From 9abff4af4f07c16aecd89bf82051afbc3228d6fd Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Tue, 29 Jan 2019 21:01:24 -0500
Subject: [PATCH 01/12] wasm: init cross target
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Adds pkgsCross.wasm32 and pkgsCross.wasm64. Use it to build Nixpkgs
with a WebAssembly toolchain.

stdenv/cross: use static overlay on isWasm

isWasm doesn’t make sense dynamically linked.
---
 lib/systems/default.nix                       |  3 +-
 lib/systems/doubles.nix                       |  3 ++
 lib/systems/examples.nix                      | 14 ++++++++--
 lib/systems/for-meta.nix                      |  1 +
 lib/systems/inspect.nix                       |  3 +-
 lib/systems/parse.nix                         |  4 +++
 .../bintools-wrapper/default.nix              |  3 +-
 pkgs/build-support/cc-wrapper/default.nix     |  6 ++++
 .../compilers/llvm/8/compiler-rt.nix          |  4 +++
 pkgs/development/compilers/llvm/8/default.nix |  2 ++
 .../compilers/llvm/8/libc++/default.nix       | 11 ++++++--
 .../compilers/llvm/8/libc++abi.nix            | 17 ++++++++---
 .../llvm/8/libcxxabi-no-threads.patch         | 12 ++++++++
 .../libraries/wasilibc/default.nix            | 28 +++++++++++++++++++
 pkgs/stdenv/cross/default.nix                 |  3 +-
 pkgs/stdenv/generic/default.nix               |  3 ++
 pkgs/test/cross/default.nix                   |  9 +++---
 pkgs/top-level/all-packages.nix               |  7 ++++-
 pkgs/top-level/static.nix                     | 12 ++++++++
 19 files changed, 126 insertions(+), 19 deletions(-)
 create mode 100644 pkgs/development/compilers/llvm/8/libcxxabi-no-threads.patch
 create mode 100644 pkgs/development/libraries/wasilibc/default.nix

diff --git a/lib/systems/default.nix b/lib/systems/default.nix
index b45a5fd8d2ba..c408fe46be6f 100644
--- a/lib/systems/default.nix
+++ b/lib/systems/default.nix
@@ -30,6 +30,7 @@ rec {
       libc =
         /**/ if final.isDarwin              then "libSystem"
         else if final.isMinGW               then "msvcrt"
+        else if final.isWasi                then "wasilibc"
         else if final.isMusl                then "musl"
         else if final.isUClibc              then "uclibc"
         else if final.isAndroid             then "bionic"
@@ -62,7 +63,7 @@ rec {
           "netbsd" = "NetBSD";
           "freebsd" = "FreeBSD";
           "openbsd" = "OpenBSD";
-          "wasm" = "Wasm";
+          "wasi" = "Wasi";
         }.${final.parsed.kernel.name} or null;
 
          # uname -p
diff --git a/lib/systems/doubles.nix b/lib/systems/doubles.nix
index 2cf06b6ac1c8..c6877ebef0bc 100644
--- a/lib/systems/doubles.nix
+++ b/lib/systems/doubles.nix
@@ -17,6 +17,8 @@ let
     "x86_64-netbsd" "x86_64-openbsd" "x86_64-solaris"
 
     "x86_64-windows" "i686-windows"
+
+    "wasm64-wasi" "wasm32-wasi"
   ];
 
   allParsed = map parse.mkSystemFromString all;
@@ -45,6 +47,7 @@ in rec {
   netbsd  = filterDoubles predicates.isNetBSD;
   openbsd = filterDoubles predicates.isOpenBSD;
   unix    = filterDoubles predicates.isUnix;
+  wasi    = filterDoubles predicates.isWasi;
   windows = filterDoubles predicates.isWindows;
 
   mesaPlatforms = ["i686-linux" "x86_64-linux" "x86_64-darwin" "armv5tel-linux" "armv6l-linux" "armv7l-linux" "armv7a-linux" "aarch64-linux" "powerpc64le-linux"];
diff --git a/lib/systems/examples.nix b/lib/systems/examples.nix
index 1a5b80449bf2..94c7cfd7570f 100644
--- a/lib/systems/examples.nix
+++ b/lib/systems/examples.nix
@@ -116,7 +116,7 @@ rec {
     config = "aarch64-none-elf";
     libc = "newlib";
   };
-  
+
   aarch64be-embedded = {
     config = "aarch64_be-none-elf";
     libc = "newlib";
@@ -126,7 +126,7 @@ rec {
     config = "powerpc-none-eabi";
     libc = "newlib";
   };
-  
+
   ppcle-embedded = {
     config = "powerpcle-none-eabi";
     libc = "newlib";
@@ -211,4 +211,14 @@ rec {
     config = "x86_64-unknown-netbsd";
     libc = "nblibc";
   };
+
+  #
+  # WASM
+  #
+
+  wasi32 = {
+    config = "wasm32-unknown-wasi";
+    useLLVM = true;
+  };
+
 }
diff --git a/lib/systems/for-meta.nix b/lib/systems/for-meta.nix
index 51fb6ae760d1..17ae94deb7d1 100644
--- a/lib/systems/for-meta.nix
+++ b/lib/systems/for-meta.nix
@@ -32,6 +32,7 @@ in rec {
   openbsd = [ patterns.isOpenBSD ];
   unix    = patterns.isUnix; # Actually a list
   windows = [ patterns.isWindows ];
+  wasi    = [ patterns.isWasi ];
 
   inherit (lib.systems.doubles) mesaPlatforms;
 }
diff --git a/lib/systems/inspect.nix b/lib/systems/inspect.nix
index f8d5ca84d7aa..b88af55e46be 100644
--- a/lib/systems/inspect.nix
+++ b/lib/systems/inspect.nix
@@ -43,9 +43,10 @@ rec {
     isWindows      = { kernel = kernels.windows; };
     isCygwin       = { kernel = kernels.windows; abi = abis.cygnus; };
     isMinGW        = { kernel = kernels.windows; abi = abis.gnu; };
+    isWasi         = { kernel = kernels.wasi; };
 
     isAndroid      = [ { abi = abis.android; } { abi = abis.androideabi; } ];
-    isMusl         = with abis; map (a: { abi = a; }) [ musl musleabi musleabihf ];
+    isMusl         = (with abis; map (a: { abi = a; }) [ musl musleabi musleabihf ]) ++ [{ kernel = kernels.wasi; }];
     isUClibc       = with abis; map (a: { abi = a; }) [ uclibc uclibceabi uclibceabihf ];
 
     isEfi          = map (family: { cpu.family = family; })
diff --git a/lib/systems/parse.nix b/lib/systems/parse.nix
index 3e23a721f0d9..522a3bf71aff 100644
--- a/lib/systems/parse.nix
+++ b/lib/systems/parse.nix
@@ -226,6 +226,7 @@ rec {
     elf = {};
     macho = {};
     pe = {};
+    wasm = {};
 
     unknown = {};
   };
@@ -268,6 +269,7 @@ rec {
     none    = { execFormat = unknown; families = { }; };
     openbsd = { execFormat = elf;     families = { inherit bsd; }; };
     solaris = { execFormat = elf;     families = { }; };
+    wasi    = { execFormat = wasm;    families = { }; };
     windows = { execFormat = pe;      families = { }; };
   } // { # aliases
     # 'darwin' is the kernel for all of them. We choose macOS by default.
@@ -376,6 +378,8 @@ rec {
         then { cpu = elemAt l 0;                      kernel = elemAt l 1; abi = elemAt l 2; }
       else if (elemAt l 2 == "mingw32") # autotools breaks on -gnu for window
         then { cpu = elemAt l 0; vendor = elemAt l 1; kernel = "windows";                    }
+      else if (elemAt l 2 == "wasi")
+        then { cpu = elemAt l 0; vendor = elemAt l 1; kernel = "wasi";                       }
       else if hasPrefix "netbsd" (elemAt l 2)
         then { cpu = elemAt l 0; vendor = elemAt l 1;    kernel = elemAt l 2;                }
       else if (elem (elemAt l 2) ["eabi" "eabihf" "elf"])
diff --git a/pkgs/build-support/bintools-wrapper/default.nix b/pkgs/build-support/bintools-wrapper/default.nix
index 964ff1175538..e1ec09bc95a1 100644
--- a/pkgs/build-support/bintools-wrapper/default.nix
+++ b/pkgs/build-support/bintools-wrapper/default.nix
@@ -191,7 +191,8 @@ stdenv.mkDerivation {
       else if targetPlatform.isAvr then "avr"
       else if targetPlatform.isAlpha then "alpha"
       else throw "unknown emulation for platform: ${targetPlatform.config}";
-    in targetPlatform.platform.bfdEmulation or (fmt + sep + arch);
+    in if targetPlatform.useLLVM or false then ""
+       else targetPlatform.platform.bfdEmulation or (fmt + sep + arch);
 
   strictDeps = true;
   depsTargetTargetPropagated = extraPackages;
diff --git a/pkgs/build-support/cc-wrapper/default.nix b/pkgs/build-support/cc-wrapper/default.nix
index 9569c6e78c8a..ddec3d0931ff 100644
--- a/pkgs/build-support/cc-wrapper/default.nix
+++ b/pkgs/build-support/cc-wrapper/default.nix
@@ -299,6 +299,12 @@ stdenv.mkDerivation {
       hardening_unsupported_flags+=" stackprotector fortify pie pic"
     ''
 
+    + optionalString targetPlatform.isWasm ''
+      hardening_unsupported_flags+=" stackprotector fortify pie pic"
+    '' + optionalString (targetPlatform.isWasm && libc != null) ''
+      echo "--allow-undefined-file=${libc}/share/wasm32-wasi/undefined-symbols.txt" >> $out/nix-support/cc-ldflags
+    ''
+
     + optionalString (libc != null && targetPlatform.isAvr) ''
       for isa in avr5 avr3 avr4 avr6 avr25 avr31 avr35 avr51 avrxmega2 avrxmega4 avrxmega5 avrxmega6 avrxmega7 tiny-stack; do
         echo "-B${getLib libc}/avr/lib/$isa" >> $out/nix-support/libc-cflags
diff --git a/pkgs/development/compilers/llvm/8/compiler-rt.nix b/pkgs/development/compilers/llvm/8/compiler-rt.nix
index 47c8b7bd59f5..3e225626aa6d 100644
--- a/pkgs/development/compilers/llvm/8/compiler-rt.nix
+++ b/pkgs/development/compilers/llvm/8/compiler-rt.nix
@@ -60,7 +60,11 @@ stdenv.mkDerivation rec {
     ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/crtend.o
     ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/crtbeginS.o
     ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
+  '' + stdenv.lib.optionalString stdenv.hostPlatform.isWasm ''
+    ln -s $out/lib/*/* $out/lib
   '';
 
+  NIX_LDFLAGS = stdenv.lib.optionalString stdenv.hostPlatform.isWasm "--allow-undefined --no-entry";
+
   enableParallelBuilding = true;
 }
diff --git a/pkgs/development/compilers/llvm/8/default.nix b/pkgs/development/compilers/llvm/8/default.nix
index 3503e6b83d2e..c528f8417cfa 100644
--- a/pkgs/development/compilers/llvm/8/default.nix
+++ b/pkgs/development/compilers/llvm/8/default.nix
@@ -97,12 +97,14 @@ let
         targetLlvmLibraries.libcxx
         targetLlvmLibraries.libcxxabi
         targetLlvmLibraries.compiler-rt
+      ] ++ stdenv.lib.optionals (!stdenv.targetPlatform.isWasm) [
         targetLlvmLibraries.libunwind
       ];
       extraBuildCommands = ''
         echo "-target ${stdenv.targetPlatform.config}" >> $out/nix-support/cc-cflags
         echo "-rtlib=compiler-rt -Wno-unused-command-line-argument" >> $out/nix-support/cc-cflags
         echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
+      '' + stdenv.lib.optionalString (!stdenv.targetPlatform.isWasm) ''
         echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands cc;
     };
diff --git a/pkgs/development/compilers/llvm/8/libc++/default.nix b/pkgs/development/compilers/llvm/8/libc++/default.nix
index d0a5c37c4148..8b4452a6de29 100644
--- a/pkgs/development/compilers/llvm/8/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/8/libc++/default.nix
@@ -1,4 +1,5 @@
-{ lib, stdenv, fetch, cmake, python, libcxxabi, fixDarwinDylibNames, version }:
+{ lib, stdenv, fetch, cmake, python, libcxxabi, fixDarwinDylibNames, version
+, enableShared ? true }:
 
 stdenv.mkDerivation rec {
   name = "libc++-${version}";
@@ -31,7 +32,11 @@ stdenv.mkDerivation rec {
     "-DLIBCXX_LIBCPPABI_VERSION=2"
     "-DLIBCXX_CXX_ABI=libcxxabi"
   ] ++ stdenv.lib.optional stdenv.hostPlatform.isMusl "-DLIBCXX_HAS_MUSL_LIBC=1"
-    ++ stdenv.lib.optional (stdenv.hostPlatform.useLLVM or false) "-DLIBCXX_USE_COMPILER_RT=ON";
+    ++ stdenv.lib.optional (stdenv.hostPlatform.useLLVM or false) "-DLIBCXX_USE_COMPILER_RT=ON"
+    ++ stdenv.lib.optional stdenv.hostPlatform.isWasm [
+      "-DLIBCXX_ENABLE_THREADS=OFF"
+      "-DLIBCXX_ENABLE_FILESYSTEM=OFF"
+    ] ++ stdenv.lib.optional (!enableShared) "-DLIBCXX_ENABLE_SHARED=OFF";
 
   enableParallelBuilding = true;
 
@@ -46,6 +51,6 @@ stdenv.mkDerivation rec {
     homepage = http://libcxx.llvm.org/;
     description = "A new implementation of the C++ standard library, targeting C++11";
     license = with stdenv.lib.licenses; [ ncsa mit ];
-    platforms = stdenv.lib.platforms.unix;
+    platforms = stdenv.lib.platforms.all;
   };
 }
diff --git a/pkgs/development/compilers/llvm/8/libc++abi.nix b/pkgs/development/compilers/llvm/8/libc++abi.nix
index 0eb5ebca5159..e264a3849414 100644
--- a/pkgs/development/compilers/llvm/8/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/8/libc++abi.nix
@@ -1,4 +1,5 @@
-{ stdenv, cmake, fetch, libcxx, libunwind, llvm, version }:
+{ stdenv, cmake, fetch, libcxx, libunwind, llvm, version
+, enableShared ? true }:
 
 stdenv.mkDerivation {
   name = "libc++abi-${version}";
@@ -6,13 +7,20 @@ stdenv.mkDerivation {
   src = fetch "libcxxabi" "1k875f977ybdkpdnr9105wa6hccy9qvpd9xd42n75h7p56bdxmn2";
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = stdenv.lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD) libunwind;
+  buildInputs = stdenv.lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD && !stdenv.hostPlatform.isWasm) libunwind;
 
   cmakeFlags = stdenv.lib.optionals (stdenv.hostPlatform.useLLVM or false) [
     "-DLLVM_ENABLE_LIBCXX=ON"
     "-DLIBCXXABI_USE_LLVM_UNWINDER=ON"
+  ] ++ stdenv.lib.optionals stdenv.hostPlatform.isWasm [
+    "-DUNIX=ON"
+    "-DLIBCXXABI_ENABLE_THREADS=OFF"
+  ] ++ stdenv.lib.optionals (!enableShared) [
+    "-DLIBCXXABI_ENABLE_SHARED=OFF"
   ];
 
+  patches = [ ./libcxxabi-no-threads.patch ];
+
   postUnpack = ''
     unpackFile ${libcxx.src}
     unpackFile ${llvm.src}
@@ -39,8 +47,9 @@ stdenv.mkDerivation {
     else ''
       install -d -m 755 $out/include $out/lib
       install -m 644 lib/libc++abi.a $out/lib
-      install -m 644 lib/libc++abi.so.1.0 $out/lib
       install -m 644 ../include/cxxabi.h $out/include
+    '' + stdenv.lib.optionalString enableShared ''
+      install -m 644 lib/libc++abi.so.1.0 $out/lib
       ln -s libc++abi.so.1.0 $out/lib/libc++abi.so
       ln -s libc++abi.so.1.0 $out/lib/libc++abi.so.1
     '';
@@ -50,6 +59,6 @@ stdenv.mkDerivation {
     description = "A new implementation of low level support for a standard C++ library";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     maintainers = with stdenv.lib.maintainers; [ vlstill ];
-    platforms = stdenv.lib.platforms.unix;
+    platforms = stdenv.lib.platforms.all;
   };
 }
diff --git a/pkgs/development/compilers/llvm/8/libcxxabi-no-threads.patch b/pkgs/development/compilers/llvm/8/libcxxabi-no-threads.patch
new file mode 100644
index 000000000000..787f3e16500e
--- /dev/null
+++ b/pkgs/development/compilers/llvm/8/libcxxabi-no-threads.patch
@@ -0,0 +1,12 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 4138acf..41b4763 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -362,6 +362,7 @@ if (NOT LIBCXXABI_ENABLE_THREADS)
+                         " is also set to ON.")
+   endif()
+   add_definitions(-D_LIBCXXABI_HAS_NO_THREADS)
++  add_definitions(-D_LIBCPP_HAS_NO_THREADS)
+ endif()
+ 
+ if (LIBCXXABI_HAS_EXTERNAL_THREAD_API)
diff --git a/pkgs/development/libraries/wasilibc/default.nix b/pkgs/development/libraries/wasilibc/default.nix
new file mode 100644
index 000000000000..f783540797ce
--- /dev/null
+++ b/pkgs/development/libraries/wasilibc/default.nix
@@ -0,0 +1,28 @@
+{ stdenv, fetchFromGitHub, lib }:
+
+stdenv.mkDerivation {
+  name = "wasilibc-20190413";
+  src = fetchFromGitHub {
+    owner = "CraneStation";
+    repo = "wasi-sysroot";
+    rev = "079d7bda78bc0ad8f69c1594444b54786545ce57";
+    sha256 = "09s906bc9485wzkgibnpfh0mii7jkldzr1a6g8k7ch0si8rshi5r";
+  };
+  makeFlags = [
+    "WASM_CC=${stdenv.cc.targetPrefix}cc"
+    "WASM_NM=${stdenv.cc.targetPrefix}nm"
+    "WASM_AR=${stdenv.cc.targetPrefix}ar"
+    "INSTALL_DIR=${placeholder "out"}"
+  ];
+
+  postInstall = ''
+    mv $out/lib/*/* $out/lib
+  '';
+
+  meta = {
+    description = "WASI libc implementation for WebAssembly";
+    homepage    = "https://wasi.dev";
+    platforms   = lib.platforms.wasi;
+    maintainers = [ lib.maintainers.matthewbauer ];
+  };
+}
diff --git a/pkgs/stdenv/cross/default.nix b/pkgs/stdenv/cross/default.nix
index fc9a585cf4d6..479213f3a561 100644
--- a/pkgs/stdenv/cross/default.nix
+++ b/pkgs/stdenv/cross/default.nix
@@ -37,7 +37,8 @@ in lib.init bootStages ++ [
   # Run Packages
   (buildPackages: {
     inherit config;
-    overlays = overlays ++ crossOverlays;
+    overlays = overlays ++ crossOverlays
+      ++ (if crossSystem.isWasm then [(import ../../top-level/static.nix)] else []);
     selfBuild = false;
     stdenv = buildPackages.stdenv.override (old: rec {
       buildPlatform = localSystem;
diff --git a/pkgs/stdenv/generic/default.nix b/pkgs/stdenv/generic/default.nix
index 04117de32693..ed022422c26e 100644
--- a/pkgs/stdenv/generic/default.nix
+++ b/pkgs/stdenv/generic/default.nix
@@ -91,6 +91,9 @@ let
       '' + lib.optionalString hostPlatform.isDarwin ''
         export NIX_DONT_SET_RPATH=1
         export NIX_NO_SELF_RPATH=1
+      '' + lib.optionalString (hostPlatform.parsed.kernel.execFormat != lib.systems.parse.execFormats.elf && hostPlatform.parsed.kernel.execFormat != lib.systems.parse.execFormats.macho) ''
+        export NIX_DONT_SET_RPATH=1
+        export NIX_NO_SELF_RPATH=1
       ''
       # TODO this should be uncommented, but it causes stupid mass rebuilds. I
       # think the best solution would just be to fixup linux RPATHs so we don't
diff --git a/pkgs/test/cross/default.nix b/pkgs/test/cross/default.nix
index 5d9c120c501a..6c31a16f2fd5 100644
--- a/pkgs/test/cross/default.nix
+++ b/pkgs/test/cross/default.nix
@@ -93,8 +93,7 @@ let
 
   };
 
-in (lib.mapAttrs (_: mapMultiPlatformTest builtins.id) tests)
-// (lib.mapAttrs' (name: test: {
-    name = "${name}-llvm";
-    value = mapMultiPlatformTest (system: system // {useLLVM = true;}) test;
-  }) tests)
+in {
+  gcc = (lib.mapAttrs (_: mapMultiPlatformTest (system: system // {useLLVM = false;})) tests);
+  llvm = (lib.mapAttrs (_: mapMultiPlatformTest (system: system // {useLLVM = true;})) tests);
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 13bc8ebfaf04..c07533522a8d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -10311,10 +10311,15 @@ in
     else if stdenv.targetPlatform.useiOSPrebuilt then targetPackages.darwin.iosSdkPkgs.libraries or darwin.iosSdkPkgs.libraries
     else if name == "libSystem" then targetPackages.darwin.xcode
     else if name == "nblibc" then targetPackages.netbsdCross.libc
-    else throw "Unknown libc";
+    else if name == "wasilibc" then targetPackages.wasilibc
+    else throw "Unknown libc ${name}";
 
   libcCross = assert stdenv.targetPlatform != stdenv.buildPlatform; libcCrossChooser stdenv.targetPlatform.libc;
 
+  wasilibc = callPackages ../development/libraries/wasilibc {
+    stdenv = crossLibcStdenv;
+  };
+
   # Only supported on Linux, using glibc
   glibcLocales = if stdenv.hostPlatform.libc == "glibc" then callPackage ../development/libraries/glibc/locales.nix { } else null;
 
diff --git a/pkgs/top-level/static.nix b/pkgs/top-level/static.nix
index fe9c04de04cd..dea30fe7b595 100644
--- a/pkgs/top-level/static.nix
+++ b/pkgs/top-level/static.nix
@@ -148,4 +148,16 @@ in {
     };
   };
 
+  llvmPackages_8 = super.llvmPackages_8 // {
+    libraries = super.llvmPackages_8.libraries // rec {
+      libcxxabi = super.llvmPackages_8.libraries.libcxxabi.override {
+        enableShared = false;
+      };
+      libcxx = super.llvmPackages_8.libraries.libcxx.override {
+        enableShared = false;
+        inherit libcxxabi;
+      };
+    };
+  };
+
 }

From d591a109beee6512ea45e03e83901d269c8ec39b Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Mon, 15 Apr 2019 21:10:42 -0400
Subject: [PATCH 02/12] =?UTF-8?q?wasm:=20don=E2=80=99t=20assume=20musl?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 lib/systems/inspect.nix                              | 2 +-
 pkgs/development/compilers/llvm/8/libc++/default.nix | 6 ++++--
 pkgs/development/compilers/llvm/8/libc++abi.nix      | 1 +
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/systems/inspect.nix b/lib/systems/inspect.nix
index b88af55e46be..1c90af88879a 100644
--- a/lib/systems/inspect.nix
+++ b/lib/systems/inspect.nix
@@ -46,7 +46,7 @@ rec {
     isWasi         = { kernel = kernels.wasi; };
 
     isAndroid      = [ { abi = abis.android; } { abi = abis.androideabi; } ];
-    isMusl         = (with abis; map (a: { abi = a; }) [ musl musleabi musleabihf ]) ++ [{ kernel = kernels.wasi; }];
+    isMusl         = with abis; map (a: { abi = a; }) [ musl musleabi musleabihf ];
     isUClibc       = with abis; map (a: { abi = a; }) [ uclibc uclibceabi uclibceabihf ];
 
     isEfi          = map (family: { cpu.family = family; })
diff --git a/pkgs/development/compilers/llvm/8/libc++/default.nix b/pkgs/development/compilers/llvm/8/libc++/default.nix
index 8b4452a6de29..3d67c37dcdd7 100644
--- a/pkgs/development/compilers/llvm/8/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/8/libc++/default.nix
@@ -23,7 +23,8 @@ stdenv.mkDerivation rec {
   '' + lib.optionalString stdenv.hostPlatform.isMusl ''
     patchShebangs utils/cat_files.py
   '';
-  nativeBuildInputs = [ cmake ] ++ stdenv.lib.optional stdenv.hostPlatform.isMusl python;
+  nativeBuildInputs = [ cmake ]
+    ++ stdenv.lib.optional (stdenv.hostPlatform.isMusl || stdenv.hostPlatform.isWasi) python;
 
   buildInputs = [ libcxxabi ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
 
@@ -31,11 +32,12 @@ stdenv.mkDerivation rec {
     "-DLIBCXX_LIBCXXABI_LIB_PATH=${libcxxabi}/lib"
     "-DLIBCXX_LIBCPPABI_VERSION=2"
     "-DLIBCXX_CXX_ABI=libcxxabi"
-  ] ++ stdenv.lib.optional stdenv.hostPlatform.isMusl "-DLIBCXX_HAS_MUSL_LIBC=1"
+  ] ++ stdenv.lib.optional (stdenv.hostPlatform.isMusl || stdenv.hostPlatform.isWasi) "-DLIBCXX_HAS_MUSL_LIBC=1"
     ++ stdenv.lib.optional (stdenv.hostPlatform.useLLVM or false) "-DLIBCXX_USE_COMPILER_RT=ON"
     ++ stdenv.lib.optional stdenv.hostPlatform.isWasm [
       "-DLIBCXX_ENABLE_THREADS=OFF"
       "-DLIBCXX_ENABLE_FILESYSTEM=OFF"
+      "-DLIBCXX_ENABLE_EXCEPTIONS=OFF"
     ] ++ stdenv.lib.optional (!enableShared) "-DLIBCXX_ENABLE_SHARED=OFF";
 
   enableParallelBuilding = true;
diff --git a/pkgs/development/compilers/llvm/8/libc++abi.nix b/pkgs/development/compilers/llvm/8/libc++abi.nix
index e264a3849414..8a5e1d32c42c 100644
--- a/pkgs/development/compilers/llvm/8/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/8/libc++abi.nix
@@ -15,6 +15,7 @@ stdenv.mkDerivation {
   ] ++ stdenv.lib.optionals stdenv.hostPlatform.isWasm [
     "-DUNIX=ON"
     "-DLIBCXXABI_ENABLE_THREADS=OFF"
+    "-DLIBCXXABI_ENABLE_EXCEPTIONS=OFF"
   ] ++ stdenv.lib.optionals (!enableShared) [
     "-DLIBCXXABI_ENABLE_SHARED=OFF"
   ];

From dbb94b984f8282d1d9eada83634fc6777d19bdac Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Mon, 15 Apr 2019 22:22:16 -0400
Subject: [PATCH 03/12] wasmtime: init and use for emulation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This isn’t really an "emulator" but it’s the closest concept we have
right now.
---
 lib/systems/default.nix                       |    4 +-
 .../interpreters/wasmtime/cargo-lock.patch    | 1481 +++++++++++++++++
 .../interpreters/wasmtime/default.nix         |   31 +
 pkgs/top-level/all-packages.nix               |    2 +
 4 files changed, 1516 insertions(+), 2 deletions(-)
 create mode 100644 pkgs/development/interpreters/wasmtime/cargo-lock.patch
 create mode 100644 pkgs/development/interpreters/wasmtime/default.nix

diff --git a/lib/systems/default.nix b/lib/systems/default.nix
index c408fe46be6f..5e6d277be7d5 100644
--- a/lib/systems/default.nix
+++ b/lib/systems/default.nix
@@ -115,8 +115,8 @@ rec {
         then "${wine}/bin/${wine-name}"
         else if final.isLinux && pkgs.stdenv.hostPlatform.isLinux
         then "${qemu-user}/bin/qemu-${final.qemuArch}"
-        else if final.isWasm
-        then "${pkgs.v8}/bin/d8"
+        else if final.isWasi
+        then "${pkgs.wasmtime}/bin/wasmtime"
         else throw "Don't know how to run ${final.config} executables.";
 
     } // mapAttrs (n: v: v final.parsed) inspect.predicates
diff --git a/pkgs/development/interpreters/wasmtime/cargo-lock.patch b/pkgs/development/interpreters/wasmtime/cargo-lock.patch
new file mode 100644
index 000000000000..be5bd0ab3d3e
--- /dev/null
+++ b/pkgs/development/interpreters/wasmtime/cargo-lock.patch
@@ -0,0 +1,1481 @@
+diff --git a/Cargo.lock b/Cargo.lock
+new file mode 100644
+index 0000000..f702de1
+--- /dev/null
++++ b/Cargo.lock
+@@ -0,0 +1,1475 @@
++[[package]]
++name = "aho-corasick"
++version = "0.7.3"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "ansi_term"
++version = "0.11.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "arrayvec"
++version = "0.4.10"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "atty"
++version = "0.2.11"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
++ "termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
++ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "autocfg"
++version = "0.1.2"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++
++[[package]]
++name = "backtrace"
++version = "0.3.15"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
++ "backtrace-sys 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
++ "cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
++ "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
++ "rustc-demangle 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
++ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "backtrace-sys"
++version = "0.1.28"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
++ "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "bindgen"
++version = "0.49.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
++ "cexpr 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
++ "clang-sys 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "env_logger 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
++ "hashbrown 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
++ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
++ "peeking_take_while 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
++ "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
++ "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
++ "regex 1.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "shlex 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
++ "which 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "bitflags"
++version = "1.0.4"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++
++[[package]]
++name = "byteorder"
++version = "1.3.1"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++
++[[package]]
++name = "capstone"
++version = "0.5.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "capstone-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "capstone-sys"
++version = "0.9.1"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "cast"
++version = "0.2.2"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++
++[[package]]
++name = "cc"
++version = "1.0.35"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++
++[[package]]
++name = "cexpr"
++version = "0.3.5"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "nom 4.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "cfg-if"
++version = "0.1.7"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++
++[[package]]
++name = "chrono"
++version = "0.4.6"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
++ "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
++ "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "clang-sys"
++version = "0.28.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
++ "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
++ "libloading 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "clap"
++version = "2.33.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
++ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
++ "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "cloudabi"
++version = "0.0.3"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "cmake"
++version = "0.1.38"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "cranelift-bforest"
++version = "0.30.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "cranelift-entity 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "cranelift-codegen"
++version = "0.30.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "cranelift-bforest 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "cranelift-codegen-meta 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "cranelift-entity 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "hashmap_core 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
++ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
++ "target-lexicon 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "cranelift-codegen-meta"
++version = "0.30.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "cranelift-entity 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "cranelift-entity"
++version = "0.30.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++
++[[package]]
++name = "cranelift-frontend"
++version = "0.30.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "cranelift-codegen 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "hashmap_core 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
++ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
++ "target-lexicon 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "cranelift-native"
++version = "0.30.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "cranelift-codegen 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "raw-cpuid 6.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "target-lexicon 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "cranelift-wasm"
++version = "0.30.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
++ "cranelift-codegen 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "cranelift-entity 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "cranelift-frontend 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "hashmap_core 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
++ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
++ "wasmparser 0.29.2 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "crossbeam-deque"
++version = "0.2.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "crossbeam-epoch 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
++ "crossbeam-utils 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "crossbeam-epoch"
++version = "0.3.1"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
++ "cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
++ "crossbeam-utils 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
++ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
++ "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
++ "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "crossbeam-utils"
++version = "0.2.2"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "docopt"
++version = "1.1.0"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "regex 1.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "serde 1.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
++ "strsim 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "dynasm"
++version = "0.3.2"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
++ "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
++ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "owning_ref 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
++ "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
++ "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
++ "syn 0.15.31 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "dynasmrt"
++version = "0.3.1"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
++ "memmap 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
++ "take_mut 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "either"
++version = "1.5.2"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++
++[[package]]
++name = "env_logger"
++version = "0.5.13"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
++ "humantime 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
++ "regex 1.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "termcolor 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "env_logger"
++version = "0.6.1"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
++ "humantime 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
++ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
++ "regex 1.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "termcolor 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "errno"
++version = "0.2.4"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "errno-dragonfly 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
++ "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
++ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "errno-dragonfly"
++version = "0.1.1"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)",
++ "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "faerie"
++version = "0.9.1"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "env_logger 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
++ "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++ "goblin 0.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
++ "indexmap 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
++ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
++ "scroll 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
++ "string-interner 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
++ "structopt 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
++ "structopt-derive 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
++ "target-lexicon 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "failure"
++version = "0.1.5"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++dependencies = [
++ "backtrace 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
++ "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
++]
++
++[[package]]
++name = "failure_derive"
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++"checksum version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
++"checksum wabt 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)" = "74e463a508e390cc7447e70f640fbf44ad52e1bd095314ace1fdf99516d32add"
++"checksum wabt-sys 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)" = "a6265b25719e82598d104b3717375e37661d41753e2c84cde3f51050c7ed7e3c"
++"checksum wasmparser 0.29.2 (registry+https://github.com/rust-lang/crates.io-index)" = "981a8797cf89762e0233ec45fae731cb79a4dfaee12d9f0fe6cee01e4ac58d00"
++"checksum which 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b57acb10231b9493c8472b20cb57317d0679a49e0bdbee44b3b803a6473af164"
++"checksum winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "f10e386af2b13e47c89e7236a7a14a086791a2b88ebad6df9bf42040195cf770"
++"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
++"checksum winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7168bab6e1daee33b4557efd0e95d5ca70a03706d39fa5f3fe7a236f584b03c9"
++"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
++"checksum wincolor 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "561ed901ae465d6185fa7864d63fbd5720d0ef718366c9a4dc83cf6170d7e9ba"
diff --git a/pkgs/development/interpreters/wasmtime/default.nix b/pkgs/development/interpreters/wasmtime/default.nix
new file mode 100644
index 000000000000..882de562114a
--- /dev/null
+++ b/pkgs/development/interpreters/wasmtime/default.nix
@@ -0,0 +1,31 @@
+{ rustPlatform, fetchFromGitHub, lib, python, cmake, llvmPackages, clang }:
+
+rustPlatform.buildRustPackage rec {
+  name = "wasmtime-${version}";
+  version = "0.1.0";
+
+  src = fetchFromGitHub {
+    owner = "CraneStation";
+    repo = "wasmtime";
+    rev = "07a6ca8f4e1136ecd9f4af8d1f03a01aade60407";
+    sha256 = "1cq6nz90kaf023mcyblca90bpvbzhq8xjq01laa28v7r50lagcn5";
+    fetchSubmodules = true;
+  };
+
+  cargoSha256 = "17k8n5xar4pvvi4prhm6c51vlim9xqwkkhysbnss299mm3fyh36h";
+
+  cargoPatches = [ ./cargo-lock.patch ];
+
+  nativeBuildInputs = [ python cmake clang ];
+  buildInputs = [ llvmPackages.libclang ];
+
+  LIBCLANG_PATH = "${llvmPackages.libclang}/lib";
+
+  meta = with lib; {
+    description = "Standalone JIT-style runtime for WebAsssembly, using Cranelift";
+    homepage = https://github.com/CraneStation/wasmtime;
+    license = licenses.asl20;
+    maintainers = [ maintainers.matthewbauer ];
+    platforms = platforms.unix;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c07533522a8d..dae73418e203 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -23815,4 +23815,6 @@ in
     stdenv = crossLibcStdenv;
   };
 
+  wasmtime = callPackage ../development/interpreters/wasmtime {};
+
 }

From 556466d52feee16313138279513a08ae6d4b7e90 Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Mon, 15 Apr 2019 22:23:01 -0400
Subject: [PATCH 04/12] wasm: set -fno-exceptions

We need this to support C++ code.
---
 pkgs/development/compilers/llvm/8/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/compilers/llvm/8/default.nix b/pkgs/development/compilers/llvm/8/default.nix
index c528f8417cfa..48cf9e5e589c 100644
--- a/pkgs/development/compilers/llvm/8/default.nix
+++ b/pkgs/development/compilers/llvm/8/default.nix
@@ -106,6 +106,8 @@ let
         echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
       '' + stdenv.lib.optionalString (!stdenv.targetPlatform.isWasm) ''
         echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
+      '' + stdenv.lib.optionalString stdenv.targetPlatform.isWasm ''
+        echo "-fno-exceptions" >> $out/nix-support/cc-cflags
       '' + mkExtraBuildCommands cc;
     };
 

From 4048acb5cf533d35f25221af200fc40d07f25a63 Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Tue, 16 Apr 2019 21:32:59 -0400
Subject: [PATCH 05/12] gnu-config: bump to latest version for wasi

---
 pkgs/development/libraries/gnu-config/default.nix | 8 ++++----
 pkgs/stdenv/cross/default.nix                     | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/pkgs/development/libraries/gnu-config/default.nix b/pkgs/development/libraries/gnu-config/default.nix
index 3f0fcafa4475..7918fb7b9c4b 100644
--- a/pkgs/development/libraries/gnu-config/default.nix
+++ b/pkgs/development/libraries/gnu-config/default.nix
@@ -1,21 +1,21 @@
 { stdenv, fetchurl }:
 
 let
-  rev = "b75cdc942a6172f63b34faf642b8c797239f6776";
+  rev = "a8d79c3130da83c7cacd6fee31b9acc53799c406";
 
   # Don't use fetchgit as this is needed during Aarch64 bootstrapping
   configGuess = fetchurl {
     url = "https://git.savannah.gnu.org/cgit/config.git/plain/config.guess?id=${rev}";
-    sha256 = "1bb8z1wzjs81p9qrvji4bc2a8zyxjinz90k8xq7sxxdp6zrmq1sv";
+    sha256 = "0qbq49gr2cmf4gzrjvrmpwxxgzl3vap1xm902xa8pkcqdvriq0qw";
   };
   configSub = fetchurl {
     url = "https://git.savannah.gnu.org/cgit/config.git/plain/config.sub?id=${rev}";
-    sha256 = "00dn5i2cp4iqap5vr368r5ifrgcjfq5pr97i4dkkdbha1han5hsc";
+    sha256 = "0i699axqfkxk9mgv1hlms5r44pf0s642yz75ajjjpwzhw4d5pnv4";
   };
 in
 stdenv.mkDerivation rec {
   name = "gnu-config-${version}";
-  version = "2016-12-31";
+  version = "2019-04-15";
 
   buildCommand = ''
     mkdir -p $out
diff --git a/pkgs/stdenv/cross/default.nix b/pkgs/stdenv/cross/default.nix
index 479213f3a561..201c93786823 100644
--- a/pkgs/stdenv/cross/default.nix
+++ b/pkgs/stdenv/cross/default.nix
@@ -64,7 +64,7 @@ in lib.init bootStages ++ [
              (hostPlatform.isLinux && !buildPlatform.isLinux)
              [ buildPackages.patchelf ]
         ++ lib.optional
-             (let f = p: !p.isx86 || p.libc == "musl"; in f hostPlatform && !(f buildPlatform))
+             (let f = p: !p.isx86 || p.libc == "musl" || p.libc == "wasilibc"; in f hostPlatform && !(f buildPlatform))
              buildPackages.updateAutotoolsGnuConfigScriptsHook
            # without proper `file` command, libtool sometimes fails
            # to recognize 64-bit DLLs

From 1a7a96a093c8c3ee25ab18e36473394e1e2a5b0a Mon Sep 17 00:00:00 2001
From: John Ericson <git@JohnEricson.me>
Date: Tue, 16 Apr 2019 23:55:31 -0400
Subject: [PATCH 06/12] stdenv, compiler-rt: Compress WASI conditionals

---
 pkgs/development/compilers/llvm/8/compiler-rt.nix | 4 +---
 pkgs/stdenv/generic/default.nix                   | 5 +----
 2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/pkgs/development/compilers/llvm/8/compiler-rt.nix b/pkgs/development/compilers/llvm/8/compiler-rt.nix
index 3e225626aa6d..33eef4358256 100644
--- a/pkgs/development/compilers/llvm/8/compiler-rt.nix
+++ b/pkgs/development/compilers/llvm/8/compiler-rt.nix
@@ -53,15 +53,13 @@ stdenv.mkDerivation rec {
   '';
 
   # Hack around weird upsream RPATH bug
-  postInstall = stdenv.lib.optionalString stdenv.isDarwin ''
+  postInstall = stdenv.lib.optionalString (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isWasm) ''
     ln -s "$out/lib"/*/* "$out/lib"
   '' + stdenv.lib.optionalString (stdenv.hostPlatform.useLLVM or false) ''
     ln -s $out/lib/*/clang_rt.crtbegin-*.o $out/lib/crtbegin.o
     ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/crtend.o
     ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/crtbeginS.o
     ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
-  '' + stdenv.lib.optionalString stdenv.hostPlatform.isWasm ''
-    ln -s $out/lib/*/* $out/lib
   '';
 
   NIX_LDFLAGS = stdenv.lib.optionalString stdenv.hostPlatform.isWasm "--allow-undefined --no-entry";
diff --git a/pkgs/stdenv/generic/default.nix b/pkgs/stdenv/generic/default.nix
index ed022422c26e..1ef2ab52029b 100644
--- a/pkgs/stdenv/generic/default.nix
+++ b/pkgs/stdenv/generic/default.nix
@@ -88,10 +88,7 @@ let
       # there (yet?) so it goes here until then.
       preHook = preHook+ lib.optionalString buildPlatform.isDarwin ''
         export NIX_BUILD_DONT_SET_RPATH=1
-      '' + lib.optionalString hostPlatform.isDarwin ''
-        export NIX_DONT_SET_RPATH=1
-        export NIX_NO_SELF_RPATH=1
-      '' + lib.optionalString (hostPlatform.parsed.kernel.execFormat != lib.systems.parse.execFormats.elf && hostPlatform.parsed.kernel.execFormat != lib.systems.parse.execFormats.macho) ''
+      '' + lib.optionalString (hostPlatform.isDarwin || (hostPlatform.parsed.kernel.execFormat != lib.systems.parse.execFormats.elf && hostPlatform.parsed.kernel.execFormat != lib.systems.parse.execFormats.macho)) ''
         export NIX_DONT_SET_RPATH=1
         export NIX_NO_SELF_RPATH=1
       ''

From 9044f57d183dcf2443df52ccc58911970171584d Mon Sep 17 00:00:00 2001
From: John Ericson <git@JohnEricson.me>
Date: Wed, 17 Apr 2019 00:16:36 -0400
Subject: [PATCH 07/12] compiler-rt: Don't try to build a test executable

Got this trick from stack overflow to avoid needing compiler-rt to link
the test exe before building compiler-rt. a static lib isn't linked at
all, and so breaks the cycle.
---
 pkgs/development/compilers/llvm/8/compiler-rt.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/compilers/llvm/8/compiler-rt.nix b/pkgs/development/compilers/llvm/8/compiler-rt.nix
index 33eef4358256..2b591cc94aff 100644
--- a/pkgs/development/compilers/llvm/8/compiler-rt.nix
+++ b/pkgs/development/compilers/llvm/8/compiler-rt.nix
@@ -19,6 +19,8 @@ stdenv.mkDerivation rec {
     "-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
     "-DCOMPILER_RT_BUILD_PROFILE=OFF"
     "-DCOMPILER_RT_BAREMETAL_BUILD=ON"
+    #https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
+    "-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
     "-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
   ] ++ stdenv.lib.optionals stdenv.hostPlatform.isMusl [
     "-DCOMPILER_RT_BUILD_SANITIZERS=OFF"
@@ -62,7 +64,5 @@ stdenv.mkDerivation rec {
     ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
   '';
 
-  NIX_LDFLAGS = stdenv.lib.optionalString stdenv.hostPlatform.isWasm "--allow-undefined --no-entry";
-
   enableParallelBuilding = true;
 }

From 721832f97ec96a4fd34549eada8c58314a457f9c Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Wed, 17 Apr 2019 00:24:37 -0400
Subject: [PATCH 08/12] libiconv: get just headers from wasilibc

---
 pkgs/top-level/all-packages.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index dae73418e203..fe39c4ec3306 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -10311,7 +10311,7 @@ in
     else if stdenv.targetPlatform.useiOSPrebuilt then targetPackages.darwin.iosSdkPkgs.libraries or darwin.iosSdkPkgs.libraries
     else if name == "libSystem" then targetPackages.darwin.xcode
     else if name == "nblibc" then targetPackages.netbsdCross.libc
-    else if name == "wasilibc" then targetPackages.wasilibc
+    else if name == "wasilibc" then targetPackages.wasilibc or wasilibc
     else throw "Unknown libc ${name}";
 
   libcCross = assert stdenv.targetPlatform != stdenv.buildPlatform; libcCrossChooser stdenv.targetPlatform.libc;
@@ -11402,7 +11402,7 @@ in
   # We also provide `libiconvReal`, which will always be a standalone libiconv,
   # just in case you want it regardless of platform.
   libiconv =
-    if (stdenv.hostPlatform.libc == "glibc" || stdenv.hostPlatform.libc == "musl")
+    if lib.elem stdenv.hostPlatform.libc ["glibc" "musl" "wasilibc"]
       then glibcIconv (if stdenv.hostPlatform != stdenv.buildPlatform
                        then libcCross
                        else stdenv.cc.libc)

From a4cfd500044617059d0cfbe804c6814151f7c7e4 Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Wed, 17 Apr 2019 01:04:30 -0400
Subject: [PATCH 09/12] libcxxabi: apply libcxxabi-wasm patch

---
 pkgs/development/compilers/llvm/8/libc++abi.nix  |  3 ++-
 .../compilers/llvm/8/libcxxabi-wasm.patch        | 16 ++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 pkgs/development/compilers/llvm/8/libcxxabi-wasm.patch

diff --git a/pkgs/development/compilers/llvm/8/libc++abi.nix b/pkgs/development/compilers/llvm/8/libc++abi.nix
index 8a5e1d32c42c..bb5b368267f2 100644
--- a/pkgs/development/compilers/llvm/8/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/8/libc++abi.nix
@@ -13,7 +13,6 @@ stdenv.mkDerivation {
     "-DLLVM_ENABLE_LIBCXX=ON"
     "-DLIBCXXABI_USE_LLVM_UNWINDER=ON"
   ] ++ stdenv.lib.optionals stdenv.hostPlatform.isWasm [
-    "-DUNIX=ON"
     "-DLIBCXXABI_ENABLE_THREADS=OFF"
     "-DLIBCXXABI_ENABLE_EXCEPTIONS=OFF"
   ] ++ stdenv.lib.optionals (!enableShared) [
@@ -30,6 +29,8 @@ stdenv.mkDerivation {
     export TRIPLE=x86_64-apple-darwin
   '' + stdenv.lib.optionalString stdenv.hostPlatform.isMusl ''
     patch -p1 -d $(ls -d libcxx-*) -i ${../libcxx-0001-musl-hacks.patch}
+  '' + stdenv.lib.optionalString stdenv.hostPlatform.isWasm ''
+    patch -p1 -d $(ls -d llvm-*) -i ${./libcxxabi-wasm.patch}
   '';
 
   installPhase = if stdenv.isDarwin
diff --git a/pkgs/development/compilers/llvm/8/libcxxabi-wasm.patch b/pkgs/development/compilers/llvm/8/libcxxabi-wasm.patch
new file mode 100644
index 000000000000..4ebfe46aa813
--- /dev/null
+++ b/pkgs/development/compilers/llvm/8/libcxxabi-wasm.patch
@@ -0,0 +1,16 @@
+diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
+index 15497d405e0..33f7f18193a 100644
+--- a/cmake/modules/HandleLLVMOptions.cmake
++++ b/cmake/modules/HandleLLVMOptions.cmake
+@@ -127,7 +127,10 @@ else(WIN32)
+       set(LLVM_HAVE_LINK_VERSION_SCRIPT 1)
+     endif()
+   else(FUCHSIA OR UNIX)
+-    MESSAGE(SEND_ERROR "Unable to determine platform")
++    if(${CMAKE_SYSTEM_NAME} MATCHES "Wasi")
++    else()
++      MESSAGE(SEND_ERROR "Unable to determine platform")
++    endif()
+   endif(FUCHSIA OR UNIX)
+ endif(WIN32)
+ 

From 6948ffd398086f2da02397e1391c8f555c46f66f Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Wed, 17 Apr 2019 19:49:12 -0400
Subject: [PATCH 10/12] wasilibc: use .imports file for lld

instead of passing in the --allow-undefined-file, we can just let lld
find the file.
---
 pkgs/build-support/cc-wrapper/default.nix       | 2 --
 pkgs/development/libraries/wasilibc/default.nix | 1 +
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/pkgs/build-support/cc-wrapper/default.nix b/pkgs/build-support/cc-wrapper/default.nix
index ddec3d0931ff..5f478c823e7a 100644
--- a/pkgs/build-support/cc-wrapper/default.nix
+++ b/pkgs/build-support/cc-wrapper/default.nix
@@ -301,8 +301,6 @@ stdenv.mkDerivation {
 
     + optionalString targetPlatform.isWasm ''
       hardening_unsupported_flags+=" stackprotector fortify pie pic"
-    '' + optionalString (targetPlatform.isWasm && libc != null) ''
-      echo "--allow-undefined-file=${libc}/share/wasm32-wasi/undefined-symbols.txt" >> $out/nix-support/cc-ldflags
     ''
 
     + optionalString (libc != null && targetPlatform.isAvr) ''
diff --git a/pkgs/development/libraries/wasilibc/default.nix b/pkgs/development/libraries/wasilibc/default.nix
index f783540797ce..229d67b81edd 100644
--- a/pkgs/development/libraries/wasilibc/default.nix
+++ b/pkgs/development/libraries/wasilibc/default.nix
@@ -17,6 +17,7 @@ stdenv.mkDerivation {
 
   postInstall = ''
     mv $out/lib/*/* $out/lib
+    ln -s $out/share/wasm32-wasi/undefined-symbols.txt $out/lib/wasi.imports
   '';
 
   meta = {

From e2a1dc6a44ec3801c4fe3059eabbd7d0ac8983df Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Wed, 17 Apr 2019 19:52:25 -0400
Subject: [PATCH 11/12] =?UTF-8?q?libgmp:=20don=E2=80=99t=20compile=20with?=
 =?UTF-8?q?=20cpp=20on=20wasm?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

We don’t have full C++ support for things like threads or exceptions.
---
 pkgs/development/libraries/gmp/6.x.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/gmp/6.x.nix b/pkgs/development/libraries/gmp/6.x.nix
index ce78f3230882..f320c303123e 100644
--- a/pkgs/development/libraries/gmp/6.x.nix
+++ b/pkgs/development/libraries/gmp/6.x.nix
@@ -1,4 +1,5 @@
-{ stdenv, fetchurl, m4, cxx ? !stdenv.hostPlatform.useAndroidPrebuilt
+{ stdenv, fetchurl, m4
+, cxx ? !stdenv.hostPlatform.useAndroidPrebuilt && !stdenv.hostPlatform.isWasm
 , buildPackages
 , withStatic ? false }:
 

From 008c9a70a57f0448b275179bfbc10c8750f29069 Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Tue, 23 Apr 2019 21:51:30 -0400
Subject: [PATCH 12/12] release-cross: add wasi targets

Add a few working cross targets to make sure things keep working.
---
 pkgs/top-level/release-cross.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pkgs/top-level/release-cross.nix b/pkgs/top-level/release-cross.nix
index af400aee8717..86864bb17a75 100644
--- a/pkgs/top-level/release-cross.nix
+++ b/pkgs/top-level/release-cross.nix
@@ -54,6 +54,13 @@ let
     windows.mingw_w64_pthreads = nativePlatforms;
   };
 
+  wasiCommon = {
+    gmp = nativePlatforms;
+    boehmgc = nativePlatforms;
+    hello = nativePlatforms;
+    zlib = nativePlatforms;
+  };
+
   darwinCommon = {
     buildPackages.binutils = darwin;
   };
@@ -140,6 +147,8 @@ in
   android64 = mapTestOnCross lib.systems.examples.aarch64-android-prebuilt (linuxCommon // {
   });
 
+  wasi32 = mapTestOnCross lib.systems.examples.wasi32 wasiCommon;
+
   msp430 = mapTestOnCross lib.systems.examples.msp430 embedded;
   avr = mapTestOnCross lib.systems.examples.avr embedded;
   arm-embedded = mapTestOnCross lib.systems.examples.arm-embedded embedded;