[PATCH 1/1] objdump: Fix disassembly if CROSS_COMPILE not set

[David Laight]

If CROSS_COMPILE isn't set and -v specified the code tries to run
	system("(null)objdump ....")
which really doesn't work very well.
Fix by changing NULL to "".

Fixes: ca653464dd097 ("objtool: Add verbose option for disassembling affected functions")
Signed-off-by: David Laight <david.laight.linux@xxxxxxxxx>
---
 tools/objtool/check.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 753dbc4f8198..c1b771e772fd 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -4506,6 +4506,8 @@ static int disas_funcs(const char *funcs)
 	char *cmd;
 
 	cross_compile = getenv("CROSS_COMPILE");
+	if (!cross_compile)
+		cross_compile = "";
 
 	objdump_str = "%sobjdump -wdr %s | gawk -M -v _funcs='%s' '"
 			"BEGIN { split(_funcs, funcs); }"
-- 
2.39.5