On Mon, 12 Nov 2007 16:39:15 -0600
Frank Cox <theatre@xxxxxxxxxxx> wrote:
> Having just set this computer up with Fedora 8 x86_64, I am trying to compile
> dosemu to run on it. Note that this is (for now) a "pure" x86_64 system --
> there are no i386 libraries installed on it at all.
I got this figured out.
After doing the " rpmbuild --rebuild dosemu-1.4.0-1.src.rpm" step that errored
out as described in my previous message, I had a file named dosemu-1.4.0.tgz in
my ~/rpmbuild/SOURCES directory. I un-tarred that and after poking around a
bit I found a file named compiletime-settings. I changed the line in that file
that said libdir ${prefix}/lib to libdir ${prefix}/lib64
I then recreated dosemu-1.4.0.tgz in the ~/rpmbuild/SOURCES directory so it now
contained the modified compiletime-settings file. After that, doing a "rpm
-bb ~/rpmbuild/SPECS/dosemu.spec" created the file that I wanted,
dosemu-1.4.0-1.x86_64.rpm. I installed it and it appears to work as expected.
PERFORMANCE
This 64-bit DOSEMU compile runs substantially slower than the 32-bit compile
that I used previously on this computer. I have several rather large
PowerBASIC/DOS programs that are, in fact, the main reason why I use DOSEMU.
Up until a couple of days ago, I had Fedora 7/i386 on this computer. I just
happen to still have the numbers when compiling one of those programs with
PowerBASIC/DOS under DOSEMU:
With F7/i386: 1686600 lines per minute -- total time to compile the program:
0.2 seconds
With F8/x86_64: 230400 lines per minute -- total time to compile the program:
1.6 seconds.
The F8/x86_64 DOSEMU is running approximately 13 times slower.
I understand that DOSEMU has to do more work to run on a x86_64 architecture.
However, I'm wondering if there is something that I missed or something that I
should do (compiler options?) that would give it a bit more oomph.
--
MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com
-
To unsubscribe from this list: send the line "unsubscribe linux-msdos" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
