objtool: Fix libopcodes linking with static libraries

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Commit 436326bc52 ("objtool: fix build failure due to missing libopcodes
check") tests for libopcodes using an empty main(), which passes even when
static libraries lack their dependencies. This causes undefined reference
errors (xmalloc, bfd_get_bits, etc.) when linking against static libopcodes
without its required libbfd and libiberty.

Fix by testing with an actual libopcodes symbol and trying increasingly
complete library combinations until one succeeds.

Fixes: 436326bc52 ("objtool: fix build failure due to missing libopcodes check")
Reported-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Link: https://patch.msgid.link/20260121162532.1596238-1-sashal@kernel.org

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Sasha Levin 2026-01-21 11:25:32 -05:00 • committed by Peter Zijlstra

parent 24d479d26b

commit 3f2de814c0

1 changed files with 17 additions and 4 deletions

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tools/objtool/Makefile

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