help with an error message using clang ?

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#1

Hi,

I am new to LLVM and clang and I would like to seek some professional help. :slight_smile:

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?

Thanks a lot and have a nice weekend!

Best,
Christine

#2

Hi,

I am new to LLVM and clang and I would like to seek some professional help. :slight_smile:

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:

The files in /usr/include are extremely unlikely to be the right ones. You need a Sparc standard library, not an x86 one like will be installed in /usr.

#3

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

#4

Hi Eli,

Thanks for the reply. Indeed there is solaris on the Sparc machine. I was told that it is quite difficult to install LLVM there so I am doing what I am doing. Is there a way for me to get headers from the target Sparc machine without installing LLVM there?

Best,
Christine

#5

You should be able to just rsync /usr/include/ from the Sparc machine.

-Eli