Improve finding of sqlite with vcpkg

We use

    qt_find_package(SQLite3 PROVIDED_TARGETS SQLite::SQLite3)

which intends to find cmake's FindSQLite3.cmake and expects the
existence of the corresponding target. However qt_find_package first
tries to call find_package in config mode, which does not interact well
with vcpkg's sqlite, where sqlite3-config.cmake is provided to support
multi-config targets. So that call will appear to succeed, yet the
expected targets are not there of course.

Therefore this patch adds a sanity check for the target existence and
allows for a fallback to the module mode for find_package, in order to
find CMake's FindSQLite3.cmake.

Change-Id: I660f26c38369c3504df1c590e9d3a51ff1f65c6c
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

0 files changed, 0 insertions, 0 deletions