 Warning About Ports, no xscale optimisations by default! |
OESF Forums > Distros, Development, and Model Specific Forums > Distro Support and Discussion > OpenBSD  |
 Feb 18 2006, 06:26 AM
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#1
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 Group: Members Posts: 1,248 Joined: 6-July 04 Member No.: 3,928  |
I don't know how many of you have actually built some of the stuff from ports like scummvm and SDL but I thought I should just mention something.
When you build Zaurus binaries from ports don't assume that they are being xscale optimised. They (I'm pretty sure about this) all being built as default arm binaries which makes them pretty slow, particularly if you have built things like ScummVM and libSDL. You can 'hint' to the build system that you want xscale binaries by doing the following before you make a port. export CFLAGS="-mcpu=xscale" export CPPFLAGS="-mcpu=xscale" in the case of libSDL this makes a significant difference in performance speed. Ideally once you have started the make on the port and it has passed the configure stage you should be checking that the -mcpu=xscale flag is being included in pretty much all the compile statements that fly by. Well worth a rebuild of a few things if you didn't do this  take note, if you just redo the make install it may look like the library has been replaced. it almost certainly won't have. you will probably have to do... pkg_add -r -F installed tarball.tgz Don't believe it until you see it being removed and re-added. - Andy |
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Feb 18 2006, 11:25 AM
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#2
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Group: Members Posts: 1,248 Joined: 6-July 04 Member No.: 3,928 |
Note the xscale binaries/libraries seem to be somewhat bigger than the standard ARM versions so I suggest you decide on performance critical things to build with these flags.
- Andy |
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Jul 29 2006, 01:19 PM
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#3
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 Group: Members Posts: 298 Joined: 8-July 06 From: United Kingdom for now.... Member No.: 10,349 |
Sweet! Thanks for the great info.
QUOTE(iamasmith @ Feb 18 2006, 07:25 PM) Note the xscale binaries/libraries seem to be somewhat bigger than the standard ARM versions so I suggest you decide on performance critical things to build with these flags.
- Andy  |
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Oct 19 2006, 04:02 AM
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#4
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 Group: Members Posts: 1,019 Joined: 15-February 05 From: France Member No.: 6,477 |
QUOTE(iamasmith @ Feb 18 2006, 09:25 PM) Note the xscale binaries/libraries seem to be somewhat bigger than the standard ARM versions so I suggest you decide on performance critical things to build with these flags. - Andy are you talking about ports in ftp://ftp.openbsd.org/pub/OpenBSD/snapshots/packages/arm/ ? do you mean that we should rebuild them with the xscale options ??? |
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Oct 19 2006, 11:45 AM
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#5
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Group: Members Posts: 1,248 Joined: 6-July 04 Member No.: 3,928 |
QUOTE(jpmatrix @ Oct 19 2006, 12:02 PM) QUOTE(iamasmith @ Feb 18 2006, 09:25 PM) Note the xscale binaries/libraries seem to be somewhat bigger than the standard ARM versions so I suggest you decide on performance critical things to build with these flags. - Andy are you talking about ports in ftp://ftp.openbsd.org/pub/OpenBSD/snapshots/packages/arm/ ? do you mean that we should rebuild them with the xscale options ??? Umm, see top of thread |
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