build: add support for building UUID

Add support for building the bundled UUID library.  This ensures that
the UUID behaviours are the same across the different environments and
is needed for supporting Windows which uses some of the UUID APIs which
are not available.

Author: compnerd

CMakeLists.txt

@@ -57,6 +57,17 @@ ExternalProject_Add(CoreFoundation
                       ${CMAKE_COMMAND} -E env --unset=DESTDIR ${CMAKE_COMMAND} --build . --target install)
 ExternalProject_Get_Property(CoreFoundation install_dir)
 
+add_library(uuid
+            STATIC
+              uuid/uuid.h
+              uuid/uuid.c)
+# Add an include directory for the CoreFoundation framework headers to satisfy
+# the dependency on TargetConditionals.h
+target_compile_options(uuid
+                       PUBLIC
+                         -I${install_dir}/System/Library/Frameworks/CoreFoundation.framework/Headers)
+add_dependencies(uuid CoreFoundation)
+
 set(swift_optimization_flags)
 if(CMAKE_BUILD_TYPE MATCHES Release)
   set(swift_optimization_flags -O)