Re: sed-4.3 build comments

[Nelson H. F. Beebe]

I've now completed builds of sed-4.3.p2 with

        CC=clang LDFLAGS=--rtlib=compiler-rt

I have 68 builds where that did the trick, and another 12 where the
failure rate was low enough to allow sed to be installed (though I did
not do those installs).

However, I also have 23 builds where the above recipe did not succeed,
either because the compiler did not recognize the option, or it could
not find the library that it refers to, and that library is indeed
missing from the vendor packaging system.

What a mess!  I'm inclined now to leave my build-all configuration
files for clang unchanged, and simply declared that despite all of the
effort that has gone into clang, it still is not a mature compiler,
sigh....

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