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{ stdenv, fetchFromGitHub, python3, nodejs, closurecompiler
, jre, binaryen
, llvmPackages_11
, symlinkJoin, makeWrapper
, mkYarnModules
}:
stdenv.mkDerivation rec {
pname = "emscripten";
version = "2.0.1";
llvmEnv = symlinkJoin {
name = "emscripten-llvm-${version}";
paths = with llvmPackages_11; [ clang-unwrapped lld llvm ];
};
nodeModules = mkYarnModules {
name = "emscripten-node-modules-${version}";
inherit pname version;
# it is vitally important the the package.json has name and version fields
packageJSON = ./package.json;
yarnLock = ./yarn.lock;
yarnNix = ./yarn.nix;
};
src = fetchFromGitHub {
owner = "emscripten-core";
repo = "emscripten";
sha256 = "06dsd819qjv4n2ihrz1mpn5aigmbv0gpkm7iw06wrqx30nzphnpk";
rev = version;
};
nativeBuildInputs = [ makeWrapper ];
buildInputs = [ nodejs python3 ];
buildPhase = ''
patchShebangs .
# fixes cmake support
sed -i -e "s/print \('emcc (Emscript.*\)/sys.stderr.write(\1); sys.stderr.flush()/g" emcc.py
# disables cache in user home, use installation directory instead
sed -i '/^def/!s/root_is_writable()/True/' tools/shared.py
sed -i "/^def check_sanity/a\\ return" tools/shared.py
# required for wasm2c
ln -s ${nodeModules}/node_modules .
echo "EMSCRIPTEN_ROOT = '$appdir'" > .emscripten
echo "LLVM_ROOT = '${llvmEnv}/bin'" >> .emscripten
echo "NODE_JS = '${nodejs}/bin/node'" >> .emscripten
echo "JS_ENGINES = [NODE_JS]" >> .emscripten
echo "CLOSURE_COMPILER = ['${closurecompiler}/bin/closure-compiler']" >> .emscripten
echo "JAVA = '${jre}/bin/java'" >> .emscripten
# to make the test(s) below work
# echo "SPIDERMONKEY_ENGINE = []" >> .emscripten
echo "BINARYEN_ROOT = '${binaryen}'" >> .emscripten
# make emconfigure/emcmake use the correct (wrapped) binaries
sed -i "s|^EMCC =.*|EMCC='$out/bin/emcc'|" tools/shared.py
sed -i "s|^EMXX =.*|EMXX='$out/bin/em++'|" tools/shared.py
sed -i "s|^EMAR =.*|EMAR='$out/bin/emar'|" tools/shared.py
sed -i "s|^EMRANLIB =.*|EMRANLIB='$out/bin/emranlib'|" tools/shared.py
# The tests use the C compiler to compile generated C code,
# use the wrapped compiler
sed -i 's/shared.CLANG_CC/"cc"/' tests/runner.py
'';
installPhase = ''
appdir=$out/share/emscripten
mkdir -p $appdir
cp -r . $appdir
chmod -R +w $appdir
mkdir -p $out/bin
for b in em++ em-config emar embuilder.py emcc emcmake emconfigure emlink.py emmake emranlib emrun emscons; do
makeWrapper $appdir/$b $out/bin/$b \
--set NODE_PATH ${nodeModules}/node_modules \
--set EM_EXCLUSIVE_CACHE_ACCESS 1 \
--set PYTHON ${python3}/bin/python
done
# precompile libc (etc.) in all variants:
pushd $TMPDIR
echo 'int main() { return 42; }' >test.c
for LTO in -flto ""; do
# wasm2c doesn't work with PIC
$out/bin/emcc -s WASM2C -s STANDALONE_WASM $LTO test.c
for RELOCATABLE in "" "-s RELOCATABLE"; do
$out/bin/emcc $RELOCATABLE $LTO test.c
done
done
popd
export PYTHON=${python3}/bin/python
export NODE_PATH=${nodeModules}/node_modules
pushd $appdir
python tests/runner.py test_hello_world
popd
'';
meta = with stdenv.lib; {
homepage = "https://github.com/emscripten-core/emscripten";
description = "An LLVM-to-JavaScript Compiler";
platforms = platforms.all;
maintainers = with maintainers; [ qknight matthewbauer ];
license = licenses.ncsa;
};
}
|
