jdk8 makefile changes

[David Holmes]

Hi Kelly,

The full debug symbol support seems to have issues. In the old build we 
use ENABLE_FULL_DEBUG_SYMBOLS in both the JDK and Hotspot. In the new 
build we have ENABLE_DEBUG_SYMBOLS instead. This name difference means 
hotspot and the JDK are using different "flags" to control the same 
thing. :(

David
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On 4/07/2012 4:38 AM, Kelly O'Hair wrote:
>
> Heads up...
>
> We expect to do a sync up of the jdk8/build forest with the latest in the build-infra forest in the next few days.
>
> As the new build-infra project starts getting more solid and we contemplate when we can switch
> the default to building with the new build-infra Makefiles (we don't know exactly when yet).
>
>                  **** IMPORTANT NOTICE ****
> It will be important that *anyone* making *any* changes to the jdk8 Makefiles keep the build-dev
> or build-infra mailing lists informed.
> For a period of time we need to maintain two separate build mechanisms, and we want to make sure
> that both build the same thing.
> The hotspot repository is the one exception where we don't have two sets of makefiles, but we still
> would like to know when anyone is changing the makefiles or anything to do with the build process.
>                *****************************
>
> We will soon be running both builds and doing comparisons of the resulting j2sdk-image files from
> both to insure we match. So if we detect differences we will be tracking down how those differences
> happened (that's a hint that we will be watching :^).
>
> More information on the new build-infra Makefiles can be found at:
>     http://openjdk.java.net/projects/build-infra/
>
> User Guide is at:
>    http://openjdk.java.net/projects/build-infra/guide.html
>
> Some preliminary timings for building the product image (effectively, build/j2sdk-image/):
>     					OLD			NEW build-infra times      (All estimates, similar VMs/Zones)
>   linux_i586                	(21m 59s)		(08m 13s)
>   linux_x64                  	(13m 34s)		(07m 04s)
>   solaris_i586                	(26m 14s)		(11m 31s)
>   solaris_sparc              	(54m 02s)		(28m 21s)
>   windows_i586            	(55m 49s)		(32m 22s)  (old used MKS, build-infra only uses CYGWIN)
>   windows_x64            	(36m 36s)		(23m 50s)      "        "     "
>
> Notes:
>    * Machines with more processors will reduce the build time for build-infra builds, less so with the old Makefiles.
>    * Always use local disk or /tmp (all above timings use /tmp, always local disk)
>    * Above uses VMs for Windows and Linux, raw hardware would be faster
>    * Use of ccache can sometimes speed things up, but can also skew the timings,
>        in the above measurements OLD used ccache, NEW did not.
>
> -kto