1 # isnan.m4 serial 5 2 dnl Copyright (C) 2007-2012 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. 6 7 AC_DEFUN([gl_ISNAN], 8 [ 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]) 13 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 20 AC_MSG_RESULT([yes]) 21 ISNAN_LIBM= 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" ;; 26 esac 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" ;; 31 esac 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" ;; 36 esac 37 else 38 AC_MSG_RESULT([no]) 39 dnl REPLACE_ISNAN=1 also makes sure the rpl_isnan[fdl] functions get built. 40 REPLACE_ISNAN=1 41 ISNAN_LIBM= 42 fi 43 AC_SUBST([ISNAN_LIBM]) 44 ]) 45
