Without this, configure will say:
Checking for openal... no
/tmp/nix-build-qtmultimedia-5.5.0.drv-0/qtmultimedia-opensource-src-5.5.0/qtmultimedia.pro:28:
Variable GST_VERSION is not defined.
Checking for resourcepolicy... no
And there may be application runtime errors like
defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.camera"
After this fix, configure will say:
Checking for openal... no
Checking for gstreamer... yes
Checking for gstreamer_photography... no
Checking for gstreamer_encodingprofiles... yes
Checking for gstreamer_appsrc... yes
Checking for linux_v4l... yes
Checking for resourcepolicy... no
And the above runtime error will not appear.
This fix is similar to 449b6028 ("qt5.multimedia: fix gstreamer
support."), except with Qt 5.5 we also need to set GST_VERSION.
Following a commit by @k0ral, this completes the upgrade of the other
`mediainfo` components.
From the changelog:
```
Version 0.7.79, 2015-11-02
+ CLI/DLL only, XML: new option --Output=MIXML, with XML v2.0beta1
status, not for production, see
https://github.com/MediaArea/MediaAreaXml for more details
+ MediaTrace: support of more than 1 file in XML output.
+ CLI/DLL only, XML: new option --Output=MAXML, with XML v0.1 status, in
order to have bot MediaInfo and MediaTrace in the same output, not for
production, see https://github.com/MediaArea/MediaAreaXml for more
details
x MediaTrace: fixed some invalid outputs
x #B951, Amazon S3 support (REST API v2), CLI/DLL only and if compiled
with libcurl support: URL without credential were badly interpreted
```
The `f_check` script uses `which` to check that the Fortran compiler is
available. `which` is a shell built-in on NixOS, but not on Darwin or
other Linuxes.
Upstream began shipping OpenBLAS with LAPACK 3.4.1. This is the version
we were using in Nixpkgs anyway, so there is no reason to continue
copying the LAPACK sources into the build tree.
