2 dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl Test whether the *printf family of functions supports the 'j', 'z', 't',
8 dnl 'L' size specifiers. (ISO C99, POSIX:2001)
9 dnl Result is gl_cv_func_printf_sizes_c99.
11 AC_DEFUN([gl_PRINTF_SIZES_C99],
13 AC_REQUIRE([AC_PROG_CC])
14 AC_REQUIRE([gl_AC_HEADER_STDINT_H])
15 AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
16 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
17 AC_CACHE_CHECK([whether printf supports size specifiers as in C99],
18 [gl_cv_func_printf_sizes_c99],
24 #include <sys/types.h>
25 #if HAVE_STDINT_H_WITH_UINTMAX
28 #if HAVE_INTTYPES_H_WITH_UINTMAX
29 # include <inttypes.h>
34 #if HAVE_STDINT_H_WITH_UINTMAX || HAVE_INTTYPES_H_WITH_UINTMAX
36 if (sprintf (buf, "%ju %d", (uintmax_t) 12345671, 33, 44, 55) < 0
37 || strcmp (buf, "12345671 33") != 0)
41 if (sprintf (buf, "%zu %d", (size_t) 12345672, 33, 44, 55) < 0
42 || strcmp (buf, "12345672 33") != 0)
45 if (sprintf (buf, "%tu %d", (ptrdiff_t) 12345673, 33, 44, 55) < 0
46 || strcmp (buf, "12345673 33") != 0)
49 if (sprintf (buf, "%Lg %d", (long double) 1.5, 33, 44, 55) < 0
50 || strcmp (buf, "1.5 33") != 0)
53 }], [gl_cv_func_printf_sizes_c99=yes], [gl_cv_func_printf_sizes_c99=no],
57 # Guess yes on glibc systems.
58 *-gnu*) gl_cv_func_printf_sizes_c99="guessing yes";;
59 # Guess yes on FreeBSD >= 5.
60 freebsd[1-4]*) gl_cv_func_printf_sizes_c99="guessing no";;
61 freebsd* | kfreebsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
62 # Guess yes on MacOS X >= 10.3.
63 darwin[1-6].*) gl_cv_func_printf_sizes_c99="guessing no";;
64 darwin*) gl_cv_func_printf_sizes_c99="guessing yes";;
65 # Guess yes on OpenBSD >= 3.9.
66 openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
67 gl_cv_func_printf_sizes_c99="guessing no";;
68 openbsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
69 # Guess yes on Solaris >= 2.10.
70 solaris2.[0-9]*) gl_cv_func_printf_sizes_c99="guessing no";;
71 solaris*) gl_cv_func_printf_sizes_c99="guessing yes";;
72 # Guess yes on NetBSD >= 3.
73 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
74 gl_cv_func_printf_sizes_c99="guessing no";;
75 netbsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
76 # If we don't know, assume the worst.
77 *) gl_cv_func_printf_sizes_c99="guessing no";;
84 dnl Test whether the *printf family of functions supports 'long double'
85 dnl arguments together with the 'L' size specifier. (ISO C99, POSIX:2001)
86 dnl Result is gl_cv_func_printf_long_double.
88 AC_DEFUN([gl_PRINTF_LONG_DOUBLE],
90 AC_REQUIRE([AC_PROG_CC])
91 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
92 AC_CACHE_CHECK([whether printf supports 'long double' arguments],
93 [gl_cv_func_printf_long_double],
98 static char buf[10000];
102 if (sprintf (buf, "%Lf %d", 1.75L, 33, 44, 55) < 0
103 || strcmp (buf, "1.750000 33") != 0)
106 if (sprintf (buf, "%Le %d", 1.75L, 33, 44, 55) < 0
107 || strcmp (buf, "1.750000e+00 33") != 0)
110 if (sprintf (buf, "%Lg %d", 1.75L, 33, 44, 55) < 0
111 || strcmp (buf, "1.75 33") != 0)
114 }], [gl_cv_func_printf_long_double=yes], [gl_cv_func_printf_long_double=no],
118 beos*) gl_cv_func_printf_long_double="guessing no";;
119 mingw* | pw*) gl_cv_func_printf_long_double="guessing no";;
120 *) gl_cv_func_printf_long_double="guessing yes";;
127 dnl Test whether the *printf family of functions supports infinite and NaN
128 dnl 'double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001)
129 dnl Result is gl_cv_func_printf_infinite.
131 AC_DEFUN([gl_PRINTF_INFINITE],
133 AC_REQUIRE([AC_PROG_CC])
134 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
135 AC_CACHE_CHECK([whether printf supports infinite 'double' arguments],
136 [gl_cv_func_printf_infinite],
142 strisnan (const char *string, size_t start_index, size_t end_index)
144 if (start_index < end_index)
146 if (string[start_index] == '-')
148 if (start_index + 3 <= end_index
149 && memcmp (string + start_index, "nan", 3) == 0)
152 if (start_index == end_index
153 || (string[start_index] == '(' && string[end_index - 1] == ')'))
159 static char buf[10000];
160 static double zero = 0.0;
163 if (sprintf (buf, "%f", 1.0 / 0.0) < 0
164 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
166 if (sprintf (buf, "%f", -1.0 / 0.0) < 0
167 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
169 if (sprintf (buf, "%f", zero / zero) < 0
170 || !strisnan (buf, 0, strlen (buf)))
172 if (sprintf (buf, "%e", 1.0 / 0.0) < 0
173 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
175 if (sprintf (buf, "%e", -1.0 / 0.0) < 0
176 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
178 if (sprintf (buf, "%e", zero / zero) < 0
179 || !strisnan (buf, 0, strlen (buf)))
181 if (sprintf (buf, "%g", 1.0 / 0.0) < 0
182 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
184 if (sprintf (buf, "%g", -1.0 / 0.0) < 0
185 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
187 if (sprintf (buf, "%g", zero / zero) < 0
188 || !strisnan (buf, 0, strlen (buf)))
191 }], [gl_cv_func_printf_infinite=yes], [gl_cv_func_printf_infinite=no],
195 # Guess yes on glibc systems.
196 *-gnu*) gl_cv_func_printf_infinite="guessing yes";;
197 # Guess yes on FreeBSD >= 6.
198 freebsd[1-5]*) gl_cv_func_printf_infinite="guessing no";;
199 freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";;
200 # Guess yes on MacOS X >= 10.3.
201 darwin[1-6].*) gl_cv_func_printf_infinite="guessing no";;
202 darwin*) gl_cv_func_printf_infinite="guessing yes";;
203 # Guess yes on HP-UX >= 11.
204 hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite="guessing no";;
205 hpux*) gl_cv_func_printf_infinite="guessing yes";;
206 # Guess yes on NetBSD >= 3.
207 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
208 gl_cv_func_printf_infinite="guessing no";;
209 netbsd*) gl_cv_func_printf_infinite="guessing yes";;
211 beos*) gl_cv_func_printf_infinite="guessing yes";;
212 # If we don't know, assume the worst.
213 *) gl_cv_func_printf_infinite="guessing no";;
220 dnl Test whether the *printf family of functions supports infinite and NaN
221 dnl 'long double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001)
222 dnl Result is gl_cv_func_printf_infinite_long_double.
224 AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE],
226 AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
227 AC_REQUIRE([AC_PROG_CC])
228 AC_REQUIRE([AC_C_BIGENDIAN])
229 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
230 dnl The user can set or unset the variable gl_printf_safe to indicate
231 dnl that he wishes a safe handling of non-IEEE-754 'long double' values.
232 if test -n "$gl_printf_safe"; then
233 AC_DEFINE([CHECK_PRINTF_SAFE], 1,
234 [Define if you wish *printf() functions that have a safe handling of
235 non-IEEE-754 'long double' values.])
237 case "$gl_cv_func_printf_long_double" in
239 AC_CACHE_CHECK([whether printf supports infinite 'long double' arguments],
240 [gl_cv_func_printf_infinite_long_double],
247 strisnan (const char *string, size_t start_index, size_t end_index)
249 if (start_index < end_index)
251 if (string[start_index] == '-')
253 if (start_index + 3 <= end_index
254 && memcmp (string + start_index, "nan", 3) == 0)
257 if (start_index == end_index
258 || (string[start_index] == '(' && string[end_index - 1] == ')'))
264 static char buf[10000];
265 static long double zeroL = 0.0L;
268 if (sprintf (buf, "%Lf", 1.0L / 0.0L) < 0
269 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
271 if (sprintf (buf, "%Lf", -1.0L / 0.0L) < 0
272 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
274 if (sprintf (buf, "%Lf", zeroL / zeroL) < 0
275 || !strisnan (buf, 0, strlen (buf)))
277 if (sprintf (buf, "%Le", 1.0L / 0.0L) < 0
278 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
280 if (sprintf (buf, "%Le", -1.0L / 0.0L) < 0
281 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
283 if (sprintf (buf, "%Le", zeroL / zeroL) < 0
284 || !strisnan (buf, 0, strlen (buf)))
286 if (sprintf (buf, "%Lg", 1.0L / 0.0L) < 0
287 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
289 if (sprintf (buf, "%Lg", -1.0L / 0.0L) < 0
290 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
292 if (sprintf (buf, "%Lg", zeroL / zeroL) < 0
293 || !strisnan (buf, 0, strlen (buf)))
295 #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_))
296 /* Representation of an 80-bit 'long double' as an initializer for a sequence
297 of 'unsigned int' words. */
298 # ifdef WORDS_BIGENDIAN
299 # define LDBL80_WORDS(exponent,manthi,mantlo) \
300 { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
301 ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \
302 (unsigned int) (mantlo) << 16 \
305 # define LDBL80_WORDS(exponent,manthi,mantlo) \
306 { mantlo, manthi, exponent }
309 static union { unsigned int word[4]; long double value; } x =
310 { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
311 if (sprintf (buf, "%Lf", x.value) < 0
312 || !strisnan (buf, 0, strlen (buf)))
314 if (sprintf (buf, "%Le", x.value) < 0
315 || !strisnan (buf, 0, strlen (buf)))
317 if (sprintf (buf, "%Lg", x.value) < 0
318 || !strisnan (buf, 0, strlen (buf)))
322 /* Signalling NaN. */
323 static union { unsigned int word[4]; long double value; } x =
324 { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
325 if (sprintf (buf, "%Lf", x.value) < 0
326 || !strisnan (buf, 0, strlen (buf)))
328 if (sprintf (buf, "%Le", x.value) < 0
329 || !strisnan (buf, 0, strlen (buf)))
331 if (sprintf (buf, "%Lg", x.value) < 0
332 || !strisnan (buf, 0, strlen (buf)))
336 static union { unsigned int word[4]; long double value; } x =
337 { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
338 if (sprintf (buf, "%Lf", x.value) < 0
339 || !strisnan (buf, 0, strlen (buf)))
341 if (sprintf (buf, "%Le", x.value) < 0
342 || !strisnan (buf, 0, strlen (buf)))
344 if (sprintf (buf, "%Lg", x.value) < 0
345 || !strisnan (buf, 0, strlen (buf)))
348 { /* Pseudo-Infinity. */
349 static union { unsigned int word[4]; long double value; } x =
350 { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
351 if (sprintf (buf, "%Lf", x.value) < 0
352 || !strisnan (buf, 0, strlen (buf)))
354 if (sprintf (buf, "%Le", x.value) < 0
355 || !strisnan (buf, 0, strlen (buf)))
357 if (sprintf (buf, "%Lg", x.value) < 0
358 || !strisnan (buf, 0, strlen (buf)))
362 static union { unsigned int word[4]; long double value; } x =
363 { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
364 if (sprintf (buf, "%Lf", x.value) < 0
365 || !strisnan (buf, 0, strlen (buf)))
367 if (sprintf (buf, "%Le", x.value) < 0
368 || !strisnan (buf, 0, strlen (buf)))
370 if (sprintf (buf, "%Lg", x.value) < 0
371 || !strisnan (buf, 0, strlen (buf)))
374 { /* Unnormalized number. */
375 static union { unsigned int word[4]; long double value; } x =
376 { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
377 if (sprintf (buf, "%Lf", x.value) < 0
378 || !strisnan (buf, 0, strlen (buf)))
380 if (sprintf (buf, "%Le", x.value) < 0
381 || !strisnan (buf, 0, strlen (buf)))
383 if (sprintf (buf, "%Lg", x.value) < 0
384 || !strisnan (buf, 0, strlen (buf)))
387 { /* Pseudo-Denormal. */
388 static union { unsigned int word[4]; long double value; } x =
389 { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
390 if (sprintf (buf, "%Lf", x.value) < 0
391 || !strisnan (buf, 0, strlen (buf)))
393 if (sprintf (buf, "%Le", x.value) < 0
394 || !strisnan (buf, 0, strlen (buf)))
396 if (sprintf (buf, "%Lg", x.value) < 0
397 || !strisnan (buf, 0, strlen (buf)))
403 [gl_cv_func_printf_infinite_long_double=yes],
404 [gl_cv_func_printf_infinite_long_double=no],
408 # Guess no on ia64, x86_64, i386.
409 ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";;
412 # Guess yes on glibc systems.
413 *-gnu*) gl_cv_func_printf_infinite_long_double="guessing yes";;
414 # Guess yes on FreeBSD >= 6.
415 freebsd[1-5]*) gl_cv_func_printf_infinite_long_double="guessing no";;
416 freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
417 # Guess yes on MacOS X >= 10.3.
418 darwin[1-6].*) gl_cv_func_printf_infinite_long_double="guessing no";;
419 darwin*) gl_cv_func_printf_infinite_long_double="guessing yes";;
420 # Guess yes on HP-UX >= 11.
421 hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";;
422 hpux*) gl_cv_func_printf_infinite_long_double="guessing yes";;
423 # Guess yes on NetBSD >= 3.
424 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
425 gl_cv_func_printf_infinite_long_double="guessing no";;
426 netbsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
427 # If we don't know, assume the worst.
428 *) gl_cv_func_printf_infinite_long_double="guessing no";;
437 gl_cv_func_printf_infinite_long_double="irrelevant"
442 dnl Test whether the *printf family of functions supports the 'a' and 'A'
443 dnl conversion specifier for hexadecimal output of floating-point numbers.
444 dnl (ISO C99, POSIX:2001)
445 dnl Result is gl_cv_func_printf_directive_a.
447 AC_DEFUN([gl_PRINTF_DIRECTIVE_A],
449 AC_REQUIRE([AC_PROG_CC])
450 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
451 AC_CACHE_CHECK([whether printf supports the 'a' and 'A' directives],
452 [gl_cv_func_printf_directive_a],
457 static char buf[100];
460 if (sprintf (buf, "%a %d", 3.1416015625, 33, 44, 55) < 0
461 || (strcmp (buf, "0x1.922p+1 33") != 0
462 && strcmp (buf, "0x3.244p+0 33") != 0
463 && strcmp (buf, "0x6.488p-1 33") != 0
464 && strcmp (buf, "0xc.91p-2 33") != 0))
466 if (sprintf (buf, "%A %d", -3.1416015625, 33, 44, 55) < 0
467 || (strcmp (buf, "-0X1.922P+1 33") != 0
468 && strcmp (buf, "-0X3.244P+0 33") != 0
469 && strcmp (buf, "-0X6.488P-1 33") != 0
470 && strcmp (buf, "-0XC.91P-2 33") != 0))
472 /* This catches a FreeBSD 6.1 bug: it doesn't round. */
473 if (sprintf (buf, "%.2a %d", 1.51, 33, 44, 55) < 0
474 || (strcmp (buf, "0x1.83p+0 33") != 0
475 && strcmp (buf, "0x3.05p-1 33") != 0
476 && strcmp (buf, "0x6.0ap-2 33") != 0
477 && strcmp (buf, "0xc.14p-3 33") != 0))
479 /* This catches a FreeBSD 6.1 bug. See
480 <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
481 if (sprintf (buf, "%010a %d", 1.0 / 0.0, 33, 44, 55) < 0
484 /* This catches a MacOS X 10.3.9 (Darwin 7.9) bug. */
485 if (sprintf (buf, "%.1a", 1.999) < 0
486 || (strcmp (buf, "0x1.0p+1") != 0
487 && strcmp (buf, "0x2.0p+0") != 0
488 && strcmp (buf, "0x4.0p-1") != 0
489 && strcmp (buf, "0x8.0p-2") != 0))
491 /* This catches the same MacOS X 10.3.9 (Darwin 7.9) bug and also a
492 glibc 2.4 bug <http://sourceware.org/bugzilla/show_bug.cgi?id=2908>. */
493 if (sprintf (buf, "%.1La", 1.999L) < 0
494 || (strcmp (buf, "0x1.0p+1") != 0
495 && strcmp (buf, "0x2.0p+0") != 0
496 && strcmp (buf, "0x4.0p-1") != 0
497 && strcmp (buf, "0x8.0p-2") != 0))
500 }], [gl_cv_func_printf_directive_a=yes], [gl_cv_func_printf_directive_a=no],
503 # Guess yes on glibc >= 2.5 systems.
505 AC_EGREP_CPP([BZ2908], [
506 #include <features.h>
507 #ifdef __GNU_LIBRARY__
508 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 5) || (__GLIBC__ > 2)
513 [gl_cv_func_printf_directive_a="guessing yes"],
514 [gl_cv_func_printf_directive_a="guessing no"])
516 # If we don't know, assume the worst.
517 *) gl_cv_func_printf_directive_a="guessing no";;
523 dnl Test whether the *printf family of functions supports the %F format
524 dnl directive. (ISO C99, POSIX:2001)
525 dnl Result is gl_cv_func_printf_directive_f.
527 AC_DEFUN([gl_PRINTF_DIRECTIVE_F],
529 AC_REQUIRE([AC_PROG_CC])
530 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
531 AC_CACHE_CHECK([whether printf supports the 'F' directive],
532 [gl_cv_func_printf_directive_f],
537 static char buf[100];
540 if (sprintf (buf, "%F %d", 1234567.0, 33, 44, 55) < 0
541 || strcmp (buf, "1234567.000000 33") != 0)
543 if (sprintf (buf, "%F", 1.0 / 0.0) < 0
544 || (strcmp (buf, "INF") != 0 && strcmp (buf, "INFINITY") != 0))
546 /* This catches a Cygwin 2007 bug. */
547 if (sprintf (buf, "%.F", 1234.0) < 0
548 || strcmp (buf, "1234") != 0)
551 }], [gl_cv_func_printf_directive_f=yes], [gl_cv_func_printf_directive_f=no],
555 # Guess yes on glibc systems.
556 *-gnu*) gl_cv_func_printf_directive_f="guessing yes";;
557 # Guess yes on FreeBSD >= 6.
558 freebsd[1-5]*) gl_cv_func_printf_directive_f="guessing no";;
559 freebsd* | kfreebsd*) gl_cv_func_printf_directive_f="guessing yes";;
560 # Guess yes on MacOS X >= 10.3.
561 darwin[1-6].*) gl_cv_func_printf_directive_f="guessing no";;
562 darwin*) gl_cv_func_printf_directive_f="guessing yes";;
563 # Guess yes on Solaris >= 2.10.
564 solaris2.[0-9]*) gl_cv_func_printf_directive_f="guessing no";;
565 solaris*) gl_cv_func_printf_directive_f="guessing yes";;
566 # If we don't know, assume the worst.
567 *) gl_cv_func_printf_directive_f="guessing no";;
574 dnl Test whether the *printf family of functions supports the %n format
575 dnl directive. (ISO C99, POSIX:2001)
576 dnl Result is gl_cv_func_printf_directive_n.
578 AC_DEFUN([gl_PRINTF_DIRECTIVE_N],
580 AC_REQUIRE([AC_PROG_CC])
581 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
582 AC_CACHE_CHECK([whether printf supports the 'n' directive],
583 [gl_cv_func_printf_directive_n],
588 static char fmtstring[10];
589 static char buf[100];
593 /* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2)
594 support %n in format strings in read-only memory but not in writable
596 strcpy (fmtstring, "%d %n");
597 if (sprintf (buf, fmtstring, 123, &count, 33, 44, 55) < 0
598 || strcmp (buf, "123 ") != 0
602 }], [gl_cv_func_printf_directive_n=yes], [gl_cv_func_printf_directive_n=no],
606 *) gl_cv_func_printf_directive_n="guessing yes";;
613 dnl Test whether the *printf family of functions supports POSIX/XSI format
614 dnl strings with positions. (POSIX:2001)
615 dnl Result is gl_cv_func_printf_positions.
617 AC_DEFUN([gl_PRINTF_POSITIONS],
619 AC_REQUIRE([AC_PROG_CC])
620 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
621 AC_CACHE_CHECK([whether printf supports POSIX/XSI format strings with positions],
622 [gl_cv_func_printf_positions],
627 /* The string "%2$d %1$d", with dollar characters protected from the shell's
628 dollar expansion (possibly an autoconf bug). */
629 static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
630 static char buf[100];
633 sprintf (buf, format, 33, 55);
634 return (strcmp (buf, "55 33") != 0);
635 }], [gl_cv_func_printf_positions=yes], [gl_cv_func_printf_positions=no],
639 netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*)
640 gl_cv_func_printf_positions="guessing no";;
641 beos*) gl_cv_func_printf_positions="guessing no";;
642 mingw* | pw*) gl_cv_func_printf_positions="guessing no";;
643 *) gl_cv_func_printf_positions="guessing yes";;
650 dnl Test whether the *printf family of functions supports POSIX/XSI format
651 dnl strings with the ' flag for grouping of decimal digits. (POSIX:2001)
652 dnl Result is gl_cv_func_printf_flag_grouping.
654 AC_DEFUN([gl_PRINTF_FLAG_GROUPING],
656 AC_REQUIRE([AC_PROG_CC])
657 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
658 AC_CACHE_CHECK([whether printf supports the grouping flag],
659 [gl_cv_func_printf_flag_grouping],
664 static char buf[100];
667 if (sprintf (buf, "%'d %d", 1234567, 99) < 0
668 || buf[strlen (buf) - 1] != '9')
671 }], [gl_cv_func_printf_flag_grouping=yes], [gl_cv_func_printf_flag_grouping=no],
675 cygwin*) gl_cv_func_printf_flag_grouping="guessing no";;
676 netbsd*) gl_cv_func_printf_flag_grouping="guessing no";;
677 mingw* | pw*) gl_cv_func_printf_flag_grouping="guessing no";;
678 *) gl_cv_func_printf_flag_grouping="guessing yes";;
685 dnl Test whether the *printf family of functions supports padding of non-finite
686 dnl values with the 0 flag correctly. (ISO C99 + TC1 + TC2.) See
687 dnl <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html>
688 dnl Result is gl_cv_func_printf_flag_zero.
690 AC_DEFUN([gl_PRINTF_FLAG_ZERO],
692 AC_REQUIRE([AC_PROG_CC])
693 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
694 AC_CACHE_CHECK([whether printf supports the zero flag correctly],
695 [gl_cv_func_printf_flag_zero],
700 static char buf[100];
703 if (sprintf (buf, "%010f", 1.0 / 0.0, 33, 44, 55) < 0
704 || (strcmp (buf, " inf") != 0
705 && strcmp (buf, " infinity") != 0))
708 }], [gl_cv_func_printf_flag_zero=yes], [gl_cv_func_printf_flag_zero=no],
712 # Guess yes on glibc systems.
713 *-gnu*) gl_cv_func_printf_flag_zero="guessing yes";;
715 beos*) gl_cv_func_printf_flag_zero="guessing yes";;
716 # If we don't know, assume the worst.
717 *) gl_cv_func_printf_flag_zero="guessing no";;
724 dnl Test whether the *printf family of functions recovers gracefully in case
725 dnl of an out-of-memory condition, or whether it crashes the entire program.
726 dnl Result is gl_cv_func_printf_enomem.
728 AC_DEFUN([gl_PRINTF_ENOMEM],
730 AC_REQUIRE([AC_PROG_CC])
731 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
732 AC_CACHE_CHECK([whether printf survives out-of-memory conditions],
733 [gl_cv_func_printf_enomem],
735 if test "$cross_compiling" = no; then
736 AC_LANG_CONFTEST([AC_LANG_SOURCE([
739 #include <sys/types.h>
740 #include <sys/time.h>
741 #include <sys/resource.h>
747 /* Some printf implementations allocate temporary space with malloc. */
748 /* On BSD systems, malloc() is limited by RLIMIT_DATA. */
750 if (getrlimit (RLIMIT_DATA, &limit) < 0)
752 if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
753 limit.rlim_max = 5000000;
754 limit.rlim_cur = limit.rlim_max;
755 if (setrlimit (RLIMIT_DATA, &limit) < 0)
758 /* On Linux systems, malloc() is limited by RLIMIT_AS. */
760 if (getrlimit (RLIMIT_AS, &limit) < 0)
762 if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
763 limit.rlim_max = 5000000;
764 limit.rlim_cur = limit.rlim_max;
765 if (setrlimit (RLIMIT_AS, &limit) < 0)
768 /* Some printf implementations allocate temporary space on the stack. */
770 if (getrlimit (RLIMIT_STACK, &limit) < 0)
772 if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
773 limit.rlim_max = 5000000;
774 limit.rlim_cur = limit.rlim_max;
775 if (setrlimit (RLIMIT_STACK, &limit) < 0)
778 ret = printf ("%.5000000f", 1.0);
779 return !(ret == 5000002 || (ret < 0 && errno == ENOMEM));
783 if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
786 if test $result != 0 && test $result != 77; then result=1; fi
788 ) >/dev/null 2>/dev/null
790 0) gl_cv_func_printf_enomem="yes" ;;
791 77) gl_cv_func_printf_enomem="guessing no" ;;
792 *) gl_cv_func_printf_enomem="no" ;;
795 gl_cv_func_printf_enomem="guessing no"
801 # Guess yes on glibc systems.
802 *-gnu*) gl_cv_func_printf_enomem="guessing yes";;
803 # Guess yes on Solaris.
804 solaris*) gl_cv_func_printf_enomem="guessing yes";;
806 aix*) gl_cv_func_printf_enomem="guessing yes";;
807 # Guess yes on HP-UX/hppa.
808 hpux*) case "$host_cpu" in
809 hppa*) gl_cv_func_printf_enomem="guessing yes";;
810 *) gl_cv_func_printf_enomem="guessing no";;
814 irix*) gl_cv_func_printf_enomem="guessing yes";;
815 # Guess yes on OSF/1.
816 osf*) gl_cv_func_printf_enomem="guessing yes";;
818 beos*) gl_cv_func_printf_enomem="guessing yes";;
819 # If we don't know, assume the worst.
820 *) gl_cv_func_printf_enomem="guessing no";;
827 dnl Test whether the snprintf function exists. (ISO C99, POSIX:2001)
828 dnl Result is ac_cv_func_snprintf.
830 AC_DEFUN([gl_SNPRINTF_PRESENCE],
832 AC_CHECK_FUNCS_ONCE([snprintf])
835 dnl Test whether the string produced by the snprintf function is always NUL
836 dnl terminated. (ISO C99, POSIX:2001)
837 dnl Result is gl_cv_func_snprintf_truncation_c99.
839 AC_DEFUN([gl_SNPRINTF_TRUNCATION_C99],
841 AC_REQUIRE([AC_PROG_CC])
842 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
843 AC_CACHE_CHECK([whether snprintf truncates the result as in C99],
844 [gl_cv_func_snprintf_truncation_c99],
849 static char buf[100];
852 strcpy (buf, "ABCDEF");
853 snprintf (buf, 3, "%d %d", 4567, 89);
854 if (memcmp (buf, "45\0DEF", 6) != 0)
857 }], [gl_cv_func_snprintf_truncation_c99=yes], [gl_cv_func_snprintf_truncation_c99=no],
861 # Guess yes on glibc systems.
862 *-gnu*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
863 # Guess yes on FreeBSD >= 5.
864 freebsd[1-4]*) gl_cv_func_snprintf_truncation_c99="guessing no";;
865 freebsd* | kfreebsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
866 # Guess yes on MacOS X >= 10.3.
867 darwin[1-6].*) gl_cv_func_snprintf_truncation_c99="guessing no";;
868 darwin*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
869 # Guess yes on OpenBSD >= 3.9.
870 openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
871 gl_cv_func_snprintf_truncation_c99="guessing no";;
872 openbsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
873 # Guess yes on Solaris >= 2.6.
874 solaris2.[0-5]*) gl_cv_func_snprintf_truncation_c99="guessing no";;
875 solaris*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
876 # Guess yes on AIX >= 4.
877 aix[1-3]*) gl_cv_func_snprintf_truncation_c99="guessing no";;
878 aix*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
879 # Guess yes on HP-UX >= 11.
880 hpux[7-9]* | hpux10*) gl_cv_func_snprintf_truncation_c99="guessing no";;
881 hpux*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
882 # Guess yes on IRIX >= 6.5.
883 irix6.5) gl_cv_func_snprintf_truncation_c99="guessing yes";;
884 # Guess yes on OSF/1 >= 5.
885 osf[3-4]*) gl_cv_func_snprintf_truncation_c99="guessing no";;
886 osf*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
887 # Guess yes on NetBSD >= 3.
888 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
889 gl_cv_func_snprintf_truncation_c99="guessing no";;
890 netbsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
892 beos*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
893 # If we don't know, assume the worst.
894 *) gl_cv_func_snprintf_truncation_c99="guessing no";;
901 dnl Test whether the return value of the snprintf function is the number
902 dnl of bytes (excluding the terminating NUL) that would have been produced
903 dnl if the buffer had been large enough. (ISO C99, POSIX:2001)
904 dnl For example, this test program fails on IRIX 6.5:
905 dnl ---------------------------------------------------------------------
906 dnl #include <stdio.h>
909 dnl static char buf[8];
910 dnl int retval = snprintf (buf, 3, "%d", 12345);
911 dnl return retval >= 0 && retval < 3;
913 dnl ---------------------------------------------------------------------
914 dnl Result is gl_cv_func_snprintf_retval_c99.
916 AC_DEFUN([gl_SNPRINTF_RETVAL_C99],
918 AC_REQUIRE([AC_PROG_CC])
919 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
920 AC_CACHE_CHECK([whether snprintf returns a byte count as in C99],
921 [gl_cv_func_snprintf_retval_c99],
926 static char buf[100];
929 strcpy (buf, "ABCDEF");
930 if (snprintf (buf, 3, "%d %d", 4567, 89) != 7)
933 }], [gl_cv_func_snprintf_retval_c99=yes], [gl_cv_func_snprintf_retval_c99=no],
937 # Guess yes on glibc systems.
938 *-gnu*) gl_cv_func_snprintf_retval_c99="guessing yes";;
939 # Guess yes on FreeBSD >= 5.
940 freebsd[1-4]*) gl_cv_func_snprintf_retval_c99="guessing no";;
941 freebsd* | kfreebsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
942 # Guess yes on MacOS X >= 10.3.
943 darwin[1-6].*) gl_cv_func_snprintf_retval_c99="guessing no";;
944 darwin*) gl_cv_func_snprintf_retval_c99="guessing yes";;
945 # Guess yes on OpenBSD >= 3.9.
946 openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
947 gl_cv_func_snprintf_retval_c99="guessing no";;
948 openbsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
949 # Guess yes on Solaris >= 2.6.
950 solaris2.[0-5]*) gl_cv_func_snprintf_retval_c99="guessing no";;
951 solaris*) gl_cv_func_snprintf_retval_c99="guessing yes";;
952 # Guess yes on AIX >= 4.
953 aix[1-3]*) gl_cv_func_snprintf_retval_c99="guessing no";;
954 aix*) gl_cv_func_snprintf_retval_c99="guessing yes";;
955 # Guess yes on NetBSD >= 3.
956 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
957 gl_cv_func_snprintf_retval_c99="guessing no";;
958 netbsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
960 beos*) gl_cv_func_snprintf_retval_c99="guessing yes";;
961 # If we don't know, assume the worst.
962 *) gl_cv_func_snprintf_retval_c99="guessing no";;
969 dnl Test whether the snprintf function supports the %n format directive
970 dnl also in truncated portions of the format string. (ISO C99, POSIX:2001)
971 dnl Result is gl_cv_func_snprintf_directive_n.
973 AC_DEFUN([gl_SNPRINTF_DIRECTIVE_N],
975 AC_REQUIRE([AC_PROG_CC])
976 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
977 AC_CACHE_CHECK([whether snprintf fully supports the 'n' directive],
978 [gl_cv_func_snprintf_directive_n],
983 static char fmtstring[10];
984 static char buf[100];
988 /* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2)
989 support %n in format strings in read-only memory but not in writable
991 strcpy (fmtstring, "%d %n");
992 snprintf (buf, 4, fmtstring, 12345, &count, 33, 44, 55);
996 }], [gl_cv_func_snprintf_directive_n=yes], [gl_cv_func_snprintf_directive_n=no],
1000 # Guess yes on glibc systems.
1001 *-gnu*) gl_cv_func_snprintf_directive_n="guessing yes";;
1002 # Guess yes on FreeBSD >= 5.
1003 freebsd[1-4]*) gl_cv_func_snprintf_directive_n="guessing no";;
1004 freebsd* | kfreebsd*) gl_cv_func_snprintf_directive_n="guessing yes";;
1005 # Guess yes on MacOS X >= 10.3.
1006 darwin[1-6].*) gl_cv_func_snprintf_directive_n="guessing no";;
1007 darwin*) gl_cv_func_snprintf_directive_n="guessing yes";;
1008 # Guess yes on Solaris >= 2.6.
1009 solaris2.[0-5]*) gl_cv_func_snprintf_directive_n="guessing no";;
1010 solaris*) gl_cv_func_snprintf_directive_n="guessing yes";;
1011 # Guess yes on AIX >= 4.
1012 aix[1-3]*) gl_cv_func_snprintf_directive_n="guessing no";;
1013 aix*) gl_cv_func_snprintf_directive_n="guessing yes";;
1014 # Guess yes on IRIX >= 6.5.
1015 irix6.5) gl_cv_func_snprintf_directive_n="guessing yes";;
1016 # Guess yes on OSF/1 >= 5.
1017 osf[3-4]*) gl_cv_func_snprintf_directive_n="guessing no";;
1018 osf*) gl_cv_func_snprintf_directive_n="guessing yes";;
1019 # Guess yes on NetBSD >= 3.
1020 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
1021 gl_cv_func_snprintf_directive_n="guessing no";;
1022 netbsd*) gl_cv_func_snprintf_directive_n="guessing yes";;
1023 # Guess yes on BeOS.
1024 beos*) gl_cv_func_snprintf_directive_n="guessing yes";;
1025 # If we don't know, assume the worst.
1026 *) gl_cv_func_snprintf_directive_n="guessing no";;
1033 dnl Test whether the vsnprintf function, when passed a zero size, produces no
1034 dnl output. (ISO C99, POSIX:2001)
1035 dnl For example, snprintf nevertheless writes a NUL byte in this case
1037 dnl ---------------------------------------------------------------------
1038 dnl #include <stdio.h>
1041 dnl static char buf[8] = "DEADBEEF";
1042 dnl snprintf (buf, 0, "%d", 12345);
1043 dnl return buf[0] != 'D';
1045 dnl ---------------------------------------------------------------------
1046 dnl And vsnprintf writes any output without bounds in this case, behaving like
1047 dnl vsprintf, on HP-UX 11 and OSF/1 5.1:
1048 dnl ---------------------------------------------------------------------
1049 dnl #include <stdarg.h>
1050 dnl #include <stdio.h>
1051 dnl static int my_snprintf (char *buf, int size, const char *format, ...)
1055 dnl va_start (args, format);
1056 dnl ret = vsnprintf (buf, size, format, args);
1062 dnl static char buf[8] = "DEADBEEF";
1063 dnl my_snprintf (buf, 0, "%d", 12345);
1064 dnl return buf[0] != 'D';
1066 dnl ---------------------------------------------------------------------
1067 dnl Result is gl_cv_func_vsnprintf_zerosize_c99.
1069 AC_DEFUN([gl_VSNPRINTF_ZEROSIZE_C99],
1071 AC_REQUIRE([AC_PROG_CC])
1072 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
1073 AC_CACHE_CHECK([whether vsnprintf respects a zero size as in C99],
1074 [gl_cv_func_vsnprintf_zerosize_c99],
1079 static int my_snprintf (char *buf, int size, const char *format, ...)
1083 va_start (args, format);
1084 ret = vsnprintf (buf, size, format, args);
1090 static char buf[8] = "DEADBEEF";
1091 my_snprintf (buf, 0, "%d", 12345);
1092 return buf[0] != 'D';
1094 [gl_cv_func_vsnprintf_zerosize_c99=yes],
1095 [gl_cv_func_vsnprintf_zerosize_c99=no],
1099 # Guess yes on glibc systems.
1100 *-gnu*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
1101 # Guess yes on FreeBSD >= 5.
1102 freebsd[1-4]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
1103 freebsd* | kfreebsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
1104 # Guess yes on MacOS X >= 10.3.
1105 darwin[1-6].*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
1106 darwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
1107 # Guess yes on Cygwin.
1108 cygwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
1109 # Guess yes on Solaris >= 2.6.
1110 solaris2.[0-5]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
1111 solaris*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
1112 # Guess yes on AIX >= 4.
1113 aix[1-3]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
1114 aix*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
1115 # Guess yes on IRIX >= 6.5.
1116 irix6.5) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
1117 # Guess yes on NetBSD >= 3.
1118 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
1119 gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
1120 netbsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
1121 # Guess yes on BeOS.
1122 beos*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
1123 # Guess yes on mingw.
1124 mingw* | pw*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
1125 # If we don't know, assume the worst.
1126 *) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
1133 dnl The results of these tests on various platforms are:
1135 dnl 1 = gl_PRINTF_SIZES_C99
1136 dnl 2 = gl_PRINTF_LONG_DOUBLE
1137 dnl 3 = gl_PRINTF_INFINITE
1138 dnl 4 = gl_PRINTF_INFINITE_LONG_DOUBLE
1139 dnl 5 = gl_PRINTF_DIRECTIVE_A
1140 dnl 6 = gl_PRINTF_DIRECTIVE_F
1141 dnl 7 = gl_PRINTF_DIRECTIVE_N
1142 dnl 8 = gl_PRINTF_POSITIONS
1143 dnl 9 = gl_PRINTF_FLAG_GROUPING
1144 dnl 10 = gl_PRINTF_FLAG_ZERO
1145 dnl 11 = gl_PRINTF_ENOMEM
1146 dnl 12 = gl_SNPRINTF_PRESENCE
1147 dnl 13 = gl_SNPRINTF_TRUNCATION_C99
1148 dnl 14 = gl_SNPRINTF_RETVAL_C99
1149 dnl 15 = gl_SNPRINTF_DIRECTIVE_N
1150 dnl 16 = gl_VSNPRINTF_ZEROSIZE_C99
1152 dnl 1 = checking whether printf supports size specifiers as in C99...
1153 dnl 2 = checking whether printf supports 'long double' arguments...
1154 dnl 3 = checking whether printf supports infinite 'double' arguments...
1155 dnl 4 = checking whether printf supports infinite 'long double' arguments...
1156 dnl 5 = checking whether printf supports the 'a' and 'A' directives...
1157 dnl 6 = checking whether printf supports the 'F' directive...
1158 dnl 7 = checking whether printf supports the 'n' directive...
1159 dnl 8 = checking whether printf supports POSIX/XSI format strings with positions...
1160 dnl 9 = checking whether printf supports the grouping flag...
1161 dnl 10 = checking whether printf supports the zero flag correctly...
1162 dnl 11 = checking whether printf survives out-of-memory conditions...
1163 dnl 12 = checking for snprintf...
1164 dnl 13 = checking whether snprintf truncates the result as in C99...
1165 dnl 14 = checking whether snprintf returns a byte count as in C99...
1166 dnl 15 = checking whether snprintf fully supports the 'n' directive...
1167 dnl 16 = checking whether vsnprintf respects a zero size as in C99...
1169 dnl . = yes, # = no.
1171 dnl 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1172 dnl glibc 2.5 . . . . . . . . . . . . . . . .
1173 dnl glibc 2.3.6 . . . . # . . . . . . . . . . .
1174 dnl FreeBSD 5.4, 6.1 . . . . # . . . . # # . . . . .
1175 dnl MacOS X 10.3.9 . . . . # . . . . # # . . . . .
1176 dnl OpenBSD 3.9, 4.0 . ? ? ? # ? . . ? ? ? . . . ? ?
1177 dnl Cygwin 2007 (= Cygwin 1.5.24) . . . . # # . . . # ? . . . . .
1178 dnl Cygwin 2006 (= Cygwin 1.5.19) # . . . # # . . # # ? . . . . .
1179 dnl Solaris 10 . . # # # . . . . # . . . . . .
1180 dnl Solaris 2.6 ... 9 # . # # # # . . . # . . . . . .
1181 dnl Solaris 2.5.1 # . # # # # . . . # . # # # # #
1182 dnl AIX 5.2 . . # # # . . . . # . . . . . .
1183 dnl AIX 4.3.2, 5.1 # . # # # # . . . # . . . . . .
1184 dnl HP-UX 11.31 . . . . # . . . . # . . . # # .
1185 dnl HP-UX 10.20, 11.{00,11,23} # . . . # # . . . # . . . # # #
1186 dnl IRIX 6.5 # . # # # # . . . # . . . # . .
1187 dnl OSF/1 5.1 # . # # # # . . . # . . . # . #
1188 dnl OSF/1 4.0d # . # # # # . . . # . # # # # #
1189 dnl NetBSD 4.0 . ? ? ? ? ? . . ? ? ? . . . ? ?
1190 dnl NetBSD 3.0 . . . . # # . # # # # . . . . .
1191 dnl BeOS # # . # # # . # . . ? . . . . .
1192 dnl mingw # # # # # # . # # # ? . # # # .