Add ./configure --with-drive-if=(ide|scsi|virtio)

[libguestfs.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 03f9388..ae0d81e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -102,6 +102,18 @@ the --with-qemu option.
     AC_MSG_RESULT([yes])
 fi
 
+dnl Set drive interface used by the guestfs_add_drive{,_ro} calls
+dnl ('-drive ...,if=...' option to qemu).
+dnl
+dnl NB. We will change the default in future to virtio, but at the
+dnl moment this causes a performance problem, RHBZ#509383.
+AC_ARG_WITH([drive-if],
+       [AS_HELP_STRING([--with-drive-if],
+         [set default driver (ide|scsi|virtio) @<:@default=ide@:>@])],
+       [],
+       [with_drive_if=ide])
+AC_DEFINE_UNQUOTED([DRIVE_IF],["$with_drive_if"],[Default drive interface.])
+
 dnl Check for febootstrap etc.
 AC_CHECK_PROG([FEBOOTSTRAP],
        [febootstrap],[febootstrap],[no])