[gentoo-user] [Slightly OT] Linking to a non-standard library installed using portage

[Mark Knecht]

Hi,
   This is going to be trivial for anyone who actually programs.
Thanks in advance.

   How do I link to a library I installed using portage? If someone
could show me an example make file that would be great. I've no real
experience in C and what I did have was in Windows years ago so I'm
undertaking some study here. I wrote a simple little test program that
calculates a simple moving average using ta-lib:

mark@c2stable ~/CODE/CUDA/Mark $ cat ta-lib-ma.cu
#include <stdlib.h>
#include <ta-lib/ta_libc.h>

#define VECTOR_LEN 100

int main(int argc, char **argv)
{
   int i;
   double MyData[VECTOR_LEN];
   double MySMA[VECTOR_LEN];
   TA_Integer outBeg;
   TA_Integer outNbElement;

   for (i = 0; i < VECTOR_LEN; i++)
   {
      MyData[i] = (i*i)/(10*i);
   }

   TA_SMA(0, VECTOR_LEN-1, MyData, 10, &outBeg, &outNbElement, MySMA);

   for ( i=0; i< outNbElement; i++ ) printf("Bar %d = %f\n", outBeg+1,
MySMA[i]);
   return 0;
}
mark@c2stable ~/CODE/CUDA/Mark $


The program compiles fine using NVidia CUDA compiler nvcc creating an
object file ta-lib-ma.o:

mark@c2stable ~/CODE/CUDA/Mark $ nvcc -c ta-lib-ma.cu
mark@c2stable ~/CODE/CUDA/Mark $ ls -al ta-lib-ma.*
-rw-r--r-- 1 mark users   477 Feb  3 10:08 ta-lib-ma.cu
-rw-r--r-- 1 mark users 17184 Feb  3 10:12 ta-lib-ma.o
mark@c2stable ~/CODE/CUDA/Mark $

However I cannot figure out how to link it to the ta-lib files
installed by portage:

mark@c2stable ~/CODE/CUDA/Mark $ equery files ta-lib
[ Searching for packages matching ta-lib... ]
* Contents of sci-libs/ta-lib-0.4.0:
/usr
/usr/bin
/usr/bin/ta-lib-config
/usr/include
/usr/include/ta-lib
/usr/include/ta-lib/ta_abstract.h
/usr/include/ta-lib/ta_common.h
/usr/include/ta-lib/ta_defs.h
/usr/include/ta-lib/ta_func.h
/usr/include/ta-lib/ta_libc.h
/usr/lib64
/usr/lib64/libta_lib.a
/usr/lib64/libta_lib.la
/usr/lib64/libta_lib.so -> libta_lib.so.0.0.0
/usr/lib64/libta_lib.so.0 -> libta_lib.so.0.0.0
/usr/lib64/libta_lib.so.0.0.0
mark@c2stable ~/CODE/CUDA/Mark $

What do I link to?

I've tried various things like this but none seem to find the library correctly:

mark@c2stable ~/CODE/CUDA/Mark $ nvcc -L/usr/lib64/libta_lib
ta-lib-ma.cu -o ta-lib-ma
/tmp/tmpxft_00000a8b_00000000-13_ta-lib-ma.o: In function `main':
tmpxft_00000a8b_00000000-1_ta-lib-ma.cudafe1.cpp:(.text+0x9f):
undefined reference to `TA_SMA'
collect2: ld returned 1 exit status
mark@c2stable ~/CODE/CUDA/Mark $

Thanks in advance for any pointers.

Cheers,
Mark