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Under glibc, includes , which exposes ulong. Under musl, includes only , and , and does not include . As a result, ulong is not visible through the current selftests include chain. include/linux/types.h already defines both ulong and ullong in its sysv aliases block. tools/include/linux/types.h mirrors ullong but omits ulong. Add ulong alongside ullong to close the gap. Signed-off-by: Hisam Mehboob --- tools/include/linux/types.h | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/include/linux/types.h b/tools/include/linux/types.h index d41f8a261bce..ccc90dd4baeb 100644 --- a/tools/include/linux/types.h +++ b/tools/include/linux/types.h @@ -42,6 +42,7 @@ typedef __s16 s16; typedef __u8 u8; typedef __s8 s8; +typedef unsigned long ulong; typedef unsigned long long ullong; #ifdef __CHECKER__ -- 2.51.0