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14 External Calls

INTERCAL-72 C-INTERCAL CLC-INTERCAL J-INTERCAL
no version 0.28+ no no

C-INTERCAL has a feature allowing INTERCAL and non-INTERCAL code to be mixed. This is achieved by causing the non-INTERCAL programs to participate in the INTERCAL line-numbering model. The same feature allows expansion libraries to be linked into the code.

To create a combined program containing INTERCAL and non-INTERCAL code, use ick as the compiler as normal, but specify both the INTERCAL and non-INTERCAL source files on the command line, and use the -e command-line option. ick will invoke other compilers as necessary, after modifying the source files accordingly. At present, external calls are only supported to and from C and Funge-98.

In each case, it will be the INTERCAL program that is invoked first. (This means that it is impossible to link together more than one INTERCAL program, but you probably don’t want to, because concatenating the programs is likely to have a similar effect.) You can get the INTERCAL program to NEXT to the non-INTERCAL program immediately, or the non-INTERCAL program to COME FROM or NEXT FROM the INTERCAL program immediately, to obtain the effect of running the non-INTERCAL program first.

Note that external calls are incompatible with PIC-INTERCAL and with multithreading; note also that you must use gcc as your compiler, and GNU cpp and ld, for them to work in the current version of C-INTERCAL.


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