fix: Import with GFLAGS_USE_TARGET_NAMESPACE=ON

CMakeLists.txt

@@ -562,7 +562,7 @@ if (INSTALL_HEADERS)
   )
   install (
     EXPORT ${EXPORT_NAME}
-    FILE ${EXPORT_NAME}-nonamespace.cmake
+    FILE ${PACKAGE_NAME}-nonamespace-targets.cmake
     DESTINATION ${CONFIG_INSTALL_DIR}
   )
   if (UNIX)
@@ -585,7 +585,7 @@ export (
 )
 export (
   TARGETS ${TARGETS}
-  FILE "${PROJECT_BINARY_DIR}/${EXPORT_NAME}-nonamespace.cmake"
+  FILE "${PROJECT_BINARY_DIR}/${PACKAGE_NAME}-nonamespace-targets.cmake"
 )
 if (REGISTER_BUILD_DIR)
   export (PACKAGE ${PACKAGE_NAME})

cmake/config.cmake.in

@@ -14,7 +14,7 @@ if (@PACKAGE_PREFIX@_USE_TARGET_NAMESPACE)
   include ("${CMAKE_CURRENT_LIST_DIR}/@EXPORT_NAME@.cmake")
   set (@PACKAGE_PREFIX@_TARGET_NAMESPACE @PACKAGE_NAME@)
 else ()
-  include ("${CMAKE_CURRENT_LIST_DIR}/@EXPORT_NAME@-nonamespace.cmake")
+  include ("${CMAKE_CURRENT_LIST_DIR}/@PACKAGE_NAME@-nonamespace-targets.cmake")
   set (@PACKAGE_PREFIX@_TARGET_NAMESPACE)
 endif ()
 if (@PACKAGE_PREFIX@_TARGET_NAMESPACE)