Mercurial > gnulib
view m4/ceill.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.
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* 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.
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* 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.
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* m4/mkfifo.m4: Likewise.
* m4/mknod.m4: Likewise.
* m4/mkstemp.m4: Likewise.
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* 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 |
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# ceill.m4 serial 17 dnl Copyright (C) 2007, 2009-2017 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_CEILL], [ m4_divert_text([DEFAULTS], [gl_ceill_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles dnl Persuade glibc <math.h> to declare ceill(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether ceill() is declared. AC_CHECK_DECLS([ceill], , , [[#include <math.h>]]) if test "$ac_cv_have_decl_ceill" = yes; then dnl Test whether ceill() can be used without libm. gl_FUNC_CEILL_LIBS if test "$CEILL_LIBM" = "?"; then dnl Sun C 5.0 on Solaris declares ceill() and has it in the system-wide dnl libm.so, but not in the libm.so that the compiler uses. REPLACE_CEILL=1 fi m4_ifdef([gl_FUNC_CEILL_IEEE], [ if test $gl_ceill_required = ieee && test $REPLACE_CEILL = 0; then AC_CACHE_CHECK([whether ceill works according to ISO C 99 with IEC 60559], [gl_cv_func_ceill_ieee], [ save_LIBS="$LIBS" LIBS="$LIBS $CEILL_LIBM" AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> ]gl_LONG_DOUBLE_MINUS_ZERO_CODE[ ]gl_LONG_DOUBLE_SIGNBIT_CODE[ static long double dummy (long double f) { return 0; } int main (int argc, char *argv[]) { long double (*my_ceill) (long double) = argc ? ceill : dummy; /* Test whether ceill (-0.3L) is -0.0L. */ if (signbitl (minus_zerol) && !signbitl (my_ceill (-0.3L))) return 1; return 0; } ]])], [gl_cv_func_ceill_ieee=yes], [gl_cv_func_ceill_ieee=no], [case "$host_os" in # Guess yes on glibc systems. *-gnu* | gnu*) gl_cv_func_ceill_ieee="guessing yes" ;; # Guess yes on native Windows. mingw*) gl_cv_func_ceill_ieee="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_ceill_ieee="guessing no" ;; esac ]) LIBS="$save_LIBS" ]) case "$gl_cv_func_ceill_ieee" in *yes) ;; *) REPLACE_CEILL=1 ;; esac fi ]) else HAVE_DECL_CEILL=0 fi dnl On OpenBSD5.6 the system's native ceill() is buggy: dnl it returns '0' for small values. Test for this anomaly. if test $REPLACE_CEILL = 0 ; then AC_CACHE_CHECK([whether ceill() breaks with small values], [gl_cv_func_ceill_buggy], [ save_LIBS="$LIBS" LIBS="$CEILL_LIBM" AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#include <math.h> long double d = 0.3L;]], [[return (!(ceill (d) == 1)); ]])], [gl_cv_func_ceill_buggy=no], [gl_cv_func_ceill_buggy=yes], [case "$host_os" in openbsd*) gl_cv_func_ceill_buggy="guessing yes" ;; # Guess no on native Windows. mingw*) gl_cv_func_ceill_buggy="guessing no" ;; *) gl_cv_func_ceill_buggy="guessing no" ;; esac ]) LIBS="$save_LIBS" ]) case "$gl_cv_func_ceill_buggy" in *yes) REPLACE_CEILL=1 ;; esac fi if test $HAVE_DECL_CEILL = 0 || test $REPLACE_CEILL = 1; then dnl Find libraries needed to link lib/ceill.c. if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then AC_REQUIRE([gl_FUNC_CEIL]) CEILL_LIBM="$CEIL_LIBM" else CEILL_LIBM= fi fi AC_SUBST([CEILL_LIBM]) ]) # Determines the libraries needed to get the ceill() function. # Sets CEILL_LIBM. AC_DEFUN([gl_FUNC_CEILL_LIBS], [ gl_CACHE_VAL_SILENT([gl_cv_func_ceill_libm], [ gl_cv_func_ceill_libm=? AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> long double (*funcptr) (long double) = ceill; long double x;]], [[x = funcptr(x) + ceill(x);]])], [gl_cv_func_ceill_libm=]) if test "$gl_cv_func_ceill_libm" = "?"; then save_LIBS="$LIBS" LIBS="$LIBS -lm" AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> long double (*funcptr) (long double) = ceill; long double x;]], [[x = funcptr(x) + ceill(x);]])], [gl_cv_func_ceill_libm="-lm"]) LIBS="$save_LIBS" fi ]) CEILL_LIBM="$gl_cv_func_ceill_libm" ])