> 
> On Sep 9, 2015, at 12:17, tim Rowledge <tim at rowledge.org> wrote:
> 
> sudo install -m 0755 libmadgwickIMU..s0.1 /usr/local/lib/libmadgwickIMU.so.1
> sudo ln -sf /usr/local/lib/libmadgwickIMU.so.1 /usr/local/lib/libmadwickIMU.so
													^
Is there a reason for the madwick instead of madgwick?

Ken


> On Sep 9, 2015, at 12:17, tim Rowledge <tim at rowledge.org> wrote:
> 
> I’m trying - and so far failing - to do what should surely be a very simple thing. This isn’t a new situation…
> especially on unix.
> 
> I have a single C file with just two functions. I have a matching H file. I want to make them into a dynamic library that I can call via FFI. This really shouldn’t be rocket science stuff!
> 
> So far I can
> a) compile the C file (well duh)
> b) link it as a shared library
> c) install it in /usr/local/lib (next to another library that I can use from FFI already, so I know the path gets looked at)
> d) set the permissions to match the working library
> e) use from a simple C program to prove it works
> 
> However, all I get from squeak is an error that the external module is not found. I’ll take a look with a debug vm but I’d  be very happy to hear that I’m forgetting some trivial flag or incantation that can short-circuit the ‘fun’ of using gdb.
> 
> Here is the code and makefile -
> https://copy.com/DGDbpJM4wnHQrDUG
> 
> What I’ve been doing to build & try is
> make clean
> make 
> sudo install -m 0755 libmadgwickIMU..s0.1 /usr/local/lib/libmadgwickIMU.so.1
> sudo ln -sf /usr/local/lib/libmadgwickIMU.so.1 /usr/local/lib/libmadwickIMU.so
> sudo ldconfig
> gcc -Wall -o testing testing.c -lmadwickIMU
> ./testing
> 
> ‘testing’ seem to do the right thing. Going into squeak (cog/spur/pi) and trying a method like -
> invSqrt: floatval
> #<cdecl: float ‘invSqrt’ (float) module: ‘madgwickIMU’>
> ^self externalCallFailed
> - just gives me the not found module error.
> 
> I’ve restarted squeak after building the lib, I’ve opened a new terminal after building the lib (just in case there’s some stupid path-exporting nonsense I don’t understand etc) and I’ve made sure to smile only on the left side. What on earth am I forgetting?
> 
> tim
> --
> tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
> Useful Latin Phrases:- Braccae illae virides cum subucula rosea et tunica Caledonia-quam elenganter concinnatur! = Those green pants go so well with that pink shirt and the plaid jacket!
> 
> 
>