Workaround : Modify original lines 450 and 451 of the ./generic/tixGrSort.c file as below statements, then configure/make/make install again. 450 : // order = strtol(sortInterp->result, &end, 0); : order = strtol(TclGetStringResult(sortInterp), &end, 0); 451 : // if ((end == sortInterp->result) || (end != 0)) { : if ((end == TclGetStringResult(sortInterp)) || (end != 0)) { ...* Because there is a article in tcl.h file / ----------------------------------------------------------------------------...