Re: Difficulty making a very simple rockspec...

[Peng Zhicheng <pengzhicheng1986@...>]

On 08/30/2014 09:50 AM, Steven Degutis wrote:
> I can't for the life of me figure this out.
>
> Here's the module I'm trying to create a rockspec:
> https://github.com/mjolnir-io/mjolnir-keycodes
>
> It's a really simple module. It's just a Lua file and a C file that
> the Lua file requires. Nothing out of the ordinary. The only strange
> things this C file needs are `CFLAGS += -fobjc-arc -Wall -Wextra` and
> `LDFLAGS += -framework Cocoa -framework Carbon`. Ideally I'd like to
> use the `builtin` back-end according to the [Rockspec
> format](http://luarocks.org/en/Rockspec_format), but I don't think
> that works with this.
>
> Now, all of the above is strictly about trying to fix the current
> [mjolnir-keycodes-0.1-1.rockspec](https://github.com/mjolnir-io/mjolnir-keycodes/blob/master/mjolnir-keycodes-0.1-1.rockspec)
> file. What I have in the repo right now will *technically* build and
> install. But when I try `k = require 'mj.keycodes'`, it fails saying
> `module 'mj.keycodes.internal' not found` (which is referring to [this
> line](https://github.com/mjolnir-io/mjolnir-keycodes/blob/master/keycodes.lua#L17)
> inside `keycodes.lua`). This means it's actually loading the Lua
> module, but it's not registering the file correctly. Thus I'm pretty
> sure it's related to the `.rockspec` file not being written correctly.
>
> Technically the file is missing also:
>
> ~~~
> $ ls -la /usr/local/share/lua/5.1/mj/
> total 8
> drwxr-xr-x  3 sdegutis  admin   102B Aug 29 18:01 .
> drwxr-xr-x  7 sdegutis  admin   238B Aug 29 18:01 ..
> -rw-r--r--  1 sdegutis  admin   1.2K Aug 29 18:01 keycodes.lua
> ~~~
>
> But that's not the only problem. I'm also probably referencing it
> wrongly inside the `.rockspec` file. And on top of that, it probably
> contains the wrong `luaopen_*` name internally.
>
> If anyone here has experience with this, could you shed a bit of light
> on what I'm missing here?
>
> Thanks for your time.
>
> -Steven

what does the output of `luarocks make` command look like? luarocks should have given
the commands it executed during the building process. check it first to see whether
the library is properly built, and how those object files and library file are named.

I don't use macos, but I suppose if the module is `mj.keycodes.internal', the library
file should be named `internal.so` and should be installed onto the path
`/usr/local/share/lua/5.1/mj/keycodes/internal.so', and the entry point function should
be named `luaopen_mj_keycodes_internal'

I checked your rockspec file, but I couldn't figure out the reason why the module was
not properly installed. I can't build your module on my Linux system, but I played with
some toy code [attached] with a rockspec that is almost identical to your rockspec,
and it all goes well on my system:

~~~~
pzc@pzc-laptop ~/w/p/toy> uname -a
Linux pzc-laptop 3.11.10-21-desktop #1 SMP PREEMPT Mon Jul 21 15:28:46 UTC 2014 (9a9565d) i686 i686 i386 GNU/Linux
pzc@pzc-laptop ~/w/p/toy> luarocks make
gcc -O2 -fPIC -I/usr/include -c toy-core-entrypoint.c -o toy-core-entrypoint.o
gcc -shared -o toy/core.so -L/usr/lib toy-core-entrypoint.o
Updating manifest for /home/pzc/.local/lib/luarocks/rocks

toy 0.1-1 is now built and installed in /home/pzc/.local (license: MIT)
pzc@pzc-laptop ~/w/p/toy> lua -l toy < /dev/null
loading module 'toy'...
loading module `toy.core'...
loaded module 'toy.core'
loaded module 'toy'.
Lua 5.2.2  Copyright (C) 1994-2013 Lua.org, PUC-Rio
~~~~



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