Put mac specific changes into mac specific files.

Update mac build instructions.

INSTALL.md

@@ -120,7 +120,7 @@ cd hush
 # fetch key
 ./zcutil/fetch-params.sh
 # Build
-./zcutil/build-mac.sh --disable-rust
+./zcutil/build-mac.sh
 # Run a HUSH node
 ./src/hushd
 ```

depends/packages/packages.mk

@@ -1,5 +1,5 @@
-#rust_packages := rust librustzcash
-#proton_packages := proton
+rust_packages := rust librustzcash
+proton_packages := proton
 zcash_packages := libgmp libsodium
 packages := boost openssl libevent zeromq $(zcash_packages) googletest googlemock
 native_packages := native_ccache

zcutil/build-mac.sh

@@ -51,14 +51,22 @@ then
     shift
 fi
 
+# If --enable-proton is the next argument, enable building Proton code:
+PROTON_ARG='--enable-proton=no'
+if [ "x${1:-}" = 'x--enable-proton' ]
+then
+    PROTON_ARG=''
+    shift
+fi
+
 TRIPLET=`./depends/config.guess`
 PREFIX="$(pwd)/depends/$TRIPLET"
 
-NO_RUST="$RUST_ARG" make "$@" -C ./depends/ V=1 NO_QT=1
+NO_RUST="$RUST_ARG" NO_PROTON="$PROTON_ARG" make "$@" -C ./depends/ V=1 NO_QT=1
 
 ./autogen.sh
 CPPFLAGS="-I$PREFIX/include -arch x86_64" LDFLAGS="-L$PREFIX/lib -arch x86_64 -Wl,-no_pie" \
 CXXFLAGS='-arch x86_64 -I/usr/local/Cellar/gcc5/5.4.0/include/c++/5.4.0 -I$PREFIX/include -fwrapv -fno-strict-aliasing -Werror -g -Wl,-undefined -Wl,dynamic_lookup' \
-./configure --prefix="${PREFIX}" --with-gui=no "$HARDENING_ARG" "$LCOV_ARG" "$RUST_ARG" "$MINING_ARG"
+./configure --prefix="${PREFIX}" --with-gui=no "$HARDENING_ARG" "$LCOV_ARG" "$RUST_ARG" "$PROTON_ARG" "$MINING_ARG"
 
 make "$@" V=1 NO_GTEST=0 STATIC=1