pyrox.dev
1{ lib, stdenv, fetchFromGitHub, python3, nodejs, closurecompiler
2, jre, binaryen
3, llvmPackages
4, symlinkJoin, makeWrapper, substituteAll
5, buildNpmPackage
6, emscripten
7}:
8
9stdenv.mkDerivation rec {
10 pname = "emscripten";
11 version = "3.1.47";
12
13 llvmEnv = symlinkJoin {
14 name = "emscripten-llvm-${version}";
15 paths = with llvmPackages; [ clang-unwrapped clang-unwrapped.lib lld llvm ];
16 };
17
18 nodeModules = buildNpmPackage {
19 name = "emscripten-node-modules-${version}";
20 inherit pname version src;
21
22 npmDepsHash = "sha256-Qft+//za5ed6Oquxtcdpv7g5oOc2WmWuRJ/CDe+FEiI=";
23
24 dontBuild = true;
25
26 # Copy node_modules directly.
27 installPhase = ''
28 cp -r node_modules $out/
29 '';
30 };
31
32 src = fetchFromGitHub {
33 owner = "emscripten-core";
34 repo = "emscripten";
35 hash = "sha256-cRNkQ+7vUqJLNlf5dieeDcyT1jlBUeVxO8avoUvOPHI=";
36 rev = version;
37 };
38
39 nativeBuildInputs = [ makeWrapper ];
40 buildInputs = [ nodejs python3 ];
41
42 patches = [
43 (substituteAll {
44 src = ./0001-emulate-clang-sysroot-include-logic.patch;
45 resourceDir = "${llvmEnv}/lib/clang/16/";
46 })
47 ];
48
49 buildPhase = ''
50 runHook preBuild
51
52 patchShebangs .
53
54 # fixes cmake support
55 sed -i -e "s/print \('emcc (Emscript.*\)/sys.stderr.write(\1); sys.stderr.flush()/g" emcc.py
56
57 # disables cache in user home, use installation directory instead
58 sed -i '/^def/!s/root_is_writable()/True/' tools/config.py
59 sed -i "/^def check_sanity/a\\ return" tools/shared.py
60
61 echo "EMSCRIPTEN_ROOT = '$out/share/emscripten'" > .emscripten
62 echo "LLVM_ROOT = '${llvmEnv}/bin'" >> .emscripten
63 echo "NODE_JS = '${nodejs}/bin/node'" >> .emscripten
64 echo "JS_ENGINES = [NODE_JS]" >> .emscripten
65 echo "CLOSURE_COMPILER = ['${closurecompiler}/bin/closure-compiler']" >> .emscripten
66 echo "JAVA = '${jre}/bin/java'" >> .emscripten
67 # to make the test(s) below work
68 # echo "SPIDERMONKEY_ENGINE = []" >> .emscripten
69 echo "BINARYEN_ROOT = '${binaryen}'" >> .emscripten
70
71 # make emconfigure/emcmake use the correct (wrapped) binaries
72 sed -i "s|^EMCC =.*|EMCC='$out/bin/emcc'|" tools/shared.py
73 sed -i "s|^EMXX =.*|EMXX='$out/bin/em++'|" tools/shared.py
74 sed -i "s|^EMAR =.*|EMAR='$out/bin/emar'|" tools/shared.py
75 sed -i "s|^EMRANLIB =.*|EMRANLIB='$out/bin/emranlib'|" tools/shared.py
76
77 runHook postBuild
78 '';
79
80 installPhase = ''
81 runHook preInstall
82
83 appdir=$out/share/emscripten
84 mkdir -p $appdir
85 cp -r . $appdir
86 chmod -R +w $appdir
87
88 mkdir -p $appdir/node_modules
89 cp -r ${nodeModules}/* $appdir/node_modules
90
91 mkdir -p $out/bin
92 for b in em++ em-config emar embuilder.py emcc emcmake emconfigure emmake emranlib emrun emscons emsize; do
93 makeWrapper $appdir/$b $out/bin/$b \
94 --set NODE_PATH ${nodeModules} \
95 --set EM_EXCLUSIVE_CACHE_ACCESS 1 \
96 --set PYTHON ${python3}/bin/python
97 done
98
99 # precompile libc (etc.) in all variants:
100 pushd $TMPDIR
101 echo 'int __main_argc_argv( int a, int b ) { return 42; }' >test.c
102 for LTO in -flto ""; do
103 for BIND in "" "--bind"; do
104 # starting with emscripten 3.1.32+,
105 # if pthreads and relocatable are both used,
106 # _emscripten_thread_exit_joinable must be exported
107 # (see https://github.com/emscripten-core/emscripten/pull/18376)
108 # TODO: get library cache to build with both enabled and function exported
109 $out/bin/emcc $LTO $BIND test.c
110 $out/bin/emcc $LTO $BIND -s RELOCATABLE test.c
111 $out/bin/emcc $LTO $BIND -s USE_PTHREADS test.c
112 done
113 done
114 popd
115
116 export PYTHON=${python3}/bin/python
117 export NODE_PATH=${nodeModules}
118 pushd $appdir
119 python test/runner.py test_hello_world
120 popd
121
122 runHook postInstall
123 '';
124
125 passthru = {
126 # HACK: Make emscripten look more like a cc-wrapper to GHC
127 # when building the javascript backend.
128 targetPrefix = "em";
129 bintools = emscripten;
130 };
131
132 meta = with lib; {
133 homepage = "https://github.com/emscripten-core/emscripten";
134 description = "An LLVM-to-JavaScript Compiler";
135 platforms = platforms.all;
136 maintainers = with maintainers; [ qknight matthewbauer raitobezarius ];
137 license = licenses.ncsa;
138 };
139}