0
+ || strcmp (buf, "a") != 0)
+ return 1;
+ }
+ /* Test whether precisions in %ls are supported as specified in ISO C 99
+ section 7.19.6.1:
+ "If a precision is specified, no more than that many bytes are written
+ (including shift sequences, if any), and the array shall contain a
+ null wide character if, to equal the multibyte character sequence
+ length given by the precision, the function would need to access a
+ wide character one past the end of the array."
+ This test fails on Solaris 10. */
+ {
+ static const wchar_t wstring[] = { 'a', 'b', (wchar_t) 0xfdfdfdfd, 0 };
+ buf[0] = '\0';
+ if (sprintf (buf, "%.2ls", wstring) < 0
+ || strcmp (buf, "ab") != 0)
+ return 1;
+ }
+ return 0;
+}], [gl_cv_func_printf_directive_ls=yes], [gl_cv_func_printf_directive_ls=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ openbsd*) gl_cv_func_printf_directive_ls="guessing no";;
+ irix*) gl_cv_func_printf_directive_ls="guessing no";;
+ solaris*) gl_cv_func_printf_directive_ls="guessing no";;
+ cygwin*) gl_cv_func_printf_directive_ls="guessing no";;
+ beos* | haiku*) gl_cv_func_printf_directive_ls="guessing no";;
+ *) gl_cv_func_printf_directive_ls="guessing yes";;
+ esac
+changequote([,])dnl
+ ])
+ ])
+])
+
dnl Test whether the *printf family of functions supports POSIX/XSI format
dnl strings with positions. (POSIX:2001)
dnl Result is gl_cv_func_printf_positions.
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether printf supports POSIX/XSI format strings with positions],
- [gl_cv_func_printf_positions],
+ [gl_cv_func_printf_positions],
[
AC_TRY_RUN([
#include <stdio.h>
[
changequote(,)dnl
case "$host_os" in
+ cygwin*) gl_cv_func_printf_flag_grouping="guessing no";;
netbsd*) gl_cv_func_printf_flag_grouping="guessing no";;
mingw* | pw*) gl_cv_func_printf_flag_grouping="guessing no";;
*) gl_cv_func_printf_flag_grouping="guessing yes";;
])
])
+dnl Test whether the *printf family of functions supports the - flag correctly.
+dnl (ISO C99.) See
+dnl <http://lists.gnu.org/archive/html/bug-coreutils/2008-02/msg00035.html>
+dnl Result is gl_cv_func_printf_flag_leftadjust.
+
+AC_DEFUN([gl_PRINTF_FLAG_LEFTADJUST],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether printf supports the left-adjust flag correctly],
+ [gl_cv_func_printf_flag_leftadjust],
+ [
+ AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+ /* Check that a '-' flag is not annihilated by a negative width. */
+ if (sprintf (buf, "a%-*sc", -3, "b") < 0
+ || strcmp (buf, "ab c") != 0)
+ return 1;
+ return 0;
+}],
+ [gl_cv_func_printf_flag_leftadjust=yes],
+ [gl_cv_func_printf_flag_leftadjust=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ # Guess yes on HP-UX 11.
+ hpux11*) gl_cv_func_printf_flag_leftadjust="guessing yes";;
+ # Guess no on HP-UX 10 and older.
+ hpux*) gl_cv_func_printf_flag_leftadjust="guessing no";;
+ # Guess yes otherwise.
+ *) gl_cv_func_printf_flag_leftadjust="guessing yes";;
+ esac
+changequote([,])dnl
+ ])
+ ])
+])
+
dnl Test whether the *printf family of functions supports padding of non-finite
dnl values with the 0 flag correctly. (ISO C99 + TC1 + TC2.) See
dnl <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html>
])
])
+dnl Test whether the *printf family of functions supports large precisions.
+dnl On mingw, precisions larger than 512 are treated like 512, in integer,
+dnl floating-point or pointer output. On BeOS, precisions larger than 1044
+dnl crash the program.
+dnl Result is gl_cv_func_printf_precision.
+
+AC_DEFUN([gl_PRINTF_PRECISION],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether printf supports large precisions],
+ [gl_cv_func_printf_precision],
+ [
+ AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[5000];
+int main ()
+{
+#ifdef __BEOS__
+ /* On BeOS, this would crash and show a dialog box. Avoid the crash. */
+ return 1;
+#endif
+ if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3)
+ return 1;
+ return 0;
+}], [gl_cv_func_printf_precision=yes], [gl_cv_func_printf_precision=no],
+ [
+changequote(,)dnl
+ case "$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.
+
+AC_DEFUN([gl_PRINTF_ENOMEM],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([gl_MULTIARCH])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether printf survives out-of-memory conditions],
+ [gl_cv_func_printf_enomem],
+ [
+ gl_cv_func_printf_enomem="guessing no"
+ if test "$cross_compiling" = no; then
+ if test $APPLE_UNIVERSAL_BUILD = 0; then
+ AC_LANG_CONFTEST([AC_LANG_SOURCE([
+]GL_NOCRASH[
+changequote(,)dnl
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <errno.h>
+int main()
+{
+ struct rlimit limit;
+ int ret;
+ nocrash_init ();
+ /* Some printf implementations allocate temporary space with malloc. */
+ /* On BSD systems, malloc() is limited by RLIMIT_DATA. */
+#ifdef RLIMIT_DATA
+ if (getrlimit (RLIMIT_DATA, &limit) < 0)
+ return 77;
+ if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
+ limit.rlim_max = 5000000;
+ limit.rlim_cur = limit.rlim_max;
+ if (setrlimit (RLIMIT_DATA, &limit) < 0)
+ return 77;
+#endif
+ /* On Linux systems, malloc() is limited by RLIMIT_AS. */
+#ifdef RLIMIT_AS
+ if (getrlimit (RLIMIT_AS, &limit) < 0)
+ return 77;
+ if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
+ limit.rlim_max = 5000000;
+ limit.rlim_cur = limit.rlim_max;
+ if (setrlimit (RLIMIT_AS, &limit) < 0)
+ return 77;
+#endif
+ /* Some printf implementations allocate temporary space on the stack. */
+#ifdef RLIMIT_STACK
+ if (getrlimit (RLIMIT_STACK, &limit) < 0)
+ return 77;
+ if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
+ limit.rlim_max = 5000000;
+ limit.rlim_cur = limit.rlim_max;
+ if (setrlimit (RLIMIT_STACK, &limit) < 0)
+ return 77;
+#endif
+ ret = printf ("%.5000000f", 1.0);
+ return !(ret == 5000002 || (ret < 0 && errno == ENOMEM));
+}
+changequote([,])dnl
+ ])])
+ if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
+ (./conftest
+ result=$?
+ if test $result != 0 && test $result != 77; then result=1; fi
+ exit $result
+ ) >/dev/null 2>/dev/null
+ case $? in
+ 0) gl_cv_func_printf_enomem="yes" ;;
+ 77) gl_cv_func_printf_enomem="guessing no" ;;
+ *) gl_cv_func_printf_enomem="no" ;;
+ esac
+ else
+ gl_cv_func_printf_enomem="guessing no"
+ fi
+ rm -fr conftest*
+ else
+ dnl A universal build on Apple MacOS X platforms.
+ dnl The result would be 'no' in 32-bit mode and 'yes' in 64-bit mode.
+ dnl But we need a configuration result that is valid in both modes.
+ gl_cv_func_printf_enomem="guessing no"
+ fi
+ fi
+ if test "$gl_cv_func_printf_enomem" = "guessing no"; then
+changequote(,)dnl
+ case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_printf_enomem="guessing yes";;
+ # Guess yes on Solaris.
+ solaris*) gl_cv_func_printf_enomem="guessing yes";;
+ # Guess yes on AIX.
+ aix*) gl_cv_func_printf_enomem="guessing yes";;
+ # Guess yes on HP-UX/hppa.
+ hpux*) case "$host_cpu" in
+ hppa*) gl_cv_func_printf_enomem="guessing yes";;
+ *) gl_cv_func_printf_enomem="guessing no";;
+ esac
+ ;;
+ # Guess yes on IRIX.
+ irix*) gl_cv_func_printf_enomem="guessing yes";;
+ # Guess yes on OSF/1.
+ osf*) gl_cv_func_printf_enomem="guessing yes";;
+ # Guess yes on BeOS.
+ beos*) gl_cv_func_printf_enomem="guessing yes";;
+ # Guess yes on Haiku.
+ haiku*) gl_cv_func_printf_enomem="guessing yes";;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_printf_enomem="guessing no";;
+ esac
+changequote([,])dnl
+ fi
+ ])
+])
+
dnl Test whether the snprintf function exists. (ISO C99, POSIX:2001)
dnl Result is ac_cv_func_snprintf.
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether snprintf truncates the result as in C99],
- [gl_cv_func_snprintf_truncation_c99],
+ [gl_cv_func_snprintf_truncation_c99],
[
AC_TRY_RUN([
#include <stdio.h>
dnl ---------------------------------------------------------------------
dnl Result is gl_cv_func_snprintf_retval_c99.
-AC_DEFUN([gl_SNPRINTF_RETVAL_C99],
+AC_DEFUN_ONCE([gl_SNPRINTF_RETVAL_C99],
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether snprintf returns a byte count as in C99],
- [gl_cv_func_snprintf_retval_c99],
+ [gl_cv_func_snprintf_retval_c99],
[
AC_TRY_RUN([
#include <stdio.h>
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether snprintf fully supports the 'n' directive],
- [gl_cv_func_snprintf_directive_n],
+ [gl_cv_func_snprintf_directive_n],
[
AC_TRY_RUN([
#include <stdio.h>
#include <string.h>
+static char fmtstring[10];
static char buf[100];
int main ()
{
int count = -1;
- snprintf (buf, 4, "%d %n", 12345, &count, 33, 44, 55);
+ /* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2)
+ support %n in format strings in read-only memory but not in writable
+ memory. */
+ strcpy (fmtstring, "%d %n");
+ snprintf (buf, 4, fmtstring, 12345, &count, 33, 44, 55);
if (count != 6)
return 1;
return 0;
])
])
+dnl Test whether the snprintf function, when passed a size = 1, writes any
+dnl output without bounds in this case, behaving like sprintf. This is the
+dnl case on Linux libc5.
+dnl Result is gl_cv_func_snprintf_size1.
+
+AC_DEFUN([gl_SNPRINTF_SIZE1],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_CACHE_CHECK([whether snprintf respects a size of 1],
+ [gl_cv_func_snprintf_size1],
+ [
+ AC_TRY_RUN([
+#include <stdio.h>
+int main()
+{
+ static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
+ snprintf (buf, 1, "%d", 12345);
+ return buf[1] != 'E';
+}],
+ [gl_cv_func_snprintf_size1=yes],
+ [gl_cv_func_snprintf_size1=no],
+ [gl_cv_func_snprintf_size1="guessing yes"])
+ ])
+])
+
dnl Test whether the vsnprintf function, when passed a zero size, produces no
dnl output. (ISO C99, POSIX:2001)
dnl For example, snprintf nevertheless writes a NUL byte in this case
dnl #include <stdio.h>
dnl int main()
dnl {
-dnl static char buf[8] = "DEADBEEF";
+dnl static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
dnl snprintf (buf, 0, "%d", 12345);
dnl return buf[0] != 'D';
dnl }
dnl }
dnl int main()
dnl {
-dnl static char buf[8] = "DEADBEEF";
+dnl static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
dnl my_snprintf (buf, 0, "%d", 12345);
dnl return buf[0] != 'D';
dnl }
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether vsnprintf respects a zero size as in C99],
- [gl_cv_func_vsnprintf_zerosize_c99],
+ [gl_cv_func_vsnprintf_zerosize_c99],
[
AC_TRY_RUN([
#include <stdarg.h>
}
int main()
{
- static char buf[8] = "DEADBEEF";
+ static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
my_snprintf (buf, 0, "%d", 12345);
return buf[0] != 'D';
}],
# Guess yes on MacOS X >= 10.3.
darwin[1-6].*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
darwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # Guess yes on Cygwin.
+ cygwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
# Guess yes on Solaris >= 2.6.
solaris2.[0-5]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
solaris*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
dnl The results of these tests on various platforms are:
dnl
dnl 1 = gl_PRINTF_SIZES_C99
-dnl 2 = gl_PRINTF_DIRECTIVE_A
-dnl 3 = gl_PRINTF_DIRECTIVE_F
-dnl 4 = gl_PRINTF_DIRECTIVE_N
-dnl 5 = gl_PRINTF_POSITIONS
-dnl 6 = gl_PRINTF_FLAG_GROUPING
-dnl 7 = gl_PRINTF_FLAG_ZERO
-dnl 8 = gl_SNPRINTF_PRESENCE
-dnl 9 = gl_SNPRINTF_TRUNCATION_C99
-dnl 10 = gl_SNPRINTF_RETVAL_C99
-dnl 11 = gl_SNPRINTF_DIRECTIVE_N
-dnl 12 = gl_VSNPRINTF_ZEROSIZE_C99
+dnl 2 = gl_PRINTF_LONG_DOUBLE
+dnl 3 = gl_PRINTF_INFINITE
+dnl 4 = gl_PRINTF_INFINITE_LONG_DOUBLE
+dnl 5 = gl_PRINTF_DIRECTIVE_A
+dnl 6 = gl_PRINTF_DIRECTIVE_F
+dnl 7 = gl_PRINTF_DIRECTIVE_N
+dnl 8 = gl_PRINTF_DIRECTIVE_LS
+dnl 9 = gl_PRINTF_POSITIONS
+dnl 10 = gl_PRINTF_FLAG_GROUPING
+dnl 11 = gl_PRINTF_FLAG_LEFTADJUST
+dnl 12 = gl_PRINTF_FLAG_ZERO
+dnl 13 = gl_PRINTF_PRECISION
+dnl 14 = gl_PRINTF_ENOMEM
+dnl 15 = gl_SNPRINTF_PRESENCE
+dnl 16 = gl_SNPRINTF_TRUNCATION_C99
+dnl 17 = gl_SNPRINTF_RETVAL_C99
+dnl 18 = gl_SNPRINTF_DIRECTIVE_N
+dnl 19 = gl_SNPRINTF_SIZE1
+dnl 20 = gl_VSNPRINTF_ZEROSIZE_C99
dnl
dnl 1 = checking whether printf supports size specifiers as in C99...
-dnl 2 = checking whether printf supports the 'a' and 'A' directives...
-dnl 3 = checking whether printf supports the 'F' directive...
-dnl 4 = checking whether printf supports the 'n' directive...
-dnl 5 = checking whether printf supports POSIX/XSI format strings with positions...
-dnl 6 = checking whether printf supports the grouping flag...
-dnl 7 = checking whether printf supports the zero flag correctly...
-dnl 8 = checking for snprintf...
-dnl 9 = checking whether snprintf truncates the result as in C99...
-dnl 10 = checking whether snprintf returns a byte count as in C99...
-dnl 11 = checking whether snprintf fully supports the 'n' directive...
-dnl 12 = checking whether vsnprintf respects a zero size as in C99...
+dnl 2 = checking whether printf supports 'long double' arguments...
+dnl 3 = checking whether printf supports infinite 'double' arguments...
+dnl 4 = checking whether printf supports infinite 'long double' arguments...
+dnl 5 = checking whether printf supports the 'a' and 'A' directives...
+dnl 6 = checking whether printf supports the 'F' directive...
+dnl 7 = checking whether printf supports the 'n' directive...
+dnl 8 = checking whether printf supports the 'ls' directive...
+dnl 9 = checking whether printf supports POSIX/XSI format strings with positions...
+dnl 10 = checking whether printf supports the grouping flag...
+dnl 11 = checking whether printf supports the left-adjust flag correctly...
+dnl 12 = checking whether printf supports the zero flag correctly...
+dnl 13 = checking whether printf supports large precisions...
+dnl 14 = checking whether printf survives out-of-memory conditions...
+dnl 15 = checking for snprintf...
+dnl 16 = checking whether snprintf truncates the result as in C99...
+dnl 17 = checking whether snprintf returns a byte count as in C99...
+dnl 18 = checking whether snprintf fully supports the 'n' directive...
+dnl 19 = checking whether snprintf respects a size of 1...
+dnl 20 = 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
-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 . # # . . ? ? . . . . ?
-dnl Cygwin 2006 # # # . . ? ? . . . . ?
-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, 11.11, 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 18 19 20
+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 1.7.0 (2009) . . . # . . . ? . . . . . ? . . . . . .
+dnl Cygwin 1.5.25 (2008) . . . # # . . # . . . . . # . . . . . .
+dnl Cygwin 1.5.19 (2006) # . . # # # . # . # . # # # . . . . . .
+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 11.{00,11,23} # . . . # # . . . . . # . . . . # # . #
+dnl HP-UX 10.20 # . # . # # . ? . . # # . . . . # # ? #
+dnl IRIX 6.5 # . # # # # . # . . . # . . . . # . . .
+dnl OSF/1 5.1 # . # # # # . . . . . # . . . . # . . #
+dnl OSF/1 4.0d # . # # # # . . . . . # . . # # # # # #
+dnl NetBSD 4.0 . ? ? ? ? ? . ? . ? ? ? ? ? . . . ? ? ?
+dnl NetBSD 3.0 . . . . # # . ? # # ? # . # . . . . . .
+dnl Haiku . . . # # # . # . . . . . ? . . . . . .
+dnl BeOS # # . # # # . ? # . ? . # ? . . . . . .
+dnl mingw # # # # # # . . # # . # # ? . # # # . .
projects / gnulib.git / blobdiff