qt-base: fix rpath for dependents (spack#47424)

ensure that CMAKE_INSTALL_RPATH_USE_LINK_PATH=ON works in qt packages.

Author: wdconinc

var/spack/repos/builtin/packages/qt-base/package.py

@@ -70,9 +70,15 @@ def cmake_args(self):
             if re_qt.match(dep.name):
                 qt_prefix_path.append(self.spec[dep.name].prefix)
 
-        # Now append all qt-* dependency prefixex into a prefix path
+        # Now append all qt-* dependency prefixes into a prefix path
         args.append(self.define("QT_ADDITIONAL_PACKAGES_PREFIX_PATH", ":".join(qt_prefix_path)))
 
+        # Make our CMAKE_INSTALL_RPATH redundant:
+        # for prefix of current package ($ORIGIN/../lib type of rpaths),
+        args.append(self.define("QT_DISABLE_RPATH", True))
+        # for prefixes of dependencies
+        args.append(self.define("QT_NO_DISABLE_CMAKE_INSTALL_RPATH_USE_LINK_PATH", True))
+
         return args
 
     @run_after("install")