[PATCH] Enable optimizations in CFLAGS for gcc

[doughera]

Currently, CFLAGS.in disables optimizations for core_ops_cg.c and core_ops_switch.c, but not for core_ops_cgp.c. Disabling optimization is not necessary for gcc, but other compilers might need it for those two and for core_ops_cgp.c as well.

This patch makes a small step towards regularlizing CFLAGS.in. If using gcc, optimization is allowed on all three. If not using gcc, optimization is disabled on all three files. This seems to be the safest general starting assumption. If other compilers are able to compile those files with optimization, then the #UNLESS statements could be changed to accommodate those as well.

Of course all this can be terribly dependent on the platform, compiler version, available resources, and particular optimization switches chosen. There is, unfortunately, no obvious easy way to generalize this. However, I think it's a good step forward.

[Infinoid]

Thanks, applied as r38265.