The warning you quoted is just a warning.
The real problem is what comes after the warning:
:info:build gvrender_ming.c:94:50: error: unknown type name 'textpara_t'; did you mean 'textspan_t'?
:info:build static void ming_textpara(GVJ_t * job, pointf p, textpara_t * para)
:info:build ^~~~~~~~~~
:info:build textspan_t
:info:build ../../lib/common/textspan.h:63:7: note: 'textspan_t' declared here
:info:build } textspan_t;
:info:build ^
:info:build gvrender_ming.c:126:45: error: no member named 'fontsize' in 'textspan_t'
:info:build SWFTextField_setHeight(textfield, para->fontsize);
:info:build ~~~~ ^
:info:build gvrender_ming.c:133:20: error: no member named 'width' in 'textspan_t'
:info:build offset.x = -para->width;
:info:build ~~~~ ^
:info:build gvrender_ming.c:137:20: error: no member named 'width' in 'textspan_t'
:info:build offset.x = -para->width/2.;
:info:build ~~~~ ^
:info:build gvrender_ming.c:141:23: error: no member named 'height' in 'textspan_t'
:info:build offset.y = -para->height + para->fontsize*.4; /* empirically determined */
:info:build ~~~~ ^
:info:build gvrender_ming.c:141:38: error: no member named 'fontsize' in 'textspan_t'
:info:build offset.y = -para->height + para->fontsize*.4; /* empirically determined */
:info:build ~~~~ ^
:info:build 1 warning and 6 errors generated.
Confirmed with graphviz @2.36.0 and @2.37.20140201.0545.
I've reported it to the developers: http://www.graphviz.org/mantisbt/view.php?id=2420
