newlib/winsup/configure.cygwin

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addto_CPPFLAGS() {
local f
for f; do
case " $CPPFLAGS " in
*\ $f\ *) ;;
*) CPPFLAGS="$CPPFLAGS $f" ;;
esac
done
}
realdirpath() {
[ -z "$1" ] && return 1
(cd "$1" 2>/dev/null && pwd)
if test $? -ne 0; then
return 1
else
return 0
fi
}
for d in . .. ../.. ../../..; do
if test -e "$srcdir/$d/configure.cygwin"; then
winsup_srcdir=$(realdirpath "$srcdir/$d")
break
fi
done
if test -z "$winsup_srcdir"; then
echo "cannot find directory containing configure.cygwin" 1>&2
exit 1
fi
case "$srcdir" in
*/newlib*) lookfor=newlib ;;
*/winsup*) lookfor=winsup ;;
*) lookfor=. ;;
esac
for d in . .. ../.. ../../..; do
if test -d "$d/$lookfor"; then
target_builddir=$(realdirpath "$d")
break
fi
done
if test -z "$target_builddir"; then
echo "cannot determine top build dir, looking for $lookfor" 1>&2
exit 1
fi