RFC: JamVM force -marm -g -O2 on ARM Linux.

[Xerxes Rånby]

Hi

JamVM currently fail to run on ARM Linux systems where gcc by default optimize for Thumb2.
This can be fixed by overriding the JamVM CFLAGS to skip thumb by enforcing the use of -marm -g -O2 .

When built on Ubuntu Natty the attached patch turn this:
buildbot at panda$ java -jamvm -version
Segmentation fault (core dumped)
(gdb) bt
#0  0x00000000 in ?? ()
#1  0x4020280e in free () from /lib/libc.so.6
#2  0x4020280e in free () from /lib/libc.so.6

Into this:
buildbot at panda$ java -jamvm -version
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8.3) (6b18-1.8.3-1ubuntu3)
JamVM (build 1.6.0-devel, inline-threaded interpreter with stack-caching)



For JamVM hackers:
Ok to push to JamVM git?

For Icedtea hackers:
Ok to push to HEAD and 1.10 release branch?

Cheers
Xerxes
-------------- next part --------------
A non-text attachment was scrubbed...
Name: jamvm-force-arm-marm.patch
Type: text/x-patch
Size: 696 bytes
Desc: not available
Url : http://mail.openjdk.java.net/pipermail/distro-pkg-dev/attachments/20110311/1c72e193/jamvm-force-arm-marm.patch