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Re: Cross compile gpsd-3.20.1~dev for arm with buildroot

From: Greg Troxel
Subject: Re: Cross compile gpsd-3.20.1~dev for arm with buildroot
Date: Tue, 23 Jun 2020 19:55:05 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (berkeley-unix)

Florian Kiera <> writes:

>>    I am not quite following, but it may be that build code setting
>>    HOST_DIR does not grasp the concept that if it is under DESTDIR, then
>>    that part should be removed to get a DESTDIR relative path.  I think
>>    there may be trouble from mixing DESTDIR-aware build code from code
>>    that is not really aware but is using a path that has DESTDIR in it.
> There could be a check whether DESTDIR and python_libdir contain the
> same path (a huge part of it). At least for cross compiling with
> buildroot it would work.

I think if any directory contains DESTDIR as a prefix that should
probably throw an error.  Not fix it up, just error.

> In fact python and its library is always under
> /lib|/usr/lib|/usr/lib32|/usr/lib64 isnt it? So why does it need to
> check from where it is called instead of some other work arounds?

No, python can be anywhere.  On pkgsrc it is in /usr/pkg/lib.   On
FreeBSD ports I think it is in /usr/local/lib.

> I don't know which environment variables you can get while using
> scons, may there is one that suits better for the purpose of finding
> the python path?

I am not following why you want "environment variables".  When building
cross, the python libdir has to be for the lib path on the target, which
is going to be within the DESTDIR on the build host.   It has no
relation to where python's libdir is on the build host.  So you have to
pass it explicitly to the cross build anyway.

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