NOTE: all 'long' parameters now use a double dash, so --shared, rather
than gcc-style -shared.

wrong on Windows.

building rustllvm.

symbols because of an Object.o in a .a and one outside. A similar
problem happens for the non-shared part of libpthread.

This patch moves the -whole-archive/-no-whole-archive to include just the
llvm libs.

Fix error where make check would not produce compilers first, due to make's infinite-recursion-prevention heuristic.

Um, that'd be, align the word *before* retpc. Addresses point to the low part of a word. Un-XFAIL nbody on Darwin.