From: Arnd Bergmann Date: Fri, 6 Mar 2026 16:33:07 +0000 (+0100) Subject: check-uapi: link into shared objects X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a261f6dff3c1653c19c065c3b3650c625447b8a7;p=thirdparty%2Flinux.git check-uapi: link into shared objects 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 --- 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 \