cwrappers stops apr building (NetBSD 7)

[Stephen Borrill <netbsd%precedence.co.uk@localhost>]

(slightly reformatted for clarity via email)

===> Building for apr-1.5.2
/bin/sh /usr/work/obj/pkgsrc/devel/apr/work.builder7/apr-1.5.2/libtool
	--silent --mode=compile gcc -pthread  -O2 -DHAVE_CONFIG_H  -DNETBSD
	-I./include
	-I/usr/work/obj/pkgsrc/devel/apr/work.builder7/apr-1.5.2/include/arch/unix
	-I./include/arch/unix
	-I/usr/work/obj/pkgsrc/devel/apr/work.builder7/apr-1.5.2/include/arch/unix
	-I/usr/work/obj/pkgsrc/devel/apr/work.builder7/apr-1.5.2/include
	-I/usr/work/obj/pkgsrc/devel/apr/work.builder7/apr-1.5.2/include/private
	-I/usr/work/obj/pkgsrc/devel/apr/work.builder7/apr-1.5.2/include/private
	-o encoding/apr_escape.lo -c encoding/apr_escape.c && touch encoding/apr_escape.lo
encoding/apr_escape.c:29:34: fatal error: apr_escape_test_char.h: No such file or directory
 #include "apr_escape_test_char.h"
                                  ^
compilation terminated.

apr_escape_test_char.h is in 
/usr/work/obj/pkgsrc/devel/apr/work.builder7/apr-1.5.2/include/private

It's not looking in any of the -I paths except the relative ones:

builder7# kdump | grep "cc.*NAMI.*apr_escape_test_char.h"
 28643      1 cc1      NAMI  "encoding/apr_escape_test_char.h"
 28643      1 cc1      NAMI  "./include/apr_escape_test_char.h"
 28643      1 cc1      NAMI  "./include/arch/unix/apr_escape_test_char.h"
 28643      1 cc1      NAMI  "/usr/obj/pkgsrc/devel/apr/work.builder7/.buildlink/include/apr_escape_test_char.h"
 28643      1 cc1      NAMI  "/usr/include/gcc-4.8/apr_escape_test_char.h"
 28643      1 cc1      NAMI  "/usr/include/gcc-4.8/apr_escape_test_char.h"
 28643      1 cc1      NAMI  "/usr/include/apr_escape_test_char.h"
 28643      1 cc1      NAMI  "/usr/include/apr_escape_test_char.h"

With USE_CWRAPPERS=no in /etc/mk.conf, compilation succeeds

--
Stephen