Make_export_header scans C source files (*.c) for prototypes and variables to be exported, and creates a C header file (*.h) declaring them. This header file can then be included by other C files that want to use the exported routines or variables.
In the C source, you have to mark declarations of functions and variables to be exported with the pseudo-keyword "export". Because such a keyword does not exist, you have to define an empty macro before you can use it in the source. For example:
#define export /* empty */
/* a variable to be exported */
export char * hugo = "some text";
/* a function to be exported */
export int sepp(int resi, char * susi)
{
...
}
If this is stored in a source file "sepp.c", you can call
make_export_header export_sepp.h sepp.c
Essentially, "export_sepp.h" will contain:
extern char * hugo;
int sepp(int resi, char * susi);
Additionally, there is the usual #ifdef EXPORT_SEPP_H ... so that you can include "export_sepp.h" multiple times without causing problems. Finally, there is a little comment telling you not to modify this file because it is generated automatically.
Probably you want a single header file for all exported symbols in a project. For that, just specify the names of all the sources, for instance:
make_export_header export_sepp.h sepp.c hugo.c resi.c susi.c ...