diff -Nur squashfs4.2.orig/squashfs-tools/Makefile squashfs4.2/squashfs-tools/Makefile
--- squashfs4.2.orig/squashfs-tools/Makefile	2011-02-28 21:04:15.000000000 +0100
+++ squashfs4.2/squashfs-tools/Makefile	2013-12-27 13:49:22.000000000 +0100
@@ -93,7 +93,7 @@
 #        End of BUILD options section         #
 ###############################################
 
-INCLUDEDIR = -I.
+INCLUDEDIR = -I. $(CPPFLAGS_FOR_BUILD)
 INSTALL_DIR = /usr/local/bin
 
 MKSQUASHFS_OBJS = mksquashfs.o read_fs.o sort.o swap.o pseudo.o compressor.o