OpenJDK 7 build fails on Snow Leopard

[Mike Swingler]

On Oct 2, 2009, at 6:06 PM, John Rose wrote:

> On Oct 1, 2009, at 12:01 PM, John Rose wrote:
>
>> On Oct 1, 2009, at 4:12 AM, Michael Franz wrote:
>>
>>> Snow Leopard has gcc-4.0 and gcc-4.2.  You can switch for the build
>>> by specifying CC=gcc-4.0 and CXX=g++-4.0 before/when calling make.
>>
>> Yippee!  Looks like I'm back in business on 10.6.  -- John
>
> With the current bsd-port plus unrelated MLVM patches I got a clean  
> Snow Leopard build.  It passed the MLVM regression tests.
>
> I had to use GCC 4.0 as Michael suggested.
>
> The 4.2 compiler is offering some porting resistance.  I put a patch  
> into MLVM which copes with the new "printf" warnings it generates:
>   http://hg.openjdk.java.net/mlvm/mlvm/hotspot/raw-file/f9a6cda5b465/snowleopard.patch
>
> This patch is a bunch of lint-type fixes, and works fine on GCC  
> 4.0.  (Haven't tested on Solaris, etc, but s.b. OK.)  It's probably  
> not worth the effort of pushing this patch upstream until we have a  
> working GCC 4.2 build.
>
> The current problem with GCC 4.2 is that when I build on x86_32, the  
> JVM crashes in at least two places:  Under -Xint mode, the JVMG mode  
> throws an assert on exit, and otherwise it throws asserts or crashes  
> in compiler-related code.  The 64-bit version of the JVM appears to  
> work, but I haven't exercised it much.
>
> Since I'm chasing other problems, I'm going to leave GCC 4.2 alone  
> for now.  If anyone wants to pick up this issue, help yourself to  
> snowleopard.patch above.

It might also be worth giving llvm-gcc a try, since that is what we  
use to compile the Java SE 6 in Snow Leopard. It uses gcc's front-end,  
and llvm's code generating back-end. I encountered similar crashes  
using GCC 4.2, and they don't look obvious to isolate, let alone  
resolve.

Mike Swingler
Java Runtime Engineer
Apple Inc.
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