[Qemu-devel] Qemu compilation on OS X with gcc 4.0 success

[Daniel Egger]

Hija,

just wanted to mention to those of you trying to compile Qemu
on Darwin with the latest gcc snapshots that you need to supply
the -fno-tree-ch flag for the compilation of op.c at
certain optimization levels for dyngen to work[1]. Performance
of i386-softemu qemu is quite descent, and the resulting code
is smaller than with the native gcc 3.3 but the ppc emu doesn't
compile.

[1] Otherwise there'll be no branch to link register (blr)
    instruction at the end of some of the virtualized
    instructions which dyngen relies on to find the borders.

Servus,
      Daniel

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