Gentoo Archives: gentoo-user

From: R0b0t1 <r030t1@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Questions on Raspberry Pi cross compiling
Date: Thu, 20 Jul 2017 05:59:52
Message-Id: CAAD4mYgA1yHD70+c_EJbU__W++TktMNwuBMk=xReRf54YkUxRw@mail.gmail.com
In Reply to: [gentoo-user] Questions on Raspberry Pi cross compiling by Danny YUE
1 On Thu, Jul 20, 2017 at 12:42 AM, Danny YUE <sheepduke@×××××.com> wrote:
2 > Hi guys,
3 >
4 > I am setting up cross compiling environment for my newly bought
5 > Raspberry Pi 3, under the guide of:
6 > https://wiki.gentoo.org/wiki/Raspberry_Pi
7 > https://wiki.gentoo.org/wiki/Raspberry_Pi/Quick_Install_Guide
8 >
9 > My original idea was to use crossdev to cross compile packages on my PC
10 > and install binaries on RPI.
11 > However I found it really nasty because it kept giving me the error
12 > message about "libintl: no such file or directory" during compilation of
13 > packages such as attr, python etc.
14 >
15 > And if some (even very few) packages fail to build on the PC, it is
16 > hardly possible to keep PC and RPI 'consistent'.
17 > (Yes, I did setup the 'make.profile' symlink to the right place.)
18 >
19 > So my question is:
20 > 1) If some packages are *doomed* to fail, how do you keep the
21 > emerge world environment consistency between PC and RPI?
22 > Or is my understanding of this method incorrect?
23 >
24
25 Match compilation and USE flags.
26
27 > 2) If it is not really a good idea to use crossdev, which one do you
28 > recommend between distcc and chroot method?
29 > (I googled but did not really get one answer about compilation speed.)
30 >
31
32 You should be able to mix crossdev compiled packages freely with
33 device compiled ones. Incompatible packages will be ignored and it
34 will try to recompile a package with matching flags, so pay attention.
35 If you need to compile something on device then I suspect you want to
36 use distcc if at all possible.
37
38 Please submit a bug report for packages that don't compile. You
39 probably want to do it on the Gentoo tracker. These tend to be
40 problems with autoconf, but developers seem to be reluctant to
41 learning about the autoconf tests they make use of or providing fixes
42 for them even though they're likely the people most capable creating
43 fixes. The autoconf developers do not seem to have any idea about how
44 to deal with cross compilation failures in a centralized way.
45
46 > Thanks in advance for any potential help. ;-)
47 >
48 > P.S. Does anyone have any idea about the 'libintl' error? I googled a
49 > lot but it seems that it should be part of glibc...
50
51 Can you post the full output of the error you're receiving?

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Re: [gentoo-user] Questions on Raspberry Pi cross compiling Danny YUE <sheepduke@×××××.com>