kc3-lang/gnulib/m4/isnan.m4

• Show log

  Commit

• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

Download

• m4/isnan.m4

• # isnan.m4 serial 5
  dnl Copyright (C) 2007-2023 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.
  
  AC_DEFUN([gl_ISNAN],
  [
    AC_REQUIRE([gl_MATH_H_DEFAULTS])
    AC_REQUIRE([gl_FUNC_ISNANF])
    AC_REQUIRE([gl_FUNC_ISNAND])
    AC_REQUIRE([gl_FUNC_ISNANL])
  
    # If we replaced any of the underlying isnan* functions, replace
    # the isnan macro; it undoubtedly suffers from the same flaws.
    AC_MSG_CHECKING([whether isnan macro works])
    if test $gl_func_isnanf = yes \
       && test $gl_func_isnand = yes \
       && test $gl_func_isnanl = yes; then
      AC_MSG_RESULT([yes])
      ISNAN_LIBM=
      dnl Append $ISNANF_LIBM to ISNAN_LIBM, avoiding gratuitous duplicates.
      case " $ISNAN_LIBM " in
        *" $ISNANF_LIBM "*) ;;
        *) ISNAN_LIBM="$ISNAN_LIBM $ISNANF_LIBM" ;;
      esac
      dnl Append $ISNAND_LIBM to ISNAN_LIBM, avoiding gratuitous duplicates.
      case " $ISNAN_LIBM " in
        *" $ISNAND_LIBM "*) ;;
        *) ISNAN_LIBM="$ISNAN_LIBM $ISNAND_LIBM" ;;
      esac
      dnl Append $ISNANL_LIBM to ISNAN_LIBM, avoiding gratuitous duplicates.
      case " $ISNAN_LIBM " in
        *" $ISNANL_LIBM "*) ;;
        *) ISNAN_LIBM="$ISNAN_LIBM $ISNANL_LIBM" ;;
      esac
    else
      AC_MSG_RESULT([no])
      dnl REPLACE_ISNAN=1 also makes sure the rpl_isnan[fdl] functions get built.
      REPLACE_ISNAN=1
      ISNAN_LIBM=
    fi
    AC_SUBST([ISNAN_LIBM])
  ])
  

Download