CMake imported targets should be namespaced

fmt/CMakeLists.txt

@@ -77,14 +77,15 @@ if (FMT_INSTALL)
     ${PROJECT_SOURCE_DIR}/support/cmake/fmt-config.cmake.in
     ${project_config}
     INSTALL_DESTINATION ${FMT_CMAKE_DIR})
-  export(TARGETS ${INSTALL_TARGETS}
+  export(TARGETS ${INSTALL_TARGETS} NAMESPACE fmt::
          FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake)
 
   # Install version, config and target files.
   install(
     FILES ${project_config} ${version_config}
     DESTINATION ${FMT_CMAKE_DIR})
-  install(EXPORT ${targets_export_name} DESTINATION ${FMT_CMAKE_DIR})
+  install(EXPORT ${targets_export_name} DESTINATION ${FMT_CMAKE_DIR}
+    NAMESPACE fmt::)
 
   # Install the library and headers.
   install(TARGETS ${INSTALL_TARGETS} EXPORT ${targets_export_name}

test/find-package-test/CMakeLists.txt

@@ -5,7 +5,7 @@ project(fmt-test)
 find_package(FMT REQUIRED)
 
 add_executable(library-test main.cc)
-target_link_libraries(library-test fmt)
+target_link_libraries(library-test fmt::fmt)
 
 if (TARGET fmt-header-only)
   add_executable(header-only-test main.cc)