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Improve test script in cc1

This version has less escape hell problems and it enables warnings
in cc1.

--- a/cc1/tests/chktest.sh

+++ b/cc1/tests/chktest.sh

@@ -1,25 +1,31 @@

 #!/bin/sh

-out=/tmp/out

-chk=/tmp/chk

+out=/tmp/$$.out

+chk=/tmp/$$.chk

-#trap "rm -f $out $chk" EXIT INT QUIT

+trap "rm -f $out $chk" EXIT INT QUIT HUP

 for i in *.c

 do

-	rm -f $out $chk

 	awk '

-	/^name:/                  {printf "Running %s ", $2}

-	/^output:$/               {copyon=1}

-	/^\*/                     {copyon=0}

-	copyon==1 && !/^output:$/ {print $0 >> "'$chk'"}

-	' $i

-

-	../cc1 $i > $out 2>&1

-  	if cmp $out $chk >/dev/null 2>&1

-  	then

-   		echo [OK]

-  	else

-  		echo [FAILED]

- 	fi

+	BEGIN {

+		out="'$out'";chk="'$chk'"

+		system("rm -f " out " " chk)

+	}

+	/^name:/ {

+		printf "Running %s ", $2

+	}

+	/^output:$/ {

+		copyon=1

+	}

+	/^\*/  {

+		copyon=0

+	}

+	copyon==1 && !/^output:$/  {

+		print $0 >> chk

+	}

+	END {

+		system("../cc1 -w '$i' > " out " 2>&1")

+		print system("cmp -s " out " " chk) ? "[FAILED]" : "[OK]"

+	}' $i

 done