MAINT: special: Add cxx flags hook for cxx ufuncs.
MAINT: special: Add cxx flags hook for cxx ufuncs.

ilayn/scipy,WarrenWeckesser/scipy,rgommers/scipy,endolith/scipy,rgommers/scipy,ilayn/scipy,vigna/scipy,zerothi/scipy,Stefan-Endres/scipy,zerothi/scipy,ilayn/scipy,andyfaff/scipy,mdhaber/scipy,anntzer/scipy,mdhaber/scipy,andyfaff/scipy,scipy/scipy,perimosocordiae/scipy,mdhaber/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,tylerjereddy/scipy,endolith/scipy,anntzer/scipy,WarrenWeckesser/scipy,zerothi/scipy,rgommers/scipy,ilayn/scipy,zerothi/scipy,scipy/scipy,tylerjereddy/scipy,vigna/scipy,ilayn/scipy,zerothi/scipy,anntzer/scipy,WarrenWeckesser/scipy,tylerjereddy/scipy,Stefan-Endres/scipy,anntzer/scipy,scipy/scipy,ilayn/scipy,andyfaff/scipy,WarrenWeckesser/scipy,andyfaff/scipy,perimosocordiae/scipy,scipy/scipy,rgommers/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,vigna/scipy,vigna/scipy,perimosocordiae/scipy,mdhaber/scipy,WarrenWeckesser/scipy,endolith/scipy,tylerjereddy/scipy,mdhaber/scipy,endolith/scipy,endolith/scipy,Stefan-Endres/scipy,scipy/scipy,scipy/scipy,anntzer/scipy,endolith/scipy,tylerjereddy/scipy,anntzer/scipy,rgommers/scipy,andyfaff/scipy,zerothi/scipy,perimosocordiae/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,mdhaber/scipy,andyfaff/scipy,vigna/scipy