Your package ngspice failed to build from source in current rawhide.
For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 908688 [details]
Patch for rawhide
Initial problem was specifying tclConfig.sh in %_libdir/tcl8.5 while rawhide now has 8.6. However, tclConfig.sh has (also) been in %_libdir since July 2008, so this hack can just be dropped.
Once that is out of the way, compiling then fails due to direct accesses of Tcl_Interp->result which are deprecated in tcl8.6 but cannot (AFAICS) be replaced by Tcl_SetResult() calls.
Patch for rawhide attached.