Bug#786988: qtbase-opensource-src: QT_PLUGIN_PATH env variable ignored on debian builds

[David Edmundson <davidedmundson@kde.org>]

Source: qtbase-opensource-src
Version: 5.3.2
Severity: normal
Tags: patch

Dear Maintainer,

The code in qtbase effectively says

if (plugin dir is explicitly set)
  use explicitly set directory
else
  look in QT_PLUGIN_PATH then default place

Debian packages explicitly set the plugin directory to be the default.
This doesn't have any benefit, but causes an important feature for developers to not work.

Removing -plugindir from the ./configure lines in rules fixes this.

-- System Information:
Debian Release: jessie/sid
  APT prefers vivid-updates
  APT policy: (500, 'vivid-updates'), (500, 'vivid-security'), (500, 'vivid'), (100, 'vivid-backports')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.19.0-16-generic (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)