--- a/Makefile.am
+++ b/Makefile.am
@@ -30,11 +30,9 @@
 DEFS= \
   -DPKGDATADIR=\"$(pkgdatadir)/\"
 
-LIBS=$(DEPS_LIBS) -lm
+LIBS+=$(DEPS_LIBS) -lm
 
 AM_CPPFLAGS = \
-  -g \
-  -O2 \
   -Wall \
   -Wmissing-prototypes \
   -Wmissing-declarations \