Ubuntu ispc compile .so file fail

[DylanTao]

On my Ubuntu, all the parallel_add/copy/reduce tests will only produce a temporary file like "parallel_add.so.o", which will cause an error. However, it will pass all the parallel tests if I can target "c" in the hw3/test.py file, producing the parallel_add.so file. I suspect some additional compiler line or flag is needed, but I am not sure how to fix it.

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ERROR: test_parallel_add (main.Homework3Test.test_parallel_add)

Traceback (most recent call last):
File "/home/stao/dev/loma_public/hw_tests/hw3/test.py", line 405, in test_parallel_add
structs, lib = compiler.compile(f.read(),
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/stao/dev/loma_public/compiler.py", line 355, in compile
lib = CDLL(os.path.join(os.getcwd(), output_filename))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/stao/anaconda3/envs/loma/lib/python3.11/ctypes/init.py", line 376, in init
self._handle = _dlopen(self._name, mode)
^^^^^^^^^^^^^^^^^^^^^^^^^
OSError: /home/stao/dev/loma_public/hw_tests/hw3/_code/parallel_add.so: cannot open shared object file: No such file or directory

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