fix(core): look for emcc instead of emcc.py

`emcc.py` is not marked as executable in emcripten's git repo so the
build failed when trying to locatge emscripten. However, it turns out
that `emcc` is marked as executable, so we use that instead.

core/wasm.build.linux.in

@@ -1,4 +1,4 @@
 [binaries]
-c = ['$EMSCRIPTEN_BASE/emcc.py']
-cpp = ['$EMSCRIPTEN_BASE/em++.py']
-ar = ['$EMSCRIPTEN_BASE/emar.py']
+c = ['$EMSCRIPTEN_BASE/emcc']
+cpp = ['$EMSCRIPTEN_BASE/em++']
+ar = ['$EMSCRIPTEN_BASE/emar']

core/wasm.build.mac.in

@@ -1,4 +1,4 @@
 [binaries]
-c = ['$EMSCRIPTEN_BASE/emcc.py']
-cpp = ['$EMSCRIPTEN_BASE/em++.py']
-ar = ['$EMSCRIPTEN_BASE/emar.py']
+c = ['$EMSCRIPTEN_BASE/emcc']
+cpp = ['$EMSCRIPTEN_BASE/em++']
+ar = ['$EMSCRIPTEN_BASE/emar']

core/wasm.build.win.in

@@ -1,6 +1,6 @@
 [binaries]
-c = ['python.exe', '$EMSCRIPTEN_BASE/emcc.py']
-cpp = ['python.exe', '$EMSCRIPTEN_BASE/em++.py']
-ar = ['python.exe', '$EMSCRIPTEN_BASE/emar.py']
+c = ['python.exe', '$EMSCRIPTEN_BASE/emcc']
+cpp = ['python.exe', '$EMSCRIPTEN_BASE/em++']
+ar = ['python.exe', '$EMSCRIPTEN_BASE/emar']
 
 [properties]

core/wasm.defs.build

@@ -1,7 +1,7 @@
 [binaries]
-c = ['emcc.py']
-cpp = ['em++.py']
-ar = ['emar.py']
+c = ['emcc']
+cpp = ['em++']
+ar = ['emar']
 exe_wrapper = 'node'
 
 [properties]

resources/locate_emscripten.inc.sh

@@ -2,30 +2,30 @@
 # no hashbang for .inc.sh
 
 #
-# We don't want to rely on emcc.py being on the path, because Emscripten puts far
+# We don't want to rely on emcc being on the path, because Emscripten puts far
 # too many things onto the path (in particular for us, node).
 #
-# The following comment suggests that we don't need emcc.py on the path.
+# The following comment suggests that we don't need emcc on the path.
 # https://github.com/emscripten-core/emscripten/issues/4848#issuecomment-1097357775
 #
-# So we try and locate emcc.py in common locations ourselves. The search pattern
+# So we try and locate emcc in common locations ourselves. The search pattern
 # is:
 #
 # 1. Look for $EMSCRIPTEN_BASE (our primary emscripten variable), which should
-#    point to the folder that emcc.py is located in
-# 2. Look for $EMCC which should point to the emcc.py executable
-# 3. Look for emcc.py on the path
+#    point to the folder that emcc is located in
+# 2. Look for $EMCC which should point to the emcc executable
+# 3. Look for emcc on the path
 #
 locate_emscripten() {
   if [[ -z ${EMSCRIPTEN_BASE+x} ]]; then
     if [[ -z ${EMCC+x} ]]; then
-      local EMCC=`which emcc.py`
-      [[ -z $EMCC ]] && builder_die "locate_emscripten: Could not locate emscripten (emcc.py) on the path or with \$EMCC or \$EMSCRIPTEN_BASE"
+      local EMCC=`which emcc`
+      [[ -z $EMCC ]] && builder_die "locate_emscripten: Could not locate emscripten (emcc) on the path or with \$EMCC or \$EMSCRIPTEN_BASE"
     fi
-    [[ -f $EMCC && ! -x $EMCC ]] && builder_die "locate_emscripten: Variable EMCC ($EMCC) points to emcc.py but it is not executable"
-    [[ -x $EMCC ]] || builder_die "locate_emscripten: Variable EMCC ($EMCC) does not point to a valid executable emcc.py"
+    [[ -f $EMCC && ! -x $EMCC ]] && builder_die "locate_emscripten: Variable EMCC ($EMCC) points to emcc but it is not executable"
+    [[ -x $EMCC ]] || builder_die "locate_emscripten: Variable EMCC ($EMCC) does not point to a valid executable emcc"
     EMSCRIPTEN_BASE="$(dirname "$EMCC")"
   fi
-  [[ -f ${EMSCRIPTEN_BASE}/emcc.py && ! -x ${EMSCRIPTEN_BASE}/emcc.py ]] && builder_die "locate_emscripten: Variable EMSCRIPTEN_BASE ($EMSCRIPTEN_BASE) contains emcc.py but it is not executable"
-  [[ -x ${EMSCRIPTEN_BASE}/emcc.py ]] || builder_die "locate_emscripten: Variable EMSCRIPTEN_BASE ($EMSCRIPTEN_BASE) does not point to emcc.py's folder"
+  [[ -f ${EMSCRIPTEN_BASE}/emcc && ! -x ${EMSCRIPTEN_BASE}/emcc ]] && builder_die "locate_emscripten: Variable EMSCRIPTEN_BASE ($EMSCRIPTEN_BASE) contains emcc but it is not executable"
+  [[ -x ${EMSCRIPTEN_BASE}/emcc ]] || builder_die "locate_emscripten: Variable EMSCRIPTEN_BASE ($EMSCRIPTEN_BASE) does not point to emcc's folder"
 }