From be56e6f7d0182b404bad4c7d41d847056e80a9b3 Mon Sep 17 00:00:00 2001
From: pavelsavara <pavel.savara@gmail.com>
Date: Fri, 23 Jan 2026 12:36:31 +0100
Subject: [PATCH 1/2] _EmcssLlvmsizeRsp

---
 src/mono/wasm/build/WasmApp.Native.targets | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/mono/wasm/build/WasmApp.Native.targets b/src/mono/wasm/build/WasmApp.Native.targets
index 7aa1203bd11551..600fc3e2684812 100644
--- a/src/mono/wasm/build/WasmApp.Native.targets
+++ b/src/mono/wasm/build/WasmApp.Native.targets
@@ -182,6 +182,9 @@
       <_MonoAotCrossCompilerPath>@(MonoAotCrossCompiler->WithMetadataValue('RuntimeIdentifier','browser-wasm'))</_MonoAotCrossCompilerPath>
       <_EmccDefaultFlagsRsp>$([MSBuild]::NormalizePath($(_WasmRuntimePackSrcDir), 'emcc-default.rsp'))</_EmccDefaultFlagsRsp>
       <_EmccDefaultLinkFlagsRsp>$([MSBuild]::NormalizePath($(_WasmRuntimePackSrcDir), 'emcc-link.rsp'))</_EmccDefaultLinkFlagsRsp>
+
+      <_EmcssLlvmsizeRsp>$(_WasmIntermediateOutputPath)emcc-llvmsize.rsp</_EmcssLlvmsizeRsp>
+
       <WasmLinkIcalls Condition="'$(WasmLinkIcalls)' == ''">$(WasmBuildNative)</WasmLinkIcalls>
 
       <_WasmICallTablePath>$(_WasmIntermediateOutputPath)icall-table.h</_WasmICallTablePath>
@@ -415,7 +418,14 @@
     </ItemGroup>
 
     <!-- for AOT builds we use llvm-size tool to collect size of the DATA segment in each object file -->
-    <Exec Command="llvm-size$(_ExeExt) -d --format=sysv @(_AOTObjectFile->'&quot;%(Identity)&quot;', ' ')"
+    <WriteLinesToFile 
+        Condition="'$(_WasmShouldAOT)' == 'true'"
+        Lines="@(_AOTObjectFile->'&quot;%(Identity)&quot;', ' ')" 
+        File="$(_EmcssLlvmsizeRsp)" 
+        Overwrite="true" 
+        WriteOnlyWhenDifferent="true" 
+        />
+    <Exec Command='llvm-size$(_ExeExt) -d --format=sysv  "@$(_EmcssLlvmsizeRsp)"'
           Condition="'$(_WasmShouldAOT)' == 'true'"
           IgnoreStandardErrorWarningFormat="true"
           ConsoleToMsBuild="true"

From 06b20677168bd68bab1e998319f44d2b5984fd24 Mon Sep 17 00:00:00 2001
From: pavelsavara <pavel.savara@gmail.com>
Date: Tue, 27 Jan 2026 18:49:16 +0100
Subject: [PATCH 2/2] feedback

---
 src/mono/wasm/build/WasmApp.Native.targets | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/mono/wasm/build/WasmApp.Native.targets b/src/mono/wasm/build/WasmApp.Native.targets
index 600fc3e2684812..11a3298e7f77f4 100644
--- a/src/mono/wasm/build/WasmApp.Native.targets
+++ b/src/mono/wasm/build/WasmApp.Native.targets
@@ -183,7 +183,7 @@
       <_EmccDefaultFlagsRsp>$([MSBuild]::NormalizePath($(_WasmRuntimePackSrcDir), 'emcc-default.rsp'))</_EmccDefaultFlagsRsp>
       <_EmccDefaultLinkFlagsRsp>$([MSBuild]::NormalizePath($(_WasmRuntimePackSrcDir), 'emcc-link.rsp'))</_EmccDefaultLinkFlagsRsp>
 
-      <_EmcssLlvmsizeRsp>$(_WasmIntermediateOutputPath)emcc-llvmsize.rsp</_EmcssLlvmsizeRsp>
+      <_WasmLlvmSizeRsp>$(_WasmIntermediateOutputPath)emcc-llvmsize.rsp</_WasmLlvmSizeRsp>
 
       <WasmLinkIcalls Condition="'$(WasmLinkIcalls)' == ''">$(WasmBuildNative)</WasmLinkIcalls>
 
@@ -420,12 +420,15 @@
     <!-- for AOT builds we use llvm-size tool to collect size of the DATA segment in each object file -->
     <WriteLinesToFile 
         Condition="'$(_WasmShouldAOT)' == 'true'"
-        Lines="@(_AOTObjectFile->'&quot;%(Identity)&quot;', ' ')" 
-        File="$(_EmcssLlvmsizeRsp)" 
+        Lines="@(_AOTObjectFile->'&quot;%(Identity)&quot;')" 
+        File="$(_WasmLlvmSizeRsp)" 
         Overwrite="true" 
         WriteOnlyWhenDifferent="true" 
         />
-    <Exec Command='llvm-size$(_ExeExt) -d --format=sysv  "@$(_EmcssLlvmsizeRsp)"'
+    <ItemGroup Condition="'$(_WasmShouldAOT)' == 'true'">
+      <FileWrites Include="$(_WasmLlvmSizeRsp)" />
+    </ItemGroup>
+    <Exec Command='llvm-size$(_ExeExt) -d --format=sysv  "@$(_WasmLlvmSizeRsp)"'
           Condition="'$(_WasmShouldAOT)' == 'true'"
           IgnoreStandardErrorWarningFormat="true"
           ConsoleToMsBuild="true"