linux-kernel - [PATCH 2/2] scripts/bloat-o-meter: add -p argument

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Date:   Fri,  1 Jul 2022 14:35:13 +0300
From:   Nikolay Borisov <nborisov@...e.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org, Nikolay Borisov <nborisov@...e.com>
Subject: [PATCH 2/2] scripts/bloat-o-meter: add -p argument

When doing cross platform development on a machine sometimes it might be
useful to invoke bloat-o-meter for files which haven't been build with
the native toolchain. In cases when the host nm doesn't support
the target one then a toolchain-specific nm could be used. Add this
ability by adding the -p allowing invocations as:

./scripts/bloat-o-meter -p riscv64-unknown-linux-gnu- file1.o file2.o

Signed-off-by: Nikolay Borisov <nborisov@...e.com>
---
 scripts/bloat-o-meter | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/bloat-o-meter b/scripts/bloat-o-meter
index 2a360118710e..f9553f60a14a 100755
--- a/scripts/bloat-o-meter
+++ b/scripts/bloat-o-meter
@@ -17,6 +17,7 @@ group = parser.add_mutually_exclusive_group()
 group.add_argument('-c', help='categorize output based on symbol type', action='store_true')
 group.add_argument('-d', help='Show delta of Data Section', action='store_true')
 group.add_argument('-t', help='Show delta of text Section', action='store_true')
+parser.add_argument('-p', dest='prefix', help='Arch prefix for the tool being used. Useful in cross build scenarios')
 parser.add_argument('file1', help='First file to compare')
 parser.add_argument('file2', help='Second file to compare')
 
@@ -26,7 +27,11 @@ re_NUMBER = re.compile(r'\.[0-9]+')
 
 def getsizes(file, format):
     sym = {}
-    with os.popen("nm --size-sort " + file) as f:
+    nm = "nm"
+    if args.prefix:
+        nm = "{}nm".format(args.prefix)
+
+    with os.popen("{} --size-sort {}".format(nm, file)) as f:
         for line in f:
             if line.startswith("\n") or ":" in line:
                 continue
-- 
2.25.1