From a91a30e1105006c898bd94fec39d487be14caa34 Mon Sep 17 00:00:00 2001
From: Daniel Levin <daniel.levin@amd.com>
Date: Wed, 28 Aug 2024 00:28:19 -0500
Subject: [PATCH] Add 'dupbuild' as deprecated warning

Fixup after 8f47d5aa33c6c303a71093be2eac02672dfb2966

Since v1.12 ninja breaks compatibility with existing generators,
particularly bob build system, which always invokes ninja with
-w dupbuild=err

See: https://github.com/ARM-software/bob-build/blob/master/bob.bash

This patch should also be applied to the 'release' branch.
---
 src/ninja.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ninja.cc b/src/ninja.cc
index 2902359f15..8306147c20 100644
--- a/src/ninja.cc
+++ b/src/ninja.cc
@@ -1230,6 +1230,10 @@ bool WarningEnable(const string& name, Options* options) {
   } else if (name == "phonycycle=warn") {
     options->phony_cycle_should_err = false;
     return true;
+  } else if (name == "dupbuild=err" ||
+             name == "dupbuild=warn") {
+    Warning("deprecated warning 'dupbuild'");
+    return true;
   } else if (name == "depfilemulti=err" ||
              name == "depfilemulti=warn") {
     Warning("deprecated warning 'depfilemulti'");