Re: [Qemu-devel] compiling on PPC doesn't work

[malc <av1474@comtv.ru>]

On Sun, 25 May 2008, C.W. Betts wrote:

> Due to the fact that there is now a PowerPC tcg host, I tried to make the 
> i386 and sparc guests.  I am building it on an Intel Mac, but I doubt that's 
> the problem (although it took me awhile to figure out how to make PPC apps on 
> i386 comps without using a --build configure argument).  However, I got the 
> following error when trying to compile the apic.c file on i386:

Few notes:

  a. Some new optimizations commited shortly before/after ppc tcg uncovered
     a bug. The bug was fixed but the patch is not yet been commited to SVN.

  b. MacOS X is not supported.
     (I think it has a slightly different ABI plus changes to dyngen and
      elsewhere are needed to work with Mach O relocations. The latter
      is essential for working with those targets that still use dyngen)

> gcc -I. -I.. -I/Users/username/makestuff/qemu-svn/target-i386 
> -I/Users/username/makestuff/qemu-svn -MMD -MP -DNEED_CPU_H -D__powerpc__ 
> -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE 
> -I/Users/username/makestuff/qemu-svn/tcg 
> -I/Users/username/makestuff/qemu-svn/tcg/ppc 
> -I/Users/username/makestuff/qemu-svn/fpu -DHAS_AUDIO -DHAS_AUDIO_CHOICE 
> -I/Users/username/makestuff/qemu-svn/slirp -Wall -O2 -g -fno-strict-aliasing 
> -mdynamic-no-pic -m32 -arch ppc -c -o apic.o 
> /Users/username/makestuff/qemu-svn/hw/apic.c
> /var/folders/zN/zNzLfd+VH20MiY73gvxNNk+++TI/-Tmp-//cc4FQRDT.s:151:Invalid 
> mnemonic 'bsr'
> /var/folders/zN/zNzLfd+VH20MiY73gvxNNk+++TI/-Tmp-//cc4FQRDT.s:1458:Invalid 
> mnemonic 'bsf'
> make[1]: *** [apic.o] Error 1
> make: *** [subdir-i386-softmmu] Error 2

Excerpt from apic.c

#if defined(HOST_I386)
     __asm__ __volatile__ ("bsr %1, %0\n" : "+r" (ret) : "rm" (value));
     return ret;
#else

Apparently HOST_I386 is defined somewhere hence this optimization.

>
> The sparc platform compiled and linked without a problem, as well as the rest 
> of the files.

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