Further investigation of compiling w/ gcc 4.2.x -- Re: Hotspot compile issue w/ openjdk6-b07

[David Herron]

David Herron wrote:
> I'm trying to build on Ubuntu 8.04beta .. it comes with gcc 4.2.3 default
>
> Note that README-builds.html says to use gcc 4.1.x.  My Ubuntu 7.10 
> system has 4.1.x
>
> The compile fails on hotspot/src/share/vm/opto/classes.cpp saying
>
>    In file included from .../hotspot/src/share/vm/opto/classes.cpp:36:
>    .../hotspot/src/share/vm/opto/classes.hpp: In member function 
> 'virtual const Type* PartialSubtypeCheckNode::bottom_type() const':
>    .../hotspot/src/share/vm/opto/classes.hpp:309: internal compiler 
> error: Segmentation fault
>
> This doesn't happen on my Ubuntu 7.10 system ..

The above error is not currently happening.  I hadn't installed all the 
required -dev packages and have since installed them, and the above 
error disappeared.

However further along in the compile I had to make a few simple source 
changes to fix compile errors.  In hotspot a number of files are 
compiled with -Werror (which turns warnings into errors), and these had 
to do with instances of using a string constant as a "char *".  
Depending on the context I either changed a declaration of "char *" to 
"const char *" or otherwise cast'd the string constant to "char *".

Another change had to do with the MOTIF requirement.  There was email 
chatter a week or two ago on an internal mailing list about removing 
from OpenJDK6 the Motif dependency.  Is that the plan?  Currently 
installation of Motif (specifically the package libmotif-dev) seems to 
be required. 

I started with setting an environment variable MOTIF_REQUIRED=false.  
Running 'make sanity' still said that Motif was required.  I looked in 
jdk/make/common/shared/Sanity.gmk and the checks there seemed to be 
incorrect, so I simply commented out the check for Motif.  Later the 
compile reached AWT and in awt_util.c it had a hard requirement on a 
Motif header file.  At that point I went ahead and installed 
libmotif-dev to get it compiled.

My compile is still failing during the build of tools.jar -- it says

    error: class file for java.lang.annotation.Inherited not found




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