"zhouxu(NUDT)" <zhouxuzhu1985@xxxxxxxxx> writes: > I have successfully build GCC4.5 on my Fedora12. And I want to > test the automatic parallelization feature of GCC4.5. I write a system > program and compile it with flags: > -O2 -fno-loop-strip-mine -floop-interchange -fgraphite-identity > -ftree-parallelize-loops=4 -floop-parallelize-all > -fdump-tree-graphite-all > But I got the following error: > block.c:1:0: sorry, unimplemented: Graphite loop optimizations cannot be used > I am confused. It seems the error is related to the flag > "-floop-parallelize-all". Does anyone knows what the problem is? Using the Graphite transformations require configuring and building gcc with the optional cloog and PPL libraries. See the installation instructions for more information. Ian
