Debian Lenny

[Kobaz]

I've an old Intel STL2 server that has Lenny on it. I'm trying to build the server on it, but am having a lot of grief.

With both gcc 4.1 and 4.3 I get the following:

../common/crc32.cpp: In static member function static uint32 CRC32::Update(const int8*, uint32, uint32):
../common/crc32.cpp:238: error: PIC register bx clobbered in asm
make[1]: *** [../common/crc32.o] Error 1

I notice someone else had this error, and they fixed it, but they didn't say how.

I've tried to get current source via svn, using:

svn checkout http://projecteqemu.googlecode.com/s...nk/EQEmuServer

but this doesn't get me all the code, i.e. the ../common/* directory isn't there (or the parent Makefile, or heaps of other files).

Where am I stuffing up?

[Kobaz]

BTW, the 1st error was for the 1129 tarball.

[Derision]

To get the code from SVN:

svn checkout http://projecteqemu.googlecode.com/svn/trunk/ projecteqemu-read-only

The solution to your compilation problem is to downgrade to an older version of GCC. I know 4.1.1 works, as that is what I use on Gentoo.

Edit: I see you tried GCC 4.1, so I'm not sure what your problem is.

[Angelox]

This actually is a 'rare' bug that will turn up under certain situations while compiling. I looked it up a while ago and tried to understand it. I have this problem on one of my machines, but it's not a big deal for me since it's not my server machine and i can still compile else where.
If you google 'PIC register bx clobbered in asm', you'll see what I mean.
This is one example of this problem and how they solved it.

Line 112 in crc32.cpp seems to point to an earlier problem of this sort'

#undef i386 //darwin seems to think we are generating PIC, and we clobber ebx

I can downgrade my GCC to version 3.3.6 and this problem will go away, so it must be GCC related too.

I also noticed sometimes I would get one good compile, then it would start with the 'clobbered' BS.

[kjaer_dk]

I was using a debian lenny install as well and the problem with thats is that you can not downgrade perl 5.10 to 5.8.8

http://www.eqemulator.net/forums/sho...583#post159583

[Kobaz]

I'm no expert on asm coding by any means, but in crc32.cpp, why does the code go:

__asm __volatile (
             "xorl   %%ebx, %%ebx\n"
              "movl   %1, %%esi\n"   

(cut many lines)

              "xorl   (%%edi,%%ebx,4), %%eax\n"
      "2:\n"
              :
              : "a" (val), "g" (buf), "g" (bufsize)
              : "bx", "cx", "dx", "si", "di"
      );
        
      return val;

instead of:

__asm __volatile (

             "push  %%ebx"

             "xorl   %%ebx, %%ebx\n"
              "movl   %1, %%esi\n"   

(cut many lines)

              "xorl   (%%edi,%%ebx,4), %%eax\n"

              "pop  %%ebx"

      "2:\n"
              :
              : "a" (val), "g" (buf), "g" (bufsize)
              : "cx", "dx", "si", "di"
      );
        
      return val;

This bug has nothing to do with the Perl version btw.