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45 lines
1.5 KiB
Plaintext
45 lines
1.5 KiB
Plaintext
# isnan.m4 serial 5
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dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_ISNAN],
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[
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AC_REQUIRE([gl_MATH_H_DEFAULTS])
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AC_REQUIRE([gl_FUNC_ISNANF])
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AC_REQUIRE([gl_FUNC_ISNAND])
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AC_REQUIRE([gl_FUNC_ISNANL])
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# If we replaced any of the underlying isnan* functions, replace
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# the isnan macro; it undoubtedly suffers from the same flaws.
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AC_MSG_CHECKING([whether isnan macro works])
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if test $gl_func_isnanf = yes \
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&& test $gl_func_isnand = yes \
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&& test $gl_func_isnanl = yes; then
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AC_MSG_RESULT([yes])
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ISNAN_LIBM=
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dnl Append $ISNANF_LIBM to ISNAN_LIBM, avoiding gratuitous duplicates.
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case " $ISNAN_LIBM " in
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*" $ISNANF_LIBM "*) ;;
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*) ISNAN_LIBM="$ISNAN_LIBM $ISNANF_LIBM" ;;
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esac
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dnl Append $ISNAND_LIBM to ISNAN_LIBM, avoiding gratuitous duplicates.
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case " $ISNAN_LIBM " in
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*" $ISNAND_LIBM "*) ;;
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*) ISNAN_LIBM="$ISNAN_LIBM $ISNAND_LIBM" ;;
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esac
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dnl Append $ISNANL_LIBM to ISNAN_LIBM, avoiding gratuitous duplicates.
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case " $ISNAN_LIBM " in
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*" $ISNANL_LIBM "*) ;;
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*) ISNAN_LIBM="$ISNAN_LIBM $ISNANL_LIBM" ;;
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esac
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else
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AC_MSG_RESULT([no])
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dnl REPLACE_ISNAN=1 also makes sure the rpl_isnan[fdl] functions get built.
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REPLACE_ISNAN=1
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ISNAN_LIBM=
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fi
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AC_SUBST([ISNAN_LIBM])
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])
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