Re: i386 -> powerpc cross-compiler

[Jonathan Larmour <jlarmour@cygnus.co.uk>]

James Piechota wrote:
> 
> For a little while now I've been trying to build a i386-redhat-linux to
> powerpc-motorola-eabi gcc cross-compiler.
[snip]
> Unfortunately, for the purposes of future uses I must use gcc-2.8.1 and
> gdb-4.17 (ironically gdb-4.18 built smoothly).

Why is this ironic? It's probably for the good reason that someone has made
GDB more portable.

> The error message I got while trying to make gdb is this:
> 
> in file included from /usr/include/sys/ioctl.h:30
>                 from /usr/include/sys/mount.h:27
>                 from ../../../gdb-4.17/sim/ppc/emul_unix.c:113:
> /usr/include/ioctl-types.h:37: redefinition of 'struct termios'
> 
> Part of the problem is that newlib did not have the file 'mount.h' so the
> compiler went looking in /usr/include.

No, emul_unix.c is meant to be compiled on your host system, not your
cross-compiler. If you look you'll see it's compiled by gcc, not
powerpc-motorola-eabi-gcc.

The solution is this trivial patch, which is what's in GDB 4.18:

Index: emul_unix.c
===================================================================
RCS file: /cvs/cvsfiles/devo/sim/ppc/emul_unix.c,v
retrieving revision 1.10
retrieving revision 1.11
diff -u -5 -p -r1.10 -r1.11
--- emul_unix.c 1998/03/13 01:30:42     1.10
+++ emul_unix.c 1998/06/26 18:22:48     1.11
@@ -107,14 +107,10 @@
 #ifdef HAVE_GETRUSAGE
 #include <sys/resource.h>
 int getrusage();
 #endif
 
-#if HAVE_SYS_MOUNT_H
-#include <sys/mount.h>
-#endif
-
 #if HAVE_DIRENT_H
 # include <dirent.h>
 # define NAMLEN(dirent) strlen((dirent)->d_name)
 #else
 # define dirent direct


Jifl
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