| # printf.m4 serial 50 |
| dnl Copyright (C) 2003, 2007-2013 Free Software Foundation, Inc. |
| dnl This file is free software; the Free Software Foundation |
| dnl gives unlimited permission to copy and/or distribute it, |
| dnl with or without modifications, as long as this notice is preserved. |
| |
| dnl Test whether the *printf family of functions supports the 'j', 'z', 't', |
| dnl 'L' size specifiers. (ISO C99, POSIX:2001) |
| dnl Result is gl_cv_func_printf_sizes_c99. |
| |
| AC_DEFUN([gl_PRINTF_SIZES_C99], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([gl_AC_HEADER_STDINT_H]) |
| AC_REQUIRE([gl_AC_HEADER_INTTYPES_H]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports size specifiers as in C99], |
| [gl_cv_func_printf_sizes_c99], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/types.h> |
| #if HAVE_STDINT_H_WITH_UINTMAX |
| # include <stdint.h> |
| #endif |
| #if HAVE_INTTYPES_H_WITH_UINTMAX |
| # include <inttypes.h> |
| #endif |
| static char buf[100]; |
| int main () |
| { |
| int result = 0; |
| #if HAVE_STDINT_H_WITH_UINTMAX || HAVE_INTTYPES_H_WITH_UINTMAX |
| buf[0] = '\0'; |
| if (sprintf (buf, "%ju %d", (uintmax_t) 12345671, 33, 44, 55) < 0 |
| || strcmp (buf, "12345671 33") != 0) |
| result |= 1; |
| #endif |
| buf[0] = '\0'; |
| if (sprintf (buf, "%zu %d", (size_t) 12345672, 33, 44, 55) < 0 |
| || strcmp (buf, "12345672 33") != 0) |
| result |= 2; |
| buf[0] = '\0'; |
| if (sprintf (buf, "%tu %d", (ptrdiff_t) 12345673, 33, 44, 55) < 0 |
| || strcmp (buf, "12345673 33") != 0) |
| result |= 4; |
| buf[0] = '\0'; |
| if (sprintf (buf, "%Lg %d", (long double) 1.5, 33, 44, 55) < 0 |
| || strcmp (buf, "1.5 33") != 0) |
| result |= 8; |
| return result; |
| }]])], |
| [gl_cv_func_printf_sizes_c99=yes], |
| [gl_cv_func_printf_sizes_c99=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_printf_sizes_c99="guessing yes";; |
| # Guess yes on FreeBSD >= 5. |
| freebsd[1-4]*) gl_cv_func_printf_sizes_c99="guessing no";; |
| freebsd* | kfreebsd*) gl_cv_func_printf_sizes_c99="guessing yes";; |
| # Guess yes on Mac OS X >= 10.3. |
| darwin[1-6].*) gl_cv_func_printf_sizes_c99="guessing no";; |
| darwin*) gl_cv_func_printf_sizes_c99="guessing yes";; |
| # Guess yes on OpenBSD >= 3.9. |
| openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*) |
| gl_cv_func_printf_sizes_c99="guessing no";; |
| openbsd*) gl_cv_func_printf_sizes_c99="guessing yes";; |
| # Guess yes on Solaris >= 2.10. |
| solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";; |
| solaris*) gl_cv_func_printf_sizes_c99="guessing no";; |
| # Guess yes on NetBSD >= 3. |
| netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) |
| gl_cv_func_printf_sizes_c99="guessing no";; |
| netbsd*) gl_cv_func_printf_sizes_c99="guessing yes";; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_printf_sizes_c99="guessing no";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports 'long double' |
| dnl arguments together with the 'L' size specifier. (ISO C99, POSIX:2001) |
| dnl Result is gl_cv_func_printf_long_double. |
| |
| AC_DEFUN([gl_PRINTF_LONG_DOUBLE], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports 'long double' arguments], |
| [gl_cv_func_printf_long_double], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| static char buf[10000]; |
| int main () |
| { |
| int result = 0; |
| buf[0] = '\0'; |
| if (sprintf (buf, "%Lf %d", 1.75L, 33, 44, 55) < 0 |
| || strcmp (buf, "1.750000 33") != 0) |
| result |= 1; |
| buf[0] = '\0'; |
| if (sprintf (buf, "%Le %d", 1.75L, 33, 44, 55) < 0 |
| || strcmp (buf, "1.750000e+00 33") != 0) |
| result |= 2; |
| buf[0] = '\0'; |
| if (sprintf (buf, "%Lg %d", 1.75L, 33, 44, 55) < 0 |
| || strcmp (buf, "1.75 33") != 0) |
| result |= 4; |
| return result; |
| }]])], |
| [gl_cv_func_printf_long_double=yes], |
| [gl_cv_func_printf_long_double=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| beos*) gl_cv_func_printf_long_double="guessing no";; |
| mingw* | pw*) gl_cv_func_printf_long_double="guessing no";; |
| *) gl_cv_func_printf_long_double="guessing yes";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports infinite and NaN |
| dnl 'double' arguments and negative zero arguments in the %f, %e, %g |
| dnl directives. (ISO C99, POSIX:2001) |
| dnl Result is gl_cv_func_printf_infinite. |
| |
| AC_DEFUN([gl_PRINTF_INFINITE], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports infinite 'double' arguments], |
| [gl_cv_func_printf_infinite], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| static int |
| strisnan (const char *string, size_t start_index, size_t end_index) |
| { |
| if (start_index < end_index) |
| { |
| if (string[start_index] == '-') |
| start_index++; |
| if (start_index + 3 <= end_index |
| && memcmp (string + start_index, "nan", 3) == 0) |
| { |
| start_index += 3; |
| if (start_index == end_index |
| || (string[start_index] == '(' && string[end_index - 1] == ')')) |
| return 1; |
| } |
| } |
| return 0; |
| } |
| static int |
| have_minus_zero () |
| { |
| static double plus_zero = 0.0; |
| double minus_zero = - plus_zero; |
| return memcmp (&plus_zero, &minus_zero, sizeof (double)) != 0; |
| } |
| static char buf[10000]; |
| static double zero = 0.0; |
| int main () |
| { |
| int result = 0; |
| if (sprintf (buf, "%f", 1.0 / zero) < 0 |
| || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) |
| result |= 1; |
| if (sprintf (buf, "%f", -1.0 / zero) < 0 |
| || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) |
| result |= 1; |
| if (sprintf (buf, "%f", zero / zero) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 2; |
| if (sprintf (buf, "%e", 1.0 / zero) < 0 |
| || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) |
| result |= 4; |
| if (sprintf (buf, "%e", -1.0 / zero) < 0 |
| || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) |
| result |= 4; |
| if (sprintf (buf, "%e", zero / zero) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 8; |
| if (sprintf (buf, "%g", 1.0 / zero) < 0 |
| || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) |
| result |= 16; |
| if (sprintf (buf, "%g", -1.0 / zero) < 0 |
| || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) |
| result |= 16; |
| if (sprintf (buf, "%g", zero / zero) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 32; |
| /* This test fails on HP-UX 10.20. */ |
| if (have_minus_zero ()) |
| if (sprintf (buf, "%g", - zero) < 0 |
| || strcmp (buf, "-0") != 0) |
| result |= 64; |
| return result; |
| }]])], |
| [gl_cv_func_printf_infinite=yes], |
| [gl_cv_func_printf_infinite=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_printf_infinite="guessing yes";; |
| # Guess yes on FreeBSD >= 6. |
| freebsd[1-5]*) gl_cv_func_printf_infinite="guessing no";; |
| freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";; |
| # Guess yes on Mac OS X >= 10.3. |
| darwin[1-6].*) gl_cv_func_printf_infinite="guessing no";; |
| darwin*) gl_cv_func_printf_infinite="guessing yes";; |
| # Guess yes on HP-UX >= 11. |
| hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite="guessing no";; |
| hpux*) gl_cv_func_printf_infinite="guessing yes";; |
| # Guess yes on NetBSD >= 3. |
| netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) |
| gl_cv_func_printf_infinite="guessing no";; |
| netbsd*) gl_cv_func_printf_infinite="guessing yes";; |
| # Guess yes on BeOS. |
| beos*) gl_cv_func_printf_infinite="guessing yes";; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_printf_infinite="guessing no";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports infinite and NaN |
| dnl 'long double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001) |
| dnl Result is gl_cv_func_printf_infinite_long_double. |
| |
| AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE], |
| [ |
| AC_REQUIRE([gl_PRINTF_LONG_DOUBLE]) |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([gl_BIGENDIAN]) |
| AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| dnl The user can set or unset the variable gl_printf_safe to indicate |
| dnl that he wishes a safe handling of non-IEEE-754 'long double' values. |
| if test -n "$gl_printf_safe"; then |
| AC_DEFINE([CHECK_PRINTF_SAFE], [1], |
| [Define if you wish *printf() functions that have a safe handling of |
| non-IEEE-754 'long double' values.]) |
| fi |
| case "$gl_cv_func_printf_long_double" in |
| *yes) |
| AC_CACHE_CHECK([whether printf supports infinite 'long double' arguments], |
| [gl_cv_func_printf_infinite_long_double], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| ]GL_NOCRASH[ |
| #include <float.h> |
| #include <stdio.h> |
| #include <string.h> |
| static int |
| strisnan (const char *string, size_t start_index, size_t end_index) |
| { |
| if (start_index < end_index) |
| { |
| if (string[start_index] == '-') |
| start_index++; |
| if (start_index + 3 <= end_index |
| && memcmp (string + start_index, "nan", 3) == 0) |
| { |
| start_index += 3; |
| if (start_index == end_index |
| || (string[start_index] == '(' && string[end_index - 1] == ')')) |
| return 1; |
| } |
| } |
| return 0; |
| } |
| static char buf[10000]; |
| static long double zeroL = 0.0L; |
| int main () |
| { |
| int result = 0; |
| nocrash_init(); |
| if (sprintf (buf, "%Lf", 1.0L / zeroL) < 0 |
| || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) |
| result |= 1; |
| if (sprintf (buf, "%Lf", -1.0L / zeroL) < 0 |
| || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) |
| result |= 1; |
| if (sprintf (buf, "%Lf", zeroL / zeroL) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 1; |
| if (sprintf (buf, "%Le", 1.0L / zeroL) < 0 |
| || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) |
| result |= 1; |
| if (sprintf (buf, "%Le", -1.0L / zeroL) < 0 |
| || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) |
| result |= 1; |
| if (sprintf (buf, "%Le", zeroL / zeroL) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 1; |
| if (sprintf (buf, "%Lg", 1.0L / zeroL) < 0 |
| || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) |
| result |= 1; |
| if (sprintf (buf, "%Lg", -1.0L / zeroL) < 0 |
| || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) |
| result |= 1; |
| if (sprintf (buf, "%Lg", zeroL / zeroL) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 1; |
| #if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE |
| /* Representation of an 80-bit 'long double' as an initializer for a sequence |
| of 'unsigned int' words. */ |
| # ifdef WORDS_BIGENDIAN |
| # define LDBL80_WORDS(exponent,manthi,mantlo) \ |
| { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \ |
| ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \ |
| (unsigned int) (mantlo) << 16 \ |
| } |
| # else |
| # define LDBL80_WORDS(exponent,manthi,mantlo) \ |
| { mantlo, manthi, exponent } |
| # endif |
| { /* Quiet NaN. */ |
| static union { unsigned int word[4]; long double value; } x = |
| { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) }; |
| if (sprintf (buf, "%Lf", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 2; |
| if (sprintf (buf, "%Le", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 2; |
| if (sprintf (buf, "%Lg", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 2; |
| } |
| { |
| /* Signalling NaN. */ |
| static union { unsigned int word[4]; long double value; } x = |
| { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) }; |
| if (sprintf (buf, "%Lf", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 2; |
| if (sprintf (buf, "%Le", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 2; |
| if (sprintf (buf, "%Lg", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 2; |
| } |
| { /* Pseudo-NaN. */ |
| static union { unsigned int word[4]; long double value; } x = |
| { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) }; |
| if (sprintf (buf, "%Lf", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 4; |
| if (sprintf (buf, "%Le", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 4; |
| if (sprintf (buf, "%Lg", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 4; |
| } |
| { /* Pseudo-Infinity. */ |
| static union { unsigned int word[4]; long double value; } x = |
| { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) }; |
| if (sprintf (buf, "%Lf", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 8; |
| if (sprintf (buf, "%Le", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 8; |
| if (sprintf (buf, "%Lg", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 8; |
| } |
| { /* Pseudo-Zero. */ |
| static union { unsigned int word[4]; long double value; } x = |
| { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) }; |
| if (sprintf (buf, "%Lf", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 16; |
| if (sprintf (buf, "%Le", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 16; |
| if (sprintf (buf, "%Lg", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 16; |
| } |
| { /* Unnormalized number. */ |
| static union { unsigned int word[4]; long double value; } x = |
| { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) }; |
| if (sprintf (buf, "%Lf", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 32; |
| if (sprintf (buf, "%Le", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 32; |
| if (sprintf (buf, "%Lg", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 32; |
| } |
| { /* Pseudo-Denormal. */ |
| static union { unsigned int word[4]; long double value; } x = |
| { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) }; |
| if (sprintf (buf, "%Lf", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 64; |
| if (sprintf (buf, "%Le", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 64; |
| if (sprintf (buf, "%Lg", x.value) < 0 |
| || !strisnan (buf, 0, strlen (buf))) |
| result |= 64; |
| } |
| #endif |
| return result; |
| }]])], |
| [gl_cv_func_printf_infinite_long_double=yes], |
| [gl_cv_func_printf_infinite_long_double=no], |
| [ |
| changequote(,)dnl |
| case "$host_cpu" in |
| # Guess no on ia64, x86_64, i386. |
| ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";; |
| *) |
| case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_printf_infinite_long_double="guessing yes";; |
| # Guess yes on FreeBSD >= 6. |
| freebsd[1-5]*) gl_cv_func_printf_infinite_long_double="guessing no";; |
| freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";; |
| # Guess yes on HP-UX >= 11. |
| hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";; |
| hpux*) gl_cv_func_printf_infinite_long_double="guessing yes";; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_printf_infinite_long_double="guessing no";; |
| esac |
| ;; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ;; |
| *) |
| gl_cv_func_printf_infinite_long_double="irrelevant" |
| ;; |
| esac |
| ]) |
| |
| dnl Test whether the *printf family of functions supports the 'a' and 'A' |
| dnl conversion specifier for hexadecimal output of floating-point numbers. |
| dnl (ISO C99, POSIX:2001) |
| dnl Result is gl_cv_func_printf_directive_a. |
| |
| AC_DEFUN([gl_PRINTF_DIRECTIVE_A], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports the 'a' and 'A' directives], |
| [gl_cv_func_printf_directive_a], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| static char buf[100]; |
| static double zero = 0.0; |
| int main () |
| { |
| int result = 0; |
| if (sprintf (buf, "%a %d", 3.1416015625, 33, 44, 55) < 0 |
| || (strcmp (buf, "0x1.922p+1 33") != 0 |
| && strcmp (buf, "0x3.244p+0 33") != 0 |
| && strcmp (buf, "0x6.488p-1 33") != 0 |
| && strcmp (buf, "0xc.91p-2 33") != 0)) |
| result |= 1; |
| if (sprintf (buf, "%A %d", -3.1416015625, 33, 44, 55) < 0 |
| || (strcmp (buf, "-0X1.922P+1 33") != 0 |
| && strcmp (buf, "-0X3.244P+0 33") != 0 |
| && strcmp (buf, "-0X6.488P-1 33") != 0 |
| && strcmp (buf, "-0XC.91P-2 33") != 0)) |
| result |= 2; |
| /* This catches a FreeBSD 6.1 bug: it doesn't round. */ |
| if (sprintf (buf, "%.2a %d", 1.51, 33, 44, 55) < 0 |
| || (strcmp (buf, "0x1.83p+0 33") != 0 |
| && strcmp (buf, "0x3.05p-1 33") != 0 |
| && strcmp (buf, "0x6.0ap-2 33") != 0 |
| && strcmp (buf, "0xc.14p-3 33") != 0)) |
| result |= 4; |
| /* This catches a FreeBSD 6.1 bug. See |
| <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */ |
| if (sprintf (buf, "%010a %d", 1.0 / zero, 33, 44, 55) < 0 |
| || buf[0] == '0') |
| result |= 8; |
| /* This catches a Mac OS X 10.3.9 (Darwin 7.9) bug. */ |
| if (sprintf (buf, "%.1a", 1.999) < 0 |
| || (strcmp (buf, "0x1.0p+1") != 0 |
| && strcmp (buf, "0x2.0p+0") != 0 |
| && strcmp (buf, "0x4.0p-1") != 0 |
| && strcmp (buf, "0x8.0p-2") != 0)) |
| result |= 16; |
| /* This catches the same Mac OS X 10.3.9 (Darwin 7.9) bug and also a |
| glibc 2.4 bug <http://sourceware.org/bugzilla/show_bug.cgi?id=2908>. */ |
| if (sprintf (buf, "%.1La", 1.999L) < 0 |
| || (strcmp (buf, "0x1.0p+1") != 0 |
| && strcmp (buf, "0x2.0p+0") != 0 |
| && strcmp (buf, "0x4.0p-1") != 0 |
| && strcmp (buf, "0x8.0p-2") != 0)) |
| result |= 32; |
| return result; |
| }]])], |
| [gl_cv_func_printf_directive_a=yes], |
| [gl_cv_func_printf_directive_a=no], |
| [ |
| case "$host_os" in |
| # Guess yes on glibc >= 2.5 systems. |
| *-gnu*) |
| AC_EGREP_CPP([BZ2908], [ |
| #include <features.h> |
| #ifdef __GNU_LIBRARY__ |
| #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 5) || (__GLIBC__ > 2)) && !defined __UCLIBC__ |
| BZ2908 |
| #endif |
| #endif |
| ], |
| [gl_cv_func_printf_directive_a="guessing yes"], |
| [gl_cv_func_printf_directive_a="guessing no"]) |
| ;; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_printf_directive_a="guessing no";; |
| esac |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports the %F format |
| dnl directive. (ISO C99, POSIX:2001) |
| dnl Result is gl_cv_func_printf_directive_f. |
| |
| AC_DEFUN([gl_PRINTF_DIRECTIVE_F], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports the 'F' directive], |
| [gl_cv_func_printf_directive_f], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| static char buf[100]; |
| static double zero = 0.0; |
| int main () |
| { |
| int result = 0; |
| if (sprintf (buf, "%F %d", 1234567.0, 33, 44, 55) < 0 |
| || strcmp (buf, "1234567.000000 33") != 0) |
| result |= 1; |
| if (sprintf (buf, "%F", 1.0 / zero) < 0 |
| || (strcmp (buf, "INF") != 0 && strcmp (buf, "INFINITY") != 0)) |
| result |= 2; |
| /* This catches a Cygwin 1.5.x bug. */ |
| if (sprintf (buf, "%.F", 1234.0) < 0 |
| || strcmp (buf, "1234") != 0) |
| result |= 4; |
| return result; |
| }]])], |
| [gl_cv_func_printf_directive_f=yes], |
| [gl_cv_func_printf_directive_f=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_printf_directive_f="guessing yes";; |
| # Guess yes on FreeBSD >= 6. |
| freebsd[1-5]*) gl_cv_func_printf_directive_f="guessing no";; |
| freebsd* | kfreebsd*) gl_cv_func_printf_directive_f="guessing yes";; |
| # Guess yes on Mac OS X >= 10.3. |
| darwin[1-6].*) gl_cv_func_printf_directive_f="guessing no";; |
| darwin*) gl_cv_func_printf_directive_f="guessing yes";; |
| # Guess yes on Solaris >= 2.10. |
| solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";; |
| solaris*) gl_cv_func_printf_sizes_c99="guessing no";; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_printf_directive_f="guessing no";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports the %n format |
| dnl directive. (ISO C99, POSIX:2001) |
| dnl Result is gl_cv_func_printf_directive_n. |
| |
| AC_DEFUN([gl_PRINTF_DIRECTIVE_N], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports the 'n' directive], |
| [gl_cv_func_printf_directive_n], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #ifdef _MSC_VER |
| /* See page about "Parameter Validation" on msdn.microsoft.com. */ |
| static void cdecl |
| invalid_parameter_handler (const wchar_t *expression, |
| const wchar_t *function, |
| const wchar_t *file, unsigned int line, |
| uintptr_t dummy) |
| { |
| exit (1); |
| } |
| #endif |
| static char fmtstring[10]; |
| static char buf[100]; |
| int main () |
| { |
| int count = -1; |
| #ifdef _MSC_VER |
| _set_invalid_parameter_handler (invalid_parameter_handler); |
| #endif |
| /* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2) |
| support %n in format strings in read-only memory but not in writable |
| memory. */ |
| strcpy (fmtstring, "%d %n"); |
| if (sprintf (buf, fmtstring, 123, &count, 33, 44, 55) < 0 |
| || strcmp (buf, "123 ") != 0 |
| || count != 4) |
| return 1; |
| return 0; |
| }]])], |
| [gl_cv_func_printf_directive_n=yes], |
| [gl_cv_func_printf_directive_n=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| mingw*) gl_cv_func_printf_directive_n="guessing no";; |
| *) gl_cv_func_printf_directive_n="guessing yes";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports the %ls format |
| dnl directive and in particular, when a precision is specified, whether |
| dnl the functions stop converting the wide string argument when the number |
| dnl of bytes that have been produced by this conversion equals or exceeds |
| dnl the precision. |
| dnl Result is gl_cv_func_printf_directive_ls. |
| |
| AC_DEFUN([gl_PRINTF_DIRECTIVE_LS], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports the 'ls' directive], |
| [gl_cv_func_printf_directive_ls], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before |
| <wchar.h>. |
| BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be |
| included before <wchar.h>. */ |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <time.h> |
| #include <wchar.h> |
| #include <string.h> |
| int main () |
| { |
| int result = 0; |
| char buf[100]; |
| /* Test whether %ls works at all. |
| This test fails on OpenBSD 4.0, IRIX 6.5, Solaris 2.6, Haiku, but not on |
| Cygwin 1.5. */ |
| { |
| static const wchar_t wstring[] = { 'a', 'b', 'c', 0 }; |
| buf[0] = '\0'; |
| if (sprintf (buf, "%ls", wstring) < 0 |
| || strcmp (buf, "abc") != 0) |
| result |= 1; |
| } |
| /* This test fails on IRIX 6.5, Solaris 2.6, Cygwin 1.5, Haiku (with an |
| assertion failure inside libc), but not on OpenBSD 4.0. */ |
| { |
| static const wchar_t wstring[] = { 'a', 0 }; |
| buf[0] = '\0'; |
| if (sprintf (buf, "%ls", wstring) < 0 |
| || strcmp (buf, "a") != 0) |
| result |= 2; |
| } |
| /* Test whether precisions in %ls are supported as specified in ISO C 99 |
| section 7.19.6.1: |
| "If a precision is specified, no more than that many bytes are written |
| (including shift sequences, if any), and the array shall contain a |
| null wide character if, to equal the multibyte character sequence |
| length given by the precision, the function would need to access a |
| wide character one past the end of the array." |
| This test fails on Solaris 10. */ |
| { |
| static const wchar_t wstring[] = { 'a', 'b', (wchar_t) 0xfdfdfdfd, 0 }; |
| buf[0] = '\0'; |
| if (sprintf (buf, "%.2ls", wstring) < 0 |
| || strcmp (buf, "ab") != 0) |
| result |= 8; |
| } |
| return result; |
| }]])], |
| [gl_cv_func_printf_directive_ls=yes], |
| [gl_cv_func_printf_directive_ls=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| openbsd*) gl_cv_func_printf_directive_ls="guessing no";; |
| irix*) gl_cv_func_printf_directive_ls="guessing no";; |
| solaris*) gl_cv_func_printf_directive_ls="guessing no";; |
| cygwin*) gl_cv_func_printf_directive_ls="guessing no";; |
| beos* | haiku*) gl_cv_func_printf_directive_ls="guessing no";; |
| *) gl_cv_func_printf_directive_ls="guessing yes";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports POSIX/XSI format |
| dnl strings with positions. (POSIX:2001) |
| dnl Result is gl_cv_func_printf_positions. |
| |
| AC_DEFUN([gl_PRINTF_POSITIONS], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports POSIX/XSI format strings with positions], |
| [gl_cv_func_printf_positions], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| /* The string "%2$d %1$d", with dollar characters protected from the shell's |
| dollar expansion (possibly an autoconf bug). */ |
| static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' }; |
| static char buf[100]; |
| int main () |
| { |
| sprintf (buf, format, 33, 55); |
| return (strcmp (buf, "55 33") != 0); |
| }]])], |
| [gl_cv_func_printf_positions=yes], |
| [gl_cv_func_printf_positions=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*) |
| gl_cv_func_printf_positions="guessing no";; |
| beos*) gl_cv_func_printf_positions="guessing no";; |
| mingw* | pw*) gl_cv_func_printf_positions="guessing no";; |
| *) gl_cv_func_printf_positions="guessing yes";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports POSIX/XSI format |
| dnl strings with the ' flag for grouping of decimal digits. (POSIX:2001) |
| dnl Result is gl_cv_func_printf_flag_grouping. |
| |
| AC_DEFUN([gl_PRINTF_FLAG_GROUPING], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports the grouping flag], |
| [gl_cv_func_printf_flag_grouping], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| static char buf[100]; |
| int main () |
| { |
| if (sprintf (buf, "%'d %d", 1234567, 99) < 0 |
| || buf[strlen (buf) - 1] != '9') |
| return 1; |
| return 0; |
| }]])], |
| [gl_cv_func_printf_flag_grouping=yes], |
| [gl_cv_func_printf_flag_grouping=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| cygwin*) gl_cv_func_printf_flag_grouping="guessing no";; |
| netbsd*) gl_cv_func_printf_flag_grouping="guessing no";; |
| mingw* | pw*) gl_cv_func_printf_flag_grouping="guessing no";; |
| *) gl_cv_func_printf_flag_grouping="guessing yes";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports the - flag correctly. |
| dnl (ISO C99.) See |
| dnl <http://lists.gnu.org/archive/html/bug-coreutils/2008-02/msg00035.html> |
| dnl Result is gl_cv_func_printf_flag_leftadjust. |
| |
| AC_DEFUN([gl_PRINTF_FLAG_LEFTADJUST], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports the left-adjust flag correctly], |
| [gl_cv_func_printf_flag_leftadjust], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| static char buf[100]; |
| int main () |
| { |
| /* Check that a '-' flag is not annihilated by a negative width. */ |
| if (sprintf (buf, "a%-*sc", -3, "b") < 0 |
| || strcmp (buf, "ab c") != 0) |
| return 1; |
| return 0; |
| }]])], |
| [gl_cv_func_printf_flag_leftadjust=yes], |
| [gl_cv_func_printf_flag_leftadjust=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess yes on HP-UX 11. |
| hpux11*) gl_cv_func_printf_flag_leftadjust="guessing yes";; |
| # Guess no on HP-UX 10 and older. |
| hpux*) gl_cv_func_printf_flag_leftadjust="guessing no";; |
| # Guess yes otherwise. |
| *) gl_cv_func_printf_flag_leftadjust="guessing yes";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports padding of non-finite |
| dnl values with the 0 flag correctly. (ISO C99 + TC1 + TC2.) See |
| dnl <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> |
| dnl Result is gl_cv_func_printf_flag_zero. |
| |
| AC_DEFUN([gl_PRINTF_FLAG_ZERO], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports the zero flag correctly], |
| [gl_cv_func_printf_flag_zero], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| static char buf[100]; |
| static double zero = 0.0; |
| int main () |
| { |
| if (sprintf (buf, "%010f", 1.0 / zero, 33, 44, 55) < 0 |
| || (strcmp (buf, " inf") != 0 |
| && strcmp (buf, " infinity") != 0)) |
| return 1; |
| return 0; |
| }]])], |
| [gl_cv_func_printf_flag_zero=yes], |
| [gl_cv_func_printf_flag_zero=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_printf_flag_zero="guessing yes";; |
| # Guess yes on BeOS. |
| beos*) gl_cv_func_printf_flag_zero="guessing yes";; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_printf_flag_zero="guessing no";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions supports large precisions. |
| dnl On mingw, precisions larger than 512 are treated like 512, in integer, |
| dnl floating-point or pointer output. On Solaris 10/x86, precisions larger |
| dnl than 510 in floating-point output crash the program. On Solaris 10/SPARC, |
| dnl precisions larger than 510 in floating-point output yield wrong results. |
| dnl On AIX 7.1, precisions larger than 998 in floating-point output yield |
| dnl wrong results. On BeOS, precisions larger than 1044 crash the program. |
| dnl Result is gl_cv_func_printf_precision. |
| |
| AC_DEFUN([gl_PRINTF_PRECISION], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf supports large precisions], |
| [gl_cv_func_printf_precision], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| static char buf[5000]; |
| int main () |
| { |
| int result = 0; |
| #ifdef __BEOS__ |
| /* On BeOS, this would crash and show a dialog box. Avoid the crash. */ |
| return 1; |
| #endif |
| if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3) |
| result |= 1; |
| if (sprintf (buf, "%.4000f %d", 1.0, 33, 44) < 4000 + 5) |
| result |= 2; |
| if (sprintf (buf, "%.511f %d", 1.0, 33, 44) < 511 + 5 |
| || buf[0] != '1') |
| result |= 4; |
| if (sprintf (buf, "%.999f %d", 1.0, 33, 44) < 999 + 5 |
| || buf[0] != '1') |
| result |= 4; |
| return result; |
| }]])], |
| [gl_cv_func_printf_precision=yes], |
| [gl_cv_func_printf_precision=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess no only on Solaris, native Windows, and BeOS systems. |
| solaris*) gl_cv_func_printf_precision="guessing no" ;; |
| mingw* | pw*) gl_cv_func_printf_precision="guessing no" ;; |
| beos*) gl_cv_func_printf_precision="guessing no" ;; |
| *) gl_cv_func_printf_precision="guessing yes" ;; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the *printf family of functions recovers gracefully in case |
| dnl of an out-of-memory condition, or whether it crashes the entire program. |
| dnl Result is gl_cv_func_printf_enomem. |
| |
| AC_DEFUN([gl_PRINTF_ENOMEM], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([gl_MULTIARCH]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether printf survives out-of-memory conditions], |
| [gl_cv_func_printf_enomem], |
| [ |
| gl_cv_func_printf_enomem="guessing no" |
| if test "$cross_compiling" = no; then |
| if test $APPLE_UNIVERSAL_BUILD = 0; then |
| AC_LANG_CONFTEST([AC_LANG_SOURCE([ |
| ]GL_NOCRASH[ |
| changequote(,)dnl |
| #include <stdio.h> |
| #include <sys/types.h> |
| #include <sys/time.h> |
| #include <sys/resource.h> |
| #include <errno.h> |
| int main() |
| { |
| struct rlimit limit; |
| int ret; |
| nocrash_init (); |
| /* Some printf implementations allocate temporary space with malloc. */ |
| /* On BSD systems, malloc() is limited by RLIMIT_DATA. */ |
| #ifdef RLIMIT_DATA |
| if (getrlimit (RLIMIT_DATA, &limit) < 0) |
| return 77; |
| if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) |
| limit.rlim_max = 5000000; |
| limit.rlim_cur = limit.rlim_max; |
| if (setrlimit (RLIMIT_DATA, &limit) < 0) |
| return 77; |
| #endif |
| /* On Linux systems, malloc() is limited by RLIMIT_AS. */ |
| #ifdef RLIMIT_AS |
| if (getrlimit (RLIMIT_AS, &limit) < 0) |
| return 77; |
| if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) |
| limit.rlim_max = 5000000; |
| limit.rlim_cur = limit.rlim_max; |
| if (setrlimit (RLIMIT_AS, &limit) < 0) |
| return 77; |
| #endif |
| /* Some printf implementations allocate temporary space on the stack. */ |
| #ifdef RLIMIT_STACK |
| if (getrlimit (RLIMIT_STACK, &limit) < 0) |
| return 77; |
| if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) |
| limit.rlim_max = 5000000; |
| limit.rlim_cur = limit.rlim_max; |
| if (setrlimit (RLIMIT_STACK, &limit) < 0) |
| return 77; |
| #endif |
| ret = printf ("%.5000000f", 1.0); |
| return !(ret == 5000002 || (ret < 0 && errno == ENOMEM)); |
| } |
| changequote([,])dnl |
| ])]) |
| if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then |
| (./conftest 2>&AS_MESSAGE_LOG_FD |
| result=$? |
| _AS_ECHO_LOG([\$? = $result]) |
| if test $result != 0 && test $result != 77; then result=1; fi |
| exit $result |
| ) >/dev/null 2>/dev/null |
| case $? in |
| 0) gl_cv_func_printf_enomem="yes" ;; |
| 77) gl_cv_func_printf_enomem="guessing no" ;; |
| *) gl_cv_func_printf_enomem="no" ;; |
| esac |
| else |
| gl_cv_func_printf_enomem="guessing no" |
| fi |
| rm -fr conftest* |
| else |
| dnl A universal build on Apple Mac OS X platforms. |
| dnl The result would be 'no' in 32-bit mode and 'yes' in 64-bit mode. |
| dnl But we need a configuration result that is valid in both modes. |
| gl_cv_func_printf_enomem="guessing no" |
| fi |
| fi |
| if test "$gl_cv_func_printf_enomem" = "guessing no"; then |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_printf_enomem="guessing yes";; |
| # Guess yes on Solaris. |
| solaris*) gl_cv_func_printf_enomem="guessing yes";; |
| # Guess yes on AIX. |
| aix*) gl_cv_func_printf_enomem="guessing yes";; |
| # Guess yes on HP-UX/hppa. |
| hpux*) case "$host_cpu" in |
| hppa*) gl_cv_func_printf_enomem="guessing yes";; |
| *) gl_cv_func_printf_enomem="guessing no";; |
| esac |
| ;; |
| # Guess yes on IRIX. |
| irix*) gl_cv_func_printf_enomem="guessing yes";; |
| # Guess yes on OSF/1. |
| osf*) gl_cv_func_printf_enomem="guessing yes";; |
| # Guess yes on BeOS. |
| beos*) gl_cv_func_printf_enomem="guessing yes";; |
| # Guess yes on Haiku. |
| haiku*) gl_cv_func_printf_enomem="guessing yes";; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_printf_enomem="guessing no";; |
| esac |
| changequote([,])dnl |
| fi |
| ]) |
| ]) |
| |
| dnl Test whether the snprintf function exists. (ISO C99, POSIX:2001) |
| dnl Result is ac_cv_func_snprintf. |
| |
| AC_DEFUN([gl_SNPRINTF_PRESENCE], |
| [ |
| AC_CHECK_FUNCS_ONCE([snprintf]) |
| ]) |
| |
| dnl Test whether the string produced by the snprintf function is always NUL |
| dnl terminated. (ISO C99, POSIX:2001) |
| dnl Result is gl_cv_func_snprintf_truncation_c99. |
| |
| AC_DEFUN([gl_SNPRINTF_TRUNCATION_C99], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_REQUIRE([gl_SNPRINTF_PRESENCE]) |
| AC_CACHE_CHECK([whether snprintf truncates the result as in C99], |
| [gl_cv_func_snprintf_truncation_c99], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| #if HAVE_SNPRINTF |
| # define my_snprintf snprintf |
| #else |
| # include <stdarg.h> |
| static int my_snprintf (char *buf, int size, const char *format, ...) |
| { |
| va_list args; |
| int ret; |
| va_start (args, format); |
| ret = vsnprintf (buf, size, format, args); |
| va_end (args); |
| return ret; |
| } |
| #endif |
| static char buf[100]; |
| int main () |
| { |
| strcpy (buf, "ABCDEF"); |
| my_snprintf (buf, 3, "%d %d", 4567, 89); |
| if (memcmp (buf, "45\0DEF", 6) != 0) |
| return 1; |
| return 0; |
| }]])], |
| [gl_cv_func_snprintf_truncation_c99=yes], |
| [gl_cv_func_snprintf_truncation_c99=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # Guess yes on FreeBSD >= 5. |
| freebsd[1-4]*) gl_cv_func_snprintf_truncation_c99="guessing no";; |
| freebsd* | kfreebsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # Guess yes on Mac OS X >= 10.3. |
| darwin[1-6].*) gl_cv_func_snprintf_truncation_c99="guessing no";; |
| darwin*) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # Guess yes on OpenBSD >= 3.9. |
| openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*) |
| gl_cv_func_snprintf_truncation_c99="guessing no";; |
| openbsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # Guess yes on Solaris >= 2.6. |
| solaris2.[0-5] | solaris2.[0-5].*) |
| gl_cv_func_snprintf_truncation_c99="guessing no";; |
| solaris*) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # Guess yes on AIX >= 4. |
| aix[1-3]*) gl_cv_func_snprintf_truncation_c99="guessing no";; |
| aix*) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # Guess yes on HP-UX >= 11. |
| hpux[7-9]* | hpux10*) gl_cv_func_snprintf_truncation_c99="guessing no";; |
| hpux*) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # Guess yes on IRIX >= 6.5. |
| irix6.5) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # Guess yes on OSF/1 >= 5. |
| osf[3-4]*) gl_cv_func_snprintf_truncation_c99="guessing no";; |
| osf*) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # Guess yes on NetBSD >= 3. |
| netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) |
| gl_cv_func_snprintf_truncation_c99="guessing no";; |
| netbsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # Guess yes on BeOS. |
| beos*) gl_cv_func_snprintf_truncation_c99="guessing yes";; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_snprintf_truncation_c99="guessing no";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the return value of the snprintf function is the number |
| dnl of bytes (excluding the terminating NUL) that would have been produced |
| dnl if the buffer had been large enough. (ISO C99, POSIX:2001) |
| dnl For example, this test program fails on IRIX 6.5: |
| dnl --------------------------------------------------------------------- |
| dnl #include <stdio.h> |
| dnl int main() |
| dnl { |
| dnl static char buf[8]; |
| dnl int retval = snprintf (buf, 3, "%d", 12345); |
| dnl return retval >= 0 && retval < 3; |
| dnl } |
| dnl --------------------------------------------------------------------- |
| dnl Result is gl_cv_func_snprintf_retval_c99. |
| |
| AC_DEFUN_ONCE([gl_SNPRINTF_RETVAL_C99], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_REQUIRE([gl_SNPRINTF_PRESENCE]) |
| AC_CACHE_CHECK([whether snprintf returns a byte count as in C99], |
| [gl_cv_func_snprintf_retval_c99], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| #if HAVE_SNPRINTF |
| # define my_snprintf snprintf |
| #else |
| # include <stdarg.h> |
| static int my_snprintf (char *buf, int size, const char *format, ...) |
| { |
| va_list args; |
| int ret; |
| va_start (args, format); |
| ret = vsnprintf (buf, size, format, args); |
| va_end (args); |
| return ret; |
| } |
| #endif |
| static char buf[100]; |
| int main () |
| { |
| strcpy (buf, "ABCDEF"); |
| if (my_snprintf (buf, 3, "%d %d", 4567, 89) != 7) |
| return 1; |
| if (my_snprintf (buf, 0, "%d %d", 4567, 89) != 7) |
| return 2; |
| if (my_snprintf (NULL, 0, "%d %d", 4567, 89) != 7) |
| return 3; |
| return 0; |
| }]])], |
| [gl_cv_func_snprintf_retval_c99=yes], |
| [gl_cv_func_snprintf_retval_c99=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_snprintf_retval_c99="guessing yes";; |
| # Guess yes on FreeBSD >= 5. |
| freebsd[1-4]*) gl_cv_func_snprintf_retval_c99="guessing no";; |
| freebsd* | kfreebsd*) gl_cv_func_snprintf_retval_c99="guessing yes";; |
| # Guess yes on Mac OS X >= 10.3. |
| darwin[1-6].*) gl_cv_func_snprintf_retval_c99="guessing no";; |
| darwin*) gl_cv_func_snprintf_retval_c99="guessing yes";; |
| # Guess yes on OpenBSD >= 3.9. |
| openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*) |
| gl_cv_func_snprintf_retval_c99="guessing no";; |
| openbsd*) gl_cv_func_snprintf_retval_c99="guessing yes";; |
| # Guess yes on Solaris >= 2.10. |
| solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";; |
| solaris*) gl_cv_func_printf_sizes_c99="guessing no";; |
| # Guess yes on AIX >= 4. |
| aix[1-3]*) gl_cv_func_snprintf_retval_c99="guessing no";; |
| aix*) gl_cv_func_snprintf_retval_c99="guessing yes";; |
| # Guess yes on NetBSD >= 3. |
| netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) |
| gl_cv_func_snprintf_retval_c99="guessing no";; |
| netbsd*) gl_cv_func_snprintf_retval_c99="guessing yes";; |
| # Guess yes on BeOS. |
| beos*) gl_cv_func_snprintf_retval_c99="guessing yes";; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_snprintf_retval_c99="guessing no";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the snprintf function supports the %n format directive |
| dnl also in truncated portions of the format string. (ISO C99, POSIX:2001) |
| dnl Result is gl_cv_func_snprintf_directive_n. |
| |
| AC_DEFUN([gl_SNPRINTF_DIRECTIVE_N], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_REQUIRE([gl_SNPRINTF_PRESENCE]) |
| AC_CACHE_CHECK([whether snprintf fully supports the 'n' directive], |
| [gl_cv_func_snprintf_directive_n], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <string.h> |
| #if HAVE_SNPRINTF |
| # define my_snprintf snprintf |
| #else |
| # include <stdarg.h> |
| static int my_snprintf (char *buf, int size, const char *format, ...) |
| { |
| va_list args; |
| int ret; |
| va_start (args, format); |
| ret = vsnprintf (buf, size, format, args); |
| va_end (args); |
| return ret; |
| } |
| #endif |
| static char fmtstring[10]; |
| static char buf[100]; |
| int main () |
| { |
| int count = -1; |
| /* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2) |
| support %n in format strings in read-only memory but not in writable |
| memory. */ |
| strcpy (fmtstring, "%d %n"); |
| my_snprintf (buf, 4, fmtstring, 12345, &count, 33, 44, 55); |
| if (count != 6) |
| return 1; |
| return 0; |
| }]])], |
| [gl_cv_func_snprintf_directive_n=yes], |
| [gl_cv_func_snprintf_directive_n=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_snprintf_directive_n="guessing yes";; |
| # Guess yes on FreeBSD >= 5. |
| freebsd[1-4]*) gl_cv_func_snprintf_directive_n="guessing no";; |
| freebsd* | kfreebsd*) gl_cv_func_snprintf_directive_n="guessing yes";; |
| # Guess yes on Mac OS X >= 10.3. |
| darwin[1-6].*) gl_cv_func_snprintf_directive_n="guessing no";; |
| darwin*) gl_cv_func_snprintf_directive_n="guessing yes";; |
| # Guess yes on Solaris >= 2.6. |
| solaris2.[0-5] | solaris2.[0-5].*) |
| gl_cv_func_snprintf_directive_n="guessing no";; |
| solaris*) gl_cv_func_snprintf_directive_n="guessing yes";; |
| # Guess yes on AIX >= 4. |
| aix[1-3]*) gl_cv_func_snprintf_directive_n="guessing no";; |
| aix*) gl_cv_func_snprintf_directive_n="guessing yes";; |
| # Guess yes on IRIX >= 6.5. |
| irix6.5) gl_cv_func_snprintf_directive_n="guessing yes";; |
| # Guess yes on OSF/1 >= 5. |
| osf[3-4]*) gl_cv_func_snprintf_directive_n="guessing no";; |
| osf*) gl_cv_func_snprintf_directive_n="guessing yes";; |
| # Guess yes on NetBSD >= 3. |
| netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) |
| gl_cv_func_snprintf_directive_n="guessing no";; |
| netbsd*) gl_cv_func_snprintf_directive_n="guessing yes";; |
| # Guess yes on BeOS. |
| beos*) gl_cv_func_snprintf_directive_n="guessing yes";; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_snprintf_directive_n="guessing no";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether the snprintf function, when passed a size = 1, writes any |
| dnl output without bounds in this case, behaving like sprintf. This is the |
| dnl case on Linux libc5. |
| dnl Result is gl_cv_func_snprintf_size1. |
| |
| AC_DEFUN([gl_SNPRINTF_SIZE1], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([gl_SNPRINTF_PRESENCE]) |
| AC_CACHE_CHECK([whether snprintf respects a size of 1], |
| [gl_cv_func_snprintf_size1], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #if HAVE_SNPRINTF |
| # define my_snprintf snprintf |
| #else |
| # include <stdarg.h> |
| static int my_snprintf (char *buf, int size, const char *format, ...) |
| { |
| va_list args; |
| int ret; |
| va_start (args, format); |
| ret = vsnprintf (buf, size, format, args); |
| va_end (args); |
| return ret; |
| } |
| #endif |
| int main() |
| { |
| static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; |
| my_snprintf (buf, 1, "%d", 12345); |
| return buf[1] != 'E'; |
| }]])], |
| [gl_cv_func_snprintf_size1=yes], |
| [gl_cv_func_snprintf_size1=no], |
| [gl_cv_func_snprintf_size1="guessing yes"]) |
| ]) |
| ]) |
| |
| dnl Test whether the vsnprintf function, when passed a zero size, produces no |
| dnl output. (ISO C99, POSIX:2001) |
| dnl For example, snprintf nevertheless writes a NUL byte in this case |
| dnl on OSF/1 5.1: |
| dnl --------------------------------------------------------------------- |
| dnl #include <stdio.h> |
| dnl int main() |
| dnl { |
| dnl static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; |
| dnl snprintf (buf, 0, "%d", 12345); |
| dnl return buf[0] != 'D'; |
| dnl } |
| dnl --------------------------------------------------------------------- |
| dnl And vsnprintf writes any output without bounds in this case, behaving like |
| dnl vsprintf, on HP-UX 11 and OSF/1 5.1: |
| dnl --------------------------------------------------------------------- |
| dnl #include <stdarg.h> |
| dnl #include <stdio.h> |
| dnl static int my_snprintf (char *buf, int size, const char *format, ...) |
| dnl { |
| dnl va_list args; |
| dnl int ret; |
| dnl va_start (args, format); |
| dnl ret = vsnprintf (buf, size, format, args); |
| dnl va_end (args); |
| dnl return ret; |
| dnl } |
| dnl int main() |
| dnl { |
| dnl static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; |
| dnl my_snprintf (buf, 0, "%d", 12345); |
| dnl return buf[0] != 'D'; |
| dnl } |
| dnl --------------------------------------------------------------------- |
| dnl Result is gl_cv_func_vsnprintf_zerosize_c99. |
| |
| AC_DEFUN([gl_VSNPRINTF_ZEROSIZE_C99], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether vsnprintf respects a zero size as in C99], |
| [gl_cv_func_vsnprintf_zerosize_c99], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdarg.h> |
| #include <stdio.h> |
| static int my_snprintf (char *buf, int size, const char *format, ...) |
| { |
| va_list args; |
| int ret; |
| va_start (args, format); |
| ret = vsnprintf (buf, size, format, args); |
| va_end (args); |
| return ret; |
| } |
| int main() |
| { |
| static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; |
| my_snprintf (buf, 0, "%d", 12345); |
| return buf[0] != 'D'; |
| }]])], |
| [gl_cv_func_vsnprintf_zerosize_c99=yes], |
| [gl_cv_func_vsnprintf_zerosize_c99=no], |
| [ |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; |
| # Guess yes on FreeBSD >= 5. |
| freebsd[1-4]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";; |
| freebsd* | kfreebsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; |
| # Guess yes on Mac OS X >= 10.3. |
| darwin[1-6].*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";; |
| darwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; |
| # Guess yes on Cygwin. |
| cygwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; |
| # Guess yes on Solaris >= 2.6. |
| solaris2.[0-5] | solaris2.[0-5].*) |
| gl_cv_func_vsnprintf_zerosize_c99="guessing no";; |
| solaris*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; |
| # Guess yes on AIX >= 4. |
| aix[1-3]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";; |
| aix*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; |
| # Guess yes on IRIX >= 6.5. |
| irix6.5) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; |
| # Guess yes on NetBSD >= 3. |
| netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) |
| gl_cv_func_vsnprintf_zerosize_c99="guessing no";; |
| netbsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; |
| # Guess yes on BeOS. |
| beos*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; |
| # Guess yes on mingw. |
| mingw* | pw*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";; |
| # If we don't know, assume the worst. |
| *) gl_cv_func_vsnprintf_zerosize_c99="guessing no";; |
| esac |
| changequote([,])dnl |
| ]) |
| ]) |
| ]) |
| |
| dnl The results of these tests on various platforms are: |
| dnl |
| dnl 1 = gl_PRINTF_SIZES_C99 |
| dnl 2 = gl_PRINTF_LONG_DOUBLE |
| dnl 3 = gl_PRINTF_INFINITE |
| dnl 4 = gl_PRINTF_INFINITE_LONG_DOUBLE |
| dnl 5 = gl_PRINTF_DIRECTIVE_A |
| dnl 6 = gl_PRINTF_DIRECTIVE_F |
| dnl 7 = gl_PRINTF_DIRECTIVE_N |
| dnl 8 = gl_PRINTF_DIRECTIVE_LS |
| dnl 9 = gl_PRINTF_POSITIONS |
| dnl 10 = gl_PRINTF_FLAG_GROUPING |
| dnl 11 = gl_PRINTF_FLAG_LEFTADJUST |
| dnl 12 = gl_PRINTF_FLAG_ZERO |
| dnl 13 = gl_PRINTF_PRECISION |
| dnl 14 = gl_PRINTF_ENOMEM |
| dnl 15 = gl_SNPRINTF_PRESENCE |
| dnl 16 = gl_SNPRINTF_TRUNCATION_C99 |
| dnl 17 = gl_SNPRINTF_RETVAL_C99 |
| dnl 18 = gl_SNPRINTF_DIRECTIVE_N |
| dnl 19 = gl_SNPRINTF_SIZE1 |
| dnl 20 = gl_VSNPRINTF_ZEROSIZE_C99 |
| dnl |
| dnl 1 = checking whether printf supports size specifiers as in C99... |
| dnl 2 = checking whether printf supports 'long double' arguments... |
| dnl 3 = checking whether printf supports infinite 'double' arguments... |
| dnl 4 = checking whether printf supports infinite 'long double' arguments... |
| dnl 5 = checking whether printf supports the 'a' and 'A' directives... |
| dnl 6 = checking whether printf supports the 'F' directive... |
| dnl 7 = checking whether printf supports the 'n' directive... |
| dnl 8 = checking whether printf supports the 'ls' directive... |
| dnl 9 = checking whether printf supports POSIX/XSI format strings with positions... |
| dnl 10 = checking whether printf supports the grouping flag... |
| dnl 11 = checking whether printf supports the left-adjust flag correctly... |
| dnl 12 = checking whether printf supports the zero flag correctly... |
| dnl 13 = checking whether printf supports large precisions... |
| dnl 14 = checking whether printf survives out-of-memory conditions... |
| dnl 15 = checking for snprintf... |
| dnl 16 = checking whether snprintf truncates the result as in C99... |
| dnl 17 = checking whether snprintf returns a byte count as in C99... |
| dnl 18 = checking whether snprintf fully supports the 'n' directive... |
| dnl 19 = checking whether snprintf respects a size of 1... |
| dnl 20 = checking whether vsnprintf respects a zero size as in C99... |
| dnl |
| dnl . = yes, # = no. |
| dnl |
| dnl 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |
| dnl glibc 2.5 . . . . . . . . . . . . . . . . . . . . |
| dnl glibc 2.3.6 . . . . # . . . . . . . . . . . . . . . |
| dnl FreeBSD 5.4, 6.1 . . . . # . . . . . . # . # . . . . . . |
| dnl Mac OS X 10.5.8 . . . # # . . . . . . # . . . . . . . . |
| dnl Mac OS X 10.3.9 . . . . # . . . . . . # . # . . . . . . |
| dnl OpenBSD 3.9, 4.0 . . # # # # . # . # . # . # . . . . . . |
| dnl Cygwin 1.7.0 (2009) . . . # . . . ? . . . . . ? . . . . . . |
| dnl Cygwin 1.5.25 (2008) . . . # # . . # . . . . . # . . . . . . |
| dnl Cygwin 1.5.19 (2006) # . . # # # . # . # . # # # . . . . . . |
| dnl Solaris 11 2011-11 . . # # # . . # . . . # . . . . . . . . |
| dnl Solaris 10 . . # # # . . # . . . # # . . . . . . . |
| dnl Solaris 2.6 ... 9 # . # # # # . # . . . # # . . . # . . . |
| dnl Solaris 2.5.1 # . # # # # . # . . . # . . # # # # # # |
| dnl AIX 7.1 . . # # # . . . . . . # # . . . . . . . |
| dnl AIX 5.2 . . # # # . . . . . . # . . . . . . . . |
| dnl AIX 4.3.2, 5.1 # . # # # # . . . . . # . . . . # . . . |
| dnl HP-UX 11.31 . . . . # . . . . . . # . . . . # # . . |
| dnl HP-UX 11.{00,11,23} # . . . # # . . . . . # . . . . # # . # |
| dnl HP-UX 10.20 # . # . # # . ? . . # # . . . . # # ? # |
| dnl IRIX 6.5 # . # # # # . # . . . # . . . . # . . . |
| dnl OSF/1 5.1 # . # # # # . . . . . # . . . . # . . # |
| dnl OSF/1 4.0d # . # # # # . . . . . # . . # # # # # # |
| dnl NetBSD 5.0 . . . # # . . . . . . # . # . . . . . . |
| dnl NetBSD 4.0 . ? ? ? ? ? . ? . ? ? ? ? ? . . . ? ? ? |
| dnl NetBSD 3.0 . . . . # # . ? # # ? # . # . . . . . . |
| dnl Haiku . . . # # # . # . . . . . ? . . ? . . . |
| dnl BeOS # # . # # # . ? # . ? . # ? . . ? . . . |
| dnl old mingw / msvcrt # # # # # # . . # # . # # ? . # # # . . |
| dnl MSVC 9 # # # # # # # . # # . # # ? # # # # . . |
| dnl mingw 2009-2011 . # . # . . . . # # . . . ? . . . . . . |
| dnl mingw-w64 2011 # # # # # # . . # # . # # ? . # # # . . |
