* [PATCH 1/3] check-uapi: link into shared objects
[not found] <20260306163309.2015837-1-arnd@kernel.org>
@ 2026-03-06 16:33 ` Arnd Bergmann
0 siblings, 0 replies; only message in thread
From: Arnd Bergmann @ 2026-03-06 16:33 UTC (permalink / raw)
To: linux-kbuild
Cc: Arnd Bergmann, Dodji Seketeli, John Moon, Nathan Chancellor,
Nicolas Schier, Thomas Weißschuh, libabigail, stable
From: Arnd Bergmann <arnd@arndb.de>
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 <arnd@arndb.de>
---
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 955581735cb3..9fa45cbdecc2 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 \
--
2.39.5
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