Attempt to fix clang FORTIFY build breakage.
Clang FORTIFY (https://android-review.googlesource.com/#/c/335638/)
made strlen a non-constant expression.
Bug: None
Test: Builds
Change-Id: I8768d0cbc4b54a25031237a64d12f0feeca407f7
diff --git a/sensor_hub/cros_ec_sensors.h b/sensor_hub/cros_ec_sensors.h
index d28311d..61b3124 100644
--- a/sensor_hub/cros_ec_sensors.h
+++ b/sensor_hub/cros_ec_sensors.h
@@ -30,7 +30,11 @@
#define IIO_MAX_BUFF_SIZE 4096
#define INT32_CHAR_LEN 12
-#define IIO_MAX_DEVICE_NAME_LENGTH (strlen(IIO_DIR) + IIO_MAX_NAME_LENGTH)
+/*
+ * Use sizeof(...) - 1 instead of strlen because clang FORTIFY makes strlen
+ * non-constant.
+ */
+#define IIO_MAX_DEVICE_NAME_LENGTH (sizeof(IIO_DIR) - 1 + IIO_MAX_NAME_LENGTH)
#define CROS_EC_MAX_SAMPLING_PERIOD ((1 << 16) - 2)
