[Mono-dev] Mono SVN doesn't build on Mac OSX Snow Leopard

[Miguel de Icaza]

Hello,

> The primary reason seems to be that the default version of gcc on Snow
> Leopard, 4.2.1,  no longer defines __i386__. gcc 4.2.1 defines __x86_64__.

In general, and moving forward, we should stop using the GCC
__platform__ macros, and instead use TARGET_XXXX defines.

This is becoming more important as Mono is used more and more as a cross
compiler.    When Mono is used as a cross compiler the __platform__
merely indicates the host system, but does not cope with the target
system, which ends up breaking a lot of things.

For instance, consider Mono running on Intel, generating code for ARM
(the iPhone case) or Mono running on Intel, generating code for PowerPC
(gaming consoles).