[LLVMdev] help with an error message using clang ?

[Eli Friedman]

On Fri, Sep 16, 2011 at 4:40 PM, Christine Cheng <clcheng at stanford.edu> wrote:
> Hi,
>
> I am new to LLVM and clang and I would like to seek some professional help.
> :)
>
> I have been trying to compile some C code on a linux x86 computer for a
> Sparc machine.
>
> I used:
>
>  clang -ccc-host-triple sparc-unknown-linux -ccc-clang-archs sparc -pthreads
> -lm  -emit-llvm test.c -c -o -test.bc
>
> The following error messages are produced:
>
> /usr/include/pthread.h:665:6: error: 'regparm' is not valid on this platform
>      __cleanup_fct_attribute;
>      ^~~~~~~~~~~~~~~~~~~~~~~
> In file included from TEST.C:46:
> In file included from /usr/include/stdlib.h:320:
> In file included from /usr/include/sys/types.h:271:
> /usr/include/bits/pthreadtypes.h:222:50: note: instantiated from:
> # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1)))
>                                                  ^            ~
> In file included from TEST.C:65:
> /usr/include/pthread.h:677:3: error: 'regparm' is not valid on this platform
>   __cleanup_fct_attribute;
>   ^~~~~~~~~~~~~~~~~~~~~~~
> In file included from TEST.C:46:
> In file included from /usr/include/stdlib.h:320:
> In file included from /usr/include/sys/types.h:271:
> /usr/include/bits/pthreadtypes.h:222:50: note: instantiated from:
> # define __cleanup_fct_attribute __attribute__ ((__regparm__ (1)))
>                                                  ^            ~
> In file included from TEST.C:65:
> /usr/include/pthread.h:718:6: error: 'regparm' is not valid on this platform
>      __cleanup_fct_attribute __attribute__ ((__noreturn__))
>      ^~~~~~~~~~~~~~~~~~~~~~~
>
> What causes the errors and how can I fix it?

You're using headers from your x86 machine to compile code for Sparc
(and possibly a different OS?); that doesn't work in general.  You'll
need to somehow use headers from your target Sparc machine to make
things work properly; you can probably just copy them, and use
-nostdinc plus some -I flags to make clang use them.

-Eli