mirror of
https://git.savannah.gnu.org/git/gnulib.git
synced 2026-10-24 00:48:56 +03:00
76 lines
2.4 KiB
Plaintext
76 lines
2.4 KiB
Plaintext
# floorl.m4
|
|
# serial 12
|
|
dnl Copyright (C) 2007, 2009-2026 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_FLOORL],
|
|
[
|
|
AC_REQUIRE([gl_MATH_H_DEFAULTS])
|
|
AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
|
|
|
|
dnl Persuade glibc <math.h> to declare floorl().
|
|
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
|
|
|
dnl Test whether floorl() is declared.
|
|
AC_CHECK_DECLS([floorl], , , [[#include <math.h>]])
|
|
if test "$ac_cv_have_decl_floorl" = yes; then
|
|
dnl Test whether floorl() can be used without libm.
|
|
gl_FUNC_FLOORL_LIBS
|
|
if test "$FLOORL_LIBM" = "?"; then
|
|
dnl Sun C 5.0 on Solaris declares floorl() and has it in the system-wide
|
|
dnl libm.so, but not in the libm.so that the compiler uses.
|
|
REPLACE_FLOORL=1
|
|
fi
|
|
else
|
|
HAVE_DECL_FLOORL=0
|
|
fi
|
|
if test $HAVE_DECL_FLOORL = 0 || test $REPLACE_FLOORL = 1; then
|
|
dnl Find libraries needed to link lib/floorl.c.
|
|
if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
|
|
AC_REQUIRE([gl_FUNC_FLOOR])
|
|
FLOORL_LIBM="$FLOOR_LIBM"
|
|
else
|
|
FLOORL_LIBM=
|
|
fi
|
|
fi
|
|
AC_SUBST([FLOORL_LIBM])
|
|
])
|
|
|
|
# Determines the libraries needed to get the floorl() function.
|
|
# Sets FLOORL_LIBM.
|
|
AC_DEFUN([gl_FUNC_FLOORL_LIBS],
|
|
[
|
|
gl_CACHE_VAL_SILENT([gl_cv_func_floorl_libm], [
|
|
gl_cv_func_floorl_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) = floorl;
|
|
long double x;]],
|
|
[[x = funcptr (x) + floorl(x);]])],
|
|
[gl_cv_func_floorl_libm=])
|
|
if test "$gl_cv_func_floorl_libm" = "?"; then
|
|
saved_LIBS="$LIBS"
|
|
LIBS="$LIBS -lm"
|
|
AC_LINK_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#ifndef __NO_MATH_INLINES
|
|
# define __NO_MATH_INLINES 1 /* for glibc */
|
|
#endif
|
|
#include <math.h>
|
|
long double (*funcptr) (long double) = floorl;
|
|
long double x;]],
|
|
[[x = funcptr (x) + floorl(x);]])],
|
|
[gl_cv_func_floorl_libm="-lm"])
|
|
LIBS="$saved_LIBS"
|
|
fi
|
|
])
|
|
FLOORL_LIBM="$gl_cv_func_floorl_libm"
|
|
])
|