From f1ada8e8800a6ac64ebf611ba292b0eb93345c8e Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@unpythonic.net>
Date: Sun, 7 Mar 2021 11:48:16 -0600
Subject: Automatically count EXTERNAL_FLASH_DEVICES

---
 supervisor/supervisor.mk | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'supervisor/supervisor.mk')

diff --git a/supervisor/supervisor.mk b/supervisor/supervisor.mk
index 374b7a72b..f94bccd9a 100644
--- a/supervisor/supervisor.mk
+++ b/supervisor/supervisor.mk
@@ -33,6 +33,8 @@ endif
 # (Right now INTERNAL_FLASH_FILESYSTEM and (Q)SPI_FLASH_FILESYSTEM are mutually exclusive.
 # But that might not be true in the future.)
 ifdef EXTERNAL_FLASH_DEVICES
+  COMMA := ,
+  EXTERNAL_FLASH_DEVICE_COUNT := $(words $(subst $(COMMA), ,$(EXTERNAL_FLASH_DEVICES)))
   CFLAGS += -DEXTERNAL_FLASH_DEVICES=$(EXTERNAL_FLASH_DEVICES) \
 	    -DEXTERNAL_FLASH_DEVICE_COUNT=$(EXTERNAL_FLASH_DEVICE_COUNT)
 
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