Drop more CMake pre-3.1 compatibility.

doc/plugins.dox

@@ -134,12 +134,12 @@ but there is no need to change the above code, as it will work for both dynamic
 and static case.
 
 The static plugin needs to be explicitly registered so the plugin manager is
-aware it's there. If you use CMake 3.1 and newer it's done automatically.
+aware it's there. If you use CMake, it's done automatically. Otherwise, you can
-Otherwise, you can achieve the same if you explicitly @cpp #include @ce the
+achieve the same if you explicitly @cpp #include @ce the static plugin import
-static plugin import file (named `importStaticPlugin.cpp`, residing in plugin's
+file (named `importStaticPlugin.cpp`, residing in plugin's include directory)
-include directory) in a source file that gets compiled into your main
+in a source file that gets compiled into your main application. The static
-application. The static import file contains just a simple call to
+import file contains just a simple call to @ref CORRADE_PLUGIN_IMPORT(), see
-@ref CORRADE_PLUGIN_IMPORT(), see its documentation for further information.
+its documentation for further information.
 
 @snippet plugins.cpp static-import
 

doc/snippets/CMakeLists.txt

@@ -165,13 +165,6 @@ if(WITH_SDL2APPLICATION)
         getting-started-blue
         snippets-MagnumPlatform
         PROPERTIES FOLDER "Magnum/doc/snippets")
-    # Otherwise it's not linked correctly. I have no idea why, but whatever.
-    if(CMAKE_VERSION VERSION_LESS 3.0)
-        find_package(SDL2 REQUIRED)
-        target_link_libraries(getting-started PRIVATE SDL2::SDL2)
-        target_link_libraries(getting-started-blue PRIVATE SDL2::SDL2)
-        target_link_libraries(snippets-MagnumPlatform PRIVATE SDL2::SDL2)
-    endif()
 endif()
 
 if((NOT TARGET_GLES AND WITH_SDL2APPLICATION) OR (TARGET_GLES AND WITH_XEGLAPPLICATION))
@@ -185,11 +178,6 @@ if((NOT TARGET_GLES AND WITH_SDL2APPLICATION) OR (TARGET_GLES AND WITH_XEGLAPPLI
     set_target_properties(
         snippets-MagnumPlatform-portability
         PROPERTIES FOLDER "Magnum/doc/snippets")
-    # Otherwise it's not linked correctly. I have no idea why, but whatever.
-    if(CMAKE_VERSION VERSION_LESS 3.0)
-        find_package(SDL2 REQUIRED)
-        target_link_libraries(snippets-MagnumPlatform-portability PRIVATE SDL2::SDL2)
-    endif()
 endif()
 
 if(WITH_WINDOWLESSEGLAPPLICATION)

modules/FindMagnum.cmake

@@ -889,10 +889,9 @@ foreach(_component ${Magnum_FIND_COMPONENTS})
             mark_as_advanced(_MAGNUM_${_COMPONENT}_INCLUDE_DIR)
         endif()
 
-        # Automatic import of static plugins on CMake >= 3.1. Skip in case the
+        # Automatic import of static plugins. Skip in case the include dir was
-        # include dir was not found -- that'll fail later with a proper
+        # not found -- that'll fail later with a proper message.
-        # message.
+        if(_component MATCHES ${_MAGNUM_PLUGIN_COMPONENTS} AND _MAGNUM_${_COMPONENT}_INCLUDE_DIR)
-        if(_component MATCHES ${_MAGNUM_PLUGIN_COMPONENTS} AND NOT CMAKE_VERSION VERSION_LESS 3.1 AND _MAGNUM_${_COMPONENT}_INCLUDE_DIR)
             # Automatic import of static plugins
             file(READ ${_MAGNUM_${_COMPONENT}_INCLUDE_DIR}/configure.h _magnum${_component}Configure)
             string(FIND "${_magnum${_component}Configure}" "#define MAGNUM_${_COMPONENT}_BUILD_STATIC" _magnum${_component}_BUILD_STATIC)

src/MagnumPlugins/AnyAudioImporter/CMakeLists.txt

@@ -50,9 +50,7 @@ install(FILES AnyImporter.h ${CMAKE_CURRENT_BINARY_DIR}/configure.h
 # Automatic static plugin import
 if(BUILD_PLUGINS_STATIC)
     install(FILES importStaticPlugin.cpp DESTINATION ${MAGNUM_PLUGINS_INCLUDE_INSTALL_DIR}/AnyAudioImporter)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.1)
     target_sources(AnyAudioImporter INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/importStaticPlugin.cpp)
-    endif()
 endif()
 
 if(BUILD_TESTS)

src/MagnumPlugins/AnyImageConverter/CMakeLists.txt

@@ -50,9 +50,7 @@ install(FILES AnyImageConverter.h ${CMAKE_CURRENT_BINARY_DIR}/configure.h
 # Automatic static plugin import
 if(BUILD_PLUGINS_STATIC)
     install(FILES importStaticPlugin.cpp DESTINATION ${MAGNUM_PLUGINS_INCLUDE_INSTALL_DIR}/AnyImageConverter)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.1)
     target_sources(AnyImageConverter INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/importStaticPlugin.cpp)
-    endif()
 endif()
 
 if(BUILD_TESTS)

src/MagnumPlugins/AnyImageImporter/CMakeLists.txt

@@ -50,9 +50,7 @@ install(FILES AnyImageImporter.h ${CMAKE_CURRENT_BINARY_DIR}/configure.h
 # Automatic static plugin import
 if(BUILD_PLUGINS_STATIC)
     install(FILES importStaticPlugin.cpp DESTINATION ${MAGNUM_PLUGINS_INCLUDE_INSTALL_DIR}/AnyImageImporter)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.1)
     target_sources(AnyImageImporter INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/importStaticPlugin.cpp)
-    endif()
 endif()
 
 if(BUILD_TESTS)

src/MagnumPlugins/AnySceneImporter/CMakeLists.txt

@@ -50,9 +50,7 @@ install(FILES AnySceneImporter.h ${CMAKE_CURRENT_BINARY_DIR}/configure.h
 # Automatic static plugin import
 if(BUILD_PLUGINS_STATIC)
     install(FILES importStaticPlugin.cpp DESTINATION ${MAGNUM_PLUGINS_INCLUDE_INSTALL_DIR}/AnySceneImporter)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.1)
     target_sources(AnySceneImporter INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/importStaticPlugin.cpp)
-    endif()
 endif()
 
 if(BUILD_TESTS)

src/MagnumPlugins/MagnumFont/CMakeLists.txt

@@ -53,9 +53,7 @@ install(FILES MagnumFont.h ${CMAKE_CURRENT_BINARY_DIR}/configure.h
 # Automatic static plugin import
 if(BUILD_PLUGINS_STATIC)
     install(FILES importStaticPlugin.cpp DESTINATION ${MAGNUM_PLUGINS_INCLUDE_INSTALL_DIR}/MagnumFont)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.1)
     target_sources(MagnumFont INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/importStaticPlugin.cpp)
-    endif()
 endif()
 
 if(BUILD_GL_TESTS)

src/MagnumPlugins/MagnumFontConverter/CMakeLists.txt

@@ -53,9 +53,7 @@ install(FILES MagnumFontConverter.h ${CMAKE_CURRENT_BINARY_DIR}/configure.h
 # Automatic static plugin import
 if(BUILD_PLUGINS_STATIC)
     install(FILES importStaticPlugin.cpp DESTINATION ${MAGNUM_PLUGINS_INCLUDE_INSTALL_DIR}/MagnumFontConverter)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.1)
     target_sources(MagnumFontConverter INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/importStaticPlugin.cpp)
-    endif()
 endif()
 
 if(BUILD_GL_TESTS)

src/MagnumPlugins/ObjImporter/CMakeLists.txt

@@ -50,9 +50,7 @@ install(FILES ObjImporter.h ${CMAKE_CURRENT_BINARY_DIR}/configure.h
 # Automatic static plugin import
 if(BUILD_PLUGINS_STATIC)
     install(FILES importStaticPlugin.cpp DESTINATION ${MAGNUM_PLUGINS_INCLUDE_INSTALL_DIR}/ObjImporter)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.1)
     target_sources(ObjImporter INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/importStaticPlugin.cpp)
-    endif()
 endif()
 
 if(BUILD_TESTS)

src/MagnumPlugins/TgaImageConverter/CMakeLists.txt

@@ -50,9 +50,7 @@ install(FILES ${CMAKE_CURRENT_BINARY_DIR}/configure.h DESTINATION ${MAGNUM_PLUGI
 # Automatic static plugin import
 if(BUILD_PLUGINS_STATIC)
     install(FILES importStaticPlugin.cpp DESTINATION ${MAGNUM_PLUGINS_INCLUDE_INSTALL_DIR}/TgaImageConverter)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.1)
     target_sources(TgaImageConverter INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/importStaticPlugin.cpp)
-    endif()
 endif()
 
 if(BUILD_TESTS)

src/MagnumPlugins/TgaImporter/CMakeLists.txt

@@ -51,9 +51,7 @@ install(FILES TgaImporter.h ${CMAKE_CURRENT_BINARY_DIR}/configure.h
 # Automatic static plugin import
 if(BUILD_PLUGINS_STATIC)
     install(FILES importStaticPlugin.cpp DESTINATION ${MAGNUM_PLUGINS_INCLUDE_INSTALL_DIR}/TgaImporter)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.1)
     target_sources(TgaImporter INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/importStaticPlugin.cpp)
-    endif()
 endif()
 
 if(BUILD_TESTS)

src/MagnumPlugins/WavAudioImporter/CMakeLists.txt

@@ -66,9 +66,7 @@ install(FILES WavImporter.h ${CMAKE_CURRENT_BINARY_DIR}/configure.h
 # Automatic static plugin import
 if(BUILD_PLUGINS_STATIC)
     install(FILES importStaticPlugin.cpp DESTINATION ${MAGNUM_PLUGINS_INCLUDE_INSTALL_DIR}/WavAudioImporter)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.1)
     target_sources(WavAudioImporter INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/importStaticPlugin.cpp)
-    endif()
 endif()
 
 if(BUILD_TESTS)