tree 20ba9320a9eabddad26bce605ceebe0deb25ef88
parent bccefc9c3259ed3dce92e9a00bc5db29319e8d94
author Jason Molenda <jmolenda@apple.com> 1545171708 +0000
committer Jason Molenda <jmolenda@apple.com> 1545171708 +0000

Un-conditionalize use of libcompression.  debugserver only builds
on Darwin systems and libcompression has been in the OS for over
three years. 

Remove use of / linking to zlib.  We'll always have libcompression
available now.

Create a scratch buffer via compression_encode_scratch_buffer_size()
and use it in calls to compression_encode_buffer() to avoid 
compression_encode_buffer having to malloc & free a scratch buffer
on each call.  

Tested by forcing compression to be enabled on macos native (normally
only enabled on iOS et al devices), running the testsuite.

<rdar://problem/41601084>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@349553 91177308-0d34-0410-b5e6-96231b3b80d8