How to speed up Hotspot Build

[Kelly O'Hair]

If all you are working on is hotspot, you should be able to
use the hotspot/make/Makefile alone.

It will build hotspot and copy it into a jdk image for you.
Try 'make help'

-kto

Peng Du wrote:
> Hello, guys
> 
> Recently, I am working on some slight modifications of Hotspot VM 
> without touching the JDK part. So, I have to compile Hotspot quite 
> frequently. However, the build is awfully slow on my machine with a 
> Intel 2.4G dual core CPU, 3G memory, and OpenSUSE11. It takes about 2-3 
> hours for one build.
> 
> Here is the relevant fragment of my build script:
> ==================================
> export MAKE_VERBOSE=true
> export DEBUG_GDB3=true
> export ARCH_DATA_MODEL=32
> export ALT_PARALLEL_COMPILE_JOBS=4
> export HOTSPOT_BUILD_JOBS=4
> 
> export BUILD_HOTSPOT=true
> 
> export BUILD_LANGTOOLS=false
> export BUILD_JDK=false
> export BUILD_JAXP=false
> export BUILD_JAXWS=false
> export BUILD_CORBA=false
> export BUILD_DEPLOY=false
> export BUILD_J2SE=false
> 
> export DEV_ONLY=true
> export SKIP_DEBUG_BUILD=false
> export SKIP_FASTDEBUG_BUILD=true
> ==================================
> 
> Any ideas on how to tune this to speed up the build? Or, are there 
> problems with the script?
> 
> Thanks!
> 
> Peng Du
> 2/7/2009
>