../../../../ext/mathematical/mathematical.c:104:5: error: implicit declaration
of function 'mtex2MML_free_string' is invalid in C99
[-Werror,-Wimplicit-function-declaration]
mtex2MML_free_string(mathml);
^
../../../../ext/mathematical/mathematical.c:104:5: note: did you mean
'itex2MML_free_string'?
../../../../ext/mathematical/lasem_overrides.h:12:6: note:
'itex2MML_free_string' declared here
void itex2MML_free_string (char * str);
^
I got this error when building: