cmake: Enable building of the db2 plugin

Change-Id: I26810cccba5f3128cb47e0bf53b5ec78de2eec8c
Reviewed-by: Qt CMake Build Bot
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

cmake/FindDB2.cmake

@@ -0,0 +1,59 @@
+#.rst:
+# FindDB2
+# ---------
+#
+# Try to locate the db2 client library.
+# If found, this will define the following variables:
+#
+# ``DB2_FOUND``
+#     True if the db2 library is available
+# ``DB2_INCLUDE_DIRS``
+#     The db2 include directories
+# ``DB2_LIBRARIES``
+#     The db2 libraries for linking
+#
+# If ``DB2_FOUND`` is TRUE, it will also define the following
+# imported target:
+#
+# ``DB2::DB2``
+#     The db2 client library
+
+if (NOT DEFINED DB2_INCLUDE_DIR)
+  find_path(DB2_INCLUDE_DIRS
+    NAMES sqlcli1.h
+    HINTS ENV DB2_HOME
+    PATH_SUFFIXES include)
+else()
+  find_path(DB2_INCLUDE_DIRS
+    NAMES sqlcli1.h
+    HINTS ${DB2_INCLUDE_DIR})
+endif()
+
+if (NOT DEFINED DB2_LIBRARY_DIR)
+  find_library(DB2_LIBRARIES
+    NAMES db2
+    HINTS ENV DB2LIB)
+else()
+  find_library(DB2_LIBRARIES
+    NAMES db2
+    HINTS ${DB2_LIBRARY_DIR})
+endif()
+
+if (NOT DB2_INCLUDE_DIRS STREQUAL "DB2_INCLUDE_DIRS-NOTFOUND" AND NOT DB2_LIBRARIES STREQUAL "DB2_LIBRARIES-NOTFOUND")
+  set(DB2_FOUND ON)
+endif()
+
+if(DB2_FOUND AND NOT TARGET DB2::DB2)
+  add_library(DB2::DB2 UNKNOWN IMPORTED)
+  set_target_properties(DB2::DB2 PROPERTIES
+                        IMPORTED_LOCATION "${DB2_LIBRARIES}"
+                        INTERFACE_INCLUDE_DIRECTORIES "${DB2_INCLUDE_DIRS}")
+endif()
+
+mark_as_advanced(DB2_INCLUDE_DIRS DB2_LIBRARIES)
+
+include(FeatureSummary)
+set_package_properties(DB2 PROPERTIES
+  URL "https://www.ibm.com"
+  DESCRIPTION "IBM DB2 client library")
+

src/plugins/sqldrivers/CMakeLists.txt

@@ -35,7 +35,7 @@ if(QT_FEATURE_sql_oci)
 endif()
 
 if(QT_FEATURE_sql_db2)
-#     TODO add_subdirectory(db2)
+     add_subdirectory(db2)
 endif()
 
 if(QT_FEATURE_sql_sqlite)

src/plugins/sqldrivers/configure.cmake

@@ -6,6 +6,7 @@
 
 #### Libraries
 
+qt_find_package(DB2 PROVIDED_TARGETS DB2::DB2)
 qt_find_package(MySQL PROVIDED_TARGETS MySQL::MySQL)
 qt_find_package(PostgreSQL PROVIDED_TARGETS PostgreSQL::PostgreSQL)
 qt_find_package(ODBC PROVIDED_TARGETS ODBC::ODBC)
@@ -20,7 +21,7 @@ qt_find_package(SQLite3 PROVIDED_TARGETS SQLite::SQLite3)
 
 qt_feature("sql_db2" PRIVATE
     LABEL "DB2 (IBM)"
-    CONDITION libs.db2 OR FIXME
+    CONDITION DB2_FOUND
 )
 qt_feature("sql_ibase" PRIVATE
     LABEL "InterBase"

src/plugins/sqldrivers/db2/CMakeLists.txt

@@ -0,0 +1,35 @@
+# Generated from db2.pro.
+
+#####################################################################
+## qsqldb2 Plugin:
+#####################################################################
+
+add_qt_plugin(qsqldb2
+    TYPE sqldrivers
+    CLASS_NAME QDB2DriverPlugin
+    SOURCES
+        main.cpp
+        qsql_db2.cpp qsql_db2_p.h
+    DEFINES
+        QT_NO_CAST_FROM_ASCII
+        QT_NO_CAST_TO_ASCII
+    LIBRARIES
+        Qt::CorePrivate
+        Qt::SqlPrivate
+    PUBLIC_LIBRARIES
+        DB2::DB2
+        Qt::Core
+        Qt::Sql
+)
+
+#### Keys ignored in scope 1:.:.:db2.pro:<TRUE>:
+# OTHER_FILES = "db2.json"
+# PLUGIN_CLASS_NAME = "QDB2DriverPlugin"
+
+## Scopes:
+#####################################################################
+
+extend_target(qsqldb2 CONDITION (TEST_architecture_arch STREQUAL "x86_64")
+    DEFINES
+        ODBC64
+)

util/cmake/helper.py

@@ -190,6 +190,7 @@ _library_map = [
     LibraryMapping('atspi', 'ATSPI2', 'PkgConfig::ATSPI2'),
     LibraryMapping('corewlan', None, None),
     LibraryMapping('cups', 'Cups', 'Cups::Cups'),
+    LibraryMapping('db2', 'DB2', 'DB2::DB2'),
     LibraryMapping('dbus', 'WrapDBus1', 'dbus-1', resultVariable="DBus1"),
     LibraryMapping('doubleconversion', None, None),
     LibraryMapping('drm', 'Libdrm', 'Libdrm::Libdrm'),