Re: ADA/C++ Compatibility problems

stachour@klondike.winternet.com (Paul D. Stachour) writes:


      To understand what multilingual interfaces need, I suggest reading abou the
      Multics run-time and how its descriptors work so that calls from PL/I to
      FORTRAN (or similar cross-language calls) are easy. If you want to know
      how the hard way, I suggest reading the IBM OS/360 manuals that indicate
      the kind of interface routine one needs to build to do cross-language calls
      from one language to another when they don't support the same run-time
      paridigm.


As a more readily accessible exmaple that Multics, try the VMS calling
conventions. DEC's compilers have had inter-language calls from day one. The
necessary "hacks" to get languages requiring initialization to co-operate
properly are less well documented, although a general mechanism
(LIB$INITIALIZE) is provided.


Jan
[I gather there are (were?) performance problems -- the heavyweight CALLS and
CALLG instructions used in the common calling sequence were complicated and
slow. -John]
--

Return to the comp.compilers page.
Search the comp.compilers archives again.