This is required for programs using rocksdb and and typeinfo.
Otherwise, linking them fails with errors like this (that's ceph):
/nix/store/cg0k49h66nkdqx6ccwnqr0i4q0fnfznc-binutils-2.31.1/bin/ld: ../../lib/libos.a(RocksDBStore.cc.o):(.data.rel.ro._ZTIN12RocksDBStore14RocksWBHandlerE[_ZTIN12RocksDBStore14RocksWBHandlerE]+0x10): undefined reference to `typeinfo for rocksdb::WriteBatch::Handler'
/nix/store/cg0k49h66nkdqx6ccwnqr0i4q0fnfznc-binutils-2.31.1/bin/ld: ../../lib/libos.a(RocksDBStore.cc.o):(.data.rel.ro._ZTIN12RocksDBStore19MergeOperatorRouterE[_ZTIN12RocksDBStore19MergeOperatorRouterE]+0x10): undefined reference to `typeinfo for rocksdb::AssociativeMergeOperator'
/nix/store/cg0k49h66nkdqx6ccwnqr0i4q0fnfznc-binutils-2.31.1/bin/ld: ../../lib/libos.a(RocksDBStore.cc.o):(.data.rel.ro._ZTIN12RocksDBStore19MergeOperatorLinkerE[_ZTIN12RocksDBStore19MergeOperatorLinkerE]+0x10): undefined reference to `typeinfo for rocksdb::AssociativeMergeOperator'
/nix/store/cg0k49h66nkdqx6ccwnqr0i4q0fnfznc-binutils-2.31.1/bin/ld: ../../lib/libos.a(RocksDBStore.cc.o):(.data.rel.ro._ZTI17CephRocksdbLogger[_ZTI17CephRocksdbLogger]+0x10): undefined reference to `typeinfo for rocksdb::Logger'
/nix/store/cg0k49h66nkdqx6ccwnqr0i4q0fnfznc-binutils-2.31.1/bin/ld: ../../lib/libos.a(BlueRocksEnv.cc.o):(.data.rel.ro._ZTI12BlueRocksEnv[_ZTI12BlueRocksEnv]+0x10): undefined reference to `typeinfo for rocksdb::EnvWrapper'
/nix/store/cg0k49h66nkdqx6ccwnqr0i4q0fnfznc-binutils-2.31.1/bin/ld: ../../lib/libos.a(BlueRocksEnv.cc.o):(.data.rel.ro._ZTI23BlueRocksSequentialFile[_ZTI23BlueRocksSequentialFile]+0x10): undefined reference to `typeinfo for rocksdb::SequentialFile'
/nix/store/cg0k49h66nkdqx6ccwnqr0i4q0fnfznc-binutils-2.31.1/bin/ld: ../../lib/libos.a(BlueRocksEnv.cc.o):(.data.rel.ro._ZTI25BlueRocksRandomAccessFile[_ZTI25BlueRocksRandomAccessFile]+0x10): undefined reference to `typeinfo for rocksdb::RandomAccessFile'
/nix/store/cg0k49h66nkdqx6ccwnqr0i4q0fnfznc-binutils-2.31.1/bin/ld: ../../lib/libos.a(BlueRocksEnv.cc.o):(.data.rel.ro._ZTI21BlueRocksWritableFile[_ZTI21BlueRocksWritableFile]+0x10): undefined reference to `typeinfo for rocksdb::WritableFile'
/nix/store/cg0k49h66nkdqx6ccwnqr0i4q0fnfznc-binutils-2.31.1/bin/ld: ../../lib/libos.a(BlueRocksEnv.cc.o):(.data.rel.ro._ZTI17BlueRocksFileLock[_ZTI17BlueRocksFileLock]+0x10): undefined reference to `typeinfo for rocksdb::FileLock'
I think those deps could be made to build, but I didn't want to get
bogged down investigating further. "Use flags" are always a good thing,
so this is fine for now.
* add patch for CVE-2017-8372 and CVE-2017-8373
* add patch for CVE-2017-8374
* add patch for x86_64 platforms
* fetch existing patches from remote sources
Most other packages don't move `.a` files to "$dev", and that is because
it makes the pkg-config `.pc` file wrong (the `libdir` is the non-dev one).
Keeping them in the main output makes static linking of SDL2 work.
See added comment about pruning of `.la` files.
Timothy DeHerrera