$NetBSD: patch-build__tools_mkpkgconfig,v 1.1 2012/12/11 08:22:48 jnemeth Exp $

--- build_tools/mkpkgconfig.orig	2011-08-25 15:29:56.000000000 +0000
+++ build_tools/mkpkgconfig
@@ -21,12 +21,15 @@ else
 fi
 
 ## Clean out CFLAGS for the spec file.
+## pkgsrc -- the regex below isn't sed compatible, so always use perl
+EXTREGEX="perl -pe"
 
 LOCAL_CFLAGS=`echo $CFLAGS | ${EXTREGEX} 's/\s*-pipe\s*//g' | ${EXTREGEX} 's/-[Wmp]\S*\s*//g' | \
   ${EXTREGEX} 's/-I(include|\.\.\/include) //g' | \
   ${EXTREGEX} 's/-DINSTALL_PREFIX=\S* //g' | \
   ${EXTREGEX} 's/-DASTERISK_VERSION=\S* //g' | \
-  ${EXTREGEX} 's/-DAST(ETCDIR|LIBDIR|VARLIBDIR|VARRUNDIR|SPOOLDIR|LOGDIR|CONFPATH|MODDIR|AGIDIR)=\S* //g'`
+  ${EXTREGEX} 's/-DAST(ETCDIR|LIBDIR|VARLIBDIR|VARRUNDIR|SPOOLDIR|LOGDIR|CONFPATH|MODDIR|AGIDIR)=\S* //g' | \
+  ${EXTREGEX} "s;${WRKSRC};${PREFIX};g"`
 
 
 cat <<EOF > "$PPATH/asterisk.pc"