Without the change `qseq66` fails to load as:
$ qseq66
qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
While at it added `mainProgram`.
Without the chnage build fails on `master` as:
In file included from os/daemonize.cpp:64:
../include/os/daemonize.hpp:58:8: error: 'uint32_t' does not name a type
58 | extern uint32_t daemonize
| ^~~~~~~~
../include/os/daemonize.hpp:36:1: note: 'uint32_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
35 | #include "seq66_platform_macros.h" /* for detecting 32-bit builds */
+++ |+#include <cstdint>
As upstream changes are quite invasive for backport I am only injecting
missing headers.