Re: [ptxdist] Request for comments: CROSS_LIB_DIR handling etc.

[Michael Olbrich <m.olbrich@pengutronix.de>]

Hi,

On Wed, Oct 13, 2021 at 09:29:24AM +0200, Christian Melki wrote:
> I've been correcting various hardcoded paths in ptxdist packages and whatnot
> lately. This started with ptxdist not coping well with toolchains that
> adhere to the ABI path for various architectures.
> 
> Yesterday, I dug into the problem that on x86_64 (/lib64), all .pc.in -> .pc
> file transformations looked broken with hardcoded paths. At first I thought
> it had something to do with autoconf or pkg-config but after a while I found
> this.
> 
> scripts/lib/ptxd_make_world_install_mangle_pc.awk
> 
> Which after a while made me realize that there is still a lot of code in
> ptxdist core stuff that assumes that lib-paths are only /lib and nothing
> else.
> 
> So. I'm presenting a two options here.
> 
> 1. Fix all ptxdist core stuff, because really, ptxdist should be more
> flexible than hardcoded paths. Esp. for libs.
> 
> 2. Split ptxd_get_lib_dir, because, ld.so path should not be assumed to be
> the same as main library install path. So ptxd_get_ld_lib_dir which does
> what it does today and install ld there and ptxd_get_lib_dir = /lib and be
> done with all the userspace library transformations.

So, put everything in lib/ and only the ld.so in lib64/, right?

> So. Number one probably requires a lot of more work and a lot of headache.

And we'll probably break it more often.

> Number two should be rather straightforward, atleast in theory.

There will be some packages that will use lib64/ anyways, because they
query the toolchain directly. We have a platform-foo/sysroot-host/lib64
symlink because of that.

> Any thoughts?

I actually really like option 2. It sounds like a lot less work and
problems in the long run.

If necessary, we could also make lib64/ a symlink to lib/ (in
ptxd_make_world_install_prepare() and in the final rootfs). That way, it
wouldn't matter which one the packages are using.
But I'd like to avoid that if possible.

Michael

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