Update the build environment container to use the gitlab.xiph.org
url instead of the no-longer-available git.xiph.org.

This is faster. We still don't have good dependency tracking
among the components, but roughly:

    make
    make opusfile-0.dll
    make package

Should automate the basics of putting together a win32 binary
package. It still doesn't include documentation. See the
mingw/README for additional steps there.

Also, don't copy dll.a files. They don't seem to be necessary.

Invoking ../configure from the mingw directory would clobber
the mingw-specific Makefile, which is confusing. Instead
have the `make opusfile` target invoke the autotools build
within a subdirectory.

Download the most recent working release of openssl.
- Enable asm, since it seems to work now.
- Link ssl and crypto libraries statically, since the
  dll target seems to be broken.

The 1.0.2 series of openssl releases is no longer supported.
However, 1.1.1 and later broke the hooks we were using to
reference the Windows certificate store, so this is also
the newest release where opusurl works.

As such, this shouldn't be used in production (unless you have a
support contract for openssl!) but it's a useful reference
configuration to have in the repository.

Hopefully a replacement api will be available in openssl 3 or 4
and we can port to that for future releases.

This seems to have changed to be more like the unix build.
We'll probably need libcrypto-1_1.dll too, but I haven't
gotten to the link step yet. This fails because of api
changes between (no longer supported) 1.0.x versions
and the current stable 1.1.

This was a reference from an older build script and it no longer
necessary. Having in the Makefile just confuses things.

We had a request for 64-bit Windows binaries at some point, but
win32 is more broadly compatible. Since everything's broken,
let's concentrate on that and add rules to generate a separate
opusfile-${version}-win64 package later.

Latest release versions and checksums.

This is the current release.

The gcc runtime dll filename has changed, so the package script
is also updated.

In theory `mingw/Makefile` can build a binary release, but
it doensn't quite works and omits some niceties, so we still
need the detailed build instructions to compare with.

However, the details aren't relevent to the general release
checklist, so pretend `make -C ming package` works at that
level.

Also convert the mingw README to markdown for better
display on hosting sites.

New upstream release (soon to be final).

This is the current stable release. The fedora:25 image is no longer
receiving updates.

New upstream release.

New upstream release some time ago.

New release of the codec reference implementation.

New release of the codec reference implementation.

downloads.xiph.org recently got https support.

I think it's less confusing for most users to omit this. I added
it so I could distinguish the docker-hosted cross package from
others, but it's a distraction for people trying to use the
resulting binaries.

We build from a git repo, so we can call `git describe` to
generate a version number. When building from a tag, this
should give us a clean release-versioned filename.

fedora:24 will be end-of-life soon.

opus 1.1.5
openssl 1.0.2l

There's a newer branch (openssl 1.1.x) availabe now, but the
build script needs changes to make it work. Stay on 1.0.2 for now.

The fedora docker images ship without the necessary metadata
to reconstruct rpm packages from installed data, so attempting
to download delta rpm packages when updating the system just
wastes time and bandwidth.

The file in the parent directory was renamed; change the
reference in the Makefile as well.

Latest stable release.

Build against latest stable upstream release.

This build works as well. I'm not sure what's wrong with my
local environment.

This does the basics to build the win32 binary release zipfile
for testing. Doesn't sign or version it properly.

The version of mingw in Fedora 21 works as well.
This is the first version to depend on libwinpthread.

Also add an autogen.sh invocation which caused the previous
build to fail after the 'make check' barrier was removed.

This requires wine to run the windows executables, which is a
pretty heavy dependency. Better to do without for now.

For some reason, when I cross-compile opusfile on Fedora 23,
I get example binaries with exit immediately without error.

Building them on Fedora 20 (in a docker container) produced
working binaries. Until we figure out what the bug is, include
this for convenience.

The build doesn't actually work because of the 'make check'
steps in the Makefile, which require wine.

For those who would like network access to be a separate step.

This doesn't work in a normal shell, but enables 'make -C mingw'
which is convenient.

Thanks to ron for the suggestion.

This builds win32 versions of the library and examples
on linux using the mingw-gcc cross toolchain and wine.

It also automates downloading and building the
required dependencies. Update the _URL and _SHA
variables to build against newer upstream releases.

Thanks to Ron and Mark Harris for help with the makefile.