Augustin Cavalier 8bc13c5528 BuildSetup: Default HOST_C++ and HOST_LINK to HOST_CC.
Now that HOST_CC is actually passed in, we need to default
everything to it; otherwise, it's up to the Jambase as to
what CC we are actually using.

Found by trying to build Haiku on a system that has no "cc"
executable, but Jam tried to use it anyway (as all three of CC,
C++, and LINK.)
2018-08-15 14:41:40 -04:00
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