strtof.m4

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Date : 2025-09-10T23:22:53

Remove support for IRIX.

* all-modules: Update comments.
* build-aux/install-reloc: Likewise.
* build-aux/reloc-ldflags: Likewise.
* gnulib-tool: Likewise.
* gnulib-tool.py: Likewise.
* gnulib-tool.sh: Likewise.
* lib/aligned-malloc.h: Likewise.
* lib/boot-time.c: Likewise.
* lib/c32is-impl.h: Likewise.
* lib/c32srtombs-state.c: Likewise.
* lib/c32to-impl.h: Likewise.
* lib/c32width.c: Likewise.
* lib/errno.in.h: Likewise.
* lib/euidaccess.c: Likewise.
* lib/fbufmode.c: Likewise.
* lib/fenv-except-state-get.c: Likewise.
* lib/fenv-except-state-set.c: Likewise.
* lib/fenv-except-tracking-clear.c: Likewise.
* lib/fenv-except-tracking-set.c: Likewise.
* lib/fenv-except-tracking-test.c: Likewise.
* lib/fenv-except-trapping.c: Likewise.
* lib/fenv-round.c: Likewise.
* lib/fflush.c: Likewise.
* lib/fileblocks.c: Likewise.
* lib/forkpty.c: Likewise.
* lib/fpending.c: Likewise.
* lib/fpurge.c: Likewise.
* lib/freadable.c: Likewise.
* lib/freadahead.c: Likewise.
* lib/freading.c: Likewise.
* lib/freadptr.c: Likewise.
* lib/freadseek.c: Likewise.
* lib/fseeko.c: Likewise.
* lib/fseterr.c: Likewise.
* lib/fsusage.c: Likewise.
* lib/fwritable.c: Likewise.
* lib/fwriting.c: Likewise.
* lib/getdomainname.c: Likewise.
* lib/idpriv-drop.c: Likewise.
* lib/idpriv-droptemp.c: Likewise.
* lib/limits.in.h: Likewise.
* lib/mbrtoc16.c: Likewise.
* lib/mbrtoc32.c: Likewise.
* lib/mbsrtoc32s-state.c: Likewise.
* lib/mbsrtowcs-state.c: Likewise.
* lib/mbtowc-lock.h: Likewise.
* lib/minmax.h: Likewise.
* lib/netdb.in.h: Likewise.
* lib/pipe-filter-ii.c: Likewise.
* lib/posix_openpt.c: Likewise.
* lib/ptsname_r.c: Likewise.
* lib/readutmp.c: Likewise.
* lib/readutmp.h: Likewise.
* lib/resource-ext.h: Likewise.
* lib/safe-read.h: Likewise.
* lib/safe-write.h: Likewise.
* lib/save-cwd.c: Likewise.
* lib/stdbool.in.h: Likewise.
* lib/striconv.c: Likewise.
* lib/striconveh.c: Likewise.
* lib/termcap.h: Likewise.
* lib/terminfo.h: Likewise.
* lib/unistd.in.h: Likewise.
* lib/vasnprintf.c: Likewise.
* lib/wcrtomb.c: Likewise.
* lib/wcsrtombs-state.c: Likewise.
* m4/fenv-environment.m4: Likewise.
* m4/fenv-exceptions-state.m4: Likewise.
* m4/fenv-exceptions-tracking.m4: Likewise.
* m4/fenv-rounding.m4: Likewise.
* m4/fmod.m4: Likewise.
* m4/getdomainname.m4: Likewise.
* m4/getloadavg.m4: Likewise.
* m4/getopt.m4: Likewise.
* m4/hypot.m4: Likewise.
* m4/hypotf.m4: Likewise.
* m4/hypotl.m4: Likewise.
* m4/iconv.m4: Likewise.
* m4/intl-thread-locale.m4: Likewise.
* m4/largefile.m4: Likewise.
* m4/libdl.m4: Likewise.
* m4/locale-ja.m4: Likewise.
* m4/locale_h.m4: Likewise.
* m4/log.m4: Likewise.
* m4/log10.m4: Likewise.
* m4/log10f.m4: Likewise.
* m4/logf.m4: Likewise.
* m4/modf.m4: Likewise.
* m4/modff.m4: Likewise.
* m4/modfl.m4: Likewise.
* m4/pthread-rwlock.m4: Likewise.
* m4/semaphore.m4: Likewise.
* m4/socklen.m4: Likewise.
* m4/stdint.m4: Likewise.
* m4/strtod.m4: Likewise.
* m4/strtof.m4: Likewise.
* m4/strtold.m4: Likewise.
* modules/sigsegv: Likewise.
* posix-modules: Likewise.
* pygnulib/GLImport.py: Likewise.
* tests/init.sh: Likewise.
* tests/test-echo.sh: Likewise.
* tests/test-isatty.c: Likewise.
* tests/test-math-h.c: Likewise.
* tests/test-nonblocking-pipe.h: Likewise.
* tests/test-nonblocking-socket.h: Likewise.
* tests/test-strtod.h: Likewise.
* tests/test-strtof.h: Likewise.
* tests/test-strtold.h: Likewise.
* tests/test-vasnprintf.c: Likewise.
* tests/test-vasnwprintf.c: Likewise.

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m4/strtof.m4

# strtof.m4
# serial 5
dnl Copyright (C) 2002-2003, 2006-2025 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 This file is offered as-is, without any warranty.

AC_DEFUN([gl_FUNC_STRTOF],
[
  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  dnl Test whether strtof is declared.
  dnl Don't call AC_FUNC_STRTOF, because it does not have the right guess
  dnl when cross-compiling.
  dnl Don't call AC_CHECK_FUNCS([strtof]) because it would collide with the
  dnl ac_cv_func_strtof variable set by the AC_FUNC_STRTOF macro.
  AC_CHECK_DECLS_ONCE([strtof])
  if test $ac_cv_have_decl_strtof != yes; then
    HAVE_STRTOF=0
  fi
  if test $HAVE_STRTOF = 1; then
    AC_DEFINE([HAVE_STRTOF], [1],
      [Define to 1 if you have the 'strtof' function.])
    AC_CACHE_CHECK([whether strtof obeys C99], [gl_cv_func_strtof_works],
      [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <float.h>
#include <math.h>
#include <errno.h>
/* Compare two numbers with ==.
   This is a separate function in order to disable compiler optimizations.  */
static int
numeric_equal (float x, float y)
{
  return x == y;
}
]], [[
  int result = 0;
  {
    /* In some old versions of Linux (2000 or before), strtof mis-parses
       strings with leading '+'.  */
    const char *string = " +69";
    char *term;
    float value = strtof (string, &term);
    if (value != 69 || term != (string + 4))
      result |= 1;
  }
  {
    /* Under Solaris 2.4, strtof returns the wrong value for the
       terminating character under some conditions.  */
    const char *string = "NaN";
    char *term;
    strtof (string, &term);
    if (term != string && *(term - 1) == 0)
      result |= 1;
  }
  {
    /* Older glibc and Cygwin mis-parse "-0x".  */
    const char *string = "-0x";
    char *term;
    float value = strtof (string, &term);
    float zero = 0.0f;
    if (1.0f / value != -1.0f / zero || term != (string + 2))
      result |= 2;
  }
  {
    /* Many platforms do not parse hex floats.  */
    const char *string = "0XaP+1";
    char *term;
    float value = strtof (string, &term);
    if (value != 20.0f || term != (string + 6))
      result |= 4;
  }
  {
    /* Many platforms do not parse infinities.  HP-UX 11.31 parses inf,
       but mistakenly sets errno.  */
    const char *string = "inf";
    char *term;
    float value;
    errno = 0;
    value = strtof (string, &term);
    if (value != HUGE_VAL || term != (string + 3) || errno)
      result |= 8;
  }
  {
    /* In mingw 5.0 without __USE_MINGW_ANSI_STDIO and __USE_MINGW_STRTOX,
       strtof does not set errno upon overflow.  */
    const char *string = "1e50";
    char *term;
    float value;
    errno = 0;
    value = strtof (string, &term);
    if (value != HUGE_VAL || term != (string + 4) || errno != ERANGE)
      result |= 8;
  }
  {
    /* glibc 2.7 and cygwin 1.5.24 misparse "nan()".  */
    const char *string = "nan()";
    char *term;
    float value = strtof (string, &term);
    if (numeric_equal (value, value) || term != (string + 5))
      result |= 16;
  }
  {
    /* Darwin 10.6.1 (macOS 10.6.6) misparses "nan(".  */
    const char *string = "nan(";
    char *term;
    float value = strtof (string, &term);
    if (numeric_equal (value, value) || term != (string + 3))
      result |= 16;
  }
#ifndef _MSC_VER /* On MSVC, this is expected behaviour.  */
  {
    /* In Cygwin 2.9 and mingw 5.0, strtof does not set errno upon
       gradual underflow.  */
    const char *string = "1e-40";
    char *term;
    float value;
    errno = 0;
    value = strtof (string, &term);
    if (term != (string + 5)
        || (value > 0.0f && value <= FLT_MIN && errno != ERANGE))
      result |= 32;
  }
#endif
  {
    /* In Cygwin 2.9 and mingw 5.0, strtof does not set errno upon
       flush-to-zero underflow.  */
    const char *string = "1E-100000";
    char *term;
    float value;
    errno = 0;
    value = strtof (string, &term);
    if (term != (string + 9) || (value == 0.0L && errno != ERANGE))
      result |= 64;
  }
  return result;
]])],
        [gl_cv_func_strtof_works=yes],
        [result=$?
         if expr $result '>=' 64 >/dev/null; then
           gl_cv_func_strtof_works="no (underflow problem)"
         else
           if expr $result '>=' 32 >/dev/null; then
             gl_cv_func_strtof_works="no (gradual underflow problem)"
           else
             gl_cv_func_strtof_works=no
           fi
         fi
        ],
        [dnl The last known bugs in glibc strtof(), as of this writing,
         dnl were fixed in version 2.8
         AC_EGREP_CPP([Lucky user],
           [
#include <features.h>
#ifdef __GNU_LIBRARY__
 #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8) || (__GLIBC__ > 2)) \
     && !defined __UCLIBC__
  Lucky user
 #endif
#endif
           ],
           [gl_cv_func_strtof_works="guessing yes"],
           [case "$host_os" in
                                  # Guess yes on musl systems.
              *-musl* | midipix*) gl_cv_func_strtof_works="guessing yes" ;;
                                  # Guess 'no (underflow problem)' on Cygwin.
              cygwin*)            gl_cv_func_strtof_works="guessing no (underflow problem)" ;;
                                  # Guess 'no (underflow problem)' on mingw.
                                  # (Although the results may vary depending on
                                  # __USE_MINGW_ANSI_STDIO and __USE_MINGW_STRTOX.)
              mingw* | windows*)  gl_cv_func_strtof_works="guessing no (underflow problem)" ;;
              *)                  gl_cv_func_strtof_works="$gl_cross_guess_normal" ;;
            esac
           ])
        ])
      ])
    case "$gl_cv_func_strtof_works" in
      *yes) ;;
      *)
        REPLACE_STRTOF=1
        case "$gl_cv_func_strtof_works" in
          *"no (underflow problem)")
            AC_DEFINE([STRTOF_HAS_UNDERFLOW_BUG], [1],
              [Define to 1 if strtof does not set errno upon flush-to-zero underflow.])
            ;;
          *"no (gradual underflow problem)")
            AC_DEFINE([STRTOF_HAS_GRADUAL_UNDERFLOW_PROBLEM], [1],
              [Define to 1 if strtof does not set errno upon gradual underflow.])
            ;;
        esac
        ;;
    esac
  fi
])

# Prerequisites of lib/strtof.c.
AC_DEFUN([gl_PREREQ_STRTOF], [
  AC_REQUIRE([gl_CHECK_LDEXPF_NO_LIBM])
  if test $gl_cv_func_ldexpf_no_libm = yes; then
    AC_DEFINE([HAVE_LDEXPF_IN_LIBC], [1],
      [Define if the ldexpf function is available in libc.])
  fi
  gl_CHECK_FUNCS_ANDROID([nl_langinfo], [[#include <langinfo.h>]])
])

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kc3-lang/gnulib/m4/strtof.m4

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m4/strtof.m4