* QA Notice: Files built without respecting LDFLAGS have been detected * /usr/bin/unsquashfs * /usr/bin/mksquashfs I checked the patched makefile, and portage is right: It seems that one should replace the two occurrences of "\$(CC)" by "\$(CC) ${LDFLAGS}" in the makefile.
This was FIXED with the addition of squashfs-tools-3.4 to the tree.