From a261f6dff3c1653c19c065c3b3650c625447b8a7 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 6 Mar 2026 17:33:07 +0100 Subject: [PATCH] check-uapi: link into shared objects MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit While testing ABI changes across all architectures, I found that abidiff sometimes produces nonsensical output. Further debugging identified missing or broken libelf support for architecture specific relocations in ET_REL binaries as the source of the problem[1]. Change the script to no longer produce a relocatable object file but instead create a shared library for each header. This makes abidiff work for all of the architectures in upstream linux kernels. Link: https://sourceware.org/bugzilla/show_bug.cgi?id=33869 Cc: stable@vger.kernel.org Signed-off-by: Arnd Bergmann Reviewed-by: Thomas Weißschuh Acked-by: Nathan Chancellor Link: https://patch.msgid.link/20260306163309.2015837-2-arnd@kernel.org Signed-off-by: Nicolas Schier --- scripts/check-uapi.sh | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/scripts/check-uapi.sh b/scripts/check-uapi.sh index 955581735cb3c..9fa45cbdecc25 100755 --- a/scripts/check-uapi.sh +++ b/scripts/check-uapi.sh @@ -178,8 +178,11 @@ do_compile() { local -r inc_dir="$1" local -r header="$2" local -r out="$3" - printf "int main(void) { return 0; }\n" | \ - "$CC" -c \ + printf "int f(void) { return 0; }\n" | \ + "$CC" \ + -shared \ + -nostdlib \ + -fPIC \ -o "$out" \ -x c \ -O0 \ -- 2.47.3