1 # remainderl.m4 serial 1
2 dnl Copyright (C) 2012 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_REMAINDERL],
9 AC_REQUIRE([gl_MATH_H_DEFAULTS])
10 AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
11 AC_REQUIRE([gl_FUNC_REMAINDER])
13 dnl Test whether remainderl() exists. Assume that remainderl(), if it exists, is
14 dnl defined in the same library as remainder().
16 LIBS="$LIBS $REMAINDER_LIBM"
17 AC_CACHE_CHECK([for remainderl],
18 [gl_cv_func_remainderl],
22 [[#ifndef __NO_MATH_INLINES
23 # define __NO_MATH_INLINES 1 /* for glibc */
26 long double (*funcptr) (long double, long double) = remainderl;
29 [[return funcptr (x, y) > 1
30 || remainderl (x, y) > 1;]])],
31 [gl_cv_func_remainderl=yes],
32 [gl_cv_func_remainderl=no])
35 if test $gl_cv_func_remainderl = yes; then
36 REMAINDERL_LIBM="$REMAINDER_LIBM"
39 dnl Find libraries needed to link lib/remainderl.c.
40 if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
41 REMAINDERL_LIBM="$REMAINDER_LIBM"
43 AC_REQUIRE([gl_FUNC_ROUNDL])
44 AC_REQUIRE([gl_FUNC_FMAL])
46 dnl Append $ROUNDL_LIBM to REMAINDERL_LIBM, avoiding gratuitous duplicates.
47 case " $REMAINDERL_LIBM " in
48 *" $ROUNDL_LIBM "*) ;;
49 *) REMAINDERL_LIBM="$REMAINDERL_LIBM $ROUNDL_LIBM" ;;
51 dnl Append $FMAL_LIBM to REMAINDERL_LIBM, avoiding gratuitous duplicates.
52 case " $REMAINDERL_LIBM " in
54 *) REMAINDERL_LIBM="$REMAINDERL_LIBM $FMAL_LIBM" ;;
58 AC_SUBST([REMAINDERL_LIBM])