Re: Working on stuff / statement from tschwinge (was: Gnumach clean: Need advice, re Header files)

[Thomas Bushnell BSG]

> As for the technical issue, Roland is mostly but not entirely right
> about what gnumach/include is for.
> 
> It has both the interface files, and pseudo-clones of C library headers,
> which don't get installed because the C library has better versions.  In
> that category are <sys/types.h>, <sys/time.h>, <sys/reboot.h>,
> <sys/ioctl.h>, <mach/mig_support.h>, <mach/mach_traps.h>,
> <mach/error.h>, and <alloca.h>, by my count.

Perhaps this seems a little opaque, so I'll describe the point:

gnumach/include is, essentially, a special /usr/include for use by the
kernel itself when compiling.  It only should get things which belong
in /usr/include.  The reason for <alloca.h> and <sys/types.h> is because
those are files found in /usr/include, even if on an actual installed
system the versions in /usr/include are provided by a different package.

thomas

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