David Holmes - Sun Microsystems wrote:
Do we need to be careful about the word "recommended" here? There is a
big difference between "compiles fine" and "works fine". Anyone using
alternate compilers to build the JDK (Hotspot in particular) may
encounter compiler specific bugs at runtime.
Do we have a big disclaimer/warning somewhere about this? Any bug
reports would need to include which compiler was used.
David Holmes
John Coomes said the following on 06/20/08 06:54:
Mario Torre ([EMAIL PROTECTED]) wrote:
Il giorno lun, 31/03/2008 alle 18.37 +0200, Clemens Eisserer ha
scritto:
Hello,
I wonder which version of GCC is recommended for building OpenJDK?
4.3 will probably not work out-of-the-box, should I downgrade to
4.2 or 4.1?
...
Thanks a lot, lg Clemens
I had to "steal" a couple of patches from icedtea to be able to build
hotspot with gcc 4-3, works fine otherwise.
FWIW, the fix for
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/
openjdk 6
went into the hotspot runtime repository a few days ago:
http://hg.openjdk.java.net/jdk7/hotspot-rt/hotspot/rev/f139919897d2
It should make its way up to jdk7/jdk7/hotspot fairly soon for jdk7
build 30 or 31. I expect that will allow hotspot to build on current
linux distros, but I haven't tried yet.
-John
Honestly, I think David has a really good point here. While it's
certainly a good idea to support a couple of different compilers on each
platform, I think we should be particular to chose a specific version of
each compiler, and declare that an "official" compiler.
That is, we really shouldn't try to support all the versions of GCC,
SunStudio, or Visual Studio. People should be encouraged to pick a
specific version, and then go with that for some time. If we don't do
this, then we end up having to support (and keep track of) all sorts of
workarounds for all the various sub-versions. e.g. gcc4.0, gcc4.2,
Visual Studio 2008, Visual Studio Express 2005, etc. Which, is a
complete waste of time.
I realize this a pain with the various Linux distros, since they all
tend to ship with a different gcc version as the default one. HOWEVER,
it isn't such a problem, as getting a "standard" gcc version is usually
simple, since the various Linux repositories now contain a wide
selection of them.
Maybe we need to update the READMEs and such with more explicit
instructions as to using specific versions of compilers.
And, speaking to the community as a whole, I think it would benefit
everyone if we could agree on single compiler versions to concentrate
effort on, to avoid duplication of effort and needless waste of time.
These standardized versions should be periodically reviewed of course
for consideration of being updated, but I'd think no more often than
yearly, if that.
--
Erik Trimble
Java System Support
Mailstop: usca22-123
Phone: x17195
Santa Clara, CA
Timezone: US/Pacific (GMT-0800)
