Error when including library in vala project

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1

I am using Gnome builder for a .vala project. In this project I want to use libserialport of which I have the library and -devel packages installed. At first I was having issues with the vala part of the library, which turned out to be the .vapi file missing which was easily solved. However now I’m having trouble with the C library part of it and am getting the following error if I include it as: meson.get_compiler('c').find_library('libserialport')

C shared or static library ‘libserialport’ not found

It does show up in pkgconfig pkg-config --list-package-names | grep libserialport and I can find the library in /usr/lib64

Contents of /urs/lib64/pkgconfig/libserialport.pc:

prefix=/usr
exec_prefix=/usr
libdir=/usr/lib64
includedir=/usr/include

Name: libserialport
Description: Cross-platform serial port access library.
URL: http://sigrok.org/wiki/Libserialport
Requires.private:
Version: 0.1.1
Libs: -L${libdir} -lserialport
Libs.private:
Cflags: -I${includedir}
2

You need find_library('serialport')

See Vala

3

but if it has a .pc file, you could and probably should just do dependency('libserialport') anyway?

4

I’d indeed expect dependecy('libserialport') to work, but it doesn’t. I think it might be because it is in /usr/lib64 not /usr/lib(running Fedora). However I don’t know how to make it use lib64.

Btw also tried find_library('serialport') but that doesn’t work either. Or any variation of it with dependecy.

5

Since you are using Builder, it is possible that you are building a flatpak. If this is the case, it won’t find libraries installed in your host system. You need to add (instructions for building) the libraries you need to the flatpak manifest.

6

That is probably it (I am using flatpak build). Is there a simple way to add it to the manifest (from e.g. pkconfig)? Did a quick search, but haven’t found it. If you don’t, no problem, I’ll at least have something to do this weekend. :stuck_out_tongue:

7

You don’t add it from the pkg-config. You add instructions on how to build it from sources (so you don’t need to install it on your system). You need to do something like what is described here.

8

Alright. So here is my genius solution (for anyone reading this at a later time): “don’t bother with flatpak”.
I’m not going to build all dependencies locally if I have them right here already. Seems kind of a flaw of flatpak tbh. If you have any closed source dependency you can’t make a flatpak.

9

Sure, your choice.

No, that is incorrect. Otherwise there wouldn’t be hundreds of proprietary apps on flathub.

10

In the mean time I have it building in flatpak since I only have one dependency.

No, that is incorrect. Otherwise there wouldn’t be hundreds of proprietary apps on flathub.

But how would you then include closed source dependency? I can’t find any documentation how to link a local, prebuild, library file.

11

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