Add basic CMake support for master branch

[porkiedev]

Adds basic support for CMake. It's far from perfect but it does work.

This was heavily derived from the work done in #314 but with less complicated CPU feature detection and support for the latest master branch.

Unfortunately, this only builds the library. I am not a C programmer, nor do I have any experience with autotools or autotest.
Because of this, I couldn't implement and verify autotest functionality. I also couldn't implement benchmarks because I am building under MingW64 on Windows, and the sys/resource.h is not readily available.

That said, this still builds the library fine and seems to be working. Hopefully, this motivates someone more qualified than me with CMake and C to build upon this work.

[pfeatherstone]

Do you need a GetSources.cmake file? Can't you inline all that stuff in the main CMakeLists.txt script?
You probs also need to install a liquidConfig.cmake file and liquid.pc file.

[porkiedev]

Hopefully, those commits address your liquidConfig.cmake concerns. I'm not very familiar with CMake so it took me a little bit to figure out.

As for getSources.cmake, no, it's not neccesary. I added it to reduce bloat in the main CMakeLists.txt file. The sources are already very long and the autotests and benchmarks aren't even included yet. That said, there's no reason why it couldn't be inline with CMakeLists.txt.

And lastly, liquid.pc. I'm not entirely sure what a .pc file is. If you have more info, I can look at implementing it.

[pfeatherstone]

The .pc file is for pkg-config

[porkiedev]

pkg-config support has been added. I discovered some problems when building on Ubuntu 22.04, so I resolved those and then tested the pkg-config implementation. pkg-config seems to be finding liquid just fine.

Hope that helps! :)

[DSDR999]

@porkiedev have clone your branch. I run the following commands in msys2(mingW64)
cd liquid-dsp
mkdir build
cmake ..
Its results is
-- VAR IS C:/APP/msys64/home/28181/liquid-dsp/CMakeLists.txt
-- Configuring done (25.1s)
-- Generating done (0.1s)
-- Build files have been written to: C:/APP/msys64/home/admin/liquid-dsp/build
but i found there is no makefile in the build directory

make: *** No targets specified and no makefile found. Stop.

[porkiedev]

I don't currently have access to a PC, and this branch was from several months ago, so I can't investigate for about a week. Please ping me again if I don't reply again after a week, and I'll see what I can do. :)

[DSDR999]

I don't currently have access to a PC, and this branch was from several months ago, so I can't investigate for about a week. Please ping me again if I don't reply again after a week, and I'll see what I can do. :)

Thank your quickly reply. if there is no response, i will contact you.

[porkiedev]

I don't currently have access to a PC, and this branch was from several months ago, so I can't investigate for about a week. Please ping me again if I don't reply again after a week, and I'll see what I can do. :)

Thank your quickly reply. if there is no response, i will contact you.

Sorry for the slow response. I can't remember for sure, but, if I recall correctly, I had issues with generating a makefile, which is why running make doesn't work.
Try running cmake --build . from inside of the build directory and see if that works.

[xerpi]

Looking forward to CMake support, which would also make it easier to use Ninja! 🙏

[DSDR999]

I don't currently have access to a PC, and this branch was from several months ago, so I can't investigate for about a week. Please ping me again if I don't reply again after a week, and I'll see what I can do. :)

Thank your quickly reply. if there is no response, i will contact you.

Sorry for the slow response. I can't remember for sure, but, if I recall correctly, I had issues with generating a makefile, which is why running make doesn't work. Try running cmake --build . from inside of the build directory and see if that works.
I run cmake . at the project root.
Then cmake --build ./ in the build dir.
I have sucessfully build the library.
Thank you.
Maybe, it will be more powerful tool, if it can make the test and example directorie.

[Zosoworld]

I would also be really interested in finally adding CMake support to liquiddsp. It seems like this branch can be merged with the master one. I have been using it for a while with no problems. Big thanks to @porkiedev for the work.

[xerpi]

The more I have to deal with autotools, the more I think CMake support is really needed.
It's quite painful to integrate liquid-dsp with a project using CMake and git submodules right now...