Build: Avoiding linking against system yaml-cpp and pystring on macOS

OpenColorIO is now a dynamic library, and these are included in it. The
legacy code for the static library case was causing the Homebrew libraries
to be found and linked to.

Pull Request: https://projects.blender.org/blender/blender/pulls/139087

build_files/cmake/Modules/FindOpenColorIO.cmake

@@ -24,14 +24,6 @@ else()
   set(OPENCOLORIO_ROOT_DIR "")
 endif()
 
-set(_opencolorio_FIND_COMPONENTS
-  OpenColorIO
-  yaml-cpp
-  expat
-  pystring
-  minizip
-)
-
 set(_opencolorio_SEARCH_DIRS
   ${OPENCOLORIO_ROOT_DIR}
   /opt/lib/ocio
@@ -47,21 +39,16 @@ find_path(OPENCOLORIO_INCLUDE_DIR
 )
 
 set(_opencolorio_LIBRARIES)
-foreach(COMPONENT ${_opencolorio_FIND_COMPONENTS})
-  string(TOUPPER ${COMPONENT} UPPERCOMPONENT)
 
-  find_library(OPENCOLORIO_${UPPERCOMPONENT}_LIBRARY
-    NAMES
-      ${COMPONENT}
-    HINTS
-      ${_opencolorio_SEARCH_DIRS}
-    PATH_SUFFIXES
-      lib64 lib lib64/static lib/static
-  )
-  if(OPENCOLORIO_${UPPERCOMPONENT}_LIBRARY)
-    list(APPEND _opencolorio_LIBRARIES "${OPENCOLORIO_${UPPERCOMPONENT}_LIBRARY}")
-  endif()
-endforeach()
+find_library(OPENCOLORIO_OPENCOLORIO_LIBRARY
+  NAMES
+    OpenColorIO
+  HINTS
+    ${_opencolorio_SEARCH_DIRS}
+  PATH_SUFFIXES
+    lib64 lib lib64/static lib/static
+)
+list(APPEND _opencolorio_LIBRARIES "${OPENCOLORIO_OPENCOLORIO_LIBRARY}")
 
 if(EXISTS "${OPENCOLORIO_INCLUDE_DIR}/OpenColorIO/OpenColorABI.h")
   # Search twice, because this symbol changed between OCIO 1.x and 2.x
@@ -90,16 +77,11 @@ endif()
 mark_as_advanced(
   OPENCOLORIO_INCLUDE_DIR
   OPENCOLORIO_LIBRARY
+  OPENCOLORIO_OPENCOLORIO_LIBRARY
   OPENCOLORIO_VERSION
 )
 
-foreach(COMPONENT ${_opencolorio_FIND_COMPONENTS})
-  string(TOUPPER ${COMPONENT} UPPERCOMPONENT)
-  mark_as_advanced(OPENCOLORIO_${UPPERCOMPONENT}_LIBRARY)
-endforeach()
-
 unset(COMPONENT)
 unset(UPPERCOMPONENT)
-unset(_opencolorio_FIND_COMPONENTS)
 unset(_opencolorio_LIBRARIES)
 unset(_opencolorio_SEARCH_DIRS)