Hi,

although the question was asked two years ago for C (http://www.nr.com/forum/showthread.php?s=&threadid=184&highlight=makefile)
, maybe someone has now an answer:

I try to compile a simple C++ application which uses two functions of the numerical recipes (bessj0 and powell) with this command:

g++ appl.c -L. -lNR_C++ -o appl

, but the functions are not known ("undefined reference to NR: powell...")

What's the reason for that?



Thanks.

Make sure appl.c has #include "nr.h". Also, somewhere you need to link in the recipes you're using, powell and bessj0. So the g++ line needs powell.cpp or powell.o or a library you've created of the recipes, eg -lnumrecipes.

But that's exactly what I'm doing!

See: "-lNR_C++" in my first post.


But this is not working...

Try to compile with
g++ appl.c powell.cpp bessj0.cpp

If this works, somehow your library hasn't been made properly.

OK,

It's working now.
Had some other issues but after linking all necessary files (6), it seems to work.

Thanks.