jdk8 makefile changes
david.holmes at oracle.com
Tue Jul 10 02:24:14 UTC 2012
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
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:
> User Guide is at:
> 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) " " "
> * 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.
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