Mercurial > gnulib
view m4/remainder.m4 @ 39194:a84ae461a2f6
Add cross-compilation results for GNU/Hurd.
* m4/calloc.m4: Add GNU/Hurd guess.
* m4/cbrtl.m4: Likewise.
* m4/ceil.m4: Likewise.
* m4/ceilf.m4: Likewise.
* m4/ceill.m4: Likewise.
* m4/chown.m4: Likewise.
* m4/duplocale.m4: Likewise.
* m4/exp2l.m4: Likewise.
* m4/expm1.m4: Likewise.
* m4/fchdir.m4: Likewise.
* m4/floor.m4: Likewise.
* m4/floorf.m4: Likewise.
* m4/fmod.m4: Likewise.
* m4/fmodf.m4: Likewise.
* m4/fmodl.m4: Likewise.
* m4/getcwd.m4: Likewise.
* m4/getgroups.m4: Likewise.
* m4/gettimeofday.m4: Likewise.
* m4/hypot.m4: Likewise.
* m4/hypotf.m4: Likewise.
* m4/hypotl.m4: Likewise.
* m4/link-follow.m4: Likewise.
* m4/link.m4: Likewise.
* m4/linkat.m4: Likewise.
* m4/log.m4: Likewise.
* m4/log10.m4: Likewise.
* m4/log10f.m4: Likewise.
* m4/log1p.m4: Likewise.
* m4/log1pf.m4: Likewise.
* m4/log1pl.m4: Likewise.
* m4/log2.m4: Likewise.
* m4/log2f.m4: Likewise.
* m4/logf.m4: Likewise.
* m4/lstat.m4: Likewise.
* m4/malloc.m4: Likewise.
* m4/mbrlen.m4: Likewise.
* m4/mbrtowc.m4: Likewise.
* m4/mkdir.m4: Likewise.
* m4/mkfifo.m4: Likewise.
* m4/mknod.m4: Likewise.
* m4/mkstemp.m4: Likewise.
* m4/modf.m4: Likewise.
* m4/modff.m4: Likewise.
* m4/modfl.m4: Likewise.
* m4/printf.m4: Likewise.
* m4/pselect.m4: Likewise.
* m4/ptsname.m4: Likewise.
* m4/putenv.m4: Likewise.
* m4/readlink.m4: Likewise.
* m4/realloc.m4: Likewise.
* m4/remainder.m4: Likewise.
* m4/remainderf.m4: Likewise.
* m4/remainderl.m4: Likewise.
* m4/rmdir.m4: Likewise.
* m4/round.m4: Likewise.
* m4/roundf.m4: Likewise.
* m4/roundl.m4: Likewise.
* m4/select.m4: Likewise.
* m4/setenv.m4: Likewise.
* m4/signbit.m4: Likewise.
* m4/sleep.m4: Likewise.
* m4/stat.m4: Likewise.
* m4/strerror.m4: Likewise.
* m4/strtok_r.m4: Likewise.
* m4/symlink.m4: Likewise.
* m4/symlinkat.m4: Likewise.
* m4/trunc.m4: Likewise.
* m4/truncf.m4: Likewise.
* m4/truncl.m4: Likewise.
* m4/tzset.m4: Likewise.
* m4/ungetc.m4: Likewise.
* m4/usleep.m4: Likewise.
* m4/wcwidth.m4: Likewise.
author | Samuel Thibault <samuel.thibault@gnu.org> |
---|---|
date | Fri, 29 Dec 2017 17:30:07 +0100 |
parents | 5c951c71f25c |
children | 10eb9086bea0 |
line wrap: on
line source
# remainder.m4 serial 6 dnl Copyright (C) 2012-2017 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. AC_DEFUN([gl_FUNC_REMAINDER], [ m4_divert_text([DEFAULTS], [gl_remainder_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) dnl Test whether remainder() is declared. On IRIX 5.3 it is not declared. AC_CHECK_DECL([remainder], , [HAVE_DECL_REMAINDER=0], [[#include <math.h>]]) REMAINDER_LIBM= AC_CACHE_CHECK([whether remainder() can be used without linking with libm], [gl_cv_func_remainder_no_libm], [ AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> double x; double y;]], [[return remainder (x, y) > 1;]])], [gl_cv_func_remainder_no_libm=yes], [gl_cv_func_remainder_no_libm=no]) ]) if test $gl_cv_func_remainder_no_libm = no; then AC_CACHE_CHECK([whether remainder() can be used with libm], [gl_cv_func_remainder_in_libm], [ save_LIBS="$LIBS" LIBS="$LIBS -lm" AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> double x; double y;]], [[return remainder (x, y) > 1;]])], [gl_cv_func_remainder_in_libm=yes], [gl_cv_func_remainder_in_libm=no]) LIBS="$save_LIBS" ]) if test $gl_cv_func_remainder_in_libm = yes; then REMAINDER_LIBM=-lm fi fi if test $gl_cv_func_remainder_no_libm = yes \ || test $gl_cv_func_remainder_in_libm = yes; then : m4_ifdef([gl_FUNC_REMAINDER_IEEE], [ if test $gl_remainder_required = ieee && test $REPLACE_REMAINDER = 0; then AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether remainder works according to ISO C 99 with IEC 60559], [gl_cv_func_remainder_ieee], [ save_LIBS="$LIBS" LIBS="$LIBS $REMAINDER_LIBM" AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> /* Compare two numbers with ==. This is a separate function because IRIX 6.5 "cc -O" miscompiles an 'x == x' test. */ static int numeric_equal (double x, double y) { return x == y; } static double dummy (double x, double y) { return 0; } int main (int argc, char *argv[]) { double (*my_remainder) (double, double) = argc ? remainder : dummy; double f; /* Test remainder(...,0.0). This test fails on OSF/1 5.1. */ f = my_remainder (2.0, 0.0); if (numeric_equal (f, f)) return 1; return 0; } ]])], [gl_cv_func_remainder_ieee=yes], [gl_cv_func_remainder_ieee=no], [case "$host_os" in # Guess yes on glibc systems. *-gnu* | gnu*) gl_cv_func_remainder_ieee="guessing yes" ;; # Guess yes on native Windows. mingw*) gl_cv_func_remainder_ieee="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_remainder_ieee="guessing no" ;; esac ]) LIBS="$save_LIBS" ]) case "$gl_cv_func_remainder_ieee" in *yes) ;; *) REPLACE_REMAINDER=1 ;; esac fi ]) else HAVE_REMAINDER=0 fi if test $HAVE_REMAINDER = 0 || test $REPLACE_REMAINDER = 1; then dnl Find libraries needed to link lib/remainder.c. AC_REQUIRE([gl_FUNC_FABS]) AC_REQUIRE([gl_FUNC_FMOD]) AC_REQUIRE([gl_FUNC_ISNAND]) REMAINDER_LIBM= dnl Append $FABS_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates. case " $REMAINDER_LIBM " in *" $FABS_LIBM "*) ;; *) REMAINDER_LIBM="$REMAINDER_LIBM $FABS_LIBM" ;; esac dnl Append $FMOD_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates. case " $REMAINDER_LIBM " in *" $FMOD_LIBM "*) ;; *) REMAINDER_LIBM="$REMAINDER_LIBM $FMOD_LIBM" ;; esac dnl Append $ISNAND_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates. case " $REMAINDER_LIBM " in *" $ISNAND_LIBM "*) ;; *) REMAINDER_LIBM="$REMAINDER_LIBM $ISNAND_LIBM" ;; esac fi AC_SUBST([REMAINDER_LIBM]) ])