Compile DENO on Alpine (w/MUSL C)

Dockerfile

FROM rust:alpine

RUN apk add --no-cache \
    bash \
    binutils-gold \
    ca-certificates \
    clang \
    curl \
    g++ \
    git \
    glib-dev \
    icu-dev \
    libgc++ \
    libstdc++ \
    libunwind-dev \
    llvm-libunwind \
    llvm9-dev \
    llvm9-libs \
    make \
    musl-dev \
    ninja \
    python2 \
    re2c \
    sed \
    tar \
    vim \
    wget \
    xen-dev \
    xz

RUN git clone --recurse-submodules https://github.com/denoland/deno.git

WORKDIR /deno

RUN git clone https://gn.googlesource.com/gn \
 && cd gn \
 && python build/gen.py \
 && ninja -C out \
 && out/gn_unittests \
 && cp out/gn /usr/local/bin/

ENV V8_FROM_SOURCE=1 

ENV CLANG_BASE_PATH /usr
ENV NINJA /usr/bin/ninja
ENV GN /usr/local/bin/gn
ENV TARGET x86_64-alpine-linux-musl
ENV GN_ARGS no_inline_line_tables=false use_lld=false
ENV RUSTFLAGS -C target-feature=-crt-static

RUN cargo fetch

COPY rusty-changed-build.diff .
RUN patch -p0 < rusty-changed-build.diff

RUN cargo build --release

# ---

FROM alpine

RUN apk add --no-cache libgcc

COPY --from=0 /deno/target/release/deno /usr/bin/

CMD [ "/usr/bin/deno" ]

rusty-changed-build.diff

--- /tmp/rusty_v8/BUILD.gn
+++ /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/rusty_v8-0.4.2/BUILD.gn
@@ -28,12 +28,15 @@
   # internal V8 headers.
   include_dirs = [
     "v8",
+    "/usr/lib/gcc/x86_64-alpine-linux-musl/9.2.0/include",
     "$target_gen_dir/v8",
   ]
 
   if (is_debug) {
     defines = [ "DEBUG" ]
   }
+
+  defines = ["_LIBCPP_HAS_MUSL_LIBC"]
 
   if (is_clang) {
     cflags += [
--- /tmp/rusty_v8/build/config/compiler/BUILD.gn
+++ /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/rusty_v8-0.4.2/build/config/compiler/BUILD.gn
@@ -416,7 +416,7 @@
   # Linux-specific compiler flags setup.
   # ------------------------------------
   if ((is_posix || is_fuchsia) && use_lld) {
-    ldflags += [ "-fuse-ld=lld" ]
+    ldflags += [ "-fuse-ld=gold" ]
     if (current_cpu == "arm64") {
       # Reduce the page size from 65536 in order to reduce binary size slightly
       # by shrinking the alignment gap between segments. This also causes all
@@ -492,9 +492,9 @@
     if (is_win) {
       # On Windows, we call the linker directly, instead of calling it through
       # the driver.
-      ldflags += [ "--color-diagnostics" ]
+      ldflags += [  ]
     } else {
-      ldflags += [ "-Wl,--color-diagnostics" ]
+      ldflags += [  ]
     }
   }
 
--- /tmp/rusty_v8/buildtools/third_party/libc++/BUILD.gn
+++ /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/rusty_v8-0.4.2/buildtools/third_party/libc++/BUILD.gn
@@ -124,7 +124,7 @@
     configs += [ "//build/config/gcc:symbol_visibility_default" ]
   }
 
-  defines = [ "_LIBCPP_BUILDING_LIBRARY" ]
+  defines = [ "_LIBCPP_BUILDING_LIBRARY", "_LIBCPP_HAS_MUSL_LIBC" ]
   if (!is_clang && libcxx_is_shared) {
     # This is a temporary workaround to get libc++ builds working with
     # gcc.  It can be removed with either
--- /tmp/rusty_v8/third_party/zlib/BUILD.gn
+++ /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/rusty_v8-0.4.2/third_party/zlib/BUILD.gn
@@ -13,7 +13,10 @@
 }
 
 config("zlib_config") {
-  include_dirs = [ "." ]
+  include_dirs = [
+    ".",
+    "/usr/lib/gcc/x86_64-alpine-linux-musl/9.2.0/include"
+  ]
 }
 
 config("zlib_internal_config") {
@@ -30,8 +33,8 @@
   }
 }
 
-use_x86_x64_optimizations =
-    (current_cpu == "x86" || current_cpu == "x64") && !is_ios
+use_x86_x64_optimizations = false
+#    (current_cpu == "x86" || current_cpu == "x64") && !is_ios
 
 config("zlib_adler32_simd_config") {
   if (use_x86_x64_optimizations) {
--- /tmp/rusty_v8/tools/clang/scripts/build.py
+++ /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/rusty_v8-0.4.2/tools/clang/scripts/build.py
@@ -538,10 +538,10 @@
     base_cmake_args.append('-DLLVM_USE_CRT_RELEASE=MT')
 
     # Require zlib compression.
-    zlib_dir = AddZlibToPath()
-    cflags.append('-I' + zlib_dir)
-    cxxflags.append('-I' + zlib_dir)
-    ldflags.append('-LIBPATH:' + zlib_dir)
+    # zlib_dir = AddZlibToPath()
+    # cflags.append('-I' + zlib_dir)
+    # cxxflags.append('-I' + zlib_dir)
+    # ldflags.append('-LIBPATH:' + zlib_dir)
 
   if sys.platform != 'win32':
     # libxml2 is required by the Win manifest merging tool used in cross-builds.
--- /tmp/rusty_v8/v8/BUILD.gn
+++ /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/rusty_v8-0.4.2/v8/BUILD.gn
@@ -354,7 +353,7 @@
   if (is_component_build) {
     defines = [ "USING_V8_BASE_SHARED" ]
   }
-  libs = []
+  libs = ["execinfo"]
   if (is_android && current_toolchain != host_toolchain) {
     libs += [ "log" ]
   }
@@ -562,7 +561,7 @@
 config("toolchain") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
-  defines = []
+  defines = ["_LIBCPP_HAS_MUSL_LIBC"]
   cflags = []
   ldflags = []
 
@@ -3558,7 +3557,7 @@
   }
 
   deps += [
-    "//third_party/zlib",
+    # "//third_party/zlib",
     "//third_party/zlib/google:compression_utils_portable",
   ]
 
--- /tmp/rusty_v8/v8/DEPS
+++ /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/rusty_v8-0.4.2/v8/DEPS
@@ -269,8 +269,8 @@
     Var('android_url') + '/platform/external/perfetto.git' + '@' + '9bd480acdcad450c5ed5d2aa329eb603c53e5f40',
   'v8/third_party/protobuf':
     Var('chromium_url') + '/external/github.com/google/protobuf'+ '@' + 'b68a347f56137b4b1a746e8c7438495a6ac1bd91',
-  'v8/third_party/zlib':
-    Var('chromium_url') + '/chromium/src/third_party/zlib.git'+ '@' + '21c6af6f18e5ad9c3b9d103f8cfdbf926ca35f7c',
+  # 'v8/third_party/zlib':
+  #   Var('chromium_url') + '/chromium/src/third_party/zlib.git'+ '@' + '21c6af6f18e5ad9c3b9d103f8cfdbf926ca35f7c',
   'v8/third_party/jsoncpp/source':
     Var('chromium_url') + '/external/github.com/open-source-parsers/jsoncpp.git'+ '@' + '645250b6690785be60ab6780ce4b58698d884d11',
   'v8/third_party/ittapi': {