I am writing an Alpha Macro subroutine 'myfunc' which needs...

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Question by Sam
Submitted on 6/14/2004
Related FAQ: OpenVMS Frequently Asked Questions (FAQ), Part 1/5
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I am writing an Alpha Macro subroutine 'myfunc' which needs to call an external C function 'extfunc' and also needs to be called by another C function. I am coding the linkage psect as follows: .LINKAGE_PAIR extfunc .PROCEDURE_DESCRIPTOR myfunc, START1 .LOCAL_LINKAGE_PAIR myfunc While my linking goes throgh fine with the macro object and my C object library, at runtime I find that the pointer to the function 'extfunc' is not available in my macro function. Shouldn't it be available as an offset from the default linkage register R27 ? I looked at mem locations around the value pointed to by R27 in my debugger, and find that it shows a value only to 'myfunc', but not to the 'extfunc'. How do I get both to work, ie, have 'myfunc' declared correctly so that other C routines can link with it, and also have 'extfunc' address available in my macro program so that I can call it from macro. Appreciate any help/suggestions.

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