From de13c55d74e0e95aa3799ba132db668212721776 Mon Sep 17 00:00:00 2001
From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Wed, 16 Jan 2019 11:42:10 -0800
Subject: Ninja: support `SWIFT_MODULE_NAME` property

Add a new `SWIFT_MODULE_NAME` property that defaults to the target name.
This can be adjusted via `set_target_properties`.  This is needed as
otherwise, the first source file determines the module name.

Issue: #18800
---
 Source/cmNinjaTargetGenerator.cxx | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Source/cmNinjaTargetGenerator.cxx b/Source/cmNinjaTargetGenerator.cxx
index c959a04..edb0ef3 100644
--- a/Source/cmNinjaTargetGenerator.cxx
+++ b/Source/cmNinjaTargetGenerator.cxx
@@ -919,7 +919,12 @@ void cmNinjaTargetGenerator::WriteObjectBuildStatement(
     }
     vars["SWIFT_AUXILIARY_SOURCES"] = aux_sources;
 
-    vars["SWIFT_MODULE_NAME"] = this->GeneratorTarget->GetName();
+    if (const char* name =
+          this->GeneratorTarget->GetProperty("SWIFT_MODULE_NAME")) {
+      vars["SWIFT_MODULE_NAME"] = name;
+    } else {
+      vars["SWIFT_MODULE_NAME"] = this->GeneratorTarget->GetName();
+    }
   }
 
   if (!this->NeedDepTypeMSVC(language)) {
-- 
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