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|
{
lib,
stdenv,
fetchFromGitHub,
fetchpatch,
python3,
nodejs,
closurecompiler,
jre,
binaryen,
llvmPackages,
symlinkJoin,
makeWrapper,
replaceVars,
buildNpmPackage,
emscripten,
}:
stdenv.mkDerivation rec {
pname = "emscripten";
version = "4.0.11";
llvmEnv = symlinkJoin {
name = "emscripten-llvm-${version}";
paths = with llvmPackages; [
clang-unwrapped
(lib.getLib clang-unwrapped)
lld
llvm
];
};
nodeModules = buildNpmPackage {
name = "emscripten-node-modules-${version}";
inherit pname version src;
npmDepsHash = "sha256-Pos7pSboTIpGKtlBm56hJPYb1lDydmUwW1urHetFfeQ=";
dontBuild = true;
# Copy node_modules directly.
installPhase = ''
cp -r node_modules $out/
'';
};
src = fetchFromGitHub {
owner = "emscripten-core";
repo = "emscripten";
hash = "sha256-QNbXgTkzI0fqvg3nU2TAE8A8h6MNMm2TsTzOXBdpqYA=";
rev = version;
};
nativeBuildInputs = [ makeWrapper ];
buildInputs = [
nodejs
python3
];
patches = [
(replaceVars ./0001-emulate-clang-sysroot-include-logic.patch {
resourceDir = "${llvmEnv}/lib/clang/${lib.versions.major llvmPackages.llvm.version}/";
})
];
buildPhase = ''
runHook preBuild
patchShebangs .
# emscripten 4 requires LLVM tip-of-tree instead of LLVM 20
sed -i -e "s/EXPECTED_LLVM_VERSION = 21/EXPECTED_LLVM_VERSION = 20.1/g" tools/shared.py
# fixes cmake support
sed -i -e "s/print \('emcc (Emscript.*\)/sys.stderr.write(\1); sys.stderr.flush()/g" emcc.py
sed -i "/^def check_sanity/a\\ return" tools/shared.py
echo "EMSCRIPTEN_ROOT = '$out/share/emscripten'" > .emscripten
echo "LLVM_ROOT = '${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
runHook postBuild
'';
installPhase = ''
runHook preInstall
appdir=$out/share/emscripten
mkdir -p $appdir
cp -r . $appdir
chmod -R +w $appdir
mkdir -p $appdir/node_modules/.bin
cp -r ${nodeModules}/* $appdir/node_modules
cp -r ${nodeModules}/* $appdir/node_modules/.bin
cp ${./locate_cache.sh} $appdir/locate_cache.sh
chmod +x $appdir/locate_cache.sh
export EM_CACHE=$out/share/emscripten/cache
mkdir -p $out/bin
for b in em++ em-config emar embuilder.py emcc emcmake emconfigure emmake emranlib emrun emscons emsize; do
makeWrapper $appdir/$b $out/bin/$b \
--set NODE_PATH ${nodeModules} \
--set EM_EXCLUSIVE_CACHE_ACCESS 1 \
--set PYTHON ${python3}/bin/python \
--run "source $appdir/locate_cache.sh"
done
# precompile libc (etc.) in all variants:
pushd $TMPDIR
echo 'int __main_argc_argv( int a, int b ) { return 42; }' >test.c
for LTO in -flto ""; do
for BIND in "" "--bind"; do
# starting with emscripten 3.1.32+,
# if pthreads and relocatable are both used,
# _emscripten_thread_exit_joinable must be exported
# (see https://github.com/emscripten-core/emscripten/pull/18376)
# TODO: get library cache to build with both enabled and function exported
$out/bin/emcc $LTO $BIND test.c
$out/bin/emcc $LTO $BIND -s RELOCATABLE test.c
# starting with emscripten 3.1.48+,
# to use pthreads, _emscripten_check_mailbox must be exported
# (see https://github.com/emscripten-core/emscripten/pull/20604)
# TODO: get library cache to build with pthreads at all
# $out/bin/emcc $LTO $BIND -s USE_PTHREADS test.c
done
done
popd
export PYTHON=${python3}/bin/python
export NODE_PATH=${nodeModules}
pushd $appdir
python test/runner.py test_hello_world
popd
runHook postInstall
'';
passthru = {
# HACK: Make emscripten look more like a cc-wrapper to GHC
# when building the javascript backend.
targetPrefix = "em";
bintools = emscripten;
};
meta = with lib; {
homepage = "https://github.com/emscripten-core/emscripten";
description = "LLVM-to-JavaScript Compiler";
platforms = platforms.all;
maintainers = with maintainers; [
qknight
matthewbauer
raitobezarius
willcohen
];
license = licenses.ncsa;
};
}
|
