diff --git a/etc/mtree/BSD.usr.dist b/etc/mtree/BSD.usr.dist
--- a/etc/mtree/BSD.usr.dist
+++ b/etc/mtree/BSD.usr.dist
@@ -57,6 +57,8 @@
                 lib
                     freebsd
                     ..
+                share
+                    ..
                 ..
             ..
         ..
diff --git a/lib/libclang_rt/asan/Makefile b/lib/libclang_rt/asan/Makefile
--- a/lib/libclang_rt/asan/Makefile
+++ b/lib/libclang_rt/asan/Makefile
@@ -80,4 +80,7 @@
 SRCS+=		ubsan/ubsan_monitor.cpp
 SRCS+=		ubsan/ubsan_value.cpp
 
+FILESDIR=	${SANITIZER_SHAREDIR}
+FILES+=		asan/asan_ignorelist.txt
+
 .include <bsd.lib.mk>
diff --git a/lib/libclang_rt/cfi/Makefile b/lib/libclang_rt/cfi/Makefile
--- a/lib/libclang_rt/cfi/Makefile
+++ b/lib/libclang_rt/cfi/Makefile
@@ -36,4 +36,7 @@
 SRCS+=		sanitizer_common/sanitizer_tls_get_addr.cpp
 SRCS+=		sanitizer_common/sanitizer_type_traits.cpp
 
+FILESDIR=	${SANITIZER_SHAREDIR}
+FILES+=		cfi/cfi_ignorelist.txt
+
 .include <bsd.lib.mk>
diff --git a/lib/libclang_rt/compiler-rt-vars.mk b/lib/libclang_rt/compiler-rt-vars.mk
--- a/lib/libclang_rt/compiler-rt-vars.mk
+++ b/lib/libclang_rt/compiler-rt-vars.mk
@@ -1,6 +1,7 @@
 CLANG_SUBDIR=clang/14.0.3
 CLANGDIR=	/usr/lib/${CLANG_SUBDIR}
 SANITIZER_LIBDIR=		${CLANGDIR}/lib/freebsd
+SANITIZER_SHAREDIR=		${CLANGDIR}/share
 
 # armv[67] is a bit special since we allow a soft-floating version via
 # CPUTYPE matching *soft*. This variant may not actually work though.
diff --git a/lib/libclang_rt/msan/Makefile b/lib/libclang_rt/msan/Makefile
--- a/lib/libclang_rt/msan/Makefile
+++ b/lib/libclang_rt/msan/Makefile
@@ -64,4 +64,7 @@
 SRCS+=		ubsan/ubsan_monitor.cpp
 SRCS+=		ubsan/ubsan_value.cpp
 
+FILESDIR=	${SANITIZER_SHAREDIR}
+FILES+=		msan/msan_ignorelist.txt
+
 .include <bsd.lib.mk>
diff --git a/tools/build/mk/OptionalObsoleteFiles.inc b/tools/build/mk/OptionalObsoleteFiles.inc
--- a/tools/build/mk/OptionalObsoleteFiles.inc
+++ b/tools/build/mk/OptionalObsoleteFiles.inc
@@ -1488,6 +1488,10 @@
 OLD_FILES+=usr/lib/clang/14.0.3/lib/freebsd/libclang_rt.xray-x86_64.a
 OLD_DIRS+=usr/lib/clang/14.0.3/lib/freebsd
 OLD_DIRS+=usr/lib/clang/14.0.3/lib
+OLD_FILES+=usr/lib/clang/14.0.3/share/asan_ignorelist.txt
+OLD_FILES+=usr/lib/clang/14.0.3/share/cfi_ignorelist.txt
+OLD_FILES+=usr/lib/clang/14.0.3/share/msan_ignorelist.txt
+OLD_DIRS+=usr/lib/clang/14.0.3/share
 OLD_DIRS+=usr/lib/clang/14.0.3
 OLD_DIRS+=usr/lib/clang
 OLD_FILES+=usr/share/doc/llvm/clang/LICENSE.TXT