[make error] Compile Gpredict with an external library

[dskim]

Hi all,

I am working on Gpredict software with the following development environments:

• Linux Ubuntu: 18.04
• Gpredict: 2.2.1
• Glib: 2.56.4
• Gio: 2.56.4
• Gthread: 2.56.4
• Gdk: 3.22.30
• Gtk+: 3.22.30
• GooCanvas: 2.0.4
• Libcurl: 7.58.0

I would love to add a simple feature and I am trying to edit the pass-to-txt.c file (to save a TXT file that contains the results of the coordinate conversion from the given satellite’s future pass and lat/ lon/ alt.)

Regarding the coordinate conversion (for example from LLA (Lat/ Lon/ Alt) to ECEF (Earth-Centered Earth Fixed), I would like to use the GeoStars library. So, I put the GeoStars sources to the Gpredict source directory (~/gpredict-2.2.1/src/) as follows.

And the GeoStars sources (located at ~/gpredict-2.2.1/src/geostarslib/src/lib/) looks like this:

In pass-to-txt.c file, I added some lines as follows:

In the directory (~/gpredict-2.2.1/), after the make command, I faced this error:

• ./configure → Okay
• make → Undefined reference to '…' error
  
  

Could anyone please help me to compile the Gpredict software with the external library?

Sincerely,
Dongsin

[csete]

You have to update the build files (configure.ac and Makefile.am) with either the sources or link to an external library. Putting the files in the source tree is not enough.

[dskim]

Thank you for your reply.

Yes-! Finally, I managed to this problem.
Here is what I did.

• updated the configure.ac at the ~/gpredict-2.2.1/ directory

• created and filled in the Makefile.am(s) in each source folder of the external library.

• And then,
  $ aclocal
  $ autoconf
  $ autoheader
  $ automake
  $./configure
  $ sudo make
  $ sudo make install
  $ cd ~/
  $ gpredict

• Please refer to this diagram.