# \[patch\] building Microsoft.Scripting.Metadata on Mono

**URL:** <https://www.ruby-forum.com/t/patch-building-microsoft-scripting-metadata-on-mono/191961>\
**Category:** IronRuby\
**Created:** [July 21, 2010, 11:28am UTC](https://www.ruby-forum.com/t/patch-building-microsoft-scripting-metadata-on-mono/191961 "2010-07-21T11:28:48Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Jb\_Evain](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/67e7ee/32.png) [@Jb\_Evain](https://www.ruby-forum.com/u/Jb_Evain)\
**Post date:** [July 21, 2010, 11:28am UTC](https://www.ruby-forum.com/t/patch-building-microsoft-scripting-metadata-on-mono/191961/1 "2010-07-21T11:28:48Z")

</div>

Hey,

Microsoft.Scripting.Metadata is being built with warnaserror, but it  
contains a couple of issues that are not detected by csc, but that are  
by dmcs, crashing the build. Here’s a fix:

\<\<\<\<\<\<  
diff --git a/Runtime/Microsoft.Scripting.Metadata/MemoryMapping.V2.cs  
b/Runtime/Microsoft.Scripting.Metadata/MemoryMapping.V2.cs  
index ddb9387…7ed9bd5 100644  
— a/Runtime/Microsoft.Scripting.Metadata/MemoryMapping.V2.cs  
+++ b/Runtime/Microsoft.Scripting.Metadata/MemoryMapping.V2.cs  
@@ -108,7 +108,6 @@ namespace Microsoft.Scripting.Metadata {  
int size;  
int fileDescriptor = 0;  
MemoryMapping mapping = null;

- 

```
       IntPtr ptr = IntPtr.Zero;

       // make sure we don't get interrupted before we save the

```

handle and the pointer:  
RuntimeHelpers.PrepareConstrainedRegions();  
diff --git a/Runtime/Microsoft.Scripting.Metadata/MetadataImport.cs  
b/Runtime/Microsoft.Scripting.Metadata/MetadataImport.cs  
index 22655c5…17c375a 100644  
— a/Runtime/Microsoft.Scripting.Metadata/MetadataImport.cs  
+++ b/Runtime/Microsoft.Scripting.Metadata/MetadataImport.cs  
@@ -1100,7 +1100,6 @@ namespace Microsoft.Scripting.Metadata {  
#region Dump  
#if DEBUG  
public unsafe void Dump(TextWriter output) {

- 

```
       IntPtr imageStart = (IntPtr)_image.Pointer;
       output.WriteLine("Image:");
       output.WriteLine(" {0}", _image.Length);
       output.WriteLine();

```

\<\<\<\<\<\<

Those variables aren’t used, triggering warnings, that are turned into  
errors.

And geez, looking at the code, you guys should have used cecil/light 😉

---

<div class="post-metadata">

**Author:** ![Jb\_Evain](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/67e7ee/32.png) [@Jb\_Evain](https://www.ruby-forum.com/u/Jb_Evain)\
**Post date:** [July 21, 2010, 6:29pm UTC](https://www.ruby-forum.com/t/patch-building-microsoft-scripting-metadata-on-mono/191961/2 "2010-07-21T18:29:46Z")

</div>

Thanks, I’ll fix it.

BTW: The code is based on CCI2 PE reader  
([http://ccimetadata.codeplex.com](http://ccimetadata.codeplex.com)).

Tomas