Hi,

I would like to commit the following diffs to devel/spidermonkey115 and
x11/gnome/tour.

It switches the ports to use MODULES+=lang/rust instead of
BUILD_DEPENDS+=lang/rust, and adds MODRUST_WANTLIB to WANTLIB.

It makes the ports to use _SYSTEM_VERSION-rust and be bumped
automatically when rust (compiler or stdlib) changes, and so get the
package updated.

Comments or OK ?
-- 
Sebastien Marie

Index: devel/spidermonkey115/Makefile
===================================================================
RCS file: /cvs/ports/devel/spidermonkey115/Makefile,v
diff -u -p -r1.3 Makefile
--- devel/spidermonkey115/Makefile	20 Dec 2023 13:58:42 -0000	1.3
+++ devel/spidermonkey115/Makefile	1 Jan 2024 16:14:29 -0000
@@ -30,9 +30,10 @@ EXTRACT_SUFX =		.tar.xz
 PERMIT_PACKAGE=	Yes
 
 WANTLIB += curses ffi icudata icui18n icuuc m nspr4 plc4 plds4 z
-WANTLIB += ${COMPILER_LIBCXX}
+WANTLIB += ${COMPILER_LIBCXX} ${MODRUST_WANTLIB}
 
-MODULES =		lang/python
+MODULES =		lang/python \
+			lang/rust
 
 MODPY_RUNDEP =		No
 
@@ -47,8 +48,7 @@ LIB_DEPENDS =		devel/libffi \
 
 DEBUG_PACKAGES =	${BUILD_PACKAGES}
 
-BUILD_DEPENDS =		devel/cbindgen \
-			lang/rust
+BUILD_DEPENDS =		devel/cbindgen
 
 SEPARATE_BUILD =	Yes
 WRKDIST =		${WRKDIR}/firefox-${V}

Index: x11/gnome/tour/Makefile
===================================================================
RCS file: /cvs/ports/x11/gnome/tour/Makefile,v
diff -u -p -r1.14 Makefile
--- x11/gnome/tour/Makefile	8 Nov 2023 18:49:09 -0000	1.14
+++ x11/gnome/tour/Makefile	1 Jan 2024 16:14:29 -0000
@@ -13,15 +13,14 @@ DISTFILES=		${GNOME_PROJECT}-${GNOME_VER
 # gnome-tour source code results in effective GPLv3+ for the resulting binary
 PERMIT_PACKAGE=		Yes
 
-WANTLIB += adwaita-1 c c++abi gio-2.0 glib-2.0 gobject-2.0 gtk-4
-WANTLIB += intl m pthread
+WANTLIB += ${MODRUST_WANTLIB}
+WANTLIB += adwaita-1 gio-2.0 glib-2.0 gobject-2.0 gtk-4 intl m
 
 MODULES=		devel/meson \
+			lang/rust \
 			x11/gnome
 
 MODGNOME_TOOLS=		desktop-file-utils gtk-update-icon-cache
-
-BUILD_DEPENDS=		lang/rust
 
 LIB_DEPENDS=		x11/gnome/libadwaita