Only one is needed. Having both can cause problems.
I found 2 ports (lang/pypy, systutils/libisoburn) with this problem, which can
be seen:
$ cd /usr/ports/sysutils/libisoburn/ && make show=MODULES
lang/tcl x11/tk gnu lang/tcl
If MODULES=x11/tk then lang/tcl will be automatically added at the end.
A port with "MODULES = lang/tcl x11/tk" and "MODTK_VERSION=8.5"
will break if the default ports Tcl/Tk is 8.6
Using "MODULES=x11/tk" and "MODTK_VERSION=8.5" would be sufficient.
OK?
Stu
Index: Makefile
===================================================================
RCS file: /cvs/ports/lang/pypy/Makefile,v
retrieving revision 1.30
diff -u -p -u -p -r1.30 Makefile
--- Makefile 15 Dec 2017 16:47:34 -0000 1.30
+++ Makefile 24 Jul 2018 16:19:50 -0000
@@ -55,7 +55,7 @@ DISTFILES += ${BOOTSTRAP-${MACHINE_ARCH
# if adding archs, list *all* bootstraps in SUPDISTFILES
SUPDISTFILES = ${BOOTSTRAP-amd64}:0
-MODULES += lang/python lang/tcl x11/tk
+MODULES += lang/python x11/tk
MODPY_VERSION = 2.7
COMPILER = base-clang ports-gcc
Index: Makefile
===================================================================
RCS file: /cvs/ports/sysutils/libisoburn/Makefile,v
retrieving revision 1.1.1.1
diff -u -p -u -p -r1.1.1.1 Makefile
--- Makefile 19 Dec 2017 20:20:44 -0000 1.1.1.1
+++ Makefile 24 Jul 2018 16:20:35 -0000
@@ -22,7 +22,7 @@ MASTER_SITES = http://files.libburnia-pr
# GPLv2+
PERMIT_PACKAGE_CDROM = Yes
-MODULES = lang/tcl x11/tk
+MODULES = x11/tk
LIB_DEPENDS-main = sysutils/libisofs \
sysutils/libburn
