# lto currently breaks glibc
# -flto=auto -fdevirtualize-at-ltrans -fipa-pta 
-fno-lto -fno-fast-math
# use bfd linker
-fuse-ld=bfd -fuse-linker-plugin
# graphite
-fgraphite-identity -floop-nest-optimize
-fno-semantic-interposition
