Merge topic 'fixes-andes-olcf'

b9248327 Depend on superbuild pkg-config even on UNIX

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Ben Boeckel <ben.boeckel@kitware.com>
Merge-request: !964

projects/matplotlib.cmake

@@ -6,7 +6,7 @@ if (WIN32)
 endif ()
 
 set(matplotlib_depends)
-if (APPLE)
+if (APPLE OR UNIX)
   list(APPEND matplotlib_depends
     pkgconf)