From a6b71f0bd6c9c83ee74bbebc647cca982561e08a Mon Sep 17 00:00:00 2001
From: King_DuckZ <king_duckz@gmx.com>
Date: Mon, 23 Oct 2017 10:48:39 +0100
Subject: [PATCH] Link to system's sqlite if user doesn't want to use the one
 from SQLiteCpp.

---
 cmake/Modules/Findsqlite3.cmake    | 96 ++++++++++++++++++++++++++++++
 src/backends/sqlite/CMakeLists.txt |  8 +++
 2 files changed, 104 insertions(+)
 create mode 100644 cmake/Modules/Findsqlite3.cmake

diff --git a/cmake/Modules/Findsqlite3.cmake b/cmake/Modules/Findsqlite3.cmake
new file mode 100644
index 0000000..d601838
--- /dev/null
+++ b/cmake/Modules/Findsqlite3.cmake
@@ -0,0 +1,96 @@
+# - Try to find Sqlite3
+# Once done this will define
+#
+#  SQLITE3_FOUND - system has Sqlite3
+#  SQLITE3_INCLUDE_DIRS - the Sqlite3 include directory
+#  SQLITE3_LIBRARIES - Link these to use Sqlite3
+#  SQLITE3_DEFINITIONS - Compiler switches required for using Sqlite3
+#
+#  Copyright (c) 2008 Andreas Schneider <mail@cynapses.org>
+#
+#  Redistribution and use is allowed according to the terms of the New
+#  BSD license.
+#  For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+#
+
+
+if (SQLITE3_LIBRARIES AND SQLITE3_INCLUDE_DIRS)
+  # in cache already
+  set(SQLITE3_FOUND TRUE)
+else (SQLITE3_LIBRARIES AND SQLITE3_INCLUDE_DIRS)
+  # use pkg-config to get the directories and then use these values
+  # in the FIND_PATH() and FIND_LIBRARY() calls
+  if (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)
+    include(UsePkgConfig)
+    pkgconfig(sqlite3 _SQLITE3_INCLUDEDIR _SQLITE3_LIBDIR _SQLITE3_LDFLAGS _SQLITE3_CFLAGS)
+  else (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)
+    find_package(PkgConfig)
+    if (PKG_CONFIG_FOUND)
+      pkg_check_modules(_SQLITE3 sqlite3)
+    endif (PKG_CONFIG_FOUND)
+  endif (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)
+  find_path(SQLITE3_INCLUDE_DIR
+    NAMES
+      sqlite3.h
+    PATHS
+      ${_SQLITE3_INCLUDEDIR}
+      /usr/include
+      /usr/local/include
+      /opt/local/include
+      /sw/include
+  )
+
+  find_library(SQLITE3_LIBRARY
+    NAMES
+      sqlite3
+    PATHS
+      ${_SQLITE3_LIBDIR}
+      /usr/lib
+      /usr/local/lib
+      /opt/local/lib
+      /sw/lib
+  )
+
+  if (SQLITE3_LIBRARY)
+    set(SQLITE3_FOUND TRUE)
+  endif (SQLITE3_LIBRARY)
+
+  set(SQLITE3_INCLUDE_DIRS
+    ${SQLITE3_INCLUDE_DIR}
+  )
+
+  if (SQLITE3_FOUND)
+    set(SQLITE3_LIBRARIES
+      ${SQLITE3_LIBRARIES}
+      ${SQLITE3_LIBRARY}
+    )
+  endif (SQLITE3_FOUND)
+
+  if (SQLITE3_INCLUDE_DIRS AND SQLITE3_LIBRARIES)
+     set(SQLITE3_FOUND TRUE)
+  endif (SQLITE3_INCLUDE_DIRS AND SQLITE3_LIBRARIES)
+
+  if (SQLITE3_FOUND)
+    if (NOT Sqlite3_FIND_QUIETLY)
+      message(STATUS "Found Sqlite3: ${SQLITE3_LIBRARIES}")
+    endif (NOT Sqlite3_FIND_QUIETLY)
+  else (SQLITE3_FOUND)
+    if (Sqlite3_FIND_REQUIRED)
+      message(FATAL_ERROR "Could not find Sqlite3")
+    endif (Sqlite3_FIND_REQUIRED)
+  endif (SQLITE3_FOUND)
+
+  # show the SQLITE3_INCLUDE_DIRS and SQLITE3_LIBRARIES variables only in the advanced view
+  mark_as_advanced(SQLITE3_INCLUDE_DIRS SQLITE3_LIBRARIES)
+
+endif (SQLITE3_LIBRARIES AND SQLITE3_INCLUDE_DIRS)
+
+if (SQLITE3_FOUND)
+	if (NOT TARGET SQLite3::SQLite3)
+		add_library(SQLite3::SQLite3 UNKNOWN IMPORTED)
+		set_target_properties(SQLite3::SQLite3 PROPERTIES
+			INTERFACE_INCLUDE_DIRECTORIES "${SQLITE3_INCLUDE_DIRS}"
+			IMPORTED_LOCATION "${SQLITE3_LIBRARIES}"
+		)
+	endif()
+endif()
diff --git a/src/backends/sqlite/CMakeLists.txt b/src/backends/sqlite/CMakeLists.txt
index ad2650e..45d87f1 100644
--- a/src/backends/sqlite/CMakeLists.txt
+++ b/src/backends/sqlite/CMakeLists.txt
@@ -1,5 +1,12 @@
 project(${bare_name}-backend-sqlite CXX)
 
+if (SQLITECPP_INTERNAL_SQLITE)
+	set(sqlite3_lib "sqlite3")
+else()
+	find_package(sqlite3 REQUIRED)
+	set(sqlite3_lib "SQLite3::SQLite3")
+endif()
+
 add_library(${PROJECT_NAME} SHARED
 	backend_sqlite.cpp
 )
@@ -7,6 +14,7 @@ add_library(${PROJECT_NAME} SHARED
 target_link_libraries(${PROJECT_NAME}
 	PRIVATE ${bare_name}-inc
 	PRIVATE SQLiteCpp
+	PRIVATE ${sqlite3_lib}
 )
 
 install(TARGETS ${PROJECT_NAME}