[PATCH] D39888: [lsan] Only use VM_MEMORY_OS_ALLOC_ONCE on Darwin versions that support it

[Rainer Orth via Phabricator via llvm-commits]

ro added a comment.

Just for the record, I've now posted a gcc patch for this issue.  Perhaps the two-line change to lsan/lsan_common.h to allow predefining
CAN_SANITIZE_LEAKS from the build environment can still go upstream?


https://reviews.llvm.org/D39888