More changes to {pre,post}_<stage> stuff.

Rather than using a file for stuff like this, change them to be
functions in templates. Now if any template want to use them, it
can specify for example a {pre,post}_<stage>() shell function.

Also remove some NetBSD specific stuff that is not useful anymore.

--HG--
extra : convert_revision : b7157c61c92c05904e0e4d971268e5f018db46bc

templates/perl.tmpl

@@ -21,3 +21,20 @@ long_desc="
  collections of third-party modules."
 
 run_depends="glibc-2.8"
+
+pre_build()
+{
+	# This fixes the definitions that the perl binary uses to look at
+	# prefix and not XBPS_DESTDIR/MASTERDIR.
+
+	if [ "$XBPS_DESTDIR" != "/xbps" ]; then
+		sed -i -e "s|$XBPS_DESTDIR\/$pkgname-$version|/usr|g" \
+			$wrksrc/config.h
+	fi
+
+	sed -i -e "s|/usr/usr|/usr|g" $wrksrc/config.h
+
+	if [ "$XBPS_MASTERDIR" != "/" ]; then
+		sed -i -e "s|$XBPS_MASTERDIR||g" $wrksrc/config.h
+	fi
+}