keep fchdir symbol in libc.so.0 on tomato shibby v131, so that perpd can run

libc_strip.patch

diff -aur '--exclude=.git' /home/oglop/tomato/tomato_intact/release/src/btools/libfoo.pl /home/oglop/tomato/tomato_latest/release/src/btools/libfoo.pl
--- /home/oglop/tomato/tomato_intact/release/src/btools/libfoo.pl	2015-09-16 11:51:50.750693058 +0800
+++ /home/oglop/tomato/tomato_latest/release/src/btools/libfoo.pl	2015-09-16 15:06:21.243200192 +0800
@@ -493,6 +493,17 @@
 #		<>;
 		return 0;
 	}
+	
+	# keep this symbol for libc
+	my @keep_symbols=("fchdir");
+	my $tmp;
+	if ($name eq "libc.so.0"){
+		foreach $tmp (@keep_symbols) {
+			@unused = grep !/$tmp/, @unused;
+			push @used, $tmp;
+		}
+	}
+
 	$cmd .= " -u " . join(" -u ", @used) . " ". $arc;
 
 	print LOG "Command: $cmd\n";
diff -aur '--exclude=.git' /home/oglop/tomato/tomato_intact/release/src/router/snmp/aclocal.m4 /home/oglop/tomato/tomato_latest/release/src/router/snmp/aclocal.m4
--- /home/oglop/tomato/tomato_intact/release/src/router/snmp/aclocal.m4	2015-09-16 11:52:37.600892247 +0800
+++ /home/oglop/tomato/tomato_latest/release/src/router/snmp/aclocal.m4	2015-09-16 11:25:27.612883687 +0800
@@ -2793,7 +2793,7 @@
 NM=$lt_NM
 
 # A symbol stripping program
-STRIP=$STRIP
+STRIP="$STRIP"
 
 # Used to examine libraries when file_magic_cmd begins "file"
 MAGIC_CMD=$MAGIC_CMD
diff -aur '--exclude=.git' /home/oglop/tomato/tomato_intact/release/src/router/snmp/aclocal.m4.libtool /home/oglop/tomato/tomato_latest/release/src/router/snmp/aclocal.m4.libtool
--- /home/oglop/tomato/tomato_intact/release/src/router/snmp/aclocal.m4.libtool	2015-09-16 11:52:37.602892256 +0800
+++ /home/oglop/tomato/tomato_latest/release/src/router/snmp/aclocal.m4.libtool	2015-09-16 11:25:35.108916396 +0800
@@ -2793,7 +2793,7 @@
 NM=$lt_NM
 
 # A symbol stripping program
-STRIP=$STRIP
+STRIP="$STRIP"
 
 # Used to examine libraries when file_magic_cmd begins "file"
 MAGIC_CMD=$MAGIC_CMD