jdk8 makefile changes

[Kelly O'Hair]

A Windows tip:

  * On Windows, I use:      
              make BUILD_LOG_WRAPPER=   VERBOSE=   
      The logger tricks in the new makefiles seem to give Windows/CYGWIN grief, not all the time

-kto


On Jul 9, 2012, at 3:12 PM, Kelly O'Hair wrote:

> The jdk8/build forest has been in sync for a few days, so anyone willing to try the new build system with OpenJDK 8, please
> follow these instructions:
> 
>     hg clone http://hg.openjdk.java.net/jdk8/build jdk8-build
>     cd jdk8-build
>     sh ./get_source.sh
>     cd common/makefiles
>     ../autoconf/configure
>     make images
> 
> Let us know what works, what doesn't.
> 
> Many of us will be concentrating on binary comparisons over the next few days to insure that we are building
> everything we did before, and the same content.
> 
> -kto
> 
> On Jul 3, 2012, at 11:38 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
>