ppc64 cross compiler hangs in infinite loop while compiling kernel/posix-timers.coptimised

[Chris Friesen]

I'm using a crosstool-generated ppc64 cross compiler for ppc.  Specifically, its 
the 3.4.0 compiler.

Building with "V=1", the full command is:

powerpc64-linux-gnu-gcc -m64 -Wp,-MD,kernel/.posix-timers.o.d -nostdinc 
-iwithprefix include -D__KERNEL__ -Iinclude  -Wall -Wstrict-prototypes 
-Wno-trigraphs -fno-strict-aliasing -fno-common -msoft-float -pipe 
-Wno-uninitialized -mminimal-toc -mtraceback=none -mtune=power4 -funit-at-a-time 
-O2 -Wdeclaration-after-statement    -DKBUILD_BASENAME=posix_timers 
-DKBUILD_MODNAME=posix_timers -c -o kernel/.tmp_posix-timers.o kernel/posix-timers.c

This hangs.  If I remove the "-O2" portion, it compiles fine.  Obviously 
something is confusing it.  Anyone have any ideas?

Chris
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