Simple diff for out-of-tree builds:
$ du -sh `make show='WRKSRC WRKBUILD'`
27.8M /tmp/pobj/tor-0.3.2.10/tor-0.3.2.10
94.4M /tmp/pobj/tor-0.3.2.10/build-amd64
Without the symlink, it would rebuild manuals using rst2man.
OK?
Index: Makefile
===================================================================
RCS file: /cvs/ports/net/tor/Makefile,v
retrieving revision 1.112
diff -u -p -r1.112 Makefile
--- Makefile 25 Apr 2018 12:54:15 -0000 1.112
+++ Makefile 6 May 2018 10:01:17 -0000
@@ -17,6 +17,7 @@ WANTLIB += c crypto event_core event_ext
MASTER_SITES= https://www.torproject.org/dist/
AUTOCONF_VERSION=2.69
+SEPARATE_BUILD= Yes
CONFIGURE_STYLE=autoconf
# PIE is already taken care of on a per-arch basis, and we have stack
protection
# anyway on FRAME_GROWS_DOWN archs.
@@ -32,5 +33,8 @@ DB_DIR= /var/tor
SUBST_VARS+= DB_DIR
FAKE_FLAGS= sysconfdir=${PREFIX}/share/examples
+
+pre-build:
+ ln -sf ${WRKSRC}/doc ${WRKBUILD}/
.include <bsd.port.mk>
