[LLVMdev] Error building llvm-gcc

Mike Stump mrs at apple.com
Wed Apr 16 12:47:28 PDT 2008

On Apr 16, 2008, at 11:47 AM, John Criswell wrote:
> I get the following error building llvm-gcc using gmake (i.e., not  
> building the bootstrap target).  Any ideas on what I am doing wrong?

One common problem is if you are doing incremental builds, you may  
want to try building restrap first and see if that clears the  
problem.  If not...

If anything, you're trying to build a broken compiler...

You can ignore it by disabling the bootstrap (--disable-bootstrap), or  
by fixing the compiler to be other than broken, or by acquiring a non- 
broken compiler.

If you want to try fixing it or hunting it down yourself, you can  
compile rtl.o with the stage 2 and the stage 3 compilers with -save- 
temps and then compare the rtl.s files from each.  The difference  
between them is the problem, generally indicates a codegen bug in the  
compiler, though, sometimes just indicates some random non-determinism  
someone put into the compiler.

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