[PATCH] kbuild: install-extmod-build: install kernel/kallsyms_internal.h

[Denis Benato <denis.benato@linux.dev>]

The tree staged by install-extmod-build contains no kernel/ files, but
since commit 4fafd1165b33 ("kallsyms: increase marker density to 16:1
to accelerate lookups") scripts/kallsyms.c includes
../kernel/kallsyms_internal.h.

install-extmod-build rebuilds the host programs inside the staged tree
whenever CC differs from HOSTCC (cross builds, or a ccache-wrapped CC).
scripts/kallsyms is hostprogs-always-y, so that rebuild fails with:

  scripts/kallsyms.c:39:10: fatal error: '../kernel/kallsyms_internal.h' file not found
     39 | #include "../kernel/kallsyms_internal.h"
        |          ^~~~~~~

Stage the header so the linux-headers-* and kernel-devel style packages
can rebuild scripts/kallsyms.

Fixes: 4fafd1165b33 ("kallsyms: increase marker density to 16:1 to accelerate lookups")
Assisted-by: ZCode:glm-5.3
Signed-off-by: Denis Benato <denis.benato@linux.dev>
---
 scripts/package/install-extmod-build | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scripts/package/install-extmod-build b/scripts/package/install-extmod-build
index f12e1ffe409eb..aad2cd59a37ba 100755
--- a/scripts/package/install-extmod-build
+++ b/scripts/package/install-extmod-build
@@ -20,6 +20,8 @@ mkdir -p "${destdir}"
 (
 	cd "${srctree}"
 	echo Makefile
+	# scripts/kallsyms.c includes this header
+	echo kernel/kallsyms_internal.h
 	find "arch/${SRCARCH}" -maxdepth 1 -name 'Makefile*'
 	find "arch/${SRCARCH}" -name generated -prune -o -name include -type d -print
 	find "arch/${SRCARCH}" -name Kbuild.platforms -o -name Platform
-- 
2.47.3