diff --git a/configure.in b/configure.in
index 77dcab07..46a83f8d 100644
--- a/configure.in
+++ b/configure.in
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script.
 AC_INIT(src/backtrace.c)
 AC_CONFIG_AUX_DIR(aux)
 AC_CANONICAL_SYSTEM
-AM_INIT_AUTOMAKE(libunwind, 0.2-pre1)
+AM_INIT_AUTOMAKE(libunwind, 0.2-pre2)
 AM_MAINTAINER_MODE
 AM_CONFIG_HEADER(include/config.h)
 
@@ -65,6 +65,10 @@ else
 fi
 ASFLAGS="${ASFLAGS} ${CPPFLAGS}"
 
+if test x$GCC = xyes; then
+  CFLAGS="${CFLAGS} -Wall"
+fi
+
 arch="$target_arch"
 ARCH=`echo $target_arch | tr [a-z] [A-Z]`