Add find_typedef comments for Linux.

Author: bmomjian

src/tools/find_typedef

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# $PostgreSQL: pgsql/src/tools/find_typedef,v 1.10 2008/03/18 23:04:34 momjian Exp $
+# $PostgreSQL: pgsql/src/tools/find_typedef,v 1.11 2008/03/18 23:23:08 momjian Exp $
 
 # This script attempts to find all typedef's in the postgres binaries
 # by using 'nm' to report all typedef debugging symbols.
@@ -39,7 +39,11 @@ for DIR
 do	# if objdump -W is recognized, only one line of error should appear
 	if [ `objdump -W 2>&1 | wc -l` -eq 1 ]
 	then	# Linux
-		# unfortunately the Linux version doesn't show unreferenced typedefs
+		# Unfortunately the Linux version doesn't show unreferenced typedefs.
+		# The problem is that they are still in the source code so should be
+		# indented properly.  However, I think pgindent only cares about
+		# the typedef references, not the definitions, so I think it might
+		# be fine
 		objdump -W "$DIR"/* |
 		egrep -A3 '(DW_TAG_typedef|DW_TAG_structure_type|DW_TAG_union_type)' |
 		awk ' $2 == "DW_AT_name" {print $NF}'