In order to move from mingw/msvc to tinycc, need to convert sascalc/calculator/c_extensions/sldi from C++ to C. This should be a simple operation since it doesn't make use of significant C++ features.

When trying to compile models from marketplce numerous erros pop up related orientation/magnetism. This probably has something to do with recent orientation branch pushed to sasmodels. I've basically downloaded cylinder model from marketplace changed its name to marketplace_cylinder (also in python file where its pointing to c file) and run it from sasview as plugin model. One can probably do the same with sascomp.

Error message is long, so posting just a part of it

Traceback (most recent call last):
  File "/Users/wojciechpotrzebowski/SASVIEW_WORKSPACE/sasview/src/sas/sascalc/data_util/calcthread.py", line 274, in _run
    self.compute(*args, **kwargs)
RuntimeError: compile failed.
cc -shared -fPIC -std=c99 -O2 -Wall /var/folders/8c/pd135bx14f3_7xbhfxmkrcdx1ksm4c/T/sas64_marketplace_cylinder_qmYBBF.c -o /var/folders/8c/pd135bx14f3_7xbhfxmkrcdx1ksm4c/T/sas64_marketplace_cylinder.so -lm
/Users/wojciechpotrzebowski/.sasview/plugin_models/marketplace_cylinder.c:61:5: warning: implicit declaration of function 'ORIENT_SYMMETRIC' is invalid in C99 [-Wimplicit-function-declaration]
    ORIENT_SYMMETRIC(qx, qy, theta, phi, q, sin_alpha, cos_alpha);
    ^

/Users/wojciechpotrzebowski/.sasview/plugin_models/marketplace_cylinder.c:61:42: warning: variable 'q' is uninitialized when used here [-Wuninitialized]
    ORIENT_SYMMETRIC(qx, qy, theta, phi, q, sin_alpha, cos_alpha);
                                         ^
/Users/wojciechpotrzebowski/.sasview/plugin_models/marketplace_cylinder.c:60:13: note: initialize the variable 'q' to silence this warning
    double q, sin_alpha, cos_alpha;
            ^
             = 0.0
/Users/wojciechpotrzebowski/.sasview/plugin_models/marketplace_cylinder.c:61:45: warning: variable 'sin_alpha' is uninitialized when used here [-Wuninitialized]
    ORIENT_SYMMETRIC(qx, qy, theta, phi, q, sin_alpha, cos_alpha);
                                            ^~~~~~~~~
/Users/wojciechpotrzebowski/.sasview/plugin_models/marketplace_cylinder.c:60:24: note: initialize the variable 'sin_alpha' to silence this warning
    double q, sin_alpha, cos_alpha;
                       ^
                        = 0.0
/Users/wojciechpotrzebowski/.sasview/plugin_models/marketplace_cylinder.c:61:56: warning: variable 'cos_alpha' is uninitialized when used here [-Wuninitialized]
    ORIENT_SYMMETRIC(qx, qy, theta, phi, q, sin_alpha, cos_alpha);
                                                       ^~~~~~~~~
/Users/wojciechpotrzebowski/.sasview/plugin_models/marketplace_cylinder.c:60:35: note: initialize the variable 'cos_alpha' to silence this warning
    double q, sin_alpha, cos_alpha;
                                  ^
                                   = 0.0

It probably also applies to old plugin models. It also seems that dummy Iqxy shouldn't be included in models as they fail to compile too. We probably need to provide a patch for old/marketplace models.

Many polymer models use the incomplete gamma function in their implementation (polymer_excl_volume and others). Mike Hore is writing a handful of similar models and thinks he would see a speed increase by using OpenCL.