Properly working cargo features

[TobiasBales]

I somehow misread the cargo features documentation in what exactly exposes to #cfg
This now properly compiles and finishes #66

[jeremyletang]

This seems to break the travis build, the makefile is not valid.

It make me think that it may be a good time to switch travis build to cargo, and keep autoconf + make only to build gtk_glue. What do you think about this @TobiasRaeder ?

[TobiasBales]

Sounds like a good idea.
Currently trying to fix the make build for now though.
Will let you know if I give up ;)

[TobiasBales]

Okay, maybe it is the right move.
According to cargo build -v it passes --cfg feature="GTK_3_12" to rustc but for me that fails in the rust cfgspec when calling in a shell.

I'd be in favor of just using make to generate the glue library only, cargo for the rest

[TobiasBales]

Any updates on the travis build update?

[jeremyletang]

This seems always broken: see here.
Do you think you can fix it ? can we pass the feature by parameter to cargo build ?
You should know that Travis only support gtk 3.6.

[TobiasBales]

I thought you wanted to just use make for glue code compilation.
But I will see if I can just fix the makefile

[jeremyletang]

hey ! #99 seems to build, so i'll merge it. I open an issue about porting travis build to cargo.