--- ./Makefile.orig
+++ ./Makefile
@@ -29,7 +29,7 @@
 
 $(call set-vpath, $(SRC_PATH):$(SRC_PATH)/hw)
 
-LIBS+=-lz $(LIBS_TOOLS)
+LIBS+=-lm -lz $(LIBS_TOOLS)
 
 ifdef BUILD_DOCS
 DOCS=qemu-doc.html qemu-tech.html qemu.1 qemu-img.1 qemu-nbd.8 QMP/qmp-commands.txt