[PATCH v2 4/4] objtool: Add explicitly sequenced -lzstd to libopcodes fallback

[Ian Rogers <irogers@google.com>]

Distributions like Fedora currently ship a statically compiled binutils
libbfd (an intrinsic dependency of libopcodes) that internally utilizes
zstd to decompress sections.

Because objtool resolves host dependencies sequentially via a manual HOSTCC
shell loop, build failures will occur (e.g. undefined reference to
'ZSTD_decompress') unless the loop probes for it.

Add the '-lopcodes -lbfd -liberty -lz -lzstd' combination to the fallback
chain, assuring successful compilation on hosts packaging static binutils.

Signed-off-by: Ian Rogers <irogers@google.com>
Assisted-by: Antigravity:gemini-3.1-pro
---
 tools/objtool/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index a4484fd22a96..141b957c566b 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -88,7 +88,8 @@ LIBOPCODES_LIBS := $(shell \
 	for libs in "-lopcodes" \
 		    "-lopcodes -lbfd" \
 		    "-lopcodes -lbfd -liberty" \
-		    "-lopcodes -lbfd -liberty -lz"; do \
+		    "-lopcodes -lbfd -liberty -lz" \
+		    "-lopcodes -lbfd -liberty -lz -lzstd"; do \
 		echo 'extern void disassemble_init_for_target(void *);' \
 		     'int main(void) { disassemble_init_for_target(0); return 0; }' | \
 			$(HOSTCC) -xc - -o /dev/null $$libs 2>/dev/null && \
-- 
2.55.0.1003.g10538fe699-goog