Mercurial > gnulib
view m4/floorf.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
# floorf.m4 serial 15 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_FLOORF], [ m4_divert_text([DEFAULTS], [gl_floorf_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) dnl Persuade glibc <math.h> to declare floorf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether floorf() is declared. AC_CHECK_DECLS([floorf], , , [[#include <math.h>]]) if test "$ac_cv_have_decl_floorf" = yes; then dnl Test whether floorf() can be used without libm. gl_FUNC_FLOORF_LIBS if test "$FLOORF_LIBM" = "?"; then dnl Sun C 5.0 on Solaris declares floorf() and has it in the system-wide dnl libm.so, but not in the libm.so that the compiler uses. REPLACE_FLOORF=1 fi m4_ifdef([gl_FUNC_FLOORF_IEEE], [ if test $gl_floorf_required = ieee && test $REPLACE_FLOORF = 0; then AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether floorf works according to ISO C 99 with IEC 60559], [gl_cv_func_floorf_ieee], [ save_LIBS="$LIBS" LIBS="$LIBS $FLOORF_LIBM" AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> ]gl_FLOAT_MINUS_ZERO_CODE[ ]gl_FLOAT_SIGNBIT_CODE[ static float dummy (float f) { return 0; } int main (int argc, char *argv[]) { float (*my_floorf) (float) = argc ? floorf : dummy; /* Test whether floorf (-0.0f) is -0.0f. */ if (signbitf (minus_zerof) && !signbitf (my_floorf (minus_zerof))) return 1; return 0; } ]])], [gl_cv_func_floorf_ieee=yes], [gl_cv_func_floorf_ieee=no], [case "$host_os" in # Guess yes on glibc systems. *-gnu* | gnu*) gl_cv_func_floorf_ieee="guessing yes" ;; # Guess yes on native Windows. mingw*) gl_cv_func_floorf_ieee="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_floorf_ieee="guessing no" ;; esac ]) LIBS="$save_LIBS" ]) case "$gl_cv_func_floorf_ieee" in *yes) ;; *) REPLACE_FLOORF=1 ;; esac fi ]) else HAVE_DECL_FLOORF=0 fi if test $HAVE_DECL_FLOORF = 0 || test $REPLACE_FLOORF = 1; then dnl No libraries are needed to link lib/floorf.c. FLOORF_LIBM= fi AC_SUBST([FLOORF_LIBM]) ]) # Determines the libraries needed to get the floorf() function. # Sets FLOORF_LIBM. AC_DEFUN([gl_FUNC_FLOORF_LIBS], [ gl_CACHE_VAL_SILENT([gl_cv_func_floorf_libm], [ gl_cv_func_floorf_libm=? AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> float (*funcptr) (float) = floorf; float x;]], [[x = funcptr(x) + floorf(x);]])], [gl_cv_func_floorf_libm=]) if test "$gl_cv_func_floorf_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> float (*funcptr) (float) = floorf; float x;]], [[x = funcptr(x) + floorf(x);]])], [gl_cv_func_floorf_libm="-lm"]) LIBS="$save_LIBS" fi ]) FLOORF_LIBM="$gl_cv_func_floorf_libm" ])