Back port part of r566296 | gerald | 2021-02-22 from lang/gcc9-devel:
[B]ack port of part of r565301 | gerald | 2021-02-15 from lang/gcc11-devel: Explicitly build --without-zstd such that archivers/zstd isn't pulled in inadvertedly when present in the build system even though it is not an explicit dependency. 
Back port part of r566885 | gerald | 2021-03-01 from lang/gcc9-devel:
Remove the GRAPHITE option. Graphite still is a largely experimental feature, so better left to newer versions of GCC such as GCC 10 which is now our default.
PR: 253286