1# printf.m4 serial 50 2dnl Copyright (C) 2003, 2007-2012 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7dnl Test whether the *printf family of functions supports the 'j', 'z', 't', 8dnl 'L' size specifiers. (ISO C99, POSIX:2001) 9dnl Result is gl_cv_func_printf_sizes_c99. 10 11AC_DEFUN([gl_PRINTF_SIZES_C99], 12[ 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], 19 [ 20 AC_RUN_IFELSE( 21 [AC_LANG_SOURCE([[ 22#include <stddef.h> 23#include <stdio.h> 24#include <string.h> 25#include <sys/types.h> 26#if HAVE_STDINT_H_WITH_UINTMAX 27# include <stdint.h> 28#endif 29#if HAVE_INTTYPES_H_WITH_UINTMAX 30# include <inttypes.h> 31#endif 32static char buf[100]; 33int main () 34{ 35 int result = 0; 36#if HAVE_STDINT_H_WITH_UINTMAX || HAVE_INTTYPES_H_WITH_UINTMAX 37 buf[0] = '\0'; 38 if (sprintf (buf, "%ju %d", (uintmax_t) 12345671, 33, 44, 55) < 0 39 || strcmp (buf, "12345671 33") != 0) 40 result |= 1; 41#endif 42 buf[0] = '\0'; 43 if (sprintf (buf, "%zu %d", (size_t) 12345672, 33, 44, 55) < 0 44 || strcmp (buf, "12345672 33") != 0) 45 result |= 2; 46 buf[0] = '\0'; 47 if (sprintf (buf, "%tu %d", (ptrdiff_t) 12345673, 33, 44, 55) < 0 48 || strcmp (buf, "12345673 33") != 0) 49 result |= 4; 50 buf[0] = '\0'; 51 if (sprintf (buf, "%Lg %d", (long double) 1.5, 33, 44, 55) < 0 52 || strcmp (buf, "1.5 33") != 0) 53 result |= 8; 54 return result; 55}]])], 56 [gl_cv_func_printf_sizes_c99=yes], 57 [gl_cv_func_printf_sizes_c99=no], 58 [ 59changequote(,)dnl 60 case "$host_os" in 61 # Guess yes on glibc systems. 62 *-gnu*) gl_cv_func_printf_sizes_c99="guessing yes";; 63 # Guess yes on FreeBSD >= 5. 64 freebsd[1-4]*) gl_cv_func_printf_sizes_c99="guessing no";; 65 freebsd* | kfreebsd*) gl_cv_func_printf_sizes_c99="guessing yes";; 66 # Guess yes on Mac OS X >= 10.3. 67 darwin[1-6].*) gl_cv_func_printf_sizes_c99="guessing no";; 68 darwin*) gl_cv_func_printf_sizes_c99="guessing yes";; 69 # Guess yes on OpenBSD >= 3.9. 70 openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*) 71 gl_cv_func_printf_sizes_c99="guessing no";; 72 openbsd*) gl_cv_func_printf_sizes_c99="guessing yes";; 73 # Guess yes on Solaris >= 2.10. 74 solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";; 75 solaris*) gl_cv_func_printf_sizes_c99="guessing no";; 76 # Guess yes on NetBSD >= 3. 77 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) 78 gl_cv_func_printf_sizes_c99="guessing no";; 79 netbsd*) gl_cv_func_printf_sizes_c99="guessing yes";; 80 # If we don't know, assume the worst. 81 *) gl_cv_func_printf_sizes_c99="guessing no";; 82 esac 83changequote([,])dnl 84 ]) 85 ]) 86]) 87 88dnl Test whether the *printf family of functions supports 'long double' 89dnl arguments together with the 'L' size specifier. (ISO C99, POSIX:2001) 90dnl Result is gl_cv_func_printf_long_double. 91 92AC_DEFUN([gl_PRINTF_LONG_DOUBLE], 93[ 94 AC_REQUIRE([AC_PROG_CC]) 95 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 96 AC_CACHE_CHECK([whether printf supports 'long double' arguments], 97 [gl_cv_func_printf_long_double], 98 [ 99 AC_RUN_IFELSE( 100 [AC_LANG_SOURCE([[ 101#include <stdio.h> 102#include <string.h> 103static char buf[10000]; 104int main () 105{ 106 int result = 0; 107 buf[0] = '\0'; 108 if (sprintf (buf, "%Lf %d", 1.75L, 33, 44, 55) < 0 109 || strcmp (buf, "1.750000 33") != 0) 110 result |= 1; 111 buf[0] = '\0'; 112 if (sprintf (buf, "%Le %d", 1.75L, 33, 44, 55) < 0 113 || strcmp (buf, "1.750000e+00 33") != 0) 114 result |= 2; 115 buf[0] = '\0'; 116 if (sprintf (buf, "%Lg %d", 1.75L, 33, 44, 55) < 0 117 || strcmp (buf, "1.75 33") != 0) 118 result |= 4; 119 return result; 120}]])], 121 [gl_cv_func_printf_long_double=yes], 122 [gl_cv_func_printf_long_double=no], 123 [ 124changequote(,)dnl 125 case "$host_os" in 126 beos*) gl_cv_func_printf_long_double="guessing no";; 127 mingw* | pw*) gl_cv_func_printf_long_double="guessing no";; 128 *) gl_cv_func_printf_long_double="guessing yes";; 129 esac 130changequote([,])dnl 131 ]) 132 ]) 133]) 134 135dnl Test whether the *printf family of functions supports infinite and NaN 136dnl 'double' arguments and negative zero arguments in the %f, %e, %g 137dnl directives. (ISO C99, POSIX:2001) 138dnl Result is gl_cv_func_printf_infinite. 139 140AC_DEFUN([gl_PRINTF_INFINITE], 141[ 142 AC_REQUIRE([AC_PROG_CC]) 143 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 144 AC_CACHE_CHECK([whether printf supports infinite 'double' arguments], 145 [gl_cv_func_printf_infinite], 146 [ 147 AC_RUN_IFELSE( 148 [AC_LANG_SOURCE([[ 149#include <stdio.h> 150#include <string.h> 151static int 152strisnan (const char *string, size_t start_index, size_t end_index) 153{ 154 if (start_index < end_index) 155 { 156 if (string[start_index] == '-') 157 start_index++; 158 if (start_index + 3 <= end_index 159 && memcmp (string + start_index, "nan", 3) == 0) 160 { 161 start_index += 3; 162 if (start_index == end_index 163 || (string[start_index] == '(' && string[end_index - 1] == ')')) 164 return 1; 165 } 166 } 167 return 0; 168} 169static int 170have_minus_zero () 171{ 172 static double plus_zero = 0.0; 173 double minus_zero = - plus_zero; 174 return memcmp (&plus_zero, &minus_zero, sizeof (double)) != 0; 175} 176static char buf[10000]; 177static double zero = 0.0; 178int main () 179{ 180 int result = 0; 181 if (sprintf (buf, "%f", 1.0 / zero) < 0 182 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) 183 result |= 1; 184 if (sprintf (buf, "%f", -1.0 / zero) < 0 185 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) 186 result |= 1; 187 if (sprintf (buf, "%f", zero / zero) < 0 188 || !strisnan (buf, 0, strlen (buf))) 189 result |= 2; 190 if (sprintf (buf, "%e", 1.0 / zero) < 0 191 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) 192 result |= 4; 193 if (sprintf (buf, "%e", -1.0 / zero) < 0 194 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) 195 result |= 4; 196 if (sprintf (buf, "%e", zero / zero) < 0 197 || !strisnan (buf, 0, strlen (buf))) 198 result |= 8; 199 if (sprintf (buf, "%g", 1.0 / zero) < 0 200 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) 201 result |= 16; 202 if (sprintf (buf, "%g", -1.0 / zero) < 0 203 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) 204 result |= 16; 205 if (sprintf (buf, "%g", zero / zero) < 0 206 || !strisnan (buf, 0, strlen (buf))) 207 result |= 32; 208 /* This test fails on HP-UX 10.20. */ 209 if (have_minus_zero ()) 210 if (sprintf (buf, "%g", - zero) < 0 211 || strcmp (buf, "-0") != 0) 212 result |= 64; 213 return result; 214}]])], 215 [gl_cv_func_printf_infinite=yes], 216 [gl_cv_func_printf_infinite=no], 217 [ 218changequote(,)dnl 219 case "$host_os" in 220 # Guess yes on glibc systems. 221 *-gnu*) gl_cv_func_printf_infinite="guessing yes";; 222 # Guess yes on FreeBSD >= 6. 223 freebsd[1-5]*) gl_cv_func_printf_infinite="guessing no";; 224 freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";; 225 # Guess yes on Mac OS X >= 10.3. 226 darwin[1-6].*) gl_cv_func_printf_infinite="guessing no";; 227 darwin*) gl_cv_func_printf_infinite="guessing yes";; 228 # Guess yes on HP-UX >= 11. 229 hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite="guessing no";; 230 hpux*) gl_cv_func_printf_infinite="guessing yes";; 231 # Guess yes on NetBSD >= 3. 232 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) 233 gl_cv_func_printf_infinite="guessing no";; 234 netbsd*) gl_cv_func_printf_infinite="guessing yes";; 235 # Guess yes on BeOS. 236 beos*) gl_cv_func_printf_infinite="guessing yes";; 237 # If we don't know, assume the worst. 238 *) gl_cv_func_printf_infinite="guessing no";; 239 esac 240changequote([,])dnl 241 ]) 242 ]) 243]) 244 245dnl Test whether the *printf family of functions supports infinite and NaN 246dnl 'long double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001) 247dnl Result is gl_cv_func_printf_infinite_long_double. 248 249AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE], 250[ 251 AC_REQUIRE([gl_PRINTF_LONG_DOUBLE]) 252 AC_REQUIRE([AC_PROG_CC]) 253 AC_REQUIRE([gl_BIGENDIAN]) 254 AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) 255 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 256 dnl The user can set or unset the variable gl_printf_safe to indicate 257 dnl that he wishes a safe handling of non-IEEE-754 'long double' values. 258 if test -n "$gl_printf_safe"; then 259 AC_DEFINE([CHECK_PRINTF_SAFE], [1], 260 [Define if you wish *printf() functions that have a safe handling of 261 non-IEEE-754 'long double' values.]) 262 fi 263 case "$gl_cv_func_printf_long_double" in 264 *yes) 265 AC_CACHE_CHECK([whether printf supports infinite 'long double' arguments], 266 [gl_cv_func_printf_infinite_long_double], 267 [ 268 AC_RUN_IFELSE( 269 [AC_LANG_SOURCE([[ 270]GL_NOCRASH[ 271#include <float.h> 272#include <stdio.h> 273#include <string.h> 274static int 275strisnan (const char *string, size_t start_index, size_t end_index) 276{ 277 if (start_index < end_index) 278 { 279 if (string[start_index] == '-') 280 start_index++; 281 if (start_index + 3 <= end_index 282 && memcmp (string + start_index, "nan", 3) == 0) 283 { 284 start_index += 3; 285 if (start_index == end_index 286 || (string[start_index] == '(' && string[end_index - 1] == ')')) 287 return 1; 288 } 289 } 290 return 0; 291} 292static char buf[10000]; 293static long double zeroL = 0.0L; 294int main () 295{ 296 int result = 0; 297 nocrash_init(); 298 if (sprintf (buf, "%Lf", 1.0L / zeroL) < 0 299 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) 300 result |= 1; 301 if (sprintf (buf, "%Lf", -1.0L / zeroL) < 0 302 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) 303 result |= 1; 304 if (sprintf (buf, "%Lf", zeroL / zeroL) < 0 305 || !strisnan (buf, 0, strlen (buf))) 306 result |= 1; 307 if (sprintf (buf, "%Le", 1.0L / zeroL) < 0 308 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) 309 result |= 1; 310 if (sprintf (buf, "%Le", -1.0L / zeroL) < 0 311 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) 312 result |= 1; 313 if (sprintf (buf, "%Le", zeroL / zeroL) < 0 314 || !strisnan (buf, 0, strlen (buf))) 315 result |= 1; 316 if (sprintf (buf, "%Lg", 1.0L / zeroL) < 0 317 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) 318 result |= 1; 319 if (sprintf (buf, "%Lg", -1.0L / zeroL) < 0 320 || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) 321 result |= 1; 322 if (sprintf (buf, "%Lg", zeroL / zeroL) < 0 323 || !strisnan (buf, 0, strlen (buf))) 324 result |= 1; 325#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_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE 326/* Representation of an 80-bit 'long double' as an initializer for a sequence 327 of 'unsigned int' words. */ 328# ifdef WORDS_BIGENDIAN 329# define LDBL80_WORDS(exponent,manthi,mantlo) \ 330 { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \ 331 ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \ 332 (unsigned int) (mantlo) << 16 \ 333 } 334# else 335# define LDBL80_WORDS(exponent,manthi,mantlo) \ 336 { mantlo, manthi, exponent } 337# endif 338 { /* Quiet NaN. */ 339 static union { unsigned int word[4]; long double value; } x = 340 { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) }; 341 if (sprintf (buf, "%Lf", x.value) < 0 342 || !strisnan (buf, 0, strlen (buf))) 343 result |= 2; 344 if (sprintf (buf, "%Le", x.value) < 0 345 || !strisnan (buf, 0, strlen (buf))) 346 result |= 2; 347 if (sprintf (buf, "%Lg", x.value) < 0 348 || !strisnan (buf, 0, strlen (buf))) 349 result |= 2; 350 } 351 { 352 /* Signalling NaN. */ 353 static union { unsigned int word[4]; long double value; } x = 354 { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) }; 355 if (sprintf (buf, "%Lf", x.value) < 0 356 || !strisnan (buf, 0, strlen (buf))) 357 result |= 2; 358 if (sprintf (buf, "%Le", x.value) < 0 359 || !strisnan (buf, 0, strlen (buf))) 360 result |= 2; 361 if (sprintf (buf, "%Lg", x.value) < 0 362 || !strisnan (buf, 0, strlen (buf))) 363 result |= 2; 364 } 365 { /* Pseudo-NaN. */ 366 static union { unsigned int word[4]; long double value; } x = 367 { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) }; 368 if (sprintf (buf, "%Lf", x.value) < 0 369 || !strisnan (buf, 0, strlen (buf))) 370 result |= 4; 371 if (sprintf (buf, "%Le", x.value) < 0 372 || !strisnan (buf, 0, strlen (buf))) 373 result |= 4; 374 if (sprintf (buf, "%Lg", x.value) < 0 375 || !strisnan (buf, 0, strlen (buf))) 376 result |= 4; 377 } 378 { /* Pseudo-Infinity. */ 379 static union { unsigned int word[4]; long double value; } x = 380 { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) }; 381 if (sprintf (buf, "%Lf", x.value) < 0 382 || !strisnan (buf, 0, strlen (buf))) 383 result |= 8; 384 if (sprintf (buf, "%Le", x.value) < 0 385 || !strisnan (buf, 0, strlen (buf))) 386 result |= 8; 387 if (sprintf (buf, "%Lg", x.value) < 0 388 || !strisnan (buf, 0, strlen (buf))) 389 result |= 8; 390 } 391 { /* Pseudo-Zero. */ 392 static union { unsigned int word[4]; long double value; } x = 393 { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) }; 394 if (sprintf (buf, "%Lf", x.value) < 0 395 || !strisnan (buf, 0, strlen (buf))) 396 result |= 16; 397 if (sprintf (buf, "%Le", x.value) < 0 398 || !strisnan (buf, 0, strlen (buf))) 399 result |= 16; 400 if (sprintf (buf, "%Lg", x.value) < 0 401 || !strisnan (buf, 0, strlen (buf))) 402 result |= 16; 403 } 404 { /* Unnormalized number. */ 405 static union { unsigned int word[4]; long double value; } x = 406 { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) }; 407 if (sprintf (buf, "%Lf", x.value) < 0 408 || !strisnan (buf, 0, strlen (buf))) 409 result |= 32; 410 if (sprintf (buf, "%Le", x.value) < 0 411 || !strisnan (buf, 0, strlen (buf))) 412 result |= 32; 413 if (sprintf (buf, "%Lg", x.value) < 0 414 || !strisnan (buf, 0, strlen (buf))) 415 result |= 32; 416 } 417 { /* Pseudo-Denormal. */ 418 static union { unsigned int word[4]; long double value; } x = 419 { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) }; 420 if (sprintf (buf, "%Lf", x.value) < 0 421 || !strisnan (buf, 0, strlen (buf))) 422 result |= 64; 423 if (sprintf (buf, "%Le", x.value) < 0 424 || !strisnan (buf, 0, strlen (buf))) 425 result |= 64; 426 if (sprintf (buf, "%Lg", x.value) < 0 427 || !strisnan (buf, 0, strlen (buf))) 428 result |= 64; 429 } 430#endif 431 return result; 432}]])], 433 [gl_cv_func_printf_infinite_long_double=yes], 434 [gl_cv_func_printf_infinite_long_double=no], 435 [ 436changequote(,)dnl 437 case "$host_cpu" in 438 # Guess no on ia64, x86_64, i386. 439 ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";; 440 *) 441 case "$host_os" in 442 # Guess yes on glibc systems. 443 *-gnu*) gl_cv_func_printf_infinite_long_double="guessing yes";; 444 # Guess yes on FreeBSD >= 6. 445 freebsd[1-5]*) gl_cv_func_printf_infinite_long_double="guessing no";; 446 freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";; 447 # Guess yes on HP-UX >= 11. 448 hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";; 449 hpux*) gl_cv_func_printf_infinite_long_double="guessing yes";; 450 # If we don't know, assume the worst. 451 *) gl_cv_func_printf_infinite_long_double="guessing no";; 452 esac 453 ;; 454 esac 455changequote([,])dnl 456 ]) 457 ]) 458 ;; 459 *) 460 gl_cv_func_printf_infinite_long_double="irrelevant" 461 ;; 462 esac 463]) 464 465dnl Test whether the *printf family of functions supports the 'a' and 'A' 466dnl conversion specifier for hexadecimal output of floating-point numbers. 467dnl (ISO C99, POSIX:2001) 468dnl Result is gl_cv_func_printf_directive_a. 469 470AC_DEFUN([gl_PRINTF_DIRECTIVE_A], 471[ 472 AC_REQUIRE([AC_PROG_CC]) 473 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 474 AC_CACHE_CHECK([whether printf supports the 'a' and 'A' directives], 475 [gl_cv_func_printf_directive_a], 476 [ 477 AC_RUN_IFELSE( 478 [AC_LANG_SOURCE([[ 479#include <stdio.h> 480#include <string.h> 481static char buf[100]; 482static double zero = 0.0; 483int main () 484{ 485 int result = 0; 486 if (sprintf (buf, "%a %d", 3.1416015625, 33, 44, 55) < 0 487 || (strcmp (buf, "0x1.922p+1 33") != 0 488 && strcmp (buf, "0x3.244p+0 33") != 0 489 && strcmp (buf, "0x6.488p-1 33") != 0 490 && strcmp (buf, "0xc.91p-2 33") != 0)) 491 result |= 1; 492 if (sprintf (buf, "%A %d", -3.1416015625, 33, 44, 55) < 0 493 || (strcmp (buf, "-0X1.922P+1 33") != 0 494 && strcmp (buf, "-0X3.244P+0 33") != 0 495 && strcmp (buf, "-0X6.488P-1 33") != 0 496 && strcmp (buf, "-0XC.91P-2 33") != 0)) 497 result |= 2; 498 /* This catches a FreeBSD 6.1 bug: it doesn't round. */ 499 if (sprintf (buf, "%.2a %d", 1.51, 33, 44, 55) < 0 500 || (strcmp (buf, "0x1.83p+0 33") != 0 501 && strcmp (buf, "0x3.05p-1 33") != 0 502 && strcmp (buf, "0x6.0ap-2 33") != 0 503 && strcmp (buf, "0xc.14p-3 33") != 0)) 504 result |= 4; 505 /* This catches a FreeBSD 6.1 bug. See 506 <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */ 507 if (sprintf (buf, "%010a %d", 1.0 / zero, 33, 44, 55) < 0 508 || buf[0] == '0') 509 result |= 8; 510 /* This catches a Mac OS X 10.3.9 (Darwin 7.9) bug. */ 511 if (sprintf (buf, "%.1a", 1.999) < 0 512 || (strcmp (buf, "0x1.0p+1") != 0 513 && strcmp (buf, "0x2.0p+0") != 0 514 && strcmp (buf, "0x4.0p-1") != 0 515 && strcmp (buf, "0x8.0p-2") != 0)) 516 result |= 16; 517 /* This catches the same Mac OS X 10.3.9 (Darwin 7.9) bug and also a 518 glibc 2.4 bug <http://sourceware.org/bugzilla/show_bug.cgi?id=2908>. */ 519 if (sprintf (buf, "%.1La", 1.999L) < 0 520 || (strcmp (buf, "0x1.0p+1") != 0 521 && strcmp (buf, "0x2.0p+0") != 0 522 && strcmp (buf, "0x4.0p-1") != 0 523 && strcmp (buf, "0x8.0p-2") != 0)) 524 result |= 32; 525 return result; 526}]])], 527 [gl_cv_func_printf_directive_a=yes], 528 [gl_cv_func_printf_directive_a=no], 529 [ 530 case "$host_os" in 531 # Guess yes on glibc >= 2.5 systems. 532 *-gnu*) 533 AC_EGREP_CPP([BZ2908], [ 534 #include <features.h> 535 #ifdef __GNU_LIBRARY__ 536 #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 5) || (__GLIBC__ > 2)) && !defined __UCLIBC__ 537 BZ2908 538 #endif 539 #endif 540 ], 541 [gl_cv_func_printf_directive_a="guessing yes"], 542 [gl_cv_func_printf_directive_a="guessing no"]) 543 ;; 544 # If we don't know, assume the worst. 545 *) gl_cv_func_printf_directive_a="guessing no";; 546 esac 547 ]) 548 ]) 549]) 550 551dnl Test whether the *printf family of functions supports the %F format 552dnl directive. (ISO C99, POSIX:2001) 553dnl Result is gl_cv_func_printf_directive_f. 554 555AC_DEFUN([gl_PRINTF_DIRECTIVE_F], 556[ 557 AC_REQUIRE([AC_PROG_CC]) 558 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 559 AC_CACHE_CHECK([whether printf supports the 'F' directive], 560 [gl_cv_func_printf_directive_f], 561 [ 562 AC_RUN_IFELSE( 563 [AC_LANG_SOURCE([[ 564#include <stdio.h> 565#include <string.h> 566static char buf[100]; 567static double zero = 0.0; 568int main () 569{ 570 int result = 0; 571 if (sprintf (buf, "%F %d", 1234567.0, 33, 44, 55) < 0 572 || strcmp (buf, "1234567.000000 33") != 0) 573 result |= 1; 574 if (sprintf (buf, "%F", 1.0 / zero) < 0 575 || (strcmp (buf, "INF") != 0 && strcmp (buf, "INFINITY") != 0)) 576 result |= 2; 577 /* This catches a Cygwin 1.5.x bug. */ 578 if (sprintf (buf, "%.F", 1234.0) < 0 579 || strcmp (buf, "1234") != 0) 580 result |= 4; 581 return result; 582}]])], 583 [gl_cv_func_printf_directive_f=yes], 584 [gl_cv_func_printf_directive_f=no], 585 [ 586changequote(,)dnl 587 case "$host_os" in 588 # Guess yes on glibc systems. 589 *-gnu*) gl_cv_func_printf_directive_f="guessing yes";; 590 # Guess yes on FreeBSD >= 6. 591 freebsd[1-5]*) gl_cv_func_printf_directive_f="guessing no";; 592 freebsd* | kfreebsd*) gl_cv_func_printf_directive_f="guessing yes";; 593 # Guess yes on Mac OS X >= 10.3. 594 darwin[1-6].*) gl_cv_func_printf_directive_f="guessing no";; 595 darwin*) gl_cv_func_printf_directive_f="guessing yes";; 596 # Guess yes on Solaris >= 2.10. 597 solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";; 598 solaris*) gl_cv_func_printf_sizes_c99="guessing no";; 599 # If we don't know, assume the worst. 600 *) gl_cv_func_printf_directive_f="guessing no";; 601 esac 602changequote([,])dnl 603 ]) 604 ]) 605]) 606 607dnl Test whether the *printf family of functions supports the %n format 608dnl directive. (ISO C99, POSIX:2001) 609dnl Result is gl_cv_func_printf_directive_n. 610 611AC_DEFUN([gl_PRINTF_DIRECTIVE_N], 612[ 613 AC_REQUIRE([AC_PROG_CC]) 614 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 615 AC_CACHE_CHECK([whether printf supports the 'n' directive], 616 [gl_cv_func_printf_directive_n], 617 [ 618 AC_RUN_IFELSE( 619 [AC_LANG_SOURCE([[ 620#include <stdio.h> 621#include <stdlib.h> 622#include <string.h> 623#ifdef _MSC_VER 624/* See page about "Parameter Validation" on msdn.microsoft.com. */ 625static void cdecl 626invalid_parameter_handler (const wchar_t *expression, 627 const wchar_t *function, 628 const wchar_t *file, unsigned int line, 629 uintptr_t dummy) 630{ 631 exit (1); 632} 633#endif 634static char fmtstring[10]; 635static char buf[100]; 636int main () 637{ 638 int count = -1; 639#ifdef _MSC_VER 640 _set_invalid_parameter_handler (invalid_parameter_handler); 641#endif 642 /* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2) 643 support %n in format strings in read-only memory but not in writable 644 memory. */ 645 strcpy (fmtstring, "%d %n"); 646 if (sprintf (buf, fmtstring, 123, &count, 33, 44, 55) < 0 647 || strcmp (buf, "123 ") != 0 648 || count != 4) 649 return 1; 650 return 0; 651}]])], 652 [gl_cv_func_printf_directive_n=yes], 653 [gl_cv_func_printf_directive_n=no], 654 [ 655changequote(,)dnl 656 case "$host_os" in 657 mingw*) gl_cv_func_printf_directive_n="guessing no";; 658 *) gl_cv_func_printf_directive_n="guessing yes";; 659 esac 660changequote([,])dnl 661 ]) 662 ]) 663]) 664 665dnl Test whether the *printf family of functions supports the %ls format 666dnl directive and in particular, when a precision is specified, whether 667dnl the functions stop converting the wide string argument when the number 668dnl of bytes that have been produced by this conversion equals or exceeds 669dnl the precision. 670dnl Result is gl_cv_func_printf_directive_ls. 671 672AC_DEFUN([gl_PRINTF_DIRECTIVE_LS], 673[ 674 AC_REQUIRE([AC_PROG_CC]) 675 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 676 AC_CACHE_CHECK([whether printf supports the 'ls' directive], 677 [gl_cv_func_printf_directive_ls], 678 [ 679 AC_RUN_IFELSE( 680 [AC_LANG_SOURCE([[ 681/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before 682 <wchar.h>. 683 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be 684 included before <wchar.h>. */ 685#include <stddef.h> 686#include <stdio.h> 687#include <time.h> 688#include <wchar.h> 689#include <string.h> 690int main () 691{ 692 int result = 0; 693 char buf[100]; 694 /* Test whether %ls works at all. 695 This test fails on OpenBSD 4.0, IRIX 6.5, Solaris 2.6, Haiku, but not on 696 Cygwin 1.5. */ 697 { 698 static const wchar_t wstring[] = { 'a', 'b', 'c', 0 }; 699 buf[0] = '\0'; 700 if (sprintf (buf, "%ls", wstring) < 0 701 || strcmp (buf, "abc") != 0) 702 result |= 1; 703 } 704 /* This test fails on IRIX 6.5, Solaris 2.6, Cygwin 1.5, Haiku (with an 705 assertion failure inside libc), but not on OpenBSD 4.0. */ 706 { 707 static const wchar_t wstring[] = { 'a', 0 }; 708 buf[0] = '\0'; 709 if (sprintf (buf, "%ls", wstring) < 0 710 || strcmp (buf, "a") != 0) 711 result |= 2; 712 } 713 /* Test whether precisions in %ls are supported as specified in ISO C 99 714 section 7.19.6.1: 715 "If a precision is specified, no more than that many bytes are written 716 (including shift sequences, if any), and the array shall contain a 717 null wide character if, to equal the multibyte character sequence 718 length given by the precision, the function would need to access a 719 wide character one past the end of the array." 720 This test fails on Solaris 10. */ 721 { 722 static const wchar_t wstring[] = { 'a', 'b', (wchar_t) 0xfdfdfdfd, 0 }; 723 buf[0] = '\0'; 724 if (sprintf (buf, "%.2ls", wstring) < 0 725 || strcmp (buf, "ab") != 0) 726 result |= 8; 727 } 728 return result; 729}]])], 730 [gl_cv_func_printf_directive_ls=yes], 731 [gl_cv_func_printf_directive_ls=no], 732 [ 733changequote(,)dnl 734 case "$host_os" in 735 openbsd*) gl_cv_func_printf_directive_ls="guessing no";; 736 irix*) gl_cv_func_printf_directive_ls="guessing no";; 737 solaris*) gl_cv_func_printf_directive_ls="guessing no";; 738 cygwin*) gl_cv_func_printf_directive_ls="guessing no";; 739 beos* | haiku*) gl_cv_func_printf_directive_ls="guessing no";; 740 *) gl_cv_func_printf_directive_ls="guessing yes";; 741 esac 742changequote([,])dnl 743 ]) 744 ]) 745]) 746 747dnl Test whether the *printf family of functions supports POSIX/XSI format 748dnl strings with positions. (POSIX:2001) 749dnl Result is gl_cv_func_printf_positions. 750 751AC_DEFUN([gl_PRINTF_POSITIONS], 752[ 753 AC_REQUIRE([AC_PROG_CC]) 754 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 755 AC_CACHE_CHECK([whether printf supports POSIX/XSI format strings with positions], 756 [gl_cv_func_printf_positions], 757 [ 758 AC_RUN_IFELSE( 759 [AC_LANG_SOURCE([[ 760#include <stdio.h> 761#include <string.h> 762/* The string "%2$d %1$d", with dollar characters protected from the shell's 763 dollar expansion (possibly an autoconf bug). */ 764static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' }; 765static char buf[100]; 766int main () 767{ 768 sprintf (buf, format, 33, 55); 769 return (strcmp (buf, "55 33") != 0); 770}]])], 771 [gl_cv_func_printf_positions=yes], 772 [gl_cv_func_printf_positions=no], 773 [ 774changequote(,)dnl 775 case "$host_os" in 776 netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*) 777 gl_cv_func_printf_positions="guessing no";; 778 beos*) gl_cv_func_printf_positions="guessing no";; 779 mingw* | pw*) gl_cv_func_printf_positions="guessing no";; 780 *) gl_cv_func_printf_positions="guessing yes";; 781 esac 782changequote([,])dnl 783 ]) 784 ]) 785]) 786 787dnl Test whether the *printf family of functions supports POSIX/XSI format 788dnl strings with the ' flag for grouping of decimal digits. (POSIX:2001) 789dnl Result is gl_cv_func_printf_flag_grouping. 790 791AC_DEFUN([gl_PRINTF_FLAG_GROUPING], 792[ 793 AC_REQUIRE([AC_PROG_CC]) 794 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 795 AC_CACHE_CHECK([whether printf supports the grouping flag], 796 [gl_cv_func_printf_flag_grouping], 797 [ 798 AC_RUN_IFELSE( 799 [AC_LANG_SOURCE([[ 800#include <stdio.h> 801#include <string.h> 802static char buf[100]; 803int main () 804{ 805 if (sprintf (buf, "%'d %d", 1234567, 99) < 0 806 || buf[strlen (buf) - 1] != '9') 807 return 1; 808 return 0; 809}]])], 810 [gl_cv_func_printf_flag_grouping=yes], 811 [gl_cv_func_printf_flag_grouping=no], 812 [ 813changequote(,)dnl 814 case "$host_os" in 815 cygwin*) gl_cv_func_printf_flag_grouping="guessing no";; 816 netbsd*) gl_cv_func_printf_flag_grouping="guessing no";; 817 mingw* | pw*) gl_cv_func_printf_flag_grouping="guessing no";; 818 *) gl_cv_func_printf_flag_grouping="guessing yes";; 819 esac 820changequote([,])dnl 821 ]) 822 ]) 823]) 824 825dnl Test whether the *printf family of functions supports the - flag correctly. 826dnl (ISO C99.) See 827dnl <http://lists.gnu.org/archive/html/bug-coreutils/2008-02/msg00035.html> 828dnl Result is gl_cv_func_printf_flag_leftadjust. 829 830AC_DEFUN([gl_PRINTF_FLAG_LEFTADJUST], 831[ 832 AC_REQUIRE([AC_PROG_CC]) 833 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 834 AC_CACHE_CHECK([whether printf supports the left-adjust flag correctly], 835 [gl_cv_func_printf_flag_leftadjust], 836 [ 837 AC_RUN_IFELSE( 838 [AC_LANG_SOURCE([[ 839#include <stdio.h> 840#include <string.h> 841static char buf[100]; 842int main () 843{ 844 /* Check that a '-' flag is not annihilated by a negative width. */ 845 if (sprintf (buf, "a%-*sc", -3, "b") < 0 846 || strcmp (buf, "ab c") != 0) 847 return 1; 848 return 0; 849}]])], 850 [gl_cv_func_printf_flag_leftadjust=yes], 851 [gl_cv_func_printf_flag_leftadjust=no], 852 [ 853changequote(,)dnl 854 case "$host_os" in 855 # Guess yes on HP-UX 11. 856 hpux11*) gl_cv_func_printf_flag_leftadjust="guessing yes";; 857 # Guess no on HP-UX 10 and older. 858 hpux*) gl_cv_func_printf_flag_leftadjust="guessing no";; 859 # Guess yes otherwise. 860 *) gl_cv_func_printf_flag_leftadjust="guessing yes";; 861 esac 862changequote([,])dnl 863 ]) 864 ]) 865]) 866 867dnl Test whether the *printf family of functions supports padding of non-finite 868dnl values with the 0 flag correctly. (ISO C99 + TC1 + TC2.) See 869dnl <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> 870dnl Result is gl_cv_func_printf_flag_zero. 871 872AC_DEFUN([gl_PRINTF_FLAG_ZERO], 873[ 874 AC_REQUIRE([AC_PROG_CC]) 875 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 876 AC_CACHE_CHECK([whether printf supports the zero flag correctly], 877 [gl_cv_func_printf_flag_zero], 878 [ 879 AC_RUN_IFELSE( 880 [AC_LANG_SOURCE([[ 881#include <stdio.h> 882#include <string.h> 883static char buf[100]; 884static double zero = 0.0; 885int main () 886{ 887 if (sprintf (buf, "%010f", 1.0 / zero, 33, 44, 55) < 0 888 || (strcmp (buf, " inf") != 0 889 && strcmp (buf, " infinity") != 0)) 890 return 1; 891 return 0; 892}]])], 893 [gl_cv_func_printf_flag_zero=yes], 894 [gl_cv_func_printf_flag_zero=no], 895 [ 896changequote(,)dnl 897 case "$host_os" in 898 # Guess yes on glibc systems. 899 *-gnu*) gl_cv_func_printf_flag_zero="guessing yes";; 900 # Guess yes on BeOS. 901 beos*) gl_cv_func_printf_flag_zero="guessing yes";; 902 # If we don't know, assume the worst. 903 *) gl_cv_func_printf_flag_zero="guessing no";; 904 esac 905changequote([,])dnl 906 ]) 907 ]) 908]) 909 910dnl Test whether the *printf family of functions supports large precisions. 911dnl On mingw, precisions larger than 512 are treated like 512, in integer, 912dnl floating-point or pointer output. On Solaris 10/x86, precisions larger 913dnl than 510 in floating-point output crash the program. On Solaris 10/SPARC, 914dnl precisions larger than 510 in floating-point output yield wrong results. 915dnl On AIX 7.1, precisions larger than 998 in floating-point output yield 916dnl wrong results. On BeOS, precisions larger than 1044 crash the program. 917dnl Result is gl_cv_func_printf_precision. 918 919AC_DEFUN([gl_PRINTF_PRECISION], 920[ 921 AC_REQUIRE([AC_PROG_CC]) 922 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 923 AC_CACHE_CHECK([whether printf supports large precisions], 924 [gl_cv_func_printf_precision], 925 [ 926 AC_RUN_IFELSE( 927 [AC_LANG_SOURCE([[ 928#include <stdio.h> 929#include <string.h> 930static char buf[5000]; 931int main () 932{ 933 int result = 0; 934#ifdef __BEOS__ 935 /* On BeOS, this would crash and show a dialog box. Avoid the crash. */ 936 return 1; 937#endif 938 if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3) 939 result |= 1; 940 if (sprintf (buf, "%.4000f %d", 1.0, 33, 44) < 4000 + 5) 941 result |= 2; 942 if (sprintf (buf, "%.511f %d", 1.0, 33, 44) < 511 + 5 943 || buf[0] != '1') 944 result |= 4; 945 if (sprintf (buf, "%.999f %d", 1.0, 33, 44) < 999 + 5 946 || buf[0] != '1') 947 result |= 4; 948 return result; 949}]])], 950 [gl_cv_func_printf_precision=yes], 951 [gl_cv_func_printf_precision=no], 952 [ 953changequote(,)dnl 954 case "$host_os" in 955 # Guess no only on Solaris, native Windows, and BeOS systems. 956 solaris*) gl_cv_func_printf_precision="guessing no" ;; 957 mingw* | pw*) gl_cv_func_printf_precision="guessing no" ;; 958 beos*) gl_cv_func_printf_precision="guessing no" ;; 959 *) gl_cv_func_printf_precision="guessing yes" ;; 960 esac 961changequote([,])dnl 962 ]) 963 ]) 964]) 965 966dnl Test whether the *printf family of functions recovers gracefully in case 967dnl of an out-of-memory condition, or whether it crashes the entire program. 968dnl Result is gl_cv_func_printf_enomem. 969 970AC_DEFUN([gl_PRINTF_ENOMEM], 971[ 972 AC_REQUIRE([AC_PROG_CC]) 973 AC_REQUIRE([gl_MULTIARCH]) 974 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 975 AC_CACHE_CHECK([whether printf survives out-of-memory conditions], 976 [gl_cv_func_printf_enomem], 977 [ 978 gl_cv_func_printf_enomem="guessing no" 979 if test "$cross_compiling" = no; then 980 if test $APPLE_UNIVERSAL_BUILD = 0; then 981 AC_LANG_CONFTEST([AC_LANG_SOURCE([ 982]GL_NOCRASH[ 983changequote(,)dnl 984#include <stdio.h> 985#include <sys/types.h> 986#include <sys/time.h> 987#include <sys/resource.h> 988#include <errno.h> 989int main() 990{ 991 struct rlimit limit; 992 int ret; 993 nocrash_init (); 994 /* Some printf implementations allocate temporary space with malloc. */ 995 /* On BSD systems, malloc() is limited by RLIMIT_DATA. */ 996#ifdef RLIMIT_DATA 997 if (getrlimit (RLIMIT_DATA, &limit) < 0) 998 return 77; 999 if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) 1000 limit.rlim_max = 5000000; 1001 limit.rlim_cur = limit.rlim_max; 1002 if (setrlimit (RLIMIT_DATA, &limit) < 0) 1003 return 77; 1004#endif 1005 /* On Linux systems, malloc() is limited by RLIMIT_AS. */ 1006#ifdef RLIMIT_AS 1007 if (getrlimit (RLIMIT_AS, &limit) < 0) 1008 return 77; 1009 if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) 1010 limit.rlim_max = 5000000; 1011 limit.rlim_cur = limit.rlim_max; 1012 if (setrlimit (RLIMIT_AS, &limit) < 0) 1013 return 77; 1014#endif 1015 /* Some printf implementations allocate temporary space on the stack. */ 1016#ifdef RLIMIT_STACK 1017 if (getrlimit (RLIMIT_STACK, &limit) < 0) 1018 return 77; 1019 if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) 1020 limit.rlim_max = 5000000; 1021 limit.rlim_cur = limit.rlim_max; 1022 if (setrlimit (RLIMIT_STACK, &limit) < 0) 1023 return 77; 1024#endif 1025 ret = printf ("%.5000000f", 1.0); 1026 return !(ret == 5000002 || (ret < 0 && errno == ENOMEM)); 1027} 1028changequote([,])dnl 1029 ])]) 1030 if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then 1031 (./conftest 2>&AS_MESSAGE_LOG_FD 1032 result=$? 1033 _AS_ECHO_LOG([\$? = $result]) 1034 if test $result != 0 && test $result != 77; then result=1; fi 1035 exit $result 1036 ) >/dev/null 2>/dev/null 1037 case $? in 1038 0) gl_cv_func_printf_enomem="yes" ;; 1039 77) gl_cv_func_printf_enomem="guessing no" ;; 1040 *) gl_cv_func_printf_enomem="no" ;; 1041 esac 1042 else 1043 gl_cv_func_printf_enomem="guessing no" 1044 fi 1045 rm -fr conftest* 1046 else 1047 dnl A universal build on Apple Mac OS X platforms. 1048 dnl The result would be 'no' in 32-bit mode and 'yes' in 64-bit mode. 1049 dnl But we need a configuration result that is valid in both modes. 1050 gl_cv_func_printf_enomem="guessing no" 1051 fi 1052 fi 1053 if test "$gl_cv_func_printf_enomem" = "guessing no"; then 1054changequote(,)dnl 1055 case "$host_os" in 1056 # Guess yes on glibc systems. 1057 *-gnu*) gl_cv_func_printf_enomem="guessing yes";; 1058 # Guess yes on Solaris. 1059 solaris*) gl_cv_func_printf_enomem="guessing yes";; 1060 # Guess yes on AIX. 1061 aix*) gl_cv_func_printf_enomem="guessing yes";; 1062 # Guess yes on HP-UX/hppa. 1063 hpux*) case "$host_cpu" in 1064 hppa*) gl_cv_func_printf_enomem="guessing yes";; 1065 *) gl_cv_func_printf_enomem="guessing no";; 1066 esac 1067 ;; 1068 # Guess yes on IRIX. 1069 irix*) gl_cv_func_printf_enomem="guessing yes";; 1070 # Guess yes on OSF/1. 1071 osf*) gl_cv_func_printf_enomem="guessing yes";; 1072 # Guess yes on BeOS. 1073 beos*) gl_cv_func_printf_enomem="guessing yes";; 1074 # Guess yes on Haiku. 1075 haiku*) gl_cv_func_printf_enomem="guessing yes";; 1076 # If we don't know, assume the worst. 1077 *) gl_cv_func_printf_enomem="guessing no";; 1078 esac 1079changequote([,])dnl 1080 fi 1081 ]) 1082]) 1083 1084dnl Test whether the snprintf function exists. (ISO C99, POSIX:2001) 1085dnl Result is ac_cv_func_snprintf. 1086 1087AC_DEFUN([gl_SNPRINTF_PRESENCE], 1088[ 1089 AC_CHECK_FUNCS_ONCE([snprintf]) 1090]) 1091 1092dnl Test whether the string produced by the snprintf function is always NUL 1093dnl terminated. (ISO C99, POSIX:2001) 1094dnl Result is gl_cv_func_snprintf_truncation_c99. 1095 1096AC_DEFUN([gl_SNPRINTF_TRUNCATION_C99], 1097[ 1098 AC_REQUIRE([AC_PROG_CC]) 1099 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 1100 AC_REQUIRE([gl_SNPRINTF_PRESENCE]) 1101 AC_CACHE_CHECK([whether snprintf truncates the result as in C99], 1102 [gl_cv_func_snprintf_truncation_c99], 1103 [ 1104 AC_RUN_IFELSE( 1105 [AC_LANG_SOURCE([[ 1106#include <stdio.h> 1107#include <string.h> 1108#if HAVE_SNPRINTF 1109# define my_snprintf snprintf 1110#else 1111# include <stdarg.h> 1112static int my_snprintf (char *buf, int size, const char *format, ...) 1113{ 1114 va_list args; 1115 int ret; 1116 va_start (args, format); 1117 ret = vsnprintf (buf, size, format, args); 1118 va_end (args); 1119 return ret; 1120} 1121#endif 1122static char buf[100]; 1123int main () 1124{ 1125 strcpy (buf, "ABCDEF"); 1126 my_snprintf (buf, 3, "%d %d", 4567, 89); 1127 if (memcmp (buf, "45\0DEF", 6) != 0) 1128 return 1; 1129 return 0; 1130}]])], 1131 [gl_cv_func_snprintf_truncation_c99=yes], 1132 [gl_cv_func_snprintf_truncation_c99=no], 1133 [ 1134changequote(,)dnl 1135 case "$host_os" in 1136 # Guess yes on glibc systems. 1137 *-gnu*) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1138 # Guess yes on FreeBSD >= 5. 1139 freebsd[1-4]*) gl_cv_func_snprintf_truncation_c99="guessing no";; 1140 freebsd* | kfreebsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1141 # Guess yes on Mac OS X >= 10.3. 1142 darwin[1-6].*) gl_cv_func_snprintf_truncation_c99="guessing no";; 1143 darwin*) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1144 # Guess yes on OpenBSD >= 3.9. 1145 openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*) 1146 gl_cv_func_snprintf_truncation_c99="guessing no";; 1147 openbsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1148 # Guess yes on Solaris >= 2.6. 1149 solaris2.[0-5] | solaris2.[0-5].*) 1150 gl_cv_func_snprintf_truncation_c99="guessing no";; 1151 solaris*) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1152 # Guess yes on AIX >= 4. 1153 aix[1-3]*) gl_cv_func_snprintf_truncation_c99="guessing no";; 1154 aix*) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1155 # Guess yes on HP-UX >= 11. 1156 hpux[7-9]* | hpux10*) gl_cv_func_snprintf_truncation_c99="guessing no";; 1157 hpux*) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1158 # Guess yes on IRIX >= 6.5. 1159 irix6.5) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1160 # Guess yes on OSF/1 >= 5. 1161 osf[3-4]*) gl_cv_func_snprintf_truncation_c99="guessing no";; 1162 osf*) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1163 # Guess yes on NetBSD >= 3. 1164 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) 1165 gl_cv_func_snprintf_truncation_c99="guessing no";; 1166 netbsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1167 # Guess yes on BeOS. 1168 beos*) gl_cv_func_snprintf_truncation_c99="guessing yes";; 1169 # If we don't know, assume the worst. 1170 *) gl_cv_func_snprintf_truncation_c99="guessing no";; 1171 esac 1172changequote([,])dnl 1173 ]) 1174 ]) 1175]) 1176 1177dnl Test whether the return value of the snprintf function is the number 1178dnl of bytes (excluding the terminating NUL) that would have been produced 1179dnl if the buffer had been large enough. (ISO C99, POSIX:2001) 1180dnl For example, this test program fails on IRIX 6.5: 1181dnl --------------------------------------------------------------------- 1182dnl #include <stdio.h> 1183dnl int main() 1184dnl { 1185dnl static char buf[8]; 1186dnl int retval = snprintf (buf, 3, "%d", 12345); 1187dnl return retval >= 0 && retval < 3; 1188dnl } 1189dnl --------------------------------------------------------------------- 1190dnl Result is gl_cv_func_snprintf_retval_c99. 1191 1192AC_DEFUN_ONCE([gl_SNPRINTF_RETVAL_C99], 1193[ 1194 AC_REQUIRE([AC_PROG_CC]) 1195 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 1196 AC_REQUIRE([gl_SNPRINTF_PRESENCE]) 1197 AC_CACHE_CHECK([whether snprintf returns a byte count as in C99], 1198 [gl_cv_func_snprintf_retval_c99], 1199 [ 1200 AC_RUN_IFELSE( 1201 [AC_LANG_SOURCE([[ 1202#include <stdio.h> 1203#include <string.h> 1204#if HAVE_SNPRINTF 1205# define my_snprintf snprintf 1206#else 1207# include <stdarg.h> 1208static int my_snprintf (char *buf, int size, const char *format, ...) 1209{ 1210 va_list args; 1211 int ret; 1212 va_start (args, format); 1213 ret = vsnprintf (buf, size, format, args); 1214 va_end (args); 1215 return ret; 1216} 1217#endif 1218static char buf[100]; 1219int main () 1220{ 1221 strcpy (buf, "ABCDEF"); 1222 if (my_snprintf (buf, 3, "%d %d", 4567, 89) != 7) 1223 return 1; 1224 if (my_snprintf (buf, 0, "%d %d", 4567, 89) != 7) 1225 return 2; 1226 if (my_snprintf (NULL, 0, "%d %d", 4567, 89) != 7) 1227 return 3; 1228 return 0; 1229}]])], 1230 [gl_cv_func_snprintf_retval_c99=yes], 1231 [gl_cv_func_snprintf_retval_c99=no], 1232 [ 1233changequote(,)dnl 1234 case "$host_os" in 1235 # Guess yes on glibc systems. 1236 *-gnu*) gl_cv_func_snprintf_retval_c99="guessing yes";; 1237 # Guess yes on FreeBSD >= 5. 1238 freebsd[1-4]*) gl_cv_func_snprintf_retval_c99="guessing no";; 1239 freebsd* | kfreebsd*) gl_cv_func_snprintf_retval_c99="guessing yes";; 1240 # Guess yes on Mac OS X >= 10.3. 1241 darwin[1-6].*) gl_cv_func_snprintf_retval_c99="guessing no";; 1242 darwin*) gl_cv_func_snprintf_retval_c99="guessing yes";; 1243 # Guess yes on OpenBSD >= 3.9. 1244 openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*) 1245 gl_cv_func_snprintf_retval_c99="guessing no";; 1246 openbsd*) gl_cv_func_snprintf_retval_c99="guessing yes";; 1247 # Guess yes on Solaris >= 2.10. 1248 solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";; 1249 solaris*) gl_cv_func_printf_sizes_c99="guessing no";; 1250 # Guess yes on AIX >= 4. 1251 aix[1-3]*) gl_cv_func_snprintf_retval_c99="guessing no";; 1252 aix*) gl_cv_func_snprintf_retval_c99="guessing yes";; 1253 # Guess yes on NetBSD >= 3. 1254 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) 1255 gl_cv_func_snprintf_retval_c99="guessing no";; 1256 netbsd*) gl_cv_func_snprintf_retval_c99="guessing yes";; 1257 # Guess yes on BeOS. 1258 beos*) gl_cv_func_snprintf_retval_c99="guessing yes";; 1259 # If we don't know, assume the worst. 1260 *) gl_cv_func_snprintf_retval_c99="guessing no";; 1261 esac 1262changequote([,])dnl 1263 ]) 1264 ]) 1265]) 1266 1267dnl Test whether the snprintf function supports the %n format directive 1268dnl also in truncated portions of the format string. (ISO C99, POSIX:2001) 1269dnl Result is gl_cv_func_snprintf_directive_n. 1270 1271AC_DEFUN([gl_SNPRINTF_DIRECTIVE_N], 1272[ 1273 AC_REQUIRE([AC_PROG_CC]) 1274 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 1275 AC_REQUIRE([gl_SNPRINTF_PRESENCE]) 1276 AC_CACHE_CHECK([whether snprintf fully supports the 'n' directive], 1277 [gl_cv_func_snprintf_directive_n], 1278 [ 1279 AC_RUN_IFELSE( 1280 [AC_LANG_SOURCE([[ 1281#include <stdio.h> 1282#include <string.h> 1283#if HAVE_SNPRINTF 1284# define my_snprintf snprintf 1285#else 1286# include <stdarg.h> 1287static int my_snprintf (char *buf, int size, const char *format, ...) 1288{ 1289 va_list args; 1290 int ret; 1291 va_start (args, format); 1292 ret = vsnprintf (buf, size, format, args); 1293 va_end (args); 1294 return ret; 1295} 1296#endif 1297static char fmtstring[10]; 1298static char buf[100]; 1299int main () 1300{ 1301 int count = -1; 1302 /* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2) 1303 support %n in format strings in read-only memory but not in writable 1304 memory. */ 1305 strcpy (fmtstring, "%d %n"); 1306 my_snprintf (buf, 4, fmtstring, 12345, &count, 33, 44, 55); 1307 if (count != 6) 1308 return 1; 1309 return 0; 1310}]])], 1311 [gl_cv_func_snprintf_directive_n=yes], 1312 [gl_cv_func_snprintf_directive_n=no], 1313 [ 1314changequote(,)dnl 1315 case "$host_os" in 1316 # Guess yes on glibc systems. 1317 *-gnu*) gl_cv_func_snprintf_directive_n="guessing yes";; 1318 # Guess yes on FreeBSD >= 5. 1319 freebsd[1-4]*) gl_cv_func_snprintf_directive_n="guessing no";; 1320 freebsd* | kfreebsd*) gl_cv_func_snprintf_directive_n="guessing yes";; 1321 # Guess yes on Mac OS X >= 10.3. 1322 darwin[1-6].*) gl_cv_func_snprintf_directive_n="guessing no";; 1323 darwin*) gl_cv_func_snprintf_directive_n="guessing yes";; 1324 # Guess yes on Solaris >= 2.6. 1325 solaris2.[0-5] | solaris2.[0-5].*) 1326 gl_cv_func_snprintf_directive_n="guessing no";; 1327 solaris*) gl_cv_func_snprintf_directive_n="guessing yes";; 1328 # Guess yes on AIX >= 4. 1329 aix[1-3]*) gl_cv_func_snprintf_directive_n="guessing no";; 1330 aix*) gl_cv_func_snprintf_directive_n="guessing yes";; 1331 # Guess yes on IRIX >= 6.5. 1332 irix6.5) gl_cv_func_snprintf_directive_n="guessing yes";; 1333 # Guess yes on OSF/1 >= 5. 1334 osf[3-4]*) gl_cv_func_snprintf_directive_n="guessing no";; 1335 osf*) gl_cv_func_snprintf_directive_n="guessing yes";; 1336 # Guess yes on NetBSD >= 3. 1337 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) 1338 gl_cv_func_snprintf_directive_n="guessing no";; 1339 netbsd*) gl_cv_func_snprintf_directive_n="guessing yes";; 1340 # Guess yes on BeOS. 1341 beos*) gl_cv_func_snprintf_directive_n="guessing yes";; 1342 # If we don't know, assume the worst. 1343 *) gl_cv_func_snprintf_directive_n="guessing no";; 1344 esac 1345changequote([,])dnl 1346 ]) 1347 ]) 1348]) 1349 1350dnl Test whether the snprintf function, when passed a size = 1, writes any 1351dnl output without bounds in this case, behaving like sprintf. This is the 1352dnl case on Linux libc5. 1353dnl Result is gl_cv_func_snprintf_size1. 1354 1355AC_DEFUN([gl_SNPRINTF_SIZE1], 1356[ 1357 AC_REQUIRE([AC_PROG_CC]) 1358 AC_REQUIRE([gl_SNPRINTF_PRESENCE]) 1359 AC_CACHE_CHECK([whether snprintf respects a size of 1], 1360 [gl_cv_func_snprintf_size1], 1361 [ 1362 AC_RUN_IFELSE( 1363 [AC_LANG_SOURCE([[ 1364#include <stdio.h> 1365#if HAVE_SNPRINTF 1366# define my_snprintf snprintf 1367#else 1368# include <stdarg.h> 1369static int my_snprintf (char *buf, int size, const char *format, ...) 1370{ 1371 va_list args; 1372 int ret; 1373 va_start (args, format); 1374 ret = vsnprintf (buf, size, format, args); 1375 va_end (args); 1376 return ret; 1377} 1378#endif 1379int main() 1380{ 1381 static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; 1382 my_snprintf (buf, 1, "%d", 12345); 1383 return buf[1] != 'E'; 1384}]])], 1385 [gl_cv_func_snprintf_size1=yes], 1386 [gl_cv_func_snprintf_size1=no], 1387 [gl_cv_func_snprintf_size1="guessing yes"]) 1388 ]) 1389]) 1390 1391dnl Test whether the vsnprintf function, when passed a zero size, produces no 1392dnl output. (ISO C99, POSIX:2001) 1393dnl For example, snprintf nevertheless writes a NUL byte in this case 1394dnl on OSF/1 5.1: 1395dnl --------------------------------------------------------------------- 1396dnl #include <stdio.h> 1397dnl int main() 1398dnl { 1399dnl static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; 1400dnl snprintf (buf, 0, "%d", 12345); 1401dnl return buf[0] != 'D'; 1402dnl } 1403dnl --------------------------------------------------------------------- 1404dnl And vsnprintf writes any output without bounds in this case, behaving like 1405dnl vsprintf, on HP-UX 11 and OSF/1 5.1: 1406dnl --------------------------------------------------------------------- 1407dnl #include <stdarg.h> 1408dnl #include <stdio.h> 1409dnl static int my_snprintf (char *buf, int size, const char *format, ...) 1410dnl { 1411dnl va_list args; 1412dnl int ret; 1413dnl va_start (args, format); 1414dnl ret = vsnprintf (buf, size, format, args); 1415dnl va_end (args); 1416dnl return ret; 1417dnl } 1418dnl int main() 1419dnl { 1420dnl static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; 1421dnl my_snprintf (buf, 0, "%d", 12345); 1422dnl return buf[0] != 'D'; 1423dnl } 1424dnl --------------------------------------------------------------------- 1425dnl Result is gl_cv_func_vsnprintf_zerosize_c99. 1426 1427AC_DEFUN([gl_VSNPRINTF_ZEROSIZE_C99], 1428[ 1429 AC_REQUIRE([AC_PROG_CC]) 1430 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 1431 AC_CACHE_CHECK([whether vsnprintf respects a zero size as in C99], 1432 [gl_cv_func_vsnprintf_zerosize_c99], 1433 [ 1434 AC_RUN_IFELSE( 1435 [AC_LANG_SOURCE([[ 1436#include <stdarg.h> 1437#include <stdio.h> 1438static int my_snprintf (char *buf, int size, const char *format, ...) 1439{ 1440 va_list args; 1441 int ret; 1442 va_start (args, format); 1443 ret = vsnprintf (buf, size, format, args); 1444 va_end (args); 1445 return ret; 1446} 1447int main() 1448{ 1449 static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; 1450 my_snprintf (buf, 0, "%d", 12345); 1451 return buf[0] != 'D'; 1452}]])], 1453 [gl_cv_func_vsnprintf_zerosize_c99=yes], 1454 [gl_cv_func_vsnprintf_zerosize_c99=no], 1455 [ 1456changequote(,)dnl 1457 case "$host_os" in 1458 # Guess yes on glibc systems. 1459 *-gnu*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; 1460 # Guess yes on FreeBSD >= 5. 1461 freebsd[1-4]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";; 1462 freebsd* | kfreebsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; 1463 # Guess yes on Mac OS X >= 10.3. 1464 darwin[1-6].*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";; 1465 darwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; 1466 # Guess yes on Cygwin. 1467 cygwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; 1468 # Guess yes on Solaris >= 2.6. 1469 solaris2.[0-5] | solaris2.[0-5].*) 1470 gl_cv_func_vsnprintf_zerosize_c99="guessing no";; 1471 solaris*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; 1472 # Guess yes on AIX >= 4. 1473 aix[1-3]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";; 1474 aix*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; 1475 # Guess yes on IRIX >= 6.5. 1476 irix6.5) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; 1477 # Guess yes on NetBSD >= 3. 1478 netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) 1479 gl_cv_func_vsnprintf_zerosize_c99="guessing no";; 1480 netbsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; 1481 # Guess yes on BeOS. 1482 beos*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; 1483 # Guess yes on mingw. 1484 mingw* | pw*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; 1485 # If we don't know, assume the worst. 1486 *) gl_cv_func_vsnprintf_zerosize_c99="guessing no";; 1487 esac 1488changequote([,])dnl 1489 ]) 1490 ]) 1491]) 1492 1493dnl The results of these tests on various platforms are: 1494dnl 1495dnl 1 = gl_PRINTF_SIZES_C99 1496dnl 2 = gl_PRINTF_LONG_DOUBLE 1497dnl 3 = gl_PRINTF_INFINITE 1498dnl 4 = gl_PRINTF_INFINITE_LONG_DOUBLE 1499dnl 5 = gl_PRINTF_DIRECTIVE_A 1500dnl 6 = gl_PRINTF_DIRECTIVE_F 1501dnl 7 = gl_PRINTF_DIRECTIVE_N 1502dnl 8 = gl_PRINTF_DIRECTIVE_LS 1503dnl 9 = gl_PRINTF_POSITIONS 1504dnl 10 = gl_PRINTF_FLAG_GROUPING 1505dnl 11 = gl_PRINTF_FLAG_LEFTADJUST 1506dnl 12 = gl_PRINTF_FLAG_ZERO 1507dnl 13 = gl_PRINTF_PRECISION 1508dnl 14 = gl_PRINTF_ENOMEM 1509dnl 15 = gl_SNPRINTF_PRESENCE 1510dnl 16 = gl_SNPRINTF_TRUNCATION_C99 1511dnl 17 = gl_SNPRINTF_RETVAL_C99 1512dnl 18 = gl_SNPRINTF_DIRECTIVE_N 1513dnl 19 = gl_SNPRINTF_SIZE1 1514dnl 20 = gl_VSNPRINTF_ZEROSIZE_C99 1515dnl 1516dnl 1 = checking whether printf supports size specifiers as in C99... 1517dnl 2 = checking whether printf supports 'long double' arguments... 1518dnl 3 = checking whether printf supports infinite 'double' arguments... 1519dnl 4 = checking whether printf supports infinite 'long double' arguments... 1520dnl 5 = checking whether printf supports the 'a' and 'A' directives... 1521dnl 6 = checking whether printf supports the 'F' directive... 1522dnl 7 = checking whether printf supports the 'n' directive... 1523dnl 8 = checking whether printf supports the 'ls' directive... 1524dnl 9 = checking whether printf supports POSIX/XSI format strings with positions... 1525dnl 10 = checking whether printf supports the grouping flag... 1526dnl 11 = checking whether printf supports the left-adjust flag correctly... 1527dnl 12 = checking whether printf supports the zero flag correctly... 1528dnl 13 = checking whether printf supports large precisions... 1529dnl 14 = checking whether printf survives out-of-memory conditions... 1530dnl 15 = checking for snprintf... 1531dnl 16 = checking whether snprintf truncates the result as in C99... 1532dnl 17 = checking whether snprintf returns a byte count as in C99... 1533dnl 18 = checking whether snprintf fully supports the 'n' directive... 1534dnl 19 = checking whether snprintf respects a size of 1... 1535dnl 20 = checking whether vsnprintf respects a zero size as in C99... 1536dnl 1537dnl . = yes, # = no. 1538dnl 1539dnl 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1540dnl glibc 2.5 . . . . . . . . . . . . . . . . . . . . 1541dnl glibc 2.3.6 . . . . # . . . . . . . . . . . . . . . 1542dnl FreeBSD 5.4, 6.1 . . . . # . . . . . . # . # . . . . . . 1543dnl Mac OS X 10.5.8 . . . # # . . . . . . # . . . . . . . . 1544dnl Mac OS X 10.3.9 . . . . # . . . . . . # . # . . . . . . 1545dnl OpenBSD 3.9, 4.0 . . # # # # . # . # . # . # . . . . . . 1546dnl Cygwin 1.7.0 (2009) . . . # . . . ? . . . . . ? . . . . . . 1547dnl Cygwin 1.5.25 (2008) . . . # # . . # . . . . . # . . . . . . 1548dnl Cygwin 1.5.19 (2006) # . . # # # . # . # . # # # . . . . . . 1549dnl Solaris 11 2011-11 . . # # # . . # . . . # . . . . . . . . 1550dnl Solaris 10 . . # # # . . # . . . # # . . . . . . . 1551dnl Solaris 2.6 ... 9 # . # # # # . # . . . # # . . . # . . . 1552dnl Solaris 2.5.1 # . # # # # . # . . . # . . # # # # # # 1553dnl AIX 7.1 . . # # # . . . . . . # # . . . . . . . 1554dnl AIX 5.2 . . # # # . . . . . . # . . . . . . . . 1555dnl AIX 4.3.2, 5.1 # . # # # # . . . . . # . . . . # . . . 1556dnl HP-UX 11.31 . . . . # . . . . . . # . . . . # # . . 1557dnl HP-UX 11.{00,11,23} # . . . # # . . . . . # . . . . # # . # 1558dnl HP-UX 10.20 # . # . # # . ? . . # # . . . . # # ? # 1559dnl IRIX 6.5 # . # # # # . # . . . # . . . . # . . . 1560dnl OSF/1 5.1 # . # # # # . . . . . # . . . . # . . # 1561dnl OSF/1 4.0d # . # # # # . . . . . # . . # # # # # # 1562dnl NetBSD 5.0 . . . # # . . . . . . # . # . . . . . . 1563dnl NetBSD 4.0 . ? ? ? ? ? . ? . ? ? ? ? ? . . . ? ? ? 1564dnl NetBSD 3.0 . . . . # # . ? # # ? # . # . . . . . . 1565dnl Haiku . . . # # # . # . . . . . ? . . ? . . . 1566dnl BeOS # # . # # # . ? # . ? . # ? . . ? . . . 1567dnl old mingw / msvcrt # # # # # # . . # # . # # ? . # # # . . 1568dnl MSVC 9 # # # # # # # . # # . # # ? # # # # . . 1569dnl mingw 2009-2011 . # . # . . . . # # . . . ? . . . . . . 1570dnl mingw-w64 2011 # # # # # # . . # # . # # ? . # # # . . 1571