Steve Kemp's Blog Writings relating to Debian & Free Software

So that distribution I'm not-building?

Sun, 6 Apr 2014 12:32:38 GMT

The other week I was toying with using GNU stow to build an NFS-share, which would allow remote machines to boot from it.

It worked. It worked well. (Standard stuff, PXE booting with an NFS-root.)

Then I started wondering about distributions, since in one sense what I'd built was a minimal distribution.

On that basis yesterday I started hacking something more minimal:

  • I compiled a monolithic GNU/Linux kernel.
  • I created a minimal initrd image, using busybox.
  • I built a static version of the tcc compiler.
  • I got the thing booting, via KVM.

Unfortunately here is where I ran out of patience. Using tcc and the static C library I can compile code. But I can't link it.

$ cat > t.c <>EOF
int main ( int argc, char *argv[] )
{
        printf("OK\n" );
        return 1;
}
EOF
$ /opt/tcc/bin/tcc t.c
tcc: error: file 'crt1.o' not found
tcc: error: file 'crti.o' not found
..

Attempting to fix this up resulted in nothing much better:

$ /opt/tcc/bin/tcc t.c -I/opt/musl/include -L/opt/musl/lib/

And because I don't have a full system I cannot compile t.c to t.o and use ld to link (because I have no ld.)

I had a brief flirt with the portable c-compiler, pcc, but didn't get any further with that.

I suspect the real solution here is to install gcc onto my host system, with something like --prefix=/opt/gcc, and then rsync that into my (suddenly huge) intramfs image. Then I have all the toys.

| 2 comments.

 

Comments On This Entry

[gravitar] rjc

Submitted at 19:51:02 on 6 April 2014

You obviously by saying `I compiled a monolithic GNU/Linux kernel` you meant Linux kernel - political over-correctness ;^)

[gravitar] Thomas Preud'homme

Submitted at 14:39:54 on 8 April 2014

Please come to us at tinycc-devel@nongnu.org. We'll be happy to solve your bug with tcc.

 

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