Certain tools, e.g. compilers, are customarily prefixed with the name of
their target platform so that multiple builds can be used at once
without clobbering each other on the PATH. I was using identifiers named
`prefix` for this purpose, but that conflicts with the standard use of
`prefix` to mean the directory where something is installed. To avoid
conflict and confusion, I renamed those to `targetPrefix`.
Packages get --host and --target by default, but can explicitly request
any subset to be passed as needed. See docs for more info.
rustc: Avoid hash breakage by using the old (ignored)
dontSetConfigureCross when not cross building
The most complex problems were from dealing with switches reverted in
the meantime (gcc5, gmp6, ncurses6).
It's likely that darwin is (still) broken nontrivially.
+ adds a minimal dependency version of ffmpeg as the default
+ the current ffmpeg changes have been moved to ffmpeg-full
+ ffmpeg default 2.5 -> 2.6
+ removed ffmpeg 0.5 & 2.5 (unused versions)
Close#7160.
+ Removed asserts for (l)gpl & (l)gpl3 making it easier to enable and disable all
(l)gpl & (l)gpl3 portions
+ Fix build inputs so that nonfree software isn't pulled in when building ffmpeg
+ Fix compiler on systems with clang
+ Disable libraries that fail on darwin until they can be fixed
+ Fix linux only build inputs so that they aren't pulled in on other platforms
+ Fix optional build inputs
+ Opencv causes circular dependency issues so it is disabled until it can be resolved
/cc maintainers @codyopel, @fuuzetsu.
Release notes don't indicate any new options or dependencies.
http://git.videolan.org/?p=ffmpeg.git;a=blob;f=RELEASE_NOTES;hb=release/2.6
APIchanges looks like we should be able to replace 2.5 by 2.6
without anything breaking (belongs to staging and needs some testing).
