#!/bin/sh test "$frontend" || frontend=pfxc	#default if test "x$objtype" = x; then	echo "$frontend: Please set the \`objtype'." >&2	exit 2fitest -f $PF9/$objtype/config && . $PF9/$objtype/config . $PF9/linux/bin/9c_opts.sh usegcc(){	cc=${TOOLPFX}gcc	ngflags=-c		# switch off optimization due to problems with *jmp functions	#opti=false 	if $opti; then		ngflags="-O2 $ngflags"	fi	if $warn; then		ngflags="$ngflags \			-Wall \			-Wno-parentheses \			-Wno-missing-braces \			-Wno-switch \			-Wno-comment \			-Wno-sign-compare \			-Wno-unknown-pragmas \		"	fi	ngflags="$ngflags \		-fno-omit-frame-pointer \	"	# want to put -fno-optimize-sibling-calls here but	# that option only works with gcc3+ it seems	cflags="$ngflags -ggdb"} # always using gccusegcc if test "x$srcs" = x; then	echo "$frontend: No input files." >&2	exit 1fi for src in $srcs; do	if test -z "$outfile"; then		outfile=`echo $src | sed 's,[^/]*/,,g;s,[.]c$,,'`.$O	fi 	if $avoid_outfile; then		outopt=	else		outopt="-o $outfile"	fi 	# N.B. Must use temp file to avoid pipe; pipe loses status.	# The uniq at the end is for gcc's strcmp/etc. built-in nonsense,	# which multiplies single errors as a result of its expansion.	xtmp=/tmp/9c.$$.$USER.out	case $objtype in	mingw)		$cc $outopt -DPLAN9PORT -DPF9 -I$PF9/$objtype/include -I$PF9/include $cflags $opts $src 2>$xtmp		status=$?		;;	cygwin)		$cc $outopt -DPLAN9PORT -mcygwin -D__CYGWIN__ -DPF9 -nostdinc -I$MSYSgcclib/include -I$PF9/$objtype/include -I$PF9/sys/include -I$MSYSdir/include $cflags $opts $src 2>$xtmp		status=$?		;;	esac	grep -v '__p9l_autolib_' $xtmp |	egrep -v ': error: .Each undeclared identifier|: error: for each function it appears|is dangerous, better use|is almost always misused|: In function |: At top level:|support .long long.|In file included from|        from|use of C99 long long|ISO C forbids conversion|warn_unused_result' |	sed 's/ .first use in this function.$//; s/\"\([^\"][^\"]*\)\", line \([0-9][0-9]*\)/\1:\2/g' |	uniq 1>&2	rm -f $xtmp $xtmp.status	exit $statusdone