[RFC PATCH v2 4/7] objtool: add target architecture to usage

[Joe Lawrence <joe.lawrence@redhat.com>]

Display the target architecture in the objtool usage string so that
users can identify which arch variant of objtool they are running.  This
is useful when cross-compiling and automated testing.

Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
---
 tools/objtool/Makefile        | 3 ++-
 tools/objtool/builtin-check.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index a4484fd22a96..c73c80af5ef3 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -61,7 +61,8 @@ INCLUDES := -I$(srctree)/tools/include \
 	    -I$(srctree)/tools/lib
 
 OBJTOOL_CFLAGS  := -std=gnu11 -fomit-frame-pointer -O2 -g $(WARNINGS)	\
-		   $(INCLUDES) $(LIBELF_FLAGS) $(LIBXXHASH_CFLAGS) $(HOSTCFLAGS)
+		   $(INCLUDES) $(LIBELF_FLAGS) $(LIBXXHASH_CFLAGS) $(HOSTCFLAGS) \
+		   -DOBJTOOL_TARGET_ARCH=$(SRCARCH)
 
 OBJTOOL_LDFLAGS := $(LIBSUBCMD) $(LIBELF_LIBS) $(LIBXXHASH_LIBS) $(HOSTLDFLAGS)
 
diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c
index 75b11dc85010..64651d90986f 100644
--- a/tools/objtool/builtin-check.c
+++ b/tools/objtool/builtin-check.c
@@ -11,6 +11,7 @@
 #include <errno.h>
 #include <sys/stat.h>
 #include <sys/sendfile.h>
+#include <linux/stringify.h>
 #include <objtool/builtin.h>
 #include <objtool/objtool.h>
 #include <objtool/warn.h>
@@ -23,7 +24,7 @@ const char *objname;
 struct opts opts;
 
 static const char * const check_usage[] = {
-	"objtool <actions> [<options>] file.o",
+	"objtool <actions> [<options>] file-" __stringify(OBJTOOL_TARGET_ARCH) ".o",
 	NULL,
 };
 
-- 
2.55.0