Also enable -Wunused-parameter - this forces us to add the gcc
"unused" attribute to a lot of parameters (mostly library callback
functions), but it's worth it during code refactorizations.

Signed-off-by: Eric Wong <normalperson@yhbt.net>

git-svn-id: https://svn.musicpd.org/mpd/trunk@7145 09075e82-0dd4-0310-85a5-a0d7c8717e4f

This will make refactoring features easier, especially now that
pthreads support and larger refactorings are on the horizon.

Hopefully, this will make porting to other platforms (even
non-UNIX-like ones for masochists) easier, too.

os_compat.h will house all the #includes for system headers
considered to be the "core" of MPD.  Headers for optional
features will be left to individual source files.

git-svn-id: https://svn.musicpd.org/mpd/trunk@7130 09075e82-0dd4-0310-85a5-a0d7c8717e4f

git-svn-id: https://svn.musicpd.org/mpd/trunk@5834 09075e82-0dd4-0310-85a5-a0d7c8717e4f

I'm checking for zero-size allocations and assert()-ing them,
so we can more easily get backtraces and debug problems, but we'll
also allow -DNDEBUG people to live on the edge if they wish.

We do not rely on errno when checking for OOM errors because
some implementations of malloc do not set it, and malloc
is commonly overridden by userspace wrappers.

I've spent some time looking through the source and didn't find any
obvious places where we would explicitly allocate 0 bytes, so we
shouldn't trip any of those assertions.

We also avoid allocating zero bytes because C libraries don't
handle this consistently (some return NULL, some not); and it's
dangerous either way.

git-svn-id: https://svn.musicpd.org/mpd/trunk@4690 09075e82-0dd4-0310-85a5-a0d7c8717e4f

Add -Wmissing-prototypes if compiling with gcc
Static where possible

git-svn-id: https://svn.musicpd.org/mpd/trunk@4657 09075e82-0dd4-0310-85a5-a0d7c8717e4f

git-svn-id: https://svn.musicpd.org/mpd/trunk@4604 09075e82-0dd4-0310-85a5-a0d7c8717e4f

Not everybody has access to the latest and greatest compilers.

git-svn-id: https://svn.musicpd.org/mpd/trunk@4595 09075e82-0dd4-0310-85a5-a0d7c8717e4f

-use tree for tagTracker
-eliminate the master process

git-svn-id: https://svn.musicpd.org/mpd/trunk@4571 09075e82-0dd4-0310-85a5-a0d7c8717e4f

merged back into trunk

git-svn-id: https://svn.musicpd.org/mpd/trunk@4535 09075e82-0dd4-0310-85a5-a0d7c8717e4f

tree optimization: reduce the number of compares required for insertion and deletion by storing the position in the parent node of each child

git-svn-id: https://svn.musicpd.org/mpd/trunk@4532 09075e82-0dd4-0310-85a5-a0d7c8717e4f

git-svn-id: https://svn.musicpd.org/mpd/trunk@4508 09075e82-0dd4-0310-85a5-a0d7c8717e4f

git-svn-id: https://svn.musicpd.org/mpd/trunk@4507 09075e82-0dd4-0310-85a5-a0d7c8717e4f

git-svn-id: https://svn.musicpd.org/mpd/trunk@4506 09075e82-0dd4-0310-85a5-a0d7c8717e4f

next is to clean up the code and make obvious optimizations

git-svn-id: https://svn.musicpd.org/mpd/trunk@4502 09075e82-0dd4-0310-85a5-a0d7c8717e4f

git-svn-id: https://svn.musicpd.org/mpd/trunk@4498 09075e82-0dd4-0310-85a5-a0d7c8717e4f

*) add copyright notice
*) implemented node deletion, but not yet tested

git-svn-id: https://svn.musicpd.org/mpd/trunk@4496 09075e82-0dd4-0310-85a5-a0d7c8717e4f

*) when CHILDREN_PER_NODE is large, use binary search
*) add a iterator implementation
*) some code cleanup

git-svn-id: https://svn.musicpd.org/mpd/trunk@4492 09075e82-0dd4-0310-85a5-a0d7c8717e4f

git-svn-id: https://svn.musicpd.org/mpd/trunk@4487 09075e82-0dd4-0310-85a5-a0d7c8717e4f

Remove dead code
Static where possible

git-svn-id: https://svn.musicpd.org/mpd/trunk@4345 09075e82-0dd4-0310-85a5-a0d7c8717e4f

git-svn-id: https://svn.musicpd.org/mpd/trunk@4333 09075e82-0dd4-0310-85a5-a0d7c8717e4f

the GPL header where necessary

git-svn-id: https://svn.musicpd.org/mpd/trunk@4317 09075e82-0dd4-0310-85a5-a0d7c8717e4f

git-svn-id: https://svn.musicpd.org/mpd/trunk@2984 09075e82-0dd4-0310-85a5-a0d7c8717e4f