[PATCH] [Support] Fix bug in llvm::sys::argumentsFitWithinSystemLimits() of Unix/Program.inc

[Rafael Auler]

Hi rafael,

This patch fixes a subtle bug in the UNIX implementation of llvm::sys::argumentsFitWithinSystemLimits() regarding the misuse of a static variable. This bug causes our cached number that stores the system command line maximum length to be halved after each call to the function. With a sufficient number of calls to this function, it will eventually report any given command line string to be over system limits.

http://reviews.llvm.org/D5053

Files:
  lib/Support/Unix/Program.inc
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