Greatly decreases zbar-lib transitive closure size: assertion messages
contain paths to Qt header files, causing zbar-lib to depend on
qtbase-dev.
The Qt specific mkDerivation normally does this automatically, but we
can't use it here due to having only a small part of the project being
Qt related.
Also fix D-Bus config dir path: The configure script is appending `/dbus-1/system.d`
so when we added passed in `$out/etc/dbus-1/system.d`, it ended up with extra nesting.
The original upstream at http://zbar.sourceforge.net/ has not produced a
new release or a new commit on their repository in about 7 years. Most
distros (Debian, Gentoo, Arch, ...) have switched already to the more
maintained fork at https://github.com/mchehab/zbar
Update dependencies from qt4 to qt5, reducing "electrum" closure size in
the process (now only depends on one Qt version).
Add Debian patches (with fetchpatch) to make things work. Among other
things, the patches port the application from V4L to V4L2.
This increases the closure size from 729 MiB to 730 MiB.
The following parameters are now available:
* hardeningDisable
To disable specific hardening flags
* hardeningEnable
To enable specific hardening flags
Only the cc-wrapper supports this right now, but these may be reused by
other wrappers, builders or setup hooks.
cc-wrapper supports the following flags:
* fortify
* stackprotector
* pie (disabled by default)
* pic
* strictoverflow
* format
* relro
* bindnow
