How to Compile and Link an External Material Model

To export functions from the DLL when using Microsoft Visual Studio to compile your library, you must declare the functions as __declspec(dllexport). Therefore, to write a source code that works across platforms, use the following #define pattern:

#ifdef _MSC_VER

#define EXPORT __declspec(dllexport)

#else

#define EXPORT

#endif

 

EXPORT <return_type> eval(<arguments>) { }

Compiling and Linking

To compile the function into a library, place it in a file (here called ext.c as an example) and proceed as follows depending on the platform:

See http://www.comsol.com/system-requirements for information about supported compiler versions.

•	64-bit Windows with Microsoft Visual Studio 2010:

-	Start Microsoft Visual Studio>Visual Studio Tools>Visual Studio x64 Win64 Command Prompt (2010) from the Windows Start menu.

-	cd to the directory that contains ext.c.

-	cl /MT /c ext.c

-	link /OUT:ext.dll /DLL ext.obj

•	64-bit Linux with Intel Compiler:

-	cd to the directory that contains ext.c.

-	icc -fPIC -c ext.c

-	icc -shared -fPIC -Wl,-z -Wl,defs -o ext.so ext.o -ldl

•	64-bit Mac OS X with Intel Compiler:

-	cd to the directory that contains ext.c.

-	icc -fPIC -c ext.c

-	icc -dynamiclib -fPIC -o ext.dylib ext.o

For other compilers, refer to the compiler’s documentation for instructions on how to compile and create a shared library.