[cfe-dev] clang/llvm issue with compiling gcc

[Eli Friedman]

On Tue, Sep 13, 2011 at 12:25 PM, John Smith <lbalbalba at gmail.com> wrote:
> Hi,
>
>
> Im trying to run scan-build on GCC 4.5.3, and im running into the
> following problem: Somewhere during the compilation, the process seems
> to stall/freeze/hang/loop... whatever it's doing, it's not progressing
> anymore.
>
> Im running into this issue using clang version 3.0 trunk 139148. I
> didnt run into this problem when compiling the same version of gcc on
> the same system when using either gcc (4.5.1), or an earlier version
> of clang: v3.0 trunk rev. 131083 (or slightly earlier, dont have the
> exact version). I didnt run into this issue when I ran with the same
> version of scan-build on other c programs (yet ?) on the same system.
> It doesnt seem to be a disk/cpu/ram shortage issue.
>
> According to 'top', 'clang' is eating up most of my cpu, but when
> running strace on the pid, I get no output whatsoever. When running
> strace on the 7 PID's running 'ccc-analyzer', most seem to be in
> either 'wait' or 'waitpid'. Except for the ccc-analyzer that produced
> the last output on my screen, wich seems to be stuck in 'read'. The 2
> PID's of 'make' seem to be in wait and waitpid as well.
>
> I have no idea on how to start with problemshooting here. Any help is welcome.

If you can grab the command-line for the invocation of clang that is
hanging (I don't know exactly what options, if any, you need for
ccc-analyzer to dump that), please file a bug at llvm.org/bugs/ with
that command-line and the preprocessed source of the file in question.

-Eli