llvm dev - Dec 2009 - [LLVMdev] Fw: LLVM 2.6 cygwin build fails

On Tue, Dec 8, 2009 at 8:26 PM, Anton Korobeynikov
<anton at korobeynikov.info> wrote:
>> I'm trying to build LLVM 2.6 (from svn branch release_26) on cygwin
>> 1.7, and I have the following errors with both GCC 3.4.4 and GCC 4.3.4
>>
>> llvm[2]: Linking Release Loadable Module profile_rt.dll
> Cygwin does not support dynamic linking (as any windows target).
> For the moment - you can just build tools and not the runtime via
> "make tools-only".
Thanks! What about the following patch?

commit cca46eac77c6a397aa85c903ba516165b85f98a9
Author: Gregory Petrosyan <gregory.petrosyan at gmail.com>
Date:   Tue Dec 8 21:11:55 2009 +0300

    GettingStarted: mention problems with dynamic linking on Windows

    Signed-off-by: Gregory Petrosyan <gregory.petrosyan at gmail.com>

diff --git a/docs/GettingStarted.html b/docs/GettingStarted.html
index 2e2200d..b1fce86 100644
--- a/docs/GettingStarted.html
+++ b/docs/GettingStarted.html
@@ -252,13 +252,15 @@ software you will need.</p>
 </tr>
 <tr>
   <td>Cygwin/Win32</td>
-  <td>x86<sup><a href="#pf_1">1</a>,<a
href="#pf_8">8</a></sup></td>
+  <td>x86<sup><a href="#pf_1">1</a>,<a
href="#pf_8">8</a>,
+    <a href="#pf_11">11</a></sup></td>
   <td>GCC 3.4.X, binutils 2.15</td>
 </tr>
 <tr>
   <td>MinGW/Win32</td>
   <td>x86<sup><a href="#pf_1">1</a>,<a
href="#pf_6">6</a>,
-     <a href="#pf_8">8</a>, <a
href="#pf_10">10</a></sup></td>
+    <a href="#pf_8">8</a>,<a
href="#pf_10">10</a>,
+    <a href="#pf_11">11</a></sup></td>
   <td>GCC 3.4.X, binutils 2.15</td>
 </tr>
 </table>
@@ -331,6 +333,9 @@ up</a></li>
     before any Windows-based versions such as Strawberry Perl and
     ActivePerl, as these have Windows-specifics that will cause the
     build to fail.</a></li>
+<li><a name="pf_11">At the moment, LLVM modules requiring
dynamic linking can
+    not be built on Windows. However, you can build LLVM tools using
+    <i>"make tools-only"</i>.</li>
 </ol>
 </div>

Forgot to include the mailing list, sorry.



----- Forwarded Message ----
> From: Samuel Crow <samuraileumas at yahoo.com>
> To: Gregory Petrosyan <gregory.petrosyan at gmail.com>
> Sent: Tue, December 8, 2009 1:05:43 PM
> Subject: Re: [LLVMdev] LLVM 2.6 cygwin build fails
> 
> Hi Gregory,
> 
> I think MSYS can build DLLs on Win32 so it's only the Cygwin version
that can
> not build the modules.
> 
> That's what our team is trying to do right now using LLVM-GCC.
> 
> --Sam Crow

>> I think MSYS can build DLLs on Win32 so it's only the Cygwin
version that can
>> not build the modules.
>> That's what our team is trying to do right now using LLVM-GCC.
The system does not matter.
The issue here is that on windows you cannot have undefined symbols in
the binaries. Thus there is no support for "loadable modules".

-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University