Merge pull request #148 from ZencashOfficial/development

* new -3 transaction type
* added Groth16 specific tests
* Community Fund increase to 20% of block rewards
* adjusted tests for CF increase
* mainnet and testnet checkpoint blocks added
* upgrade OpenSSL to 1.1.0j

.github/ISSUE_TEMPLATE.md

@@ -2,9 +2,9 @@
 
 This issue tracker is only for technical issues related to Zen.
 
-General Zen questions and/or support requests and are best directed to the [Slack](https://zencash.slack.com).
+General Zen questions and/or support requests are best directed to the [Discord](https://horizen.global/invite/discord), or [Support Portal](https://support.horizen.global).
 
-For reporting security vulnerabilities or for sensitive discussions with our security team, please post a message in #developers within the above Slack, or email info@zensystem.io with information.
+For reporting security vulnerabilities or for sensitive discussions with our security team, please see the [Bug Bounty Policy and Scope](https://horizenofficial.atlassian.net/wiki/spaces/ZEN/pages/136871957/Bug+Bounty+Submission+Policy+and+Scope), or send an encrypted email to security@horizen.global with information. The public key for that address is available [here](https://zencashofficial.github.io/keys/).
 
 ### Describe the issue
 Please provide a general summary of the issue you're experiencing

README.md

@@ -1,4 +1,4 @@
-Zen 2.0.15
+Zen 2.0.16
 ==============
 
 What is Horizen?
@@ -8,7 +8,7 @@ A globally accessible and anonymous blockchain for censorship-resistant communic
 Upgrading from 2.0.11 source
 ----------------
 
-To upgrade from any version prior to 2.0.14 you will have to re-clone the repository, the [ZencashOfficial/zen](https://github.com/ZencashOfficial/zen) repository was replaced by a new repository based on Zcash upstream with a different commit history, merging/pulling is not possible without issues.
+To upgrade from any version prior to 2.0.14, you will have to re-clone the repository, the [ZencashOfficial/zen](https://github.com/ZencashOfficial/zen) repository was replaced by a new repository based on Zcash upstream with a different commit history. Merging/pulling is not possible without issues.
 Assuming your current repository is stored at `~/zen`, do the following to upgrade:
 ```{r, engine='bash'}
 # if you don't want to keep the old src around
@@ -20,7 +20,7 @@ cd ~/zen
 ```
 Now continue with building from source.
 
-Installing from source
+Building from source
 ----------------
 
 1. Get dependencies:
@@ -31,12 +31,21 @@ Installing from source
           autoconf libtool ncurses-dev unzip git python \
           zlib1g-dev bsdmainutils automake curl
     ```
-    2. Centos:
+    2. Centos 7:
     ```{r, engine='bash')
-    sudo yum install epel-release
-    sudo yum update
-    sudo yum groupinstall 'Development Tools'
-    sudo yum install git cmake3 curl
+    sudo yum group install 'Development Tools'
+    sudo yum install \
+    autoconf libtool unzip git python \
+    curl automake gcc gcc-c++ patch \
+    glibc-static libstdc++-static
+    ```
+    Please execute the below commands in order.
+    ```{r, engine='bash')
+    sudo yum install centos-release-scl-rh
+    sudo yum install devtoolset-3-gcc devtoolset-3-gcc-c++
+    sudo update-alternatives --install /usr/bin/gcc-4.9 gcc-4.9 /opt/rh/devtoolset-3/root/usr/bin/gcc 10
+    sudo update-alternatives --install /usr/bin/g++-4.9 g++-4.9 /opt/rh/devtoolset-3/root/usr/bin/g++ 10
+    scl enable devtoolset-3 bash
     ```
     3. Windows
     ```{r, engine='bash'}
@@ -53,8 +62,10 @@ Installing from source
         zlib1g-dev curl bsdmainutils automake cmake cargo
     ```
 
-* Install for linux
+* Install for Linux
 ```{r, engine='bash'}
+git clone https://github.com/ZencashOfficial/zen.git
+cd zen
 # Build
 ./zcutil/build.sh -j$(nproc)
 # fetch key
@@ -93,7 +104,7 @@ PATH=$PATH:~/bin
 cd ~/zen/
 ./zcutil/build-arm.sh -j$(nproc)
 ```
-Instructions to redeem pre block 110,000 ZCL
+Instructions to redeem pre-block 110,000 ZCL
 -------------
 1. Linux:
 Copy and paste your wallet.dat from ~/.zclassic/ to ~/.zen. That's it!
@@ -123,7 +134,7 @@ See important security warnings in
 
 Where do I begin?
 -----------------
-* The easiest way to get started is to download one of the available graphical wallets from [horizen.global](https://horizen.global)
+* The easiest way to get started is to download one of the available GUI wallets from [horizen.global](https://horizen.global)
 
 ### Need Help?
 

configure.ac

@@ -2,7 +2,7 @@ dnl require autoconf 2.60 (AS_ECHO/AS_ECHO_N)
 AC_PREREQ([2.60])
 define(_CLIENT_VERSION_MAJOR, 2)
 define(_CLIENT_VERSION_MINOR, 0)
-define(_CLIENT_VERSION_REVISION, 15)
+define(_CLIENT_VERSION_REVISION, 16)
 define(_CLIENT_VERSION_BUILD, 50)
 define(_ZC_BUILD_VAL, m4_if(m4_eval(_CLIENT_VERSION_BUILD < 25), 1, m4_incr(_CLIENT_VERSION_BUILD), m4_eval(_CLIENT_VERSION_BUILD < 50), 1, m4_eval(_CLIENT_VERSION_BUILD - 24), m4_eval(_CLIENT_VERSION_BUILD == 50), 1, , m4_eval(_CLIENT_VERSION_BUILD - 50)))
 define(_CLIENT_VERSION_SUFFIX, m4_if(m4_eval(_CLIENT_VERSION_BUILD < 25), 1, _CLIENT_VERSION_REVISION-beta$1, m4_eval(_CLIENT_VERSION_BUILD < 50), 1, _CLIENT_VERSION_REVISION-rc$1, m4_eval(_CLIENT_VERSION_BUILD == 50), 1, _CLIENT_VERSION_REVISION, _CLIENT_VERSION_REVISION-$1)))
@@ -96,12 +96,6 @@ AC_ARG_ENABLE([mining],
   [enable_mining=$enableval],
   [enable_mining=yes])
 
-AC_ARG_ENABLE([rust],
-  [AS_HELP_STRING([--enable-rust],
-  [enable rust (default is yes)])],
-  [enable_rust=$enableval],
-  [enable_rust=yes])
-
 AC_ARG_ENABLE([proton],
   [AS_HELP_STRING([--disable-proton],
   [disable Proton (AMQP messaging)])],
@@ -113,6 +107,18 @@ AC_ARG_ENABLE(tests,
     [use_tests=$enableval],
     [use_tests=yes])
 
+AC_ARG_ENABLE([asan],
+  [AS_HELP_STRING([--enable-asan],
+  [instrument the executables with asan (default is no)])],
+  [use_asan=$enableval],
+  [use_asan=no])
+
+AC_ARG_ENABLE([tsan],
+  [AS_HELP_STRING([--enable-tsan],
+  [instrument the executables with tsan (default is no)])],
+  [use_tsan=$enableval],
+  [use_tsan=no])
+
 AC_ARG_ENABLE([hardening],
   [AS_HELP_STRING([--enable-hardening],
   [attempt to harden the resulting executables (default is yes)])],
@@ -218,9 +224,9 @@ AC_ARG_WITH([utils],
 
 AC_ARG_WITH([libs],
   [AS_HELP_STRING([--with-libs],
-  [build libraries (default=yes)])],
+  [build libraries (default=no)])],
   [build_bitcoin_libs=$withval],
-  [build_bitcoin_libs=yes])
+  [build_bitcoin_libs=no])
 
 AC_ARG_WITH([daemon],
   [AS_HELP_STRING([--with-daemon],
@@ -441,6 +447,29 @@ if test x$TARGET_OS != xwindows; then
   AX_CHECK_COMPILE_FLAG([-fPIC],[PIC_FLAGS="-fPIC"])
 fi
 
+#asan and tsan cannot be used together
+if test x$use_asan$use_tsan == xyesyes; then
+  AC_MSG_ERROR(asan and tsan cannot be simultaneously enabled)
+fi
+
+# using asan flag to enable address sanitizer and undefined behavior sanitizer
+if test x$use_asan == xyes; then
+  AX_CHECK_LINK_FLAG([-static-libstdc++],[SAN_LDFLAGS="$SAN_LDFLAGS -static-libstdc++"],[AC_MSG_ERROR(Cannot statically link -static-libstdc++)])
+  AX_CHECK_LINK_FLAG([-static-libasan],[SAN_LDFLAGS="$SAN_LDFLAGS -static-libasan"],[AC_MSG_ERROR(Cannot statically link -static-libasan)])
+  AX_CHECK_COMPILE_FLAG([-fsanitize=address],[SAN_CXXFLAGS="$SAN_CXXFLAGS -fsanitize=address"],[AC_MSG_ERROR(Cannot enable -fsanitize=address)])
+  AX_CHECK_COMPILE_FLAG([-fsanitize=undefined],[SAN_CXXFLAGS="$SAN_CXXFLAGS -fsanitize=undefined"],[AC_MSG_ERROR(Cannot enable -fsanitize=undefined)])
+  AX_CHECK_COMPILE_FLAG([-fno-omit-frame-pointer],[SAN_CXXFLAGS="$SAN_CXXFLAGS -fno-omit-frame-pointer"],[AC_MSG_ERROR(Cannot enable -fno-omit-frame-pointer)])
+fi
+
+# using tsan flag to enable address thread sanitizer
+# TSAN is supported on Linux x84_64 and tested on Ubuntu 12.04
+# Non-position-independent executables are not supported.  Use with -fPIE and -pie flags
+# libc/libstdc++ static linking is not supported
+if test x$use_tsan == xyes; then
+  AX_CHECK_COMPILE_FLAG([-fsanitize=thread],[SAN_CXXFLAGS="$SAN_CXXFLAGS -fsanitize=thread"],[AC_MSG_ERROR(Cannot enable -fsanitize=thread)])
+  AX_CHECK_COMPILE_FLAG([-fno-omit-frame-pointer],[SAN_CXXFLAGS="$SAN_CXXFLAGS -fno-omit-frame-pointer"],[AC_MSG_ERROR(Cannot enable -fno-omit-frame-pointer)])
+fi
+
 if test x$use_hardening != xno; then
   AX_CHECK_COMPILE_FLAG([-Wformat],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wformat"],[AC_MSG_ERROR(Cannot enable -Wformat)])
   AX_CHECK_COMPILE_FLAG([-Wformat-security],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wformat-security"],[AC_MSG_ERROR(Cannot enable -Wformat-security)],[-Wformat])
@@ -453,23 +482,25 @@ if test x$use_hardening != xno; then
     ],[AC_MSG_ERROR(Cannot enable -U_FORTIFY_SOURCE)])
     HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -D_FORTIFY_SOURCE=2"
   ],[AC_MSG_ERROR(Cannot enable -D_FORTIFY_SOURCE=2)])
-  # AX_CHECK_LINK_FLAG([[-Wl,-z,relro]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,relro"],[AC_MSG_ERROR(Cannot enable RELRO)])
-  # AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"],[AC_MSG_ERROR(Cannot enable BIND_NOW)])
 
-  if test x$BUILD_OS != xdarwin; then
-    AX_CHECK_LINK_FLAG([[-Wl,-z,relro]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,relro"],[AC_MSG_ERROR(Cannot enable RELRO)])
-    AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"],[AC_MSG_ERROR(Cannot enable BIND_NOW)])
-  else
+  if test x$BUILD_OS = xdarwin || test x$TARGET_OS = xwindows; then
+    # Xcode's ld (at least ld64-302.3) doesn't support -z
+    # mingw-w64's ld (at least mingw-w64 4.0.4-2) also appears to not support -z
     AX_CHECK_LINK_FLAG([[-Wl,-z,relro]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,relro"],[AC_MSG_WARN(Cannot enable RELRO)])
     AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"],[AC_MSG_WARN(Cannot enable BIND_NOW)])
+  else
+    AX_CHECK_LINK_FLAG([[-Wl,-z,relro]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,relro"],[AC_MSG_ERROR(Cannot enable RELRO)])
+    AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"],[AC_MSG_ERROR(Cannot enable BIND_NOW)])
   fi
 
 
   if test x$TARGET_OS != xwindows; then
     # All windows code is PIC, forcing it on just adds useless compile warnings
     AX_CHECK_COMPILE_FLAG([-fPIE],[PIE_FLAGS="-fPIE"],[AC_MSG_ERROR(Cannot enable -fPIE)])
-    if test x$BUILD_OS != xdarwin; then
-      AX_CHECK_LINK_FLAG([[-pie]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -pie"],[AC_MSG_WARN(Cannot enable -pie)])
+    if test x$BUILD_OS = xdarwin; then
+      AX_CHECK_LINK_FLAG([[-Wl,-pie]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-pie"],[AC_MSG_ERROR(Cannot enable -Wl,-pie)])
+    else
+      AX_CHECK_LINK_FLAG([[-pie]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -pie"],[AC_MSG_ERROR(Cannot enable -pie)])
     fi
   else
     # These are only available on Windows.
@@ -703,15 +734,20 @@ 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"
+case $host in
+  *mingw*)
+    ;;
+  *)
+    RUST_LIBS="$RUST_LIBS -ldl"
+    ;;
+esac
 
 dnl Check for OpenMP support
 AX_OPENMP(
   [AC_DEFINE(HAVE_OPENMP, 1, [Define if OpenMP is enabled])
    AM_CONDITIONAL([HAVE_OPENMP], [true])
+   CPPFLAGS="$CPPFLAGS -DMULTICORE"
    CXXFLAGS="$CXXFLAGS $OPENMP_CXXFLAGS"],
   [AC_MSG_WARN([OpenMP not supported, disabling multithreading])
    AC_DEFINE(HAVE_OPENMP, 0, [Define if OpenMP is enabled])
@@ -745,7 +781,7 @@ if test x$BUILD_OS = xdarwin; then
 fi
 
 
-LIBZCASH_LIBS="-lgmp -lgmpxx -lboost_system-mt -lcrypto -lsodium $RUST_LIBS"
+LIBZCASH_LIBS="-lgmp -lgmpxx -lboost_system -lcrypto -lsodium $RUST_LIBS"
 
 AC_MSG_CHECKING([whether to build bitcoind])
 AM_CONDITIONAL([BUILD_BITCOIND], [test x$build_bitcoind = xyes])
@@ -805,16 +841,6 @@ 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$use_proton" = "xyes"])
@@ -844,11 +870,12 @@ AM_CONDITIONAL([BUILD_DARWIN], [test x$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$use_glibc_compat = xyes])
 AM_CONDITIONAL([HARDEN],[test x$use_hardening = xyes])
+AM_CONDITIONAL([ASAN],[test x$use_asan = xyes])
+AM_CONDITIONAL([TSAN],[test x$use_tsan = xyes])
 
 AC_DEFINE(CLIENT_VERSION_MAJOR, _CLIENT_VERSION_MAJOR, [Major version])
 AC_DEFINE(CLIENT_VERSION_MINOR, _CLIENT_VERSION_MINOR, [Minor version])
@@ -868,6 +895,8 @@ AC_SUBST(BITCOIN_TX_NAME)
 
 AC_SUBST(RELDFLAGS)
 AC_SUBST(ERROR_CXXFLAGS)
+AC_SUBST(SAN_CXXFLAGS)
+AC_SUBST(SAN_LDFLAGS)
 AC_SUBST(HARDENED_CXXFLAGS)
 AC_SUBST(HARDENED_CPPFLAGS)
 AC_SUBST(HARDENED_LDFLAGS)
@@ -933,7 +962,6 @@ 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

@@ -5,7 +5,7 @@ BASE_CACHE ?= $(BASEDIR)/built
 SDK_PATH ?= $(BASEDIR)/SDKs
 NO_WALLET ?=
 NO_UPNP ?=
-PRIORITY_DOWNLOAD_PATH ?= https://horizen.global/depends-sources
+PRIORITY_DOWNLOAD_PATH ?= https://downloads.horizen.global/file/depends-sources
 
 BUILD ?= $(shell ./config.guess)
 HOST ?= $(BUILD)
@@ -14,6 +14,7 @@ BASEDIR = $(CURDIR)
 HASH_LENGTH:=11
 DOWNLOAD_CONNECT_TIMEOUT:=10
 DOWNLOAD_RETRIES:=3
+CRATE_REGISTRY:=vendored-sources
 
 host:=$(BUILD)
 ifneq ($(HOST),)
@@ -72,15 +73,14 @@ 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)
 
-meta_depends = Makefile funcs.mk builders/default.mk hosts/default.mk hosts/$(host_os).mk builders/$(build_os).mk
+meta_depends = Makefile funcs.mk builders/default.mk hosts/default.mk hosts/$(host_os).mk builders/$(build_os).mk cargo-checksum.sh
 
 $(host_arch)_$(host_os)_native_toolchain?=$($(host_os)_native_toolchain)
 

depends/cargo-checksum.sh

@@ -0,0 +1,13 @@
+echo "{\"files\":{$(
+find . -type f |  	# Get list of file paths
+grep -v $1 |		# Exclude Makefile hashes
+grep -v '[.]stamp_' |	# Exclude Makefile stamps
+sed 's|^[.]/||' |	# Remove leading ./
+sort |			# Sort (for uniformity)
+xargs $2 |		# Get SHA256 hashes (assumes standard 'H(A) A' format)
+awk -v OFS='":"' '{print $2, $1}' |	#   'H(A) A'  ->  'A":"H(A)'
+sed 's|^|"|' |				#  'A":"H(A)' -> '"A":"H(A)'
+sed 's|$|"|' |				# '"A":"H(A)' -> '"A":"H(A)"'
+tr '\n' ',' |		# Concatenate lines with commas
+sed 's|,$||'		# Remove any trailing comma (to fit JSON spec)
+)},\"package\":$3}" > .cargo-checksum.json

depends/funcs.mk

@@ -30,6 +30,21 @@ define fetch_file
     rm -rf $$($(1)_download_dir) ))
 endef
 
+define generate_crate_checksum
+$(BASEDIR)/cargo-checksum.sh "$($(1)_file_name)" "$(build_SHA256SUM)" "\"$($(1)_sha256_hash)\""
+endef
+
+define generate_unpackaged_crate_checksum
+$(BASEDIR)/cargo-checksum.sh "$($(1)_file_name)" "$(build_SHA256SUM)" "null"
+endef
+
+define vendor_crate_source
+mkdir -p $($(1)_staging_prefix_dir)/$(CRATE_REGISTRY) && \
+cp -r $($(1)_extract_dir) $($(1)_staging_prefix_dir)/$(CRATE_REGISTRY)/$($(1)_crate_name) && \
+cd $($(1)_staging_prefix_dir)/$(CRATE_REGISTRY)/$($(1)_crate_versioned_name) && \
+rm -r `basename $($(1)_patch_dir)` .stamp_* .$($(1)_file_name).hash
+endef
+
 define int_get_build_recipe_hash
 $(eval $(1)_all_file_checksums:=$(shell $(build_SHA256SUM) $(meta_depends) packages/$(1).mk $(addprefix $(PATCHES_PATH)/$(1)/,$($(1)_patches)) | cut -d" " -f1))
 $(eval $(1)_recipe_hash:=$(shell echo -n "$($(1)_all_file_checksums)" | $(build_SHA256SUM) | cut -d" " -f1))

depends/packages/bdb.mk

@@ -1,6 +1,6 @@
 package=bdb
 $(package)_version=6.2.23
-$(package)_download_path=http://download.oracle.com/berkeley-db
+$(package)_download_path=https://download.oracle.com/berkeley-db
 $(package)_file_name=db-$($(package)_version).tar.gz
 $(package)_sha256_hash=47612c8991aa9ac2f6be721267c8d3cdccf5ac83105df8e50809daea24e95dc7
 $(package)_build_subdir=build_unix
@@ -13,6 +13,7 @@ $(package)_cxxflags=-std=c++11
 endef
 
 define $(package)_preprocess_cmds
+  sed -i.old 's/WinIoCtl.h/winioctl.h/g' src/dbinc/win_db.h && \
   sed -i.old 's/__atomic_compare_exchange\\(/__atomic_compare_exchange_db(/' src/dbinc/atomic.h && \
   sed -i.old 's/atomic_init/atomic_init_db/' src/dbinc/atomic.h src/mp/mp_region.c src/mp/mp_mvcc.c src/mp/mp_fget.c src/mutex/mut_method.c src/mutex/mut_tas.c
 endef