Need help converting a makefile into a gyp file (raspberry pi camera)

[Gagle]

My knowledge in compiling things in C/C++ is quite limited but I've managed to write a makefile with all the flags needed to compile a C library for the raspberry pi camera. Link to the repository: omxcam

A little spam:

omxcam is a promising C library for controlling the raspberry pi camera. It communicates directly with OpenMAX and as far as I know it's the first library that does this because it's very hard to write OpenMAX code: there are a few examples on the internet and even the core maintainers (the people that write the camera driver) need to help you. I've spent over 3 months to understand how OpenMAX works and write a multithreaded C lib. I still need to do lots of things but now I want to write the bindings to the nodejs code for having a functional example that streams h264 video and jpeg images. Link to the nodejs repository: omxcam

nodejs + raspberrypi + omxcam, the perfect union of the 2 most popular technologies, but I need help. I'm struggling to write the gyp file but I'm not getting the desired result. The makefile is the following: makefile. There first two variables let you configure the makefile:

APP: Name of the binary file
OMXCAM_HOME: Root directory of the library

Then, the most important thing is the last flag of the INCLUDES variable:

-I./$(OMXCAM_SRC_DIR)

It allows you to include the omxcam header without specifying a weird path relative from who-knows:

#include "omxcam.h"

This is the gyp file: gyp file. The omxcam source files are compiled without error but then when I include the omxcam.h file in the nodejs binding it says that the file doesn't exist, so presumably I'm doing something wrong. I appreciate any help.

I can upload the generated files if you need to see them.

Thanks

[Kevin Ingwersen]

Hey!

In a target, you may also specify the key include_dirs. Its a list. So just look at the example here: https://github.com/Deskshell-Core/node-ph7/blob/master/src/binding.gyp

Maybe it helps. :)

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"Yo Dawg, I heard you like C++, so I  added C++ to your build system, so you have to compile before you compile.“ -StackOverflow, Matt Joiner ( http://stackoverflow.com/a/5025525/2423150 )

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[Gagle]

This is actually what I'm doing, but the path of the header files are not resolved correctly.

[Gagle]

ok, fixed... gyp is very weird, I don't know why but I've put the directory includes inside a direct_dependent_settings property and now it compiles.

[Kevin Ingwersen]

Yeah…GYP is weird like that. I am actually working on a replacement for this thing x)

--

"Yo Dawg, I heard you like C++, so I  added C++ to your build system, so you have to compile before you compile.“ -StackOverflow, Matt Joiner ( http://stackoverflow.com/a/5025525/2423150 )

[Gagle]

Well, it compiles but now I get a runtime error:

node: symbol lookup error: /home/pi/node-omxcam/build/Release/addon.node: undefined symbol: _Z24OMXCAM_initVideoSettingsP21OMXCAM_VIDEO_SETTINGS

Funny.

[Gagle]

mmm, ok, it seems that it's something related with the name mangling and extern "C".