Making all in widget
  CC    button.o
In file included from ../../../src/opengl.h:15,
                 from ../../../src/font.h:11,
                 from ../../../src/tk/widget/text.h:11,
                 from ../../../src/tk/widget.h:12,
                 from ../../../src/tk/toolkit_priv.h:14,
                 from button.c:12:
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:68:78: error: expected ')' before '*' token
   68 | void APIENTRY gluQuadricCallback(GLUquadric *qobj,GLenum which,void (CALLBACK *fn)());
      |                                                                              ^~
      |                                                                              )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:78:78: error: expected ')' before '*' token
   78 | void APIENTRY gluTessCallback(GLUtesselator *tess,GLenum which,void (CALLBACK *fn)());
      |                                                                              ^~
      |                                                                              )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:94:74: error: expected ')' before '*' token
   94 | void APIENTRY gluNurbsCallback(GLUnurbs *nobj,GLenum which,void (CALLBACK *fn)());
      |                                                                          ^~
      |                                                                          )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:96:23: error: expected ')' before '*' token
   96 | typedef void (CALLBACK *GLUquadricErrorProc)(GLenum);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:97:23: error: expected ')' before '*' token
   97 | typedef void (CALLBACK *GLUtessBeginProc)(GLenum);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:98:23: error: expected ')' before '*' token
   98 | typedef void (CALLBACK *GLUtessEdgeFlagProc) (GLboolean);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:99:23: error: expected ')' before '*' token
   99 | typedef void (CALLBACK *GLUtessVertexProc)(void *);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:100:23: error: expected ')' before '*' token
  100 | typedef void (CALLBACK *GLUtessEndProc)(void);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:101:23: error: expected ')' before '*' token
  101 | typedef void (CALLBACK *GLUtessErrorProc)(GLenum);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:102:23: error: expected ')' before '*' token
  102 | typedef void (CALLBACK *GLUtessCombineProc)(GLdouble[3],void*[4],GLfloat[4],void**);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:103:23: error: expected ')' before '*' token
  103 | typedef void (CALLBACK *GLUtessBeginDataProc)(GLenum,void *);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:104:23: error: expected ')' before '*' token
  104 | typedef void (CALLBACK *GLUtessEdgeFlagDataProc) (GLboolean,void *);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:105:23: error: expected ')' before '*' token
  105 | typedef void (CALLBACK *GLUtessVertexDataProc)(void *,void *);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:106:23: error: expected ')' before '*' token
  106 | typedef void (CALLBACK *GLUtessEndDataProc)(void *);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:107:23: error: expected ')' before '*' token
  107 | typedef void (CALLBACK *GLUtessErrorDataProc)(GLenum,void *);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:108:23: error: expected ')' before '*' token
  108 | typedef void (CALLBACK *GLUtessCombineDataProc)(GLdouble[3],void*[4],GLfloat[4],void**,void*);
      |                       ^~
      |                       )
C:/Programs/msys64/mingw64/x86_64-w64-mingw32/include/GL/glu.h:109:23: error: expected ')' before '*' token
  109 | typedef void (CALLBACK *GLUnurbsErrorProc)(GLenum);
      |                       ^~
      |                       )
make[4]: *** [Makefile:373: button.o] Error 1
make[3]: *** [Makefile:351: all-recursive] Error 1
make[2]: *** [Makefile:1020: all-recursive] Error 1
make[1]: *** [Makefile:731: all] Error 2
make: *** [Makefile:572: all-recursive] Error 1