[GCCBootstrap]: Change ARM shard to support armv6l and armv7l #1707
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* Upgrade `GCCBootstrap` to Julia 1.6+ syntax * Change GCC bootstrapping process to use armv6l as the default microarchitecture. This builds an armv6l-compatible version of the initial compiler support units, and allows us to build armv6 or armv7 targeting binaries. It may cause a slight slowdown on armv7l, (due to some of those compiler support libraries using only older, slower, armv6 instructions). If it turns out to be too much of a problem, we may need to build independent copies of the arm shards.
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Upgrade
GCCBootstrapto Julia 1.6+ syntaxChange GCC bootstrapping process to use armv6l as the default
microarchitecture. This builds an armv6l-compatible version of the
initial compiler support units, and allows us to build armv6 or armv7
targeting binaries. It may cause a slight slowdown on armv7l, (due to
some of those compiler support libraries using only older, slower, armv6
instructions). If it turns out to be too much of a problem, we may need
to build independent copies of the arm shards.