X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fprintf.m4;h=a1d4dadd7bb6819e7739162482fcc0b99cfc3567;hb=2f23fbb2ce253697930e8f769e13134f9be81363;hp=a03f4a0b3d51b18f1583a14bd9951b0b76175bdd;hpb=17ccaa9d86f36720593a6d75f277657177a6d8a9;p=gnulib.git diff --git a/m4/printf.m4 b/m4/printf.m4 index a03f4a0b3..a1d4dadd7 100644 --- a/m4/printf.m4 +++ b/m4/printf.m4 @@ -1,5 +1,5 @@ -# printf.m4 serial 13 -dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc. +# printf.m4 serial 28 +dnl Copyright (C) 2003, 2007-2009 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. @@ -95,7 +95,7 @@ AC_DEFUN([gl_PRINTF_LONG_DOUBLE], AC_TRY_RUN([ #include #include -static char buf[100]; +static char buf[10000]; int main () { buf[0] = '\0'; @@ -156,7 +156,7 @@ strisnan (const char *string, size_t start_index, size_t end_index) } return 0; } -static char buf[100]; +static char buf[10000]; static double zero = 0.0; int main () { @@ -225,13 +225,23 @@ AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE], [ AC_REQUIRE([gl_PRINTF_LONG_DOUBLE]) AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([gl_BIGENDIAN]) AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + dnl The user can set or unset the variable gl_printf_safe to indicate + dnl that he wishes a safe handling of non-IEEE-754 'long double' values. + if test -n "$gl_printf_safe"; then + AC_DEFINE([CHECK_PRINTF_SAFE], [1], + [Define if you wish *printf() functions that have a safe handling of + non-IEEE-754 'long double' values.]) + fi case "$gl_cv_func_printf_long_double" in *yes) AC_CACHE_CHECK([whether printf supports infinite 'long double' arguments], [gl_cv_func_printf_infinite_long_double], [ AC_TRY_RUN([ +]GL_NOCRASH[ +#include #include #include static int @@ -252,10 +262,11 @@ strisnan (const char *string, size_t start_index, size_t end_index) } return 0; } -static char buf[100]; +static char buf[10000]; static long double zeroL = 0.0L; int main () { + nocrash_init(); if (sprintf (buf, "%Lf", 1.0L / 0.0L) < 0 || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) return 1; @@ -283,30 +294,142 @@ int main () if (sprintf (buf, "%Lg", zeroL / zeroL) < 0 || !strisnan (buf, 0, strlen (buf))) return 1; +#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) +/* Representation of an 80-bit 'long double' as an initializer for a sequence + of 'unsigned int' words. */ +# ifdef WORDS_BIGENDIAN +# define LDBL80_WORDS(exponent,manthi,mantlo) \ + { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \ + ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \ + (unsigned int) (mantlo) << 16 \ + } +# else +# define LDBL80_WORDS(exponent,manthi,mantlo) \ + { mantlo, manthi, exponent } +# endif + { /* Quiet NaN. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { + /* Signalling NaN. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { /* Pseudo-NaN. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { /* Pseudo-Infinity. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { /* Pseudo-Zero. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { /* Unnormalized number. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { /* Pseudo-Denormal. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } +#endif return 0; }], [gl_cv_func_printf_infinite_long_double=yes], [gl_cv_func_printf_infinite_long_double=no], [ changequote(,)dnl - case "$host_os" in - # Guess yes on glibc systems. - *-gnu*) gl_cv_func_printf_infinite_long_double="guessing yes";; - # Guess yes on FreeBSD >= 6. - freebsd[1-5]*) gl_cv_func_printf_infinite_long_double="guessing no";; - freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";; - # Guess yes on MacOS X >= 10.3. - darwin[1-6].*) gl_cv_func_printf_infinite_long_double="guessing no";; - darwin*) gl_cv_func_printf_infinite_long_double="guessing yes";; - # Guess yes on HP-UX >= 11. - hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";; - hpux*) gl_cv_func_printf_infinite_long_double="guessing yes";; - # Guess yes on NetBSD >= 3. - netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) - gl_cv_func_printf_infinite_long_double="guessing no";; - netbsd*) gl_cv_func_printf_infinite_long_double="guessing yes";; - # If we don't know, assume the worst. - *) gl_cv_func_printf_infinite_long_double="guessing no";; + case "$host_cpu" in + # Guess no on ia64, x86_64, i386. + ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";; + *) + case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) gl_cv_func_printf_infinite_long_double="guessing yes";; + # Guess yes on FreeBSD >= 6. + freebsd[1-5]*) gl_cv_func_printf_infinite_long_double="guessing no";; + freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";; + # Guess yes on MacOS X >= 10.3. + darwin[1-6].*) gl_cv_func_printf_infinite_long_double="guessing no";; + darwin*) gl_cv_func_printf_infinite_long_double="guessing yes";; + # Guess yes on HP-UX >= 11. + hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";; + hpux*) gl_cv_func_printf_infinite_long_double="guessing yes";; + # Guess yes on NetBSD >= 3. + netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) + gl_cv_func_printf_infinite_long_double="guessing no";; + netbsd*) gl_cv_func_printf_infinite_long_double="guessing yes";; + # If we don't know, assume the worst. + *) gl_cv_func_printf_infinite_long_double="guessing no";; + esac + ;; esac changequote([,])dnl ]) @@ -464,11 +587,16 @@ AC_DEFUN([gl_PRINTF_DIRECTIVE_N], AC_TRY_RUN([ #include #include +static char fmtstring[10]; static char buf[100]; int main () { int count = -1; - if (sprintf (buf, "%d %n", 123, &count, 33, 44, 55) < 0 + /* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2) + support %n in format strings in read-only memory but not in writable + memory. */ + strcpy (fmtstring, "%d %n"); + if (sprintf (buf, fmtstring, 123, &count, 33, 44, 55) < 0 || strcmp (buf, "123 ") != 0 || count != 4) return 1; @@ -556,6 +684,47 @@ changequote([,])dnl ]) ]) +dnl Test whether the *printf family of functions supports the - flag correctly. +dnl (ISO C99.) See +dnl +dnl Result is gl_cv_func_printf_flag_leftadjust. + +AC_DEFUN([gl_PRINTF_FLAG_LEFTADJUST], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether printf supports the left-adjust flag correctly], + [gl_cv_func_printf_flag_leftadjust], + [ + AC_TRY_RUN([ +#include +#include +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 @@ -595,6 +764,163 @@ 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 BeOS, precisions larger than 1044 +dnl crash the program. +dnl Result is gl_cv_func_printf_precision. + +AC_DEFUN([gl_PRINTF_PRECISION], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether printf supports large precisions], + [gl_cv_func_printf_precision], + [ + AC_TRY_RUN([ +#include +#include +static char buf[5000]; +int main () +{ +#ifdef __BEOS__ + /* On BeOS, this would crash and show a dialog box. Avoid the crash. */ + return 1; +#endif + if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3) + return 1; + return 0; +}], [gl_cv_func_printf_precision=yes], [gl_cv_func_printf_precision=no], + [ +changequote(,)dnl + case "$host_os" in + # Guess no only on native Win32 and BeOS systems. + mingw* | pw*) gl_cv_func_printf_precision="guessing no" ;; + beos*) gl_cv_func_printf_precision="guessing no" ;; + *) gl_cv_func_printf_precision="guessing yes" ;; + esac +changequote([,])dnl + ]) + ]) +]) + +dnl Test whether the *printf family of functions recovers gracefully in case +dnl of an out-of-memory condition, or whether it crashes the entire program. +dnl Result is gl_cv_func_printf_enomem. + +AC_DEFUN([gl_PRINTF_ENOMEM], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([gl_MULTIARCH]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether printf survives out-of-memory conditions], + [gl_cv_func_printf_enomem], + [ + gl_cv_func_printf_enomem="guessing no" + if test "$cross_compiling" = no; then + if test $APPLE_UNIVERSAL_BUILD = 0; then + AC_LANG_CONFTEST([AC_LANG_SOURCE([ +]GL_NOCRASH[ +changequote(,)dnl +#include +#include +#include +#include +#include +int main() +{ + struct rlimit limit; + int ret; + nocrash_init (); + /* Some printf implementations allocate temporary space with malloc. */ + /* On BSD systems, malloc() is limited by RLIMIT_DATA. */ +#ifdef RLIMIT_DATA + if (getrlimit (RLIMIT_DATA, &limit) < 0) + return 77; + if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) + limit.rlim_max = 5000000; + limit.rlim_cur = limit.rlim_max; + if (setrlimit (RLIMIT_DATA, &limit) < 0) + return 77; +#endif + /* On Linux systems, malloc() is limited by RLIMIT_AS. */ +#ifdef RLIMIT_AS + if (getrlimit (RLIMIT_AS, &limit) < 0) + return 77; + if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) + limit.rlim_max = 5000000; + limit.rlim_cur = limit.rlim_max; + if (setrlimit (RLIMIT_AS, &limit) < 0) + return 77; +#endif + /* Some printf implementations allocate temporary space on the stack. */ +#ifdef RLIMIT_STACK + if (getrlimit (RLIMIT_STACK, &limit) < 0) + return 77; + if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) + limit.rlim_max = 5000000; + limit.rlim_cur = limit.rlim_max; + if (setrlimit (RLIMIT_STACK, &limit) < 0) + return 77; +#endif + ret = printf ("%.5000000f", 1.0); + return !(ret == 5000002 || (ret < 0 && errno == ENOMEM)); +} +changequote([,])dnl + ])]) + if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then + (./conftest + result=$? + if test $result != 0 && test $result != 77; then result=1; fi + exit $result + ) >/dev/null 2>/dev/null + case $? in + 0) gl_cv_func_printf_enomem="yes" ;; + 77) gl_cv_func_printf_enomem="guessing no" ;; + *) gl_cv_func_printf_enomem="no" ;; + esac + else + gl_cv_func_printf_enomem="guessing no" + fi + rm -fr conftest* + else + dnl A universal build on Apple MacOS X platforms. + dnl The result would be 'no' in 32-bit mode and 'yes' in 64-bit mode. + dnl But we need a configuration result that is valid in both modes. + gl_cv_func_printf_enomem="guessing no" + fi + fi + if test "$gl_cv_func_printf_enomem" = "guessing no"; then +changequote(,)dnl + case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) gl_cv_func_printf_enomem="guessing yes";; + # Guess yes on Solaris. + solaris*) gl_cv_func_printf_enomem="guessing yes";; + # Guess yes on AIX. + aix*) gl_cv_func_printf_enomem="guessing yes";; + # Guess yes on HP-UX/hppa. + hpux*) case "$host_cpu" in + hppa*) gl_cv_func_printf_enomem="guessing yes";; + *) gl_cv_func_printf_enomem="guessing no";; + esac + ;; + # Guess yes on IRIX. + irix*) gl_cv_func_printf_enomem="guessing yes";; + # Guess yes on OSF/1. + osf*) gl_cv_func_printf_enomem="guessing yes";; + # Guess yes on BeOS. + beos*) gl_cv_func_printf_enomem="guessing yes";; + # Guess yes on Haiku. + haiku*) gl_cv_func_printf_enomem="guessing yes";; + # If we don't know, assume the worst. + *) gl_cv_func_printf_enomem="guessing no";; + esac +changequote([,])dnl + fi + ]) +]) + dnl Test whether the snprintf function exists. (ISO C99, POSIX:2001) dnl Result is ac_cv_func_snprintf. @@ -751,11 +1077,16 @@ AC_DEFUN([gl_SNPRINTF_DIRECTIVE_N], AC_TRY_RUN([ #include #include +static char fmtstring[10]; static char buf[100]; int main () { int count = -1; - snprintf (buf, 4, "%d %n", 12345, &count, 33, 44, 55); + /* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2) + support %n in format strings in read-only memory but not in writable + memory. */ + strcpy (fmtstring, "%d %n"); + snprintf (buf, 4, fmtstring, 12345, &count, 33, 44, 55); if (count != 6) return 1; return 0; @@ -796,6 +1127,31 @@ 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_CACHE_CHECK([whether snprintf respects a size of 1], + [gl_cv_func_snprintf_size1], + [ + AC_TRY_RUN([ +#include +int main() +{ + static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; + snprintf (buf, 1, "%d", 12345); + return buf[1] != 'E'; +}], + [gl_cv_func_snprintf_size1=yes], + [gl_cv_func_snprintf_size1=no], + [gl_cv_func_snprintf_size1="guessing yes"]) + ]) +]) + dnl Test whether the vsnprintf function, when passed a zero size, produces no dnl output. (ISO C99, POSIX:2001) dnl For example, snprintf nevertheless writes a NUL byte in this case @@ -804,7 +1160,7 @@ dnl --------------------------------------------------------------------- dnl #include dnl int main() dnl { -dnl static char buf[8] = "DEADBEEF"; +dnl static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; dnl snprintf (buf, 0, "%d", 12345); dnl return buf[0] != 'D'; dnl } @@ -825,7 +1181,7 @@ dnl return ret; dnl } dnl int main() dnl { -dnl static char buf[8] = "DEADBEEF"; +dnl static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; dnl my_snprintf (buf, 0, "%d", 12345); dnl return buf[0] != 'D'; dnl } @@ -853,7 +1209,7 @@ static int my_snprintf (char *buf, int size, const char *format, ...) } int main() { - static char buf[8] = "DEADBEEF"; + static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' }; my_snprintf (buf, 0, "%d", 12345); return buf[0] != 'D'; }], @@ -907,12 +1263,16 @@ dnl 6 = gl_PRINTF_DIRECTIVE_F dnl 7 = gl_PRINTF_DIRECTIVE_N dnl 8 = gl_PRINTF_POSITIONS dnl 9 = gl_PRINTF_FLAG_GROUPING -dnl 10 = gl_PRINTF_FLAG_ZERO -dnl 11 = gl_SNPRINTF_PRESENCE -dnl 12 = gl_SNPRINTF_TRUNCATION_C99 -dnl 13 = gl_SNPRINTF_RETVAL_C99 -dnl 14 = gl_SNPRINTF_DIRECTIVE_N -dnl 15 = gl_VSNPRINTF_ZEROSIZE_C99 +dnl 10 = gl_PRINTF_FLAG_LEFTADJUST +dnl 11 = gl_PRINTF_FLAG_ZERO +dnl 12 = gl_PRINTF_PRECISION +dnl 13 = gl_PRINTF_ENOMEM +dnl 14 = gl_SNPRINTF_PRESENCE +dnl 15 = gl_SNPRINTF_TRUNCATION_C99 +dnl 16 = gl_SNPRINTF_RETVAL_C99 +dnl 17 = gl_SNPRINTF_DIRECTIVE_N +dnl 18 = gl_SNPRINTF_SIZE1 +dnl 19 = 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... @@ -923,34 +1283,40 @@ dnl 6 = checking whether printf supports the 'F' directive... dnl 7 = checking whether printf supports the 'n' directive... dnl 8 = checking whether printf supports POSIX/XSI format strings with positions... dnl 9 = checking whether printf supports the grouping flag... -dnl 10 = checking whether printf supports the zero flag correctly... -dnl 11 = checking for snprintf... -dnl 12 = checking whether snprintf truncates the result as in C99... -dnl 13 = checking whether snprintf returns a byte count as in C99... -dnl 14 = checking whether snprintf fully supports the 'n' directive... -dnl 15 = checking whether vsnprintf respects a zero size as in C99... +dnl 10 = checking whether printf supports the left-adjust flag correctly... +dnl 11 = checking whether printf supports the zero flag correctly... +dnl 12 = checking whether printf supports large precisions... +dnl 13 = checking whether printf survives out-of-memory conditions... +dnl 14 = checking for snprintf... +dnl 15 = checking whether snprintf truncates the result as in C99... +dnl 16 = checking whether snprintf returns a byte count as in C99... +dnl 17 = checking whether snprintf fully supports the 'n' directive... +dnl 18 = checking whether snprintf respects a size of 1... +dnl 19 = 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 -dnl glibc 2.5 . . . . . . . . . . . . . . . -dnl glibc 2.3.6 . . . . # . . . . . . . . . . -dnl FreeBSD 5.4, 6.1 . . . . # . . . . # . . . . . -dnl MacOS X 10.3.9 . . . . # . . . . # . . . . . -dnl OpenBSD 3.9, 4.0 . ? ? ? # ? . . ? ? . . . ? ? -dnl Cygwin 2007 (= Cygwin 1.5.24) . . . . # # . . . # . . . . . -dnl Cygwin 2006 (= Cygwin 1.5.19) # . . . # # . . # # . . . . . -dnl Solaris 10 . . # # # . . . . # . . . . . -dnl Solaris 2.6 ... 9 # . # # # # . . . # . . . . . -dnl Solaris 2.5.1 # . # # # # . . . # # # # # # -dnl AIX 5.2 . . # # # . . . . # . . . . . -dnl AIX 4.3.2, 5.1 # . # # # # . . . # . . . . . -dnl HP-UX 11.31 . . . . # . . . . # . . # # . -dnl HP-UX 10.20, 11.{00,11,23} # . . . # # . . . # . . # # # -dnl IRIX 6.5 # . # # # # . . . # . . # . . -dnl OSF/1 5.1 # . # # # # . . . # . . # . # -dnl OSF/1 4.0d # . # # # # . . . # # # # # # -dnl NetBSD 4.0 . ? ? ? ? ? . . ? ? . . . ? ? -dnl NetBSD 3.0 . . . . # # . # # # . . . . . -dnl BeOS # # . # # # . # . . . . . . . -dnl mingw # # # # # # . # # # . # # # . +dnl 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 +dnl glibc 2.5 . . . . . . . . . . . . . . . . . . . +dnl glibc 2.3.6 . . . . # . . . . . . . . . . . . . . +dnl FreeBSD 5.4, 6.1 . . . . # . . . . . # . # . . . . . . +dnl MacOS X 10.3.9 . . . . # . . . . . # . # . . . . . . +dnl OpenBSD 3.9, 4.0 . . # # # # . . # . # . # . . . . . . +dnl Cygwin 2007 (= Cygwin 1.5.24) . . . . # # . . . ? # ? ? . . . . . . +dnl Cygwin 2006 (= Cygwin 1.5.19) # . . . # # . . # ? # ? ? . . . . . . +dnl Solaris 10 . . # # # . . . . . # . . . . . . . . +dnl Solaris 2.6 ... 9 # . # # # # . . . . # . . . . . . . . +dnl Solaris 2.5.1 # . # # # # . . . . # . . # # # # # # +dnl AIX 5.2 . . # # # . . . . . # . . . . . . . . +dnl AIX 4.3.2, 5.1 # . # # # # . . . . # . . . . . . . . +dnl HP-UX 11.31 . . . . # . . . . . # . . . . # # . . +dnl HP-UX 11.{00,11,23} # . . . # # . . . . # . . . . # # . # +dnl HP-UX 10.20 # . . . # # . . . # # . . . . # # ? # +dnl IRIX 6.5 # . # # # # . . . . # . . . . # . . . +dnl OSF/1 5.1 # . # # # # . . . . # . . . . # . . # +dnl OSF/1 4.0d # . # # # # . . . . # . . # # # # # # +dnl NetBSD 4.0 . ? ? ? ? ? . . ? ? ? ? ? . . . ? ? ? +dnl NetBSD 3.0 . . . . # # . # # ? # . # . . . . . . +dnl Haiku . . . # # # . . . . . . ? . . . . . . +dnl BeOS # # . # # # . # . ? . # ? . . . . . . +dnl mingw # # # # # # . # # . # # ? . # # # . .