On 2010-11-04, at 4:19 PM, Brady McCary wrote:

gambit-list,

I had composed a long-winded email about some trouble I was having linking against ATLAS

http://math-atlas.sourceforge.net/

but I figured it out. Because I am using external C++ dependencies I compiled gambit using C++. It turns out that I want to use

(c-declare #<<c-declare-end

extern "C" { #include <cblas.h> };

c-declare-end )

and not

(c-declare "#include <cblas.h>")

This is obvious in retrospect. However I wasted about 90 minutes on this. Hopefully someone will search for

gambit, linker, link, linking, atlas, blas, lapack, undefined reference

and find this message here.

Brady

Thanks for keeping a record of your errors for others to learn from. Let me add that your code could be improved by having instead:

(c-declare #<<c-declare-end

___BEGIN_C_LINKAGE #include <cblas.h> ___END_C_LINKAGE

c-declare-end )

The ___BEGIN_C_LINKAGE and ___END_C_LINKAGE macros, defined in gambit.h, will expand to extern "C" { ... } when compiling with a C++ compiler, and to nothing when compiling with a C compiler. So your code will be more portable because it will work regardless of the kind of C compiler you are using.

Marc