James Molloy wrote:
Hi,
I'm compiling for the mips64el-elf target and would like to use gcc's
atomic builtin functions as provided by this patch:
http://gcc.gnu.org/ml/gcc-patches/2007-09/msg00839.html
I'm using GCC 4.3.0, and a quick grep of the source tree tells me that
the above patch has been applied already (it was not, on GCC 4.2.3).
I'm configuring with the option --with-llsc=yes, and the configure and
compile completes successfully, however when I attempt to compile
sources which use the builtin __sync_bool_compare_and_swap or
__sync_add_and_fetch I still get an unresolved external link error;
> CMakeFiles/kernel.dir/core/process/Semaphore.cc.o: In function
`Atomic<int>::compareAndSwap(int, int)':
>
(.text._ZN6AtomicIiE14compareAndSwapEii[Atomic<int>::compareAndSwap(int,
int)]+0x30): undefined reference to `__sync_bool_compare_and_swap_4'
When I try to compile with the -mllsc option, as suggested by the
patch description, cc1plus quits with an invalid command line option
error.
I'd appreciate it if someone could give me a hint as to how to get gcc
to use its builtins for my MIPS target - it should be noted however
that I am compiling with -mips32; that is I am compiling 32-bit mips
code (which is intended to be run on a 64-bit processor - an r4000
compatible).
Thanks,
James Molloy
Please ignore this. I was using a build script that created a symlink to
GCC - the wrong version. It was still using the old GCC version (4.2.2).
Apologies.
