119 lines
3.8 KiB
Nix
119 lines
3.8 KiB
Nix
{ lib, stdenv, fetchFromGitHub, python3, nodejs, closurecompiler
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, jre, binaryen
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, llvmPackages_11
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, symlinkJoin, makeWrapper
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, mkYarnModules
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}:
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stdenv.mkDerivation rec {
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pname = "emscripten";
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version = "2.0.10";
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llvmEnv = symlinkJoin {
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name = "emscripten-llvm-${version}";
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paths = with llvmPackages_11; [ clang-unwrapped lld llvm ];
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};
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nodeModules = mkYarnModules {
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name = "emscripten-node-modules-${version}";
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inherit pname version;
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# it is vitally important the the package.json has name and version fields
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packageJSON = ./package.json;
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yarnLock = ./yarn.lock;
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yarnNix = ./yarn.nix;
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};
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src = fetchFromGitHub {
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owner = "emscripten-core";
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repo = "emscripten";
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sha256 = "0jy4n1pykk9vkm5da9v3qsfrl6j7yhngcazh2792xxs6wzfcs9gk";
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rev = version;
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};
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nativeBuildInputs = [ makeWrapper ];
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buildInputs = [ nodejs python3 ];
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buildPhase = ''
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patchShebangs .
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# fixes cmake support
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sed -i -e "s/print \('emcc (Emscript.*\)/sys.stderr.write(\1); sys.stderr.flush()/g" emcc.py
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# disables cache in user home, use installation directory instead
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sed -i '/^def/!s/root_is_writable()/True/' tools/shared.py
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sed -i "/^def check_sanity/a\\ return" tools/shared.py
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# super ugly: monkeypatch to add sysroot/include to the include
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# path because they are otherwise not part of Nix's clang.
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sed -i "490a\\ '/include'," tools/shared.py
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# required for wasm2c
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ln -s ${nodeModules}/node_modules .
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echo "EMSCRIPTEN_ROOT = '$out/share/emscripten'" > .emscripten
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echo "LLVM_ROOT = '${llvmEnv}/bin'" >> .emscripten
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echo "NODE_JS = '${nodejs}/bin/node'" >> .emscripten
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echo "JS_ENGINES = [NODE_JS]" >> .emscripten
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echo "CLOSURE_COMPILER = ['${closurecompiler}/bin/closure-compiler']" >> .emscripten
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echo "JAVA = '${jre}/bin/java'" >> .emscripten
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# to make the test(s) below work
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# echo "SPIDERMONKEY_ENGINE = []" >> .emscripten
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echo "BINARYEN_ROOT = '${binaryen}'" >> .emscripten
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# make emconfigure/emcmake use the correct (wrapped) binaries
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sed -i "s|^EMCC =.*|EMCC='$out/bin/emcc'|" tools/shared.py
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sed -i "s|^EMXX =.*|EMXX='$out/bin/em++'|" tools/shared.py
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sed -i "s|^EMAR =.*|EMAR='$out/bin/emar'|" tools/shared.py
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sed -i "s|^EMRANLIB =.*|EMRANLIB='$out/bin/emranlib'|" tools/shared.py
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# The tests use the C compiler to compile generated C code,
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# use the wrapped compiler
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sed -i 's/shared.CLANG_CC/"cc"/' tests/runner.py
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'';
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installPhase = ''
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appdir=$out/share/emscripten
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mkdir -p $appdir
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cp -r . $appdir
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chmod -R +w $appdir
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mkdir -p $out/bin
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for b in em++ em-config emar embuilder.py emcc emcmake emconfigure emmake emranlib emrun emscons; do
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makeWrapper $appdir/$b $out/bin/$b \
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--set NODE_PATH ${nodeModules}/node_modules \
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--set EM_EXCLUSIVE_CACHE_ACCESS 1 \
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--set PYTHON ${python3}/bin/python
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done
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# precompile libc (etc.) in all variants:
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pushd $TMPDIR
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echo 'int main() { return 42; }' >test.c
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for LTO in -flto ""; do
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# wasm2c doesn't work with PIC
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$out/bin/emcc -s WASM2C -s STANDALONE_WASM $LTO test.c
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for BIND in "" "--bind"; do
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for MT in "" "-s USE_PTHREADS"; do
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for RELOCATABLE in "" "-s RELOCATABLE"; do
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$out/bin/emcc $RELOCATABLE $BIND $MT $LTO test.c
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done
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done
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done
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done
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popd
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export PYTHON=${python3}/bin/python
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export NODE_PATH=${nodeModules}/node_modules
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pushd $appdir
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python tests/runner.py test_hello_world
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popd
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'';
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meta = with lib; {
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homepage = "https://github.com/emscripten-core/emscripten";
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description = "An LLVM-to-JavaScript Compiler";
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platforms = platforms.all;
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maintainers = with maintainers; [ qknight matthewbauer ];
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license = licenses.ncsa;
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};
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}
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