diff --git a/configure b/configure
index f977663..bb72fba 100755
--- a/configure
+++ b/configure
@@ -7,7 +7,7 @@ SYSCONF=/etc
 
 # Compile defaults
 CROSS_COMPILE=
-CC ?= cc
+CC=${CC:-cc}
 CFLAGS=
 
 system=`uname -s`
@@ -20,7 +20,7 @@ case $system in
     makext="linux";
     ksrc="linux";
     state="known";
-    CFLAGS="$(CFLAGS)";;
+    CFLAGS="${CFLAGS:--O2 -g -pipe}";;
   SunOS)
     karch=`/usr/bin/isainfo -k`
     case $release in