--- Makefile.in
+++ Makefile.in
@@ -94,7 +94,7 @@
 CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
 CXXDEPMODE = @CXXDEPMODE@
-CXXFLAGS = @CXXFLAGS@
+CXXFLAGS = @CXXFLAGS@ $(EXTRA_CXXFLAGS)
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
@@ -107,7 +107,7 @@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_SCRIPT = @INSTALL_SCRIPT@
 INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
-LDFLAGS = @LDFLAGS@
+LDFLAGS = @LDFLAGS@ $(EXTRA_LDFLAGS)
 LIBOBJS = @LIBOBJS@
 LIBS = @LIBS@
 LTLIBOBJS = @LTLIBOBJS@