kerneldoc: update target name and requirement checks

Makefile

@@ -22,7 +22,7 @@
 # kernel              - buildkernel + installkernel.
 # kernel-toolchain    - Builds the subset of world necessary to build a kernel
 # kernel-toolchains   - Build kernel-toolchain for all universe targets.
-# doxygen             - Build API documentation of the kernel, needs doxygen.
+# kerneldoc           - Build API documentation of the kernel, needs doxygen, teTeX, and graphviz.
 # checkworld          - Run test suite on installed world.
 # check-old           - List obsolete directories/files/libraries.
 # check-old-dirs      - List obsolete directories.
@@ -159,9 +159,9 @@ TGTS=	all all-man buildenv buildenvvars buildetc buildkernel buildworld \
 	cleanworld cleanuniverse \
 	delete-old delete-old-dirs delete-old-files delete-old-libs \
 	depend distribute distributekernel distributekernel.debug \
-	distributeworld distrib-dirs distribution doxygen \
+	distributeworld distrib-dirs distribution \
 	everything hier hierarchy install installcheck installetc installkernel \
-	installkernel.debug packagekernel packageworld \
+	installkernel.debug kerneldoc packagekernel packageworld \
 	reinstallkernel reinstallkernel.debug \
 	installworld kernel-toolchain libraries maninstall \
 	list-old-dirs list-old-files list-old-libs \
@@ -801,7 +801,7 @@ universe_epilogue: .PHONY
 .MAKE.MODE= normal
 # Normally the things we run from here don't either.
 # Using -DWITH_META_MODE
-# we can buildworld with meta files created which are useful 
+# we can buildworld with meta files created which are useful
 # for debugging, but without any of the rest of a meta mode build.
 MK_DIRDEPS_BUILD= no
 MK_STAGING= no

Makefile.inc1

@@ -38,10 +38,10 @@
 
 #
 # The intended user-driven targets are:
-# buildworld  - rebuild *everything*, including glue to help do upgrades
-# installworld- install everything built by "buildworld"
-# checkworld  - run test suite on installed world
-# doxygen     - build API documentation of the kernel
+# buildworld   - rebuild *everything*, including glue to help do upgrades
+# installworld - install everything built by "buildworld"
+# checkworld   - run test suite on installed world
+# kerneldoc    - build API documentation of the kernel
 #
 # Standard targets (not defined here) are documented in the makefiles in
 # /usr/share/mk.  These include:
@@ -2378,15 +2378,23 @@ checkworld: .PHONY
 
 #
 #
-# doxygen
+# kerneldoc
 #
 # Build the API documentation with doxygen
 #
-doxygen: .PHONY
+kerneldoc: .PHONY
 	@if [ ! -x "${LOCALBASE}/bin/doxygen" ]; then \
 		echo "You need doxygen (devel/doxygen) to generate the API documentation of the kernel." | /usr/bin/fmt; \
 		exit 1; \
 	fi
+	@if [ ! -x "${LOCALBASE}/bin/tex" ]; then \
+		echo "You need teTeX (print/teTeX) to generate the API documentation of the kernel." | /usr/bin/fmt; \
+		exit 1; \
+	fi
+	@if [ ! -x "${LOCALBASE}/bin/dot" ]; then \
+		echo "You need graphviz (graphics/graphviz) to generate the API documentation of the kernel." | /usr/bin/fmt; \
+		exit 1; \
+	fi
 	${_+_}cd ${.CURDIR}/tools/kerneldoc/subsys; ${MAKE} obj all
 
 #