Use pycompilation if installed.

[moorepants]

No description provided.

[moorepants]

The pycompilation caching seems to work. On the problem in https://github.com/brocksam/muscle-driven-bicycle-paper if I run the optimal control script twice in a row, the second run takes no time for the compilation step taking total time to instantiate the problem from 180 seconds to 54 seconds (approximately).

I did notice that if I open IPython and run the script twice in a row that the cached compilation did not seem to load (always took 180 seconds to complete). Not sure why.

[moorepants]

To clarify:

python ocp.py
python ocp.py

shows the speed up on the second run but:

$ ipython
run ocp.py
run ocp.py

didn't.

[moorepants]

Bjorn pointed out to me that a version of pycompilation is in sympy/utilities/_compilation.

I have it working but I don't know if it caches the compiled code.

[moorepants]

In the sympy version the import_module_from_file has a kwarg only_if_newer_than. It may be a way to import an old complied version if some dependent files haven't changed.

[moorepants]

SymPy includes pycompilation (private modules), so we could just use it from SymPy instead of the standalone package.

[moorepants]

The SymPy _compilation code states it isn't tested on windows and mac, so that would need to be addressed in SymPy before we add compatibility.

[moorepants]

On ubuntu:

>           raise CompileError(msg)
E           sympy.utilities._compilation.util.CompileError: Error executing '/usr/bin/gcc -fPIC -c -std=c99 -o ./ufuncify_matrix_0_c.o -I/home/runner/miniconda3/envs/test/lib/python3.10/site-packages/numpy/_core/include /tmp/tmp04ldk09c.opty_ufuncify_compile/ufuncify_matrix_0_c.c' in /tmp/tmp04ldk09c.opty_ufuncify_compile (exited status 1):
E            /tmp/tmp04ldk09c.opty_ufuncify_compile/ufuncify_matrix_0_c.c: In function ‘eval_matrix’:
E           /tmp/tmp04ldk09c.opty_ufuncify_compile/ufuncify_matrix_0_c.c:11:30: error: ‘M_PI’ undeclared (first use in this function)
E              11 |     matrix[0] = z_0_*pow(cos(M_PI*b_), if__);
E                 |                              ^~~~
E           /tmp/tmp04ldk09c.opty_ufuncify_compile/ufuncify_matrix_0_c.c:11:30: note: each undeclared identifier is reported only once for each function it appears in

[moorepants]

On mac intel:

Fatal Python error: Segmentation fault

[moorepants]

On mac arm:

Fatal Python error: Segmentation fault

[moorepants]

On windows many compile errors:

>           raise CompileError(msg)
E           sympy.utilities._compilation.util.CompileError: Error executing 'C:\mingw64\bin\gcc.EXE -fPIC -c -std=c99 -o .\ufuncify_matrix_0_c.obj -IC:\Users\runneradmin\miniconda3\envs\test\Lib\site-packages\numpy\_core\include C:\Users\RUNNER~1\AppData\Local\Temp\tmpae_469o4.opty_ufuncify_compile\ufuncify_matrix_0_c.c' in C:\Users\RUNNER~1\AppData\Local\Temp\tmpae_469o4.opty_ufuncify_compile (exited status 1):

C:\Users\runneradmin\miniconda3\envs\test\Lib\site-packages\sympy\utilities\_compilation\runners.py:209: CompileError

[moorepants]

Windows fails with:

E           sympy.utilities._compilation.util.CompileError: Error executing 'C:\mingw64\bin\gcc.EXE -fPIC -c -std=gnu99 -o .\ufuncify_matrix_0_c.obj -IC:\Users\runneradmin\miniconda3\envs\test\Lib\site-packages\numpy\_core\include C:\Users\RUNNER~1\AppData\Local\Temp\tmpqwti7lz2.opty_ufuncify_compile\ufuncify_matrix_0_c.c' in C:\Users\RUNNER~1\AppData\Local\Temp\tmpqwti7lz2.opty_ufuncify_compile (exited status 1):

it is trying to run gcc via mingw

[moorepants]

On mac with clang the -c flag is added but clang says you can't use c++11 with -c. In sympy it seems this -c is always added:

        if self.run_linker:
            # both gnu and intel compilers use '-c' for disabling linker
            self.flags = list(filter(lambda x: x != '-c', self.flags))
        else:
            if '-c' not in self.flags:
                self.flags.append('-c')

[moorepants]

The preferred_vendor is picked up from env var SYMPY_COMPILER_VENDOR or set to gnu. The options are intel, llvm, gnu.