-SILC_ADD_CC_FLAGS(MATH, -O3, SILC_ADD_CC_FLAGS(MATH, -O2))
-SILC_ADD_CC_FLAGS(MATH, -funroll-all-loops)
+if test x$want_cc_optimizations = xtrue; then
+ SILC_ADD_CC_FLAGS(MATH, -O3, SILC_ADD_CC_FLAGS(MATH, -O2))
+ SILC_ADD_CC_FLAGS(MATH, -funroll-all-loops)
+fi