4.3. Compiling a Module

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Compiling a module is easy and straightforward. Just do it as you would do for any dynamic load library. On Linux you have to compile the source code to object file, saying

cc -c -o trial.o trial.c
ld -d -warn-section-align -sort-comon -shared -o trial.so trial.o
assuming that the name of the file to compile is `trial.c'. On other Unix operating systems you have to issue similar commands.

On Windows NT you can use Visual C++ and create an empty project using the work space wizard to create a new dll file. You have to add your source code to the project, select release version and compile the program.

Note that Windows NT dll files do not automatically export each non-static function of a program. They have to be declared in a DEF file or the functions should be denoted with a special type casting keyword. If you use the predefined macros available including the file `basext.h' your functions will be exported without creating a def file.

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