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-rw-r--r--block/raw-posix.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/block/raw-posix.c b/block/raw-posix.c
index 697cd2ee68..1688e16c64 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -1776,6 +1776,18 @@ static int hdev_create(const char *filename, QEMUOptionParameter *options,
int ret = 0;
struct stat stat_buf;
int64_t total_size = 0;
+ bool has_prefix;
+
+ /* This function is used by all three protocol block drivers and therefore
+ * any of these three prefixes may be given.
+ * The return value has to be stored somewhere, otherwise this is an error
+ * due to -Werror=unused-value. */
+ has_prefix =
+ strstart(filename, "host_device:", &filename) ||
+ strstart(filename, "host_cdrom:" , &filename) ||
+ strstart(filename, "host_floppy:", &filename);
+
+ (void)has_prefix;
/* Read out options */
while (options && options->name) {