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Re: GCC suggestions needed
Niklaus wrote:
> Hi,
>
> I've an online judge system where i take the source code submitted
> by an user and compile it to an executable and then run it against a
> predetermined input to produce an output which is checked against a
> predetermined output. This determines the results as Correct, Wrong or
> Compile error.
>
> The languages are C,C++,java.
>
> Please suggest solutions for the below problems
>
> 1) How to tell gcc to stop after the first error. I use both gcc
> 4.2 and gcc 3.4. I tried -Wfatal-error and -Wfatal-error it says
> unrecognized option.
Trim the output to the first 50 lines. If the output is 50 lines long,
kill the compiler process.
> 2) There are many people who submit code without compiling. If they
> submit C++ (STL or templates ) code which fails to compile due to some
> problem, it produces lots of output and it is slow, some take 3 - 5
> secs. So that is for each submission. In this way if you make 100
> submissions the whole system is slow. How to over come this problem? I
> tried -fsyntax-only but the difference is not that noticable because
> after that -fsynax-only i have to recompile.
>
> 3) Can this submissions be collected for every 5 secs and then
> compiled in parallel to produce parallel output. Invoking gcc for each
> submission is going to be slow ?
>
> 4) Can we do anything about gcj ? Java compilation errors take the
> most time.
Recent gcj fires off an external process to run the Java front-end. It
depends on how your system is configured, but it's possible you're
running an interpreted Java front-end.
Andrew.