storage: Add STORAGE_HOSTFS

CONFIG_STORAGE & STORAGE_HOSTFS allows to use parts of the storage_* API to be
compiled for application targets without compiling storage.c or performing
actually raw storage access. This is primarily to enable application targets to
implement HAVE_MULTIVOMULE/HAVE_HOTSWAP (in a later commit).

SIMULATOR uses the same mechanism without explicitely defining STORAGE_HOSTFS
(how to add a bit to an existing preprocessor token?).

Change-Id: Ib3f8ee0d5231e2ed21ff00842d51e32bc4fc7292

1 files changed, 7 insertions, 0 deletions

diff --git a/uisimulator/common/stubs.c b/uisimulator/common/stubs.c
index 18f60ce6b3..480c2a90d8 100644
--- a/uisimulator/common/stubs.c
+++ b/uisimulator/common/stubs.c
@@ -395,3 +395,10 @@ void touchpad_enable_device(bool en)
     (void)en;
 }
 #endif
+
+#if (CONFIG_STORAGE & STORAGE_MMC)
+bool mmc_touched(void)
+{
+    return false;
+}
+#endif