preserve passed in CFLAGS
diff --git a/configure.in b/configure.in
index c74ab25..d8da057 100644
--- a/configure.in
+++ b/configure.in
@@ -135,6 +135,7 @@
AC_SUBST(FLaC__SIZE64)
AC_SUBST(FLaC__USIZE64)
+SAVE_CFLAGS="$CFLAGS"
CFLAGS='-I./include -I $(top_srcdir)/include -Wall -W'
if test x$debug = xtrue; then
CFLAGS="$CFLAGS -g -O0 -DDEBUG"
@@ -144,6 +145,7 @@
CFLAGS="$CFLAGS -fomit-frame-pointer -funroll-loops -finline-functions -Winline -DFLAC__INLINE=__inline__"
fi
fi
+CFLAGS="$CFLAGS $SAVE_CFLAGS"
AC_OUTPUT( Makefile \
src/Makefile \