1 files changed, 45 insertions, 0 deletions
diff --git a/tools/javascript.py b/tools/javascript.py
new file mode 100644
index 0000000..5a93584
--- /dev/null
+++ b/tools/javascript.py
@@ -0,0 +1,45 @@
+import os
+
+
+def exists(env):
+    return "EM_CONFIG" in os.environ
+
+
+def generate(env):
+    if env["arch"] not in ("wasm32"):
+        print("Only wasm32 supported on web. Exiting.")
+        Exit()
+
+    if "EM_CONFIG" in os.environ:
+        env["ENV"] = os.environ
+
+    env["CC"] = "emcc"
+    env["CXX"] = "em++"
+    env["AR"] = "emar"
+    env["RANLIB"] = "emranlib"
+    env.Append(CPPFLAGS=["-s", "SIDE_MODULE=1"])
+    env.Append(LINKFLAGS=["-s", "SIDE_MODULE=1"])
+    env["SHOBJSUFFIX"] = ".bc"
+    env["SHLIBSUFFIX"] = ".wasm"
+    # Use TempFileMunge since some AR invocations are too long for cmd.exe.
+    # Use POSIX-style paths, required with TempFileMunge.
+    env["ARCOM_POSIX"] = env["ARCOM"].replace("$TARGET", "$TARGET.posix").replace("$SOURCES", "$SOURCES.posix")
+    env["ARCOM"] = "${TEMPFILE(ARCOM_POSIX)}"
+
+    # All intermediate files are just LLVM bitcode.
+    env["OBJPREFIX"] = ""
+    env["OBJSUFFIX"] = ".bc"
+    env["PROGPREFIX"] = ""
+    # Program() output consists of multiple files, so specify suffixes manually at builder.
+    env["PROGSUFFIX"] = ""
+    env["LIBPREFIX"] = "lib"
+    env["LIBSUFFIX"] = ".a"
+    env["LIBPREFIXES"] = ["$LIBPREFIX"]
+    env["LIBSUFFIXES"] = ["$LIBSUFFIX"]
+    env.Replace(SHLINKFLAGS="$LINKFLAGS")
+    env.Replace(SHLINKFLAGS="$LINKFLAGS")
+
+    if env["target"] == "debug":
+        env.Append(CCFLAGS=["-O0", "-g"])
+    elif env["target"] == "release":
+        env.Append(CCFLAGS=["-O3"])