build: fix test for --nocompress option

[libguestfs.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 6bdf7d4..20edc70 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -248,7 +248,7 @@ if test "x$enable_supermin" = "xyes"; then
     AC_MSG_CHECKING([for --files support in $FEBOOTSTRAP_TO_INITRAMFS])
     out=`$FEBOOTSTRAP_TO_INITRAMFS 2>&1 ||:`
     echo "febootstrap_to_initramfs test command output: $out" >&AS_MESSAGE_LOG_FD
-    if ! echo $out | grep -sq -- "--files" ; then
+    if ! echo "$out" | grep -sq -e --files ; then
         AC_MSG_RESULT([no])
        AC_MSG_FAILURE(
 [febootstrap-to-initramfs does not support the --files option.