Index: inc_weed_out.sh
===================================================================
--- inc_weed_out.sh	(nonexistent)
+++ inc_weed_out.sh	(revision 1843)
@@ -0,0 +1,91 @@
+#!/bin/sh
+#   inc_weed_out - list #includes that can be removed without introducing warnings
+#   Copyright (C) 2016 Tibor 'Igor2' Palinkas
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program; if not, write to the Free Software Foundation, Inc.,
+#   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+#   http://repo.hu/projects/pcb-rnd
+
+# include weed-out: attempt to compile an object with each #include lines
+# commented out one by one; if commenting an #include doesn't change compiler
+# warnings, that include is potentially unneeded.
+
+# Usage:
+#  1. compile the whole project so that all dependencies of the target file are compiled
+#  2. inc_weed_out.sh foo.c
+#  3. check the output, remove #includes
+#  4. compile by hand to check
+#
+#  NOTE: the script runs 'make foo.o' - your local Makefile needs to be able
+#        to compile foo.o
+#  NOTE: sometimes disabling multiple #includes have different effect than
+#        disabling them one by one - always check manually.
+
+# set up file names
+fn_c=$1
+fn_o=${1%.c}.o
+fn_c_backup=$fn_c.inc_weed_out
+fn_refo=$1.refo
+fn_tmpo=$1.tmpo
+
+# comment one #include (index is $1, save output in $2, print the #include line to stdout)
+weed_out()
+{
+	awk -v "target=$1" -v "outf=$2" '
+		/^#[ \t]*include/ {
+			count++
+			if (count == target) {
+				print "/*" $0 "*/" > outf
+				print $0
+				found=1
+				next
+			}
+		}
+		{ print $0 > outf }
+		END {
+			exit(found!=1)
+		}
+	'
+}
+
+# make a backup
+cp $fn_c $fn_c_backup
+
+# generate initial/reference warning text
+touch $fn_c
+make $fn_o >/dev/null 2>$fn_refo
+
+# loop over #include indices
+cnt=1
+while true
+do
+	# comment out the next #include or break if there's no more
+	name=`weed_out $cnt < $fn_c_backup $fn_c`
+	if test -z "$name"
+	then
+		break
+	fi
+
+	# test compile to see if we got new warnings compared to the reference
+	make $fn_o 2>$fn_tmpo >/dev/null
+	diff $fn_refo $fn_tmpo >/dev/null && echo REMOVE: $cnt $name
+
+	# start over
+	cnt=$(($cnt+1))
+done
+
+# clean up
+mv $fn_c_backup $fn_c
+rm $fn_refo $fn_tmpo

Property changes on: inc_weed_out.sh
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Added: svn:executable
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+*
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