Running External Programs under a Debugger
MathLink allows you to run external programs under whatever debugger is provided in your software environment.
MathLink-compatible programs are typically set up to take arguments, usually on the command line, which specify what MathLink connections they should use.
| In debugger: | run -linkcreate -linkprotocol TCPIP |
| In Mathematica: | Install[LinkConnect["port",LinkProtocol->"TCPIP"]] |
Running an external program under a debugger.
Note that in order to get a version of an external program that can be run under a debugger, you need to compile the program so that the output is suitable for use with your debugger. Unix compilers commonly use 
as a command-line argument for producing a debuggable program. See your compiler documentation for specific information on the steps you should take.
Unix debugger
Set a breakpoint in the C function
.
break f
Breakpoint set: f: line 1
Start the external program.
run -linkcreate -linkprotocol TCPIP
The program responds with what port it is listening on.
Link created on: 2981@frog.wolfram.com,2982@frog.wolfram.com
Mathematica session
This connects to the program running under the debugger.
| Out[1]= |  |
This calls a function that executes code in the external program.
Unix debugger
The external program stops at the breakpoint.
This tells the debugger to continue.
Mathematica session
Now
returns.
| Out[3]= |  |
