Re: [RFC PATCH 3/3] tools/nolibc: add a new "install_all_archs" target

[Willy Tarreau <w@1wt.eu>]

On Fri, Jun 27, 2025 at 09:27:10AM +0200, Thomas Weißschuh wrote:
> On 2025-06-27 07:49:18+0200, Willy Tarreau wrote:
> > On Fri, Jun 27, 2025 at 07:46:18AM +0200, Willy Tarreau wrote:
> > > On Fri, Jun 27, 2025 at 07:11:45AM +0200, Thomas Weißschuh wrote:
> > > > On 2025-06-26 23:15:07+0200, Arnd Bergmann wrote:
> > > (...)
> > > > With the symlink, a given generic UAPI tree can be specialized to one
> > > > specific architecture. But here we want to create a full sysroot that works
> > > > for all architectures *at the same time*. So a symlink would not be enough.
> > > 
> > > Exactly!
> > > 
> > > > > If it's indeed possible to concatenate the path name (I couldn't
> > > > > figure that out either), that could also be done in place of the
> > > > > symlink but simpler than the #if/#elif/#elif/... block, like
> > > > > 
> > > > > #include <arch.h> // defines ARCH_PREFIX
> > > > > #include CONCAT(ARCH_PREFIX, ioctl.h)
> > > > 
> > > > If we can't get it to work like this I would still prefer to have a
> > > > template header file which gets specialized with sed instead of the
> > > > Makefile loop.
> > > 
> > > The thing is that it's not a single header, it's for each header file
> > > present in asm/. And we can't request that anyone adding anything into
> > > asm would also have to maintain one extra template for each of them.
> > > 
> > > Or I'm simply not getting how you would envision it maybe.
> > 
> > Or do you mean a template that contains all #ifdef/#include for all
> > archs, that serves as the basis to rebuild all headers, and that we
> > still have the loop on all files in the makefile ? I.e. you simply
> > want to drop the arch loop ? If that's it, yes I'm fine with this as
> > well and can give it a try.
> 
> This is exactly what I meant.

OK then, I'll have a look to this and Arnd's idea, hopefully we'll
find something better than the current proposal.

willy