diff --git a/qpms/qpms_specfunc.h b/qpms/qpms_specfunc.h
index 8771339..3a82d67 100644
--- a/qpms/qpms_specfunc.h
+++ b/qpms/qpms_specfunc.h
@@ -18,7 +18,7 @@ typedef struct {
 	//complex double *bkn; // coefficients of the derivatives
 } qpms_sbessel_calculator_t;
 
-qpms_sbessel_calculator_t *qpms_sbessel_calculator_init();
+qpms_sbessel_calculator_t *qpms_sbessel_calculator_init(void);
 void qpms_sbessel_calculator_pfree(qpms_sbessel_calculator_t *c);
 
 qpms_errno_t qpms_sbessel_calc_fill(qpms_sbessel_calculator_t *c, qpms_bessel_t typ, qpms_l_t lmax,
diff --git a/qpms/scatsystem.c b/qpms/scatsystem.c
index 3056b6f..48ef24e 100644
--- a/qpms/scatsystem.c
+++ b/qpms/scatsystem.c
@@ -210,8 +210,8 @@ qpms_tmatrix_interpolator_t *qpms_tmatrix_interpolator_create(const size_t incou
       bool n0_real = false, n0_imag = false;
       for (size_t i = 0; i < incount; ++i) {
         complex double telem = ta[i].m[n * row + col];
-        if (y_real[i] = creal(telem)) n0_real = true;
-        if (y_imag[i] = cimag(telem)) n0_imag = true;
+        if ((y_real[i] = creal(telem))) n0_real = true;
+        if ((y_imag[i] = cimag(telem))) n0_imag = true;
       }
       if (n0_real) {
         gsl_spline *s =
@@ -467,8 +467,8 @@ qpms_scatsys_t *qpms_scatsys_apply_symmetry(const qpms_scatsys_t *orig, const qp
     ptrdiff_t shift = ss->otspace - old_otspace;
     if(shift)
       for (size_t oi = 0; oi < ss->orbit_type_count; ++oi) {
-        (char *) (ss->orbit_types[i].action) += shift;
-        (char *) (ss->orbit_types[i].tmatrices) += shift;
+        ss->orbit_types[oi].action = (void *)(((char *) (ss->orbit_types[oi].action)) + shift);
+        ss->orbit_types[oi].tmatrices = (void *)(((char *) (ss->orbit_types[oi].tmatrices)) + shift);
       }
   }
 
diff --git a/qpms/vswf.c b/qpms/vswf.c
index e853d19..862b756 100644
--- a/qpms/vswf.c
+++ b/qpms/vswf.c
@@ -61,10 +61,10 @@ bool qpms_vswf_set_spec_isidentical(const qpms_vswf_set_spec_t *a,
 
 qpms_vswf_set_spec_t *qpms_vswf_set_spec_copy(const qpms_vswf_set_spec_t *or){
   qpms_vswf_set_spec_t *c = malloc(sizeof(qpms_vswf_set_spec_t));
-  if (!c) abort; // return NULL
+  if (!c) abort(); // return NULL
   *c = *or;
   c->ilist = malloc(sizeof(qpms_uvswfi_t) * c->n);
-  memcpy(c->ilist, or->ilist, sizeof(qpms_vswfi_t)*c->n);
+  memcpy(c->ilist, or->ilist, sizeof(qpms_uvswfi_t)*c->n);
   c->capacity = c->n;
   return c;
 }
@@ -208,7 +208,7 @@ qpms_errno_t qpms_vswf_fill_alternative(csphvec_t *const longtarget, csphvec_t *
     complex double besderfac = *(pbes-1) - l * besfac;
     double sqrtlfac = sqrt(l*(l+1));
     for(qpms_m_t m = -l; m <= l; ++m) {
-      complex double eimf = cexp(m * kr.phi * I);
+      complex double eimf = cexp(m * kr.phi * I); // FIXME unused variable?!!!
       if (longtarget) {
         *plong = csphvec_add(csphvec_scale(besderfac-besfac, *p3),
             csphvec_scale(sqrtlfac * besfac, *p2));
diff --git a/qpms/vswf.h b/qpms/vswf.h
index 5c74ca0..ba22b3a 100644
--- a/qpms/vswf.h
+++ b/qpms/vswf.h
@@ -12,7 +12,7 @@
 
 // Methods for qpms_vswf_spec_t
 /// Creates a qpms_vswf_set_spec_t structure with an empty list of wave indices.
-qpms_vswf_set_spec_t *qpms_vswf_set_spec_init();
+qpms_vswf_set_spec_t *qpms_vswf_set_spec_init(void);
 /// Appends a VSWF index to a \ref qpms_vswf_set_spec_t, also updating metadata.
 qpms_errno_t qpms_vswf_set_spec_append(qpms_vswf_set_spec_t *self, qpms_uvswfi_t u);
 /// Destroys a \ref qpms_vswf_set_spec_t.
diff --git a/setup.py b/setup.py
index c82db35..a8a26dc 100755
--- a/setup.py
+++ b/setup.py
@@ -23,7 +23,10 @@ qpms_c = Extension('qpms_c',
             # FIXME http://stackoverflow.com/questions/4259170/python-setup-script-extensions-how-do-you-include-a-h-file
             'qpms/translations.c',
             'qpms/symmetries.c',
-            'qpms/wigner.c'],
+            'qpms/wigner.c',
+            'qpms/scatsystem.c',
+            'qpms/vswf.c', # FIXME many things from vswf.c are not required by this module, but they have many dependencies (following in this list); maybe I want to move all the  "basespec stuff"
+            'qpms/legendre.c'],
         extra_compile_args=['-std=c99','-ggdb', '-O0',
             '-DQPMS_COMPILE_PYTHON_EXTENSIONS', # this is required
             #'-DQPMS_USE_OMP',