Index: Mk/Scripts/actual-package-depends.sh
===================================================================
--- Mk/Scripts/actual-package-depends.sh
+++ Mk/Scripts/actual-package-depends.sh
@@ -62,6 +62,11 @@
 	*)
 		searchfile=$(/usr/bin/which ${pattern} 2>/dev/null)
 		;;
+	*.pc)
+		prefix=$(pkgconf --variable=prefix ${pattern})
+		# plenty of pc files does not have prefix assume localbase in that case
+		searchfile=${prefix:-${LOCALBASE}}/libdata/pkgconfig/${pattern}
+		;;
 	esac
 	if [ -n "${searchfile}" ]; then
 		${PKG_BIN} which -q ${searchfile} || ${PKG_BIN} which -q "$(resolv_symlink ${searchfile} 2>/dev/null)" ||
Index: Mk/Scripts/do-depends.sh
===================================================================
--- Mk/Scripts/do-depends.sh
+++ Mk/Scripts/do-depends.sh
@@ -91,6 +91,16 @@
 	echo " - found (${libfile})"
 }
 
+find_pkgconf()
+{
+	echo -n "===>   ${dp_PKGNAME} depends on pc file: $1"
+	if ! pkgconf --exist ${1%.pc}; then
+		echo " - not found"
+		return 1
+	fi
+	echo " - found"
+}
+
 anynotfound=0
 err=0
 for _line in ${dp_RAWDEPENDS} ; do
@@ -144,6 +154,7 @@
 	  LIB_DEPENDS)
 	    case ${pattern} in
 	      lib*.so*)      fct=find_lib ;;
+	      *.pc) fct=find_pkgconf ;;
 	      *)
 		echo "Error: pattern ${pattern} in LIB_DEPENDS is not valid"
 		err=1
Index: Mk/bsd.port.mk
===================================================================
--- Mk/bsd.port.mk
+++ Mk/bsd.port.mk
@@ -3887,7 +3887,7 @@
 ################################################################
 
 .if !target(depends)
-depends: pkg-depends extract-depends patch-depends lib-depends fetch-depends build-depends run-depends
+depends: pkg-depends extract-depends patch-depends fetch-depends build-depends lib-depends run-depends
 
 .for deptype in PKG EXTRACT PATCH FETCH BUILD LIB RUN TEST
 ${deptype:tl}-depends:
@@ -4162,10 +4162,11 @@
 
 ACTUAL-PACKAGE-DEPENDS?= \
 	depfiles="" ; \
-	for lib in ${LIB_DEPENDS:C/\:.*//}; do \
+	for lib in ${LIB_DEPENDS:C/\:.*//:N*.pc}; do \
 		depfiles="$$depfiles `${SETENV} LIB_DIRS="${LIB_DIRS}" LOCALBASE="${LOCALBASE}" ${SH} ${SCRIPTSDIR}/find-lib.sh $${lib}`" ; \
 	done ; \
-	${SETENV} PKG_BIN="${PKG_BIN}" ${SH} ${SCRIPTSDIR}/actual-package-depends.sh $${depfiles} ${RUN_DEPENDS:C/(.*)\:.*/"\1"/}
+	depfiles="$$depfiles ${LIB_DEPENDS:C/\:.*//:M*.pc}" ; \
+	${SETENV} PKG_BIN="${PKG_BIN}" LOCALBASE="${LOCALBASE}" ${SH} ${SCRIPTSDIR}/actual-package-depends.sh $${depfiles} ${RUN_DEPENDS:C/(.*)\:.*/"\1"/}
 
 PKG_NOTES_ENV?=
 .for note in ${PKG_NOTES}
Index: Mk/bsd.sanity.mk
===================================================================
--- Mk/bsd.sanity.mk
+++ Mk/bsd.sanity.mk
@@ -75,7 +75,7 @@
 DEV_WARNING+=	"USE_GNOME=desktopfileutils is deprecated, please use USES=desktop-file-utils"
 .endif
 
-.if defined(LIB_DEPENDS) && ${LIB_DEPENDS:Nlib*}
+.if defined(LIB_DEPENDS) && ${LIB_DEPENDS:N*.pc:Nlib*}
 DEV_ERROR+=	"All LIB_DEPENDS should use the new format and start out with lib.  \(libfoo.so vs foo.so\)"
 .endif