Add support for building as a static plugin.

Author: Simon Knopp

CMakeLists.txt

@@ -13,7 +13,17 @@ set(CMAKE_AUTOMOC ON)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/sqldrivers)
 
-add_library(qsqlcipher MODULE
+option(STATIC "Build plugin as a static library" OFF)
+if(STATIC)
+    set(LIBTYPE STATIC)
+    add_definitions(-DQT_STATICPLUGIN)
+    add_subdirectory(test-static)
+else()
+    set(LIBTYPE MODULE)
+    add_subdirectory(test-shared)
+endif()
+
+add_library(qsqlcipher ${LIBTYPE}
     smain.cpp
     qt-private/qsql_sqlite.cpp
 )
@@ -28,4 +38,3 @@ target_link_libraries(qsqlcipher
     ${SQLCIPHER_LIBRARIES}
 )
 
-add_subdirectory(test)

README.md

@@ -34,6 +34,19 @@ Follow [Qt's plugin deployment guide](http://doc.qt.io/qt-5/deployment-plugins.h
 In short, put the plugin at ``sqldrivers/libqsqlcipher.so`` relative to your
 executable.
 
+
+## Static linking
+
+You can also build the plugin statically by passing ``-DSTATIC=ON`` to CMake.
+When you build your application which uses the static plugin, you'll need to
+include the line ``Q_IMPORT_PLUGIN(QSQLCipherDriverPlugin);`` in one of your
+source files and define ``QT_STATICPLUGIN`` at compile time. And link to the
+static plugin, of course.
+
+Note that setting ``-DSTATIC=ON`` only builds *this plugin* as a static library.
+If you also want to link to static versions of Qt and/or SQLCipher, it's up to
+you to make sure CMake finds static versions of those libraries.
+
 -----
 
 ## Old version

test/CMakeLists.txt test-shared/CMakeLists.txttest/CMakeLists.txt renamed to test-shared/CMakeLists.txt

@@ -0,0 +1,3 @@
+# Same as for test-shared, but statically link the plugin
+include(../test-shared/CMakeLists.txt)
+target_link_libraries(qsqlcipher-test qsqlcipher)

test/main.cpp test-shared/main.cpptest/main.cpp renamed to test-shared/main.cpp

@@ -0,0 +1,4 @@
+// Same as for test-shared, but manually import the static plugin
+#include <QtPlugin>
+Q_IMPORT_PLUGIN(QSQLCipherDriverPlugin);
+#include "../test-shared/main.cpp"