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Re: [gpsd-users] Trying to cross-compile for arm

From: Markus Juenemann
Subject: Re: [gpsd-users] Trying to cross-compile for arm
Date: Thu, 28 Jul 2016 11:40:25 +1000

Hi Lukas,

I have successfully cross-compiled gpsd-3.10 for XScale/ARM but, of
course, every system is different and cross-compiling can be a very
painful experience.

There's some information the gpsd's build.txt file:

"Depending on how your distribution packages ncurses you may also
require libtinfo5, a separate terminfo library."

You said that you cross-compiled ncurses. Did the instructions mention

I suspect that the way you symlink libtinfo to libncurses is wrong.
libtinfo should be a separate library.

As you are certainly aware the error message 'cannot find -ltinfo' means
that the linker cannot find the library. Do you set CFLAGS and LDFLAGS
when running scons? 

Depending on your needs you could put 'ncurses = False' into
.scons-option-cache but that way many of the useful command line tools
won't be build. 

Happy to provide more help

> Hello,
> I'm trying to cross-compile gpsd for my Altera SoC-FPGA board. I setup
> the linaro compiler and the linaro sysroot, also I cross-compiled ncurses
> and added it to the sysroot and I created a
> .scons-option-cache containing this:
> libgpsmm = False
> python = False
> prefix = '/home/lukas/sysroot-linux-gnueabi/usr/'
> target = 'arm-linux-gnueabihf'
> sysroot = '/home/lukas/sysroot-linux-gnueabi'
> Running scons I get the following error:
> [...]
> arm-linux-gnueabihf-gcc -o cgps
> --sysroot=/home/lukas/sysroot-linux-gnueabi -pthread cgps.o -L.
> -lgps_static -lm -lrt -lncurses -ltinfo
> /home/lukas/gcc-linaro-5.1-2015.08-x86_64_arm-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/5.1.1/../../../../arm-linux-gnueabihf/bin/ld:
> cannot find -ltinfo
> [...]
> Somehow ld doesn't find libtinfo I think. I created symbolic links in
> /lib of my sysroot like this:
> ->
> -> libncurses5.9
> Did any of you cross-compile gpsd before or does anyone have an idea what
> I am doing wrong?
> Thank you for your help.
> Best regards,
> Lukas

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