GCC5 cannot build mpd.
Signed-off-by: Rosen Penev <rosenp@gmail.com>

Need to check for it in iconv.h. Otherwise meson prefixes a __builtin variant in the check.

Preparing to replace `smbclient_mutex`, for finer-grained locking.

We no longer need to call smbc_init() because we don't need the compat
layer anymore.

As a side effect, the input plugin closes the SMB/CIFS connection
after closing the file.

This solves one part of
https://github.com/MusicPlayerDaemon/MPD/issues/916

Prepare for templated functions.

Our Windows build is built with `--disable-netrc`, and that makes
CURLOPT_NETRC fail, causing failures with all streams.  D'oh!

Closes https://github.com/MusicPlayerDaemon/MPD/issues/886

The ones in std have overloads for const char/char.
Signed-off-by: Rosen Penev <rosenp@gmail.com>

Passing `length+1` to `MultiByteToWideChar()` means the function may
fill the whole buffer with output data, and could theoretically
overwrite the null terminator.  In practice, this will never happen,
but this way, it's slightly more correct.

Also, null-terminate after `MultiByteToWideChar()`, after we got the
real output length.  Again, this would never have been a problem, but
who knows...

libavutil's macro definition is a compound literal, which is illegal
in C++.  Fixes yet another -Wpedantic warning.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

This makes ccache more efficient when recompiling with different
plugins.

libnfs is compiled with `-D_FILE_OFFSET_BITS=64`, but Meson decides
not to enable this mode.  We could force this mode, but then again,
these days, nobody should be using 32-bit Windows ... so this is a
kludge only for debugging with 32-bit WINE.

This flag is output-only.

The object's state is `IDLE` when OnNfsCallback() gets invoked, so
let's use the start of the method to reset the `state` field.

Fixes assertion failure if the callback fails.

Using CompareStringEx() and FindNLSStringEx().

Implements a missing piece for
https://github.com/MusicPlayerDaemon/MPD/issues/820

LINGUISTIC_IGNORECASE is unimplemented on Wine, but since we don't
have any locale support (yet), and we're using LOCALE_NAME_INVARIANT,
NORM_IGNORECASE should essentially be the same, so why bother.

Reverts commit fb3564fb

LCMapStringEx() doesn't do what I imagined it would do 5 years ago.
D'oh!

Closes https://github.com/MusicPlayerDaemon/MPD/issues/820

Eliminates lots of overhead.

std::all_of becomes constexpr in C++20. I'm not sure it results in better
performance.

Found with useStlAlgorithm
Signed-off-by: Rosen Penev <rosenp@gmail.com>