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Date: Fri, 9 Apr 2021 11:42:31 +0200
From: Mark Wielaard <mark@klomp.org>
To: Tom de Vries <tdevries@suse.de>
Cc: dwz@sourceware.org, jakub@redhat.com, Michael Matz <matz@suse.de>
Subject: Re: [PATCH] Add -p native and -e native
Message-ID: <20210409094231.GD30119@wildebeest.org>
References: <20210409092439.GA17210@delia>
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On Fri, Apr 09, 2021 at 11:24:41AM +0200, Tom de Vries wrote:
> Add option parameter native to options -p and -e.
> 
> We determine native as the result of:
> - -p: sizeof (void *)
> - -e: __BYTE_ORDER__
> when compiling using CC without CFLAGS, such that if we build dwz with -m32 on
> x86_64 like so:
> ...
> $ make CFLAGS="-m32 -O2 -g" LDFLAGS=-m32
> ...
> and we have:
> ...
> $ file ./dwz
> dwz: ELF 32-bit LSB executable, Intel 80386 <SNIP>
> ...
> we still have:
> ...
> $ ./dwz -?
>   ...
>   -p, --multifile-pointer-size <SIZE|auto|native>
>                               Set pointer size of multifile, in number of bytes.
>                               Native pointer size is 8.
>                               Default value: auto.
> ...
> 
> Any comments?

Except for this narrow multilib case, doesn't this actually make it
impossible to do a cross-arch build? I don't think this should be a
compile time option, unless it can derived from the target
architecture that the dwz binary is build for.

Cheers,

Mark