Rafael Espindola 2037c03682 Use posix_fallocate instead of ftruncate.
This makes sure that space is actually available. With this change
running lld on a full file system causes it to exit with

failed to open foo: No space left on device

instead of crashing with a sigbus.

llvm-svn: 276017
2016-07-19 20:19:56 +00:00
..