hypotl.m4

Branch

Show log
Commit

Hash : b1fcec6d
Author :
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.

Download

m4/hypotl.m4

# hypotl.m4
# serial 17
dnl Copyright (C) 2012-2025 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_HYPOTL],
[
  m4_divert_text([DEFAULTS], [gl_hypotl_required=plain])
  AC_REQUIRE([gl_MATH_H_DEFAULTS])
  AC_REQUIRE([gl_FUNC_HYPOT])

  dnl Persuade glibc <math.h> to declare hypotl().
  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])

  dnl Test whether hypotl() exists. Assume that hypotl(), if it exists, is
  dnl defined in the same library as hypot().
  saved_LIBS="$LIBS"
  LIBS="$LIBS $HYPOT_LIBM"
  AC_CHECK_FUNCS([hypotl])
  LIBS="$saved_LIBS"
  if test $ac_cv_func_hypotl = yes; then
    HYPOTL_LIBM="$HYPOT_LIBM"

    saved_LIBS="$LIBS"
    LIBS="$LIBS $HYPOTL_LIBM"
    gl_FUNC_HYPOTL_WORKS
    LIBS="$saved_LIBS"
    case "$gl_cv_func_hypotl_works" in
      *yes) ;;
      *) REPLACE_HYPOTL=1 ;;
    esac

    m4_ifdef([gl_FUNC_HYPOTL_IEEE], [
      if test $gl_hypotl_required = ieee && test $REPLACE_HYPOTL = 0; then
        AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
        AC_CACHE_CHECK([whether hypotl works according to ISO C 99 with IEC 60559],
          [gl_cv_func_hypotl_ieee],
          [
            saved_LIBS="$LIBS"
            LIBS="$LIBS $HYPOTL_LIBM"
            AC_RUN_IFELSE(
              [AC_LANG_SOURCE([[
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
/* Compare two numbers with ==.
   This is a separate function in order to disable compiler optimizations.  */
static int
numeric_equal (long double x, long double y)
{
  return x == y;
}
static long double dummy (long double x, long double y) { return 0; }
long double zero;
long double one = 1.0L;
int main (int argc, char *argv[])
{
  long double (* volatile my_hypotl) (long double, long double) = argc ? hypotl : dummy;
  long double f;
  /* Test hypotl(NaN,Infinity).
     This test fails on native Windows.  */
  f = my_hypotl (zero / zero, one / zero);
  if (!numeric_equal (f, f))
    return 1;
  return 0;
}
              ]])],
              [gl_cv_func_hypotl_ieee=yes],
              [gl_cv_func_hypotl_ieee=no],
              [case "$host_os" in
                                     # Guess yes on glibc systems.
                 *-gnu* | gnu*)      gl_cv_func_hypotl_ieee="guessing yes" ;;
                                     # Guess yes on musl systems.
                 *-musl* | midipix*) gl_cv_func_hypotl_ieee="guessing yes" ;;
                                     # Guess yes on native Windows.
                 mingw* | windows*)  gl_cv_func_hypotl_ieee="guessing yes" ;;
                                     # If we don't know, obey --enable-cross-guesses.
                 *)                  gl_cv_func_hypotl_ieee="$gl_cross_guess_normal" ;;
               esac
              ])
            LIBS="$saved_LIBS"
          ])
        case "$gl_cv_func_hypotl_ieee" in
          *yes) ;;
          *) REPLACE_HYPOTL=1 ;;
        esac
      fi
    ])
  else
    HAVE_HYPOTL=0
    dnl If the function is declared but does not appear to exist, it may be
    dnl defined as an inline function. In order to avoid a conflict, we have
    dnl to define rpl_hypotl, not hypotl.
    AC_CHECK_DECLS([hypotl], [REPLACE_HYPOTL=1], , [[#include <math.h>]])
  fi
  if test $HAVE_HYPOTL = 0 || test $REPLACE_HYPOTL = 1; then
    dnl Find libraries needed to link lib/hypotl.c.
    if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
      HYPOTL_LIBM="$HYPOT_LIBM"
    else
      AC_REQUIRE([gl_FUNC_FABSL])
      AC_REQUIRE([gl_FUNC_FREXPL])
      AC_REQUIRE([gl_FUNC_LDEXPL])
      AC_REQUIRE([gl_FUNC_SQRTL])
      HYPOTL_LIBM=
      dnl Append $FABSL_LIBM to HYPOTL_LIBM, avoiding gratuitous duplicates.
      case " $HYPOTL_LIBM " in
        *" $FABSL_LIBM "*) ;;
        *) HYPOTL_LIBM="$HYPOTL_LIBM $FABSL_LIBM" ;;
      esac
      dnl Append $FREXPL_LIBM to HYPOTL_LIBM, avoiding gratuitous duplicates.
      case " $HYPOTL_LIBM " in
        *" $FREXPL_LIBM "*) ;;
        *) HYPOTL_LIBM="$HYPOTL_LIBM $FREXPL_LIBM" ;;
      esac
      dnl Append $LDEXPL_LIBM to HYPOTL_LIBM, avoiding gratuitous duplicates.
      case " $HYPOTL_LIBM " in
        *" $LDEXPL_LIBM "*) ;;
        *) HYPOTL_LIBM="$HYPOTL_LIBM $LDEXPL_LIBM" ;;
      esac
      dnl Append $SQRTL_LIBM to HYPOTL_LIBM, avoiding gratuitous duplicates.
      case " $HYPOTL_LIBM " in
        *" $SQRTL_LIBM "*) ;;
        *) HYPOTL_LIBM="$HYPOTL_LIBM $SQRTL_LIBM" ;;
      esac
    fi
  fi
  AC_SUBST([HYPOTL_LIBM])
])

dnl Test whether hypotl() works.
dnl On OpenBSD 5.1/SPARC,
dnl hypotl (2.5541394760659556563446062497337725156L, 7.7893454113437840832487794525518765265L)
dnl has rounding errors that eat up the last 8 to 9 decimal digits.
dnl On NetBSD 9.3, the result is accurate to only 16 digits.
AC_DEFUN([gl_FUNC_HYPOTL_WORKS],
[
  AC_REQUIRE([AC_PROG_CC])
  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  AC_CACHE_CHECK([whether hypotl works], [gl_cv_func_hypotl_works],
    [
      AC_RUN_IFELSE(
        [AC_LANG_SOURCE([[
#include <float.h>
#include <math.h>
static long double
my_ldexpl (long double x, int d)
{
  for (; d > 0; d--)
    x *= 2.0L;
  for (; d < 0; d++)
    x *= 0.5L;
  return x;
}
volatile long double x;
volatile long double y;
volatile long double z;
int main ()
{
  long double err;

  x = 2.5541394760659556563446062497337725156L;
  y = 7.7893454113437840832487794525518765265L;
  z = hypotl (x, y);
  err = z * z - (x * x + y * y);
  err = my_ldexpl (err, LDBL_MANT_DIG);
  if (err < 0)
    err = - err;
  if (err > 1000.0L)
    return 1;
  return 0;
}
]])],
        [gl_cv_func_hypotl_works=yes],
        [gl_cv_func_hypotl_works=no],
        [case "$host_os" in
           openbsd*)          gl_cv_func_hypotl_works="guessing no" ;;
                              # Guess yes on native Windows.
           mingw* | windows*) gl_cv_func_hypotl_works="guessing yes" ;;
           *)                 gl_cv_func_hypotl_works="guessing yes" ;;
         esac
        ])
    ])
])

Download

kc3-lang/gnulib/m4/hypotl.m4

Commit

m4/hypotl.m4