2 dnl Copyright (C) 2007-2020 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.
9 AC_REQUIRE([gl_MATH_H_DEFAULTS])
10 AC_REQUIRE([gl_FUNC_ISNANF])
11 AC_REQUIRE([gl_FUNC_ISNAND])
12 AC_REQUIRE([gl_FUNC_ISNANL])
14 # If we replaced any of the underlying isnan* functions, replace
15 # the isnan macro; it undoubtedly suffers from the same flaws.
16 AC_MSG_CHECKING([whether isnan macro works])
17 if test $gl_func_isnanf = yes \
18 && test $gl_func_isnand = yes \
19 && test $gl_func_isnanl = yes; then
22 dnl Append $ISNANF_LIBM to ISNAN_LIBM, avoiding gratuitous duplicates.
23 case " $ISNAN_LIBM " in
24 *" $ISNANF_LIBM "*) ;;
25 *) ISNAN_LIBM="$ISNAN_LIBM $ISNANF_LIBM" ;;
27 dnl Append $ISNAND_LIBM to ISNAN_LIBM, avoiding gratuitous duplicates.
28 case " $ISNAN_LIBM " in
29 *" $ISNAND_LIBM "*) ;;
30 *) ISNAN_LIBM="$ISNAN_LIBM $ISNAND_LIBM" ;;
32 dnl Append $ISNANL_LIBM to ISNAN_LIBM, avoiding gratuitous duplicates.
33 case " $ISNAN_LIBM " in
34 *" $ISNANL_LIBM "*) ;;
35 *) ISNAN_LIBM="$ISNAN_LIBM $ISNANL_LIBM" ;;
39 dnl REPLACE_ISNAN=1 also makes sure the rpl_isnan[fdl] functions get built.
43 AC_SUBST([ISNAN_LIBM])