Add a more explicit message when the compiler set by CC cannot be found or executed.
Add a more explicit message when the compiler set by CC cannot be found or executed.
aleksandr-bakanov/astropy,tbabej/astropy,tbabej/astropy,astropy/astropy,tbabej/astropy,funbaker/astropy,dhomeier/astropy,joergdietrich/astropy,saimn/astropy,kelle/astropy,pllim/astropy,kelle/astropy,dhomeier/astropy,larrybradley/astropy,AustereCuriosity/astropy,lpsinger/astropy,AustereCuriosity/astropy,astropy/astropy,dhomeier/astropy,mhvk/astropy,lpsinger/astropy,stargaser/astropy,dhomeier/astropy,bsipocz/astropy,bsipocz/astropy,lpsinger/astropy,larrybradley/astropy,StuartLittlefair/astropy,pllim/astropy,DougBurke/astropy,DougBurke/astropy,lpsinger/astropy,stargaser/astropy,funbaker/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,DougBurke/astropy,joergdietrich/astropy,tbabej/astropy,StuartLittlefair/astropy,astropy/astropy,funbaker/astropy,saimn/astropy,kelle/astropy,mhvk/astropy,bsipocz/astropy,kelle/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,lpsinger/astropy,StuartLittlefair/astropy,joergdietrich/astropy,MSeifert04/astropy,tbabej/astropy,StuartLittlefair/astropy,dhomeier/astropy,mhvk/astropy,astropy/astropy,kelle/astropy,larrybradley/astropy,DougBurke/astropy,pllim/astropy,saimn/astropy,saimn/astropy,joergdietrich/astropy,StuartLittlefair/astropy,stargaser/astropy,MSeifert04/astropy,pllim/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,stargaser/astropy,mhvk/astropy,joergdietrich/astropy,larrybradley/astropy,astropy/astropy,mhvk/astropy,AustereCuriosity/astropy,saimn/astropy,AustereCuriosity/astropy,pllim/astropy,larrybradley/astropy,funbaker/astropy,AustereCuriosity/astropy