Try emcc monkey patch

recipes/recipes_emscripten/h5py/build.sh

@@ -1,5 +1,14 @@
 #!/bin/bash
 
+# remove the emcc symlink in the $BUILD_PREFIX/bin
+rm $BUILD_PREFIX/bin/emcc
+
+# make callable
+chmod +x $RECIPE_DIR/emcc_wrapper.sh
+
+# create symlink to $RECIPE_DIR/emcc_wrapper.sh 
+ln -s $RECIPE_DIR/emcc_wrapper.sh $BUILD_PREFIX/bin/emcc
+
 export HDF5_DIR=${PREFIX}
 
 # tell setup.py to not 'pip install' exact package requirements

recipes/recipes_emscripten/h5py/emcc_wrapper.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+
+$BUILD_PREFIX/bin/python3 $RECIPE_DIR/py_emcc_wrapper.py $BUILD_PREFIX/opt/emsdk/upstream/emscripten/emcc  "$@"
+exit $?

recipes/recipes_emscripten/h5py/py_emcc_wrapper.py

@@ -0,0 +1,16 @@
+import sys
+import subprocess
+
+if __name__ == "__main__":
+
+    args = sys.argv[2:]
+
+    filtered_args = []
+    for arg in args:
+        if ("-Wl,-R$PREFIX/lib" in arg) or ("-R" in arg):
+            print("removed arg:", arg)
+        else:
+            filtered_args.append(arg)
+
+    # run the actual command in argv[1]
+    subprocess.run([sys.argv[1]] + filtered_args, check=True)