Consider supporting snmalloc in Ubuntu 16.04 (GCC 5.4.0) about snmalloc HOT 3 CLOSED

@anakrish for older ubuntu release, there is a repo to get up-to-date toolchains: https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/test

Add this PPA should not polute the global names, for example gcc version 10 will end up with an executable called gcc-10.

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Supporting a four year old compiler is not something we are resourced to do. As 18.04 LTS is out surely Open Enclave should be pushing for people to use that. Also all the security features around spectre mitigations, etc. are completely missing from GCC 5.4.0. There are clang packages for 16.04, so the snmalloc component could be built with clang, and linked in.

The core difficulty is not the if constexpr but the inline static fields. Prior to C++17 on GCC this required hideous template hacks to get the desired behaviour.

Is this actually a customer requirement for OE? We are happy to support an engineer in back-porting C++14, if someone else funds it.

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16.04 is no longer required for OE. Closing this.

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