build: protobuf dependency fixes, libusb build

- docker protobuf dependencies, cross-compilation
- device/trezor protobuf build fixes, try_compile
- libusb built under all platforms, used by trezor for direct connect

contrib/depends/packages/libusb.mk

@@ -11,13 +11,21 @@ endef
 define $(package)_set_vars
   $(package)_config_opts=--disable-shared
   $(package)_config_opts_linux=--with-pic --disable-udev
+  $(package)_config_opts_mingw32=--disable-udev
+  $(package)_config_opts_darwin=--disable-udev
 endef
 
-define $(package)_config_cmds
-  cp -f $(BASEDIR)/config.guess config.guess &&\
-  cp -f $(BASEDIR)/config.sub config.sub &&\
-  $($(package)_autoconf)
-endef
+ifneq ($(host_os),darwin)
+  define $(package)_config_cmds
+    cp -f $(BASEDIR)/config.guess config.guess &&\
+    cp -f $(BASEDIR)/config.sub config.sub &&\
+    $($(package)_autoconf)
+  endef
+else
+  define $(package)_config_cmds
+    $($(package)_autoconf)
+  endef
+endif
 
 define $(package)_build_cmd
   $(MAKE)
@@ -27,5 +35,5 @@ define $(package)_stage_cmds
   $(MAKE) DESTDIR=$($(package)_staging_dir) install
 endef
 
-define $(package)_postprocess_cmds                                                                                                          cp -f lib/libusb-1.0.a lib/libusb.a
+define $(package)_postprocess_cmds  cp -f lib/libusb-1.0.a lib/libusb.a
 endef

contrib/depends/packages/native_protobuf.mk

@@ -0,0 +1,28 @@
+package=protobuf3
+$(package)_version=3.6.1
+$(package)_download_path=https://github.com/protocolbuffers/protobuf/releases/download/v$($(package)_version)/
+$(package)_file_name=protobuf-cpp-$($(package)_version).tar.gz
+$(package)_sha256_hash=b3732e471a9bb7950f090fd0457ebd2536a9ba0891b7f3785919c654fe2a2529
+$(package)_cxxflags=-std=c++11
+
+define $(package)_set_vars
+  $(package)_config_opts=--disable-shared --prefix=$(build_prefix)
+  $(package)_config_opts_linux=--with-pic
+endef
+
+define $(package)_config_cmds
+  $($(package)_autoconf)
+endef
+
+define $(package)_build_cmds
+  $(MAKE) -C src libprotobuf.la all
+endef
+
+define $(package)_stage_cmds
+  $(MAKE) DESTDIR=$($(package)_staging_dir) -C src install install-libLTLIBRARIES install-nobase_includeHEADERS &&\
+  $(MAKE) DESTDIR=$($(package)_staging_dir) install-pkgconfigDATA
+endef
+
+define $(package)_postprocess_cmds
+  rm lib/libprotoc.a
+endef

contrib/depends/packages/packages.mk

@@ -1,12 +1,12 @@
-packages:=boost openssl libevent zeromq cppzmq zlib expat ldns cppzmq readline libiconv qt hidapi
-native_packages := native_ccache
+packages:=boost openssl libevent zeromq cppzmq zlib expat ldns cppzmq readline libiconv qt hidapi protobuf libusb
+native_packages := native_ccache native_protobuf
 
 wallet_packages=bdb
 
 darwin_native_packages = native_biplist native_ds_store native_mac_alias
 darwin_packages = sodium-darwin
 
-linux_packages = eudev libusb
+linux_packages = eudev
 
 ifeq ($(host_os),linux)
 packages += unwind