I'm trying to compile python source code foo.py to C using cython.
In foo.py:
print "Hello World"
The command I'm running is cython foo.py.
The problem is that when compiling foo.c using gcc, I get the error:
undefined reference to 'main'.
when converting the code from python to c (using Cython) it converts it to c code which can be compiled into a shared object.
in order to make it executable, you should add "--embed" to cython conversion command. this flag adds the 'main' function you need, so you could compile the c code into executable file.
please notice you'll need the python .so runtime libraries in order to run the exec.
Read the Cython documentation. This will also (hopefully) teach you what Cython is and what it isn't. Cython is for creating python extensions (not a general-purpose Python-to-C-compiler), which are shared objects/dlls. Dynamically loaded libraries don't have a main function like standalone programs, but compilers assume that they are ultimately linking an executable. You have to tell them otherwise via flags (-shared methinks, but again, refer to the Cython documentation) - or even better, don't compile yourself, use a setup.py for this (yet again, read the Cython documentation).
The usual way is to use distutils to compile the cython-generated file. This also gives you all the include directories you need in a portable way.
