diff -r d32292c10d35 share/mk/bsd.patch.mk
--- a/share/mk/bsd.patch.mk	Sat Oct 07 02:57:30 2006 +0000
+++ b/share/mk/bsd.patch.mk	Sun Oct 08 21:06:07 2006 +0900
@@ -42,6 +42,9 @@ CLEANFILES?=
 
 .for _PSRC in ${SRCS:M*.no_obj.patch}
 .for _PC in ${_PSRC:T:C/(\.no_obj)?\.patch$//:S|,|/|g}
+.if !exists(${_PSRC})
+.error non-existent patch file ${_PSRC}
+.endif
 
 ${_PC}: _PATCHFILE ${CONTRIBDIR}/${_PC} ${_PSRC}
 
@@ -54,6 +57,9 @@ CLEANFILES:=	${CLEANFILES} ${_PC}
 
 .for _PSRC in ${SRCS:N*.no_obj.patch:M*.patch}
 .for _PC in ${_PSRC:T:C/(\.no_obj)?\.patch$//:S|,|/|g}
+.if !exists(${_PSRC})
+.error non-existent patch file ${_PSRC}
+.endif
 
 ${_PC}: _PATCHFILE ${CONTRIBDIR}/${_PC} ${_PSRC}