Re: multiple cpu's with a single install

[Leonard Norrgard <leonard dot norrgard at pp dot inet dot fi>]

William Baker wrote:

> I would like to support a new CPU.  It's been a very long time since I 
> dug deep into the gcc emitter code.  (Think Amiga.)

Likewise - those were the days. :-)

> Has anyone ever considered the possibility of supporting multiple 
> CPU's and architectures with a single install?  I already have a small 
> collection of cross compilers, and I really wish I could just say "gcc 
> --cpu=arm hello.c", or "gcc --cpu=i686 hello.c".  Pipe dream?

This is what "gcc -b", or <machine>-gcc does. Quoted from the gcc 
manual, "3.16 Specifying Target Machine and Compiler Version":

The usual way to run GCC is to run the executable called `gcc', or
`<machine>-gcc' when cross-compiling, or `<machine>-gcc-<version>' to
run a version other than the one that was installed last.  Sometimes
this is inconvenient, so GCC provides options that will switch to
another cross-compiler or version.

`-b MACHINE'
    The argument MACHINE specifies the target machine for compilation.

    The value to use for MACHINE is the same as was specified as the
    machine type when configuring GCC as a cross-compiler.  For
    example, if a cross-compiler was configured with `configure
    i386v', meaning to compile for an 80386 running System V, then you
    would specify `-b i386v' to run that cross compiler.

> Please forgive the slightly off-topic post.  I hang out on this list 
> and really appreciate those I have come to recognize through their posts.
>
> bbaker


-- Leonard