Hi all,

Running 'make links' in sys/kern works, but produces a confusing error
message on arm64:

  /bin/sh: cd: /usr/src/sys/lib/libkern/arch/aarch64 - No such file or directory

The ${DGEN} variable includes lib/libkern/arch/${MACHINE_ARCH}, but this
directory doesn't exist for all architectures. The patch below checks if
each directory exists before attempting to cd into it and avoids the
error message.

Thanks,
Thorsten

Index: kern/Makefile
===================================================================
RCS file: /cvs/src/sys/kern/Makefile,v
retrieving revision 1.53
diff -u -p -r1.53 Makefile
--- kern/Makefile	3 Nov 2024 07:58:42 -0000	1.53
+++ kern/Makefile	24 Oct 2025 08:40:27 -0000
@@ -53,6 +53,6 @@ links::
	rm -f ${SYSTAGS}
	ln -s ${SYSDIR}/arch/${MACHINE}/tags ${SYSTAGS}
	-for i in ${DGEN}; do \
-	    (cd ../$$i && { rm -f tags; ln -s ${SYSTAGS} tags; }) done
+	    ([ -d ../$$i ] && cd ../$$i && { rm -f tags; ln -s ${SYSTAGS} tags; }) done
	-for i in ${ARCH}; do \
	    (cd ../arch/$$i && make ${MFLAGS} SYSTAGS=${SYSTAGS} links); done