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9front supports #pragma once now

--- a/make-plan9.rc

+++ b/make-plan9.rc

@@ -1,19 +1,6 @@

 #!/bin/rc

 rfork ne

-fn pragma_once {

-	h=_^`"{echo $1 | sed 's,.*/,,g;s/\..*//g' | tr -d '

-'}^_h_

-	sed 's/#pragma once/#ifndef '^$h^'\n#define '^$h^'/g' $1 && echo && echo '#endif'

-}

-

-for(f in src/*.h src/*/*.h){

-	grep -s '^#pragma[ 	]+once' $f && {

-		pragma_once $f >$f.p

-		mv $f.p $f

-	}

-}

-

 fn pragma_pack {

 	sed 's/#pragma[ 	]+pack[ 	(]*(push|1)[ 	)]*/#pragma pack on/g

 s/#pragma[ 	]+pack[ 	(]*(pop|0)[ 	)]*/#pragma pack off/g