On Mac create .dmg packages

This avoids the problem of macOS quarantining files that have been
extracted from a .tar.gz.

Author: mplatings

CHANGELOG.md

@@ -8,10 +8,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Fixed
 - Building from sources created by git archive (#242).
+- macOS no longer quarantines files from the macOS package.
 
 ### Changed
 - Updated multilib to use LLVM multilib.yaml 1.0 (#250).
 - `*.cfg` files for library variant selection removed in favor of multilib
+- The macOS package is now a .dmg instead of .tar.gz.
 
 ### Removed
 

CMakeLists.txt

@@ -1244,6 +1244,9 @@ endif()
 if(LLVM_TOOLCHAIN_CROSS_BUILD_MINGW OR WIN32)
     set(cpack_generator ZIP)
     set(package_filename_extension ".zip")
+elseif(CMAKE_OSX_ARCHITECTURES)
+    set(cpack_generator DragNDrop)
+    set(package_filename_extension ".dmg")
 else()
     set(cpack_generator TGZ)
     set(package_filename_extension ".tar.gz")

README.md

@@ -73,9 +73,9 @@ and extract the archive into an arbitrary directory.
 On Ubuntu 20.04 and later `libtinfo5` is required: `apt install libtinfo5`.
 (This requirement will be removed in LLVM Embedded Toolchain for Arm 17.)
 
-On macOS the toolchain binaries are quarantined by com.apple.quarantine. To
-run the executables change directory to bin and run the following command to
-remove the com.apple.quarantine:
+Prior to LLVM Embedded Toolchain for Arm 17, on macOS the toolchain binaries
+are quarantined by com.apple.quarantine. To run the executables change directory
+to bin and run the following command to remove the com.apple.quarantine:
 
 ```
 find . -type f -perm +0111 | xargs xattr -d com.apple.quarantine