From fd2dccf5172ab4a037ff41ef30c42208b54b0cfc Mon Sep 17 00:00:00 2001
From: Tarun Karuturi <tkaruturi@meta.com>
Date: Tue, 23 Jul 2024 16:56:24 -0700
Subject: [PATCH] Fix log.cpp when compiled with
 `executorch.enable_et_log=false` (#4358)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/4358

Currently, the ASR execution fails with the following error:
`xplat/executorch/runtime/platform/log.cpp:21:25: error: unused variable 'kMaxLogMessageLength' [-Werror,-Wunused-const-variable]` (P1484525874).

This diff marks kMaxLogMessageLength as `maybe_unused`.

Reviewed By: dbort, dvorjackz

Differential Revision: D59641404

fbshipit-source-id: 2a7e324206eb5a31e309dadc4ee3d6c5dc6f68dc
---
 runtime/platform/log.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/runtime/platform/log.cpp b/runtime/platform/log.cpp
index c60b47392e..2c618e8fd9 100644
--- a/runtime/platform/log.cpp
+++ b/runtime/platform/log.cpp
@@ -17,9 +17,6 @@ namespace torch {
 namespace executor {
 namespace internal {
 
-/// Maximum length of a log message.
-static constexpr size_t kMaxLogMessageLength = 256;
-
 /**
  * Get the current timestamp to construct a log event.
  *
@@ -85,6 +82,8 @@ void vlogf(
     va_list args) {
 #if ET_LOG_ENABLED
 
+  // Maximum length of a log message.
+  static constexpr size_t kMaxLogMessageLength = 256;
   char buf[kMaxLogMessageLength];
   size_t len = vsnprintf(buf, kMaxLogMessageLength, format, args);
   if (len >= kMaxLogMessageLength - 1) {