git: a93799b55d2d - stable/13 - kmod.mk: Use portable printf '%s' over non-portable echo -n

The branch stable/13 has been updated by jrtc27:

URL: https://cgit.FreeBSD.org/src/commit/?id=a93799b55d2d2feb552c4b2af9318bacb13d8104

commit a93799b55d2d2feb552c4b2af9318bacb13d8104
Author:     Jessica Clarke <jrtc27@FreeBSD.org>
AuthorDate: 2023-07-11 20:30:06 +0000
Commit:     Jessica Clarke <jrtc27@FreeBSD.org>
CommitDate: 2023-08-01 20:42:53 +0000

    kmod.mk: Use portable printf '%s' over non-portable echo -n
    
    Whilst /bin/echo on macOS and Linux implement -n, as do the builtin
    echos in bash and zsh, the builtin echo in dash does not, causing the
    first line of the output to be -n foo rather than just foo, and there to
    be an extra newline in the output and thus blank line, both of which
    result in "Symbol ... is not present in *.kld" warnings appearing in the
    build output (once for -n foo and once for the empty string for each
    module where EXPORT_SYMS is a list of symbols).
    
    MFC after:      1 week
    
    (cherry picked from commit d1e44bc94494448de196948d698b637b6e1df4bf)
---
 sys/conf/kmod.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/conf/kmod.mk b/sys/conf/kmod.mk
index 4a0d828f0159..777bd91a313b 100644
--- a/sys/conf/kmod.mk
+++ b/sys/conf/kmod.mk
@@ -275,7 +275,7 @@ ${FULLPROG}: ${OBJS}
 .if ${EXPORT_SYMS} == NO
 	:> export_syms
 .elif !exists(${.CURDIR}/${EXPORT_SYMS})
-	echo -n "${EXPORT_SYMS:@s@$s${.newline}@}" > export_syms
+	printf '%s' "${EXPORT_SYMS:@s@$s${.newline}@}" > export_syms
 .else
 	grep -v '^#' < ${EXPORT_SYMS} > export_syms
 .endif