Problem with link of external Library

[navratill]

Hi,

thanks for your help, but this still doesnt work:

I tried it like:
LIBS += -L/Libs -mathlib

is this ok by your idea?

Thank you very much for your help

[qlands]

hummm...

Does the add function is :add(double, double) ? Because if it its parameters are integers or floats your compiler are sending 1 and 2 as double. So try to store 1 and 2 into integer or float variables A and B. And call add(A,B); to see if it works.

Can you paste mathlib.h? I cannot find any copy on the web to check the add() function.

Best.

[mcosta]

The correct syntax is

LIBS += -L/Libs -lmathlib

LIBS += -L/Libs -lmathlib

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not the l (lowercase el) before the library name

I think you need to improve your knowledge about building and linking executables