[PATCH] D70764: build: reduce CMake handling for zlib

[Saleem Abdulrasool via Phabricator via cfe-commits]

compnerd created this revision.
compnerd added reviewers: beanz, smeenai.
Herald added subscribers: lldb-commits, Sanitizers, hiraditya, mgorny.
Herald added projects: clang, Sanitizers, LLDB, LLVM.

Rather than handling zlib handling manually, use `find_package` from CMake to find zlib properly.  Use this to normalize the `LLVM_ENABLE_ZLIB`, `HAVE_ZLIB`, `HAVE_ZLIB_H`.  Furthermore, require zlib if `LLVM_ENABLE_ZLIB` is set to `YES`, which requires the distributor to explicitly select whether zlib is enabled or not.  This simplifies the CMake handling and usage in the rest of the tooling.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D70764

Files:
  clang/test/CMakeLists.txt
  clang/test/lit.site.cfg.py.in
  compiler-rt/test/lit.common.configured.in
  lld/test/CMakeLists.txt
  lld/test/lit.site.cfg.py.in
  lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
  lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
  llvm/cmake/config-ix.cmake
  llvm/include/llvm/Config/config.h.cmake
  llvm/lib/Support/CMakeLists.txt
  llvm/lib/Support/CRC.cpp
  llvm/lib/Support/Compression.cpp
  llvm/test/CMakeLists.txt
  llvm/test/lit.site.cfg.py.in
  llvm/unittests/Support/CompressionTest.cpp

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