[pkgsrc/trunk]: pkgsrc/graphics/graphviz graphics/graphviz: fix build with BS...

[rillig <rillig%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/6808295fd865
branches:  trunk
changeset: 436822:6808295fd865
user:      rillig <rillig%pkgsrc.org@localhost>
date:      Sun Aug 09 16:04:44 2020 +0000

description:
graphics/graphviz: fix build with BSD make

BSD make does not know the $< variable in explicit rules, it only knows
it for inference rules like ".c.o".  This resulted in $< expanding to an
empty string, which in turn got the build stuck because it tried to read
from stdin.  But not in parallel mode, where stdin was redirected to an
empty file, resulting in an empty PostScript file being installed.

Fixes PR pkg/55539.

diffstat:

 graphics/graphviz/Makefile |  5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diffs (19 lines):

diff -r dfacf9619c48 -r 6808295fd865 graphics/graphviz/Makefile
--- a/graphics/graphviz/Makefile        Sun Aug 09 15:51:21 2020 +0000
+++ b/graphics/graphviz/Makefile        Sun Aug 09 16:04:44 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.217 2020/08/03 22:38:22 tnn Exp $
+# $NetBSD: Makefile,v 1.218 2020/08/09 16:04:44 rillig Exp $
 
 DISTNAME=      graphviz-2.44.1
 CATEGORIES=    graphics
@@ -19,6 +19,9 @@
 USE_LANGUAGES=         c c++
 USE_LIBTOOL=           yes
 USE_TOOLS+=            automake bison flex groff pkg-config
+# GNU make is needed since BSD Make does not know $< in explicit rules,
+# such as used by lib/cdt/Makefile.am.
+USE_TOOLS+=            gmake
 GNU_CONFIGURE=         yes
 GNU_CONFIGURE_STRICT=  no # has sub-configures
 CONFIGURE_ARGS+=       --disable-java