Fail to find a function in yaml.h library (C) - c

Question

I try to read a yml file in C (Code::Blocks IDE) but I receive an undefined reference error for yaml_parser_initialize:
#include <stdio.h>
#include <stdlib.h>
#include <yaml.h>
int main(){
FILE *fh = fopen("configuration.yaml", "r");
yaml_parser_t parser;
/* Initialize parser */
if(!yaml_parser_initialize(&parser))
fputs("Failed to initialize parser!\n", stderr);
fclose(fh);
return 0;}
The function exists in yaml.h. I linked the yaml library as follows:
Project->Build Options->Linker Settings: added src\.libs\libyaml.a
Project->Build Options->Search Directories->Compiler: added the include library: yaml-0.2.5\include.
Project->Build Options->Search Directories->Linker: added the include library: yaml-0.2.5\include.
OS: Win10
Thanks in advance.

Answer 1

In short, I will try to answer that and update my answer per request.
If you building on Linux OS, no matter if your host OS is Windows(you may run Linux as a virtual machine), you usually link with .a or .so library files.
If you build envinronment is Windows, no matter the host OS, then you usually link with .lib or .dll libraries.
That being said, the above mentioned OS'es have a different convention about how to supply a path to file.
On Linux the path go like this: /path/to/libs/libyaml.a.
On Windows the path go like this C:\Program Files\libs\yaml.lib.
Any app that runs on the OS follow the OS path convention. In your case Code::Blocks request you to supply a path in the convention the guest OS is.
The below text, is two methods of building your code with yaml library ob Ubuntu.
Update
I do not use Code::Blocks as of now. I've installed the IDE to check what your options are.
You talk about Ubuntu, C and yaml. That will be:
1) New Project->Console Application->C.
2) <Whichever project names you wish>
3) <Whatever compiler configuration you like>
That was to create a bunch of files that CB calls project. Now I dont know what sort of yaml library you use. But you talk about Ubuntu and C so...
1) apt search libyaml-><guess what yaml are>->apt install libyaml-dev
2) pkg-config --list-all | grep yaml gets me the output of yaml-0.1. That is the name I want to supply as argument to pkg-config.
BTW you seem to get a different version of yaml library. But still, all we need is to know proper strings to supply as compiler and linker arguments.
3) pkg-config --libs gets me -lyaml
4) pkg-config --cflags gets me empty line. So the include path is well-known for the build envinronment
This way, we know the linker arguments(-lyaml) and the compiler arguments(<empty string>). Now I try to insert them somewhere where CB could find them.
1) Menu options: Project->Build options...
2) Compiler settings-> no change
3) Linker settings->link libraries->yaml
The libraries in CB should go without -l prefix, so it should be as above. Hit build and all went OK.
Update for git version
It seems that your yaml version is newer than my distro version. If you need recent version, lets go and install that from git.
1) apt remove libyaml-dev. So that there will be no clashes with the library versions.
I did choose the Canonical repository for libyaml as my distro is Ubuntu. You need to mkdir for the sources and cd to that directory.
2) git clone https://github.com/yaml/libyaml
3) cd libyaml
4) Follow the instructions to build and install.
5) pkg-config --list-all | grep yaml gets me yaml-0.1
6) pkg-config --cflags yaml-0.1 produces -I/usr/local/include
7) pkg-config --libs yaml-0.1 gets this -L/usr/local/lib -lyaml
Ok we got the compiler & linker flags for the library. The link library option stays the same. You need to add -L/usr/local/lib to Other linker options. I did not find where I could add the compiler flags, so I'had added new flag. In CB that will be Compiler flags-><right mouse click>->New flag. Name the flag somehow and insert the -I/usr/local/include string to the Compiler flags input row. Hit OK button. Hit the checkbox in front of your newly created flag. Build & Run.