building part of jdk 8

[Pete Brunet]

On 2/20/12 1:25 PM, Fredrik Öhrström wrote:
> Den måndagen den 20:e februari 2012 skrev Pete 
>
>     >
>     > A fastdebug build is a combination of the variables VARIANT=DBG
>     and FASTDEBUG=true
>     > but it's been a long time since I looked at that. Proof is in
>     the pudding. Good Luck.
>
>  
>
>     Thanks Kelly, That's true.  Also, I hadn't realized that I need to use
>     target fastdebug_build at the top level and fastdebug at the lower
>     levels.
>
>  
> The new build system tries to avoid this confusion by simplifying the
> setup.
> ./configure --with-debug-level=slowdebug
> where debug level is release,fastdebug,slowdebug. This setting affects
> all repos, both hotspot and the jdk.
Hi Fredrik, I can't find any files named configure.  Is there further
documentation?  -Pete
>
> Previously the jdk build took so long time that it made sense to
> squeeze every version
> of hotspot binaries into the same hotspot build directory. (several
> different debug versions, even 32 and 64 bit on sparc platforms?)
> Since whatever you did, it was vital that you did not have to
> recompile the jdk. The result was the confusing pudding of files in
> the build directory.
>
> With the new build system, rebuilding the jdk is faster than
> rebuilding hotspot. You can therefore afford to create many many
> different configurations and build them all from the same source.
>
> This is why the configuration warns when you build more than one jvm.
> Typically on 32 bit platforms you want to supply
> --with-jvm-variants=server to only build the best jvm. By default,
> mimicing the old makefiles, the default on 32 bit is
> --with-jvm-variants=client,server,minimal resulting in a build that
> spends 75% of the build time building jvm variants.....
>
> //Fredrik
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