freebsd-dev/contrib/bind/port/settings

#!/bin/sh

# this process is necessary because make(1) puts its command line into
# the environment, and when we exec a sub-make we need these command
# line settings (like CDEBUG=-g for example) to override what we get out
# of port/$systype/Makefile.set.  therefore feed Makefile.set to this
# and it will merge things appropriately.  a cache file is maintained
# to avoid calling this script way too often.

cachefile=${1-//}
if [ -f "$cachefile" ]; then
	echo "Using $cachefile" >&2
	exec cat $cachefile
fi

case $cachefile in
//) ;;
*)   echo "Making $cachefile" >&2 ;;
esac

# expr is sensitive to LC_COLLATE settings.  We want 'C'.
LC_COLLATE=C
export LC_COLLATE

result=''
while read setting; do
	var=`expr "$setting" : "'\([A-Z0-9_]*\)="`
	val=`expr "$setting" : "'[A-Z0-9_]*=\([^']*\)'\$"`
	eval "env=`echo \\${\$var-'$val'}`"
	result="$result '$var=$env'"
done

case $cachefile in
//) echo $result ;;
*)  echo $result > $cachefile
    exec cat $cachefile ;;
esac

exit