Make Rust compilation mandatory

The temporary integration check in CheckEquihashSolution() remains, until we
have "real" Rust code to integrate.

Closes #2688.

configure.ac

@@ -96,12 +96,6 @@ AC_ARG_ENABLE([mining],
   [enable_mining=$enableval],
   [enable_mining=yes])
 
-AC_ARG_ENABLE([rust],
-  [AS_HELP_STRING([--enable-rust],
-  [enable rust (default is yes)])],
-  [enable_rust=$enableval],
-  [enable_rust=yes])
-
 AC_ARG_ENABLE([proton],
   [AS_HELP_STRING([--disable-proton],
   [disable Proton (AMQP messaging)])],
@@ -728,10 +722,7 @@ AC_CHECK_LIB([gmp],[[__gmpn_sub_n]],GMP_LIBS=-lgmp, [AC_MSG_ERROR(libgmp missing
 AC_CHECK_HEADER([gmpxx.h],,AC_MSG_ERROR(libgmpxx headers missing))
 AC_CHECK_LIB([gmpxx],[main],GMPXX_LIBS=-lgmpxx, [AC_MSG_ERROR(libgmpxx missing)])
 
-RUST_LIBS=""
-if test x$enable_rust != xno; then
-  RUST_LIBS="-lrustzcash"
-fi
+RUST_LIBS="-lrustzcash"
 
 dnl Check for OpenMP support
 AX_OPENMP(
@@ -815,16 +806,6 @@ else
   AC_MSG_RESULT(no)
 fi
 
-dnl enable rust
-AC_MSG_CHECKING([if rust should be enabled])
-if test x$enable_rust != xno; then
-  AC_MSG_RESULT(yes)
-  AC_DEFINE(ENABLE_RUST, 1, [Define to 1 to enable Rust language dependent functions])
-
-else
-  AC_MSG_RESULT(no)
-fi
-
 AM_CONDITIONAL([ENABLE_ZMQ], [test "x$use_zmq" = "xyes"])
 
 AM_CONDITIONAL([ENABLE_PROTON], [test "x$use_proton" = "xyes"])
@@ -854,7 +835,6 @@ AM_CONDITIONAL([BUILD_DARWIN], [test x$BUILD_OS = xdarwin])
 AM_CONDITIONAL([TARGET_WINDOWS], [test x$TARGET_OS = xwindows])
 AM_CONDITIONAL([ENABLE_WALLET],[test x$enable_wallet = xyes])
 AM_CONDITIONAL([ENABLE_MINING],[test x$enable_mining = xyes])
-AM_CONDITIONAL([ENABLE_RUST],[test x$enable_rust = xyes])
 AM_CONDITIONAL([ENABLE_TESTS],[test x$BUILD_TEST = xyes])
 AM_CONDITIONAL([USE_LCOV],[test x$use_lcov = xyes])
 AM_CONDITIONAL([GLIBC_BACK_COMPAT],[test x$use_glibc_compat = xyes])
@@ -947,7 +927,6 @@ esac
 echo 
 echo "Options used to compile and link:"
 echo "  with wallet   = $enable_wallet"
-echo "  with rust     = $enable_rust"
 echo "  with proton   = $use_proton"
 echo "  with zmq      = $use_zmq"
 echo "  with test     = $use_tests"

depends/Makefile

@@ -72,11 +72,10 @@ include builders/$(build_os).mk
 include builders/default.mk
 include packages/packages.mk
 
-rust_packages_$(NO_RUST) = $(rust_packages)
 wallet_packages_$(NO_WALLET) = $(wallet_packages)
 proton_packages_$(NO_PROTON) = $(proton_packages)
 
-packages += $($(host_arch)_$(host_os)_packages) $($(host_os)_packages) $(rust_packages_) $(proton_packages_) $(wallet_packages_)
+packages += $($(host_arch)_$(host_os)_packages) $($(host_os)_packages) $(rust_packages) $(proton_packages_) $(wallet_packages_)
 native_packages += $($(host_arch)_$(host_os)_native_packages) $($(host_os)_native_packages)
 all_packages = $(packages) $(native_packages)
 

src/pow.cpp

@@ -16,9 +16,7 @@
 
 #include "sodium.h"
 
-#ifdef ENABLE_RUST
 #include "librustzcash.h"
-#endif // ENABLE_RUST
 
 unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock, const Consensus::Params& params)
 {
@@ -100,13 +98,11 @@ bool CheckEquihashSolution(const CBlockHeader *pblock, const CChainParams& param
     // H(I||V||...
     crypto_generichash_blake2b_update(&state, (unsigned char*)&ss[0], ss.size());
 
-    #ifdef ENABLE_RUST
     // Ensure that our Rust interactions are working in production builds. This is
     // temporary and should be removed.
     {
         assert(librustzcash_xor(0x0f0f0f0f0f0f0f0f, 0x1111111111111111) == 0x1e1e1e1e1e1e1e1e);
     }
-    #endif // ENABLE_RUST
 
     bool isValid;
     EhIsValidSolution(n, k, state, pblock->nSolution, isValid);

zcutil/build.sh

@@ -54,7 +54,7 @@ Usage:
 $0 --help
   Show this help message and exit.
 
-$0 [ --enable-lcov || --disable-tests ] [ --disable-mining ] [ --disable-rust ] [ --enable-proton ] [ --disable-libs ] [ MAKEARGS... ]
+$0 [ --enable-lcov || --disable-tests ] [ --disable-mining ] [ --enable-proton ] [ --disable-libs ] [ MAKEARGS... ]
   Build Zcash and most of its transitive dependencies from
   source. MAKEARGS are applied to both dependencies and Zcash itself.
 
@@ -65,12 +65,9 @@ $0 [ --enable-lcov || --disable-tests ] [ --disable-mining ] [ --disable-rust ]
   If --disable-mining is passed, Zcash is configured to not build any mining
   code. It must be passed after the test arguments, if present.
 
-  If --disable-rust is passed, Zcash is configured to not build any Rust language
-  assets. It must be passed after test/mining arguments, if present.
-
   If --enable-proton is passed, Zcash is configured to build the Apache Qpid Proton
   library required for AMQP support. This library is not built by default.
-  It must be passed after the test/mining/Rust arguments, if present.
+  It must be passed after the test/mining arguments, if present.
 
   If --disable-libs is passed, Zcash is configured to not build any libraries like
   'libzcashconsensus'.
@@ -103,14 +100,6 @@ then
     shift
 fi
 
-# If --disable-rust is the next argument, disable Rust code:
-RUST_ARG=''
-if [ "x${1:-}" = 'x--disable-rust' ]
-then
-    RUST_ARG='--enable-rust=no'
-    shift
-fi
-
 # If --enable-proton is the next argument, enable building Proton code:
 PROTON_ARG='--enable-proton=no'
 if [ "x${1:-}" = 'x--enable-proton' ]
@@ -135,7 +124,7 @@ eval "$CXX" --version
 as --version
 ld -v
 
-HOST="$HOST" BUILD="$BUILD" NO_RUST="$RUST_ARG" NO_PROTON="$PROTON_ARG" "$MAKE" "$@" -C ./depends/ V=1
+HOST="$HOST" BUILD="$BUILD" NO_PROTON="$PROTON_ARG" "$MAKE" "$@" -C ./depends/ V=1
 ./autogen.sh
-CC="$CC" CXX="$CXX" ./configure --prefix="${PREFIX}" --host="$HOST" --build="$BUILD" "$RUST_ARG" "$HARDENING_ARG" "$LCOV_ARG" "$TEST_ARG" "$MINING_ARG" "$PROTON_ARG" "$LIBS_ARG" $CONFIGURE_FLAGS --enable-werror CXXFLAGS='-g'
+CC="$CC" CXX="$CXX" ./configure --prefix="${PREFIX}" --host="$HOST" --build="$BUILD" "$HARDENING_ARG" "$LCOV_ARG" "$TEST_ARG" "$MINING_ARG" "$PROTON_ARG" "$LIBS_ARG" $CONFIGURE_FLAGS --enable-werror CXXFLAGS='-g'
 "$MAKE" "$@" V=1