[cfe-dev] clang+llvm uses gcc?

Eli Friedman eli.friedman at gmail.com
Tue Jan 26 07:30:33 CST 2010


On Tue, Jan 26, 2010 at 3:58 AM, herz <alexander.herz at mytum.de> wrote:
> hi,
>
> apparently I musunderstood something here. I'm trying to compile and run
> the t.c from the getting started page
> (http://clang.llvm.org/get_started.html).
> Invoking "clang t.c" gives me an error that it failed because it has no
> permissions to access gcc. Why is it calling gcc? I though tzhe clang
> front end parses c into llvm IL and then the llvm generates a x86
> binary, so where and especially why is gcc needed?

On platforms where clang doesn't know how to properly call the
assembler and linker directly, the clang uses the gcc driver to
perform these tasks.  if you pass "-S" to clang, it won't touch gcc.

-Eli


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