bluestore: fixed compilation error when enable spdk with gcc 4.8.5 #16945
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The change is induced by my commit #12672.
At that time, "add_compile_options" is needed to fix compile error.
But since we've updated spdk to 17.07 and related spdk/dpdk.git, add_compile_options is no longer needed.
If we leave it in CMakelists.txt, "add_compile_options" can not be identified by low gcc version, and the developer has to upgrade gcc to 6.X.X.
By this reason, I revert this change.
Signed-off-by: Pan Liu wanjun.lp@alibaba-inc.com
Signed-off-by: Ziye Yang optimistyzy@gmail.com