From 0cc98b8d76975b2c52f5dd6f7b346c3e2326de1a Mon Sep 17 00:00:00 2001
From: Angus Gratton <angus@espressif.com>
Date: Fri, 20 Dec 2019 15:09:15 +1100
Subject: [PATCH] secure boot: Fix bootloader build system target for
 bootloader digest

Closes https://github.com/espressif/esp-idf/issues/4513
---
 components/bootloader/subproject/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/bootloader/subproject/CMakeLists.txt b/components/bootloader/subproject/CMakeLists.txt
index 9a49fee85..e6bdbb7db 100644
--- a/components/bootloader/subproject/CMakeLists.txt
+++ b/components/bootloader/subproject/CMakeLists.txt
@@ -76,7 +76,7 @@ if(CONFIG_SECURE_BOOTLOADER_REFLASHABLE)
         COMMAND ${CMAKE_COMMAND} -E echo "DIGEST ${bootloader_digest_bin}"
         COMMAND ${ESPSECUREPY} digest_secure_bootloader --keyfile "${secure_bootloader_key}"
         -o "${bootloader_digest_bin}" "${CMAKE_BINARY_DIR}/bootloader.bin"
-        MAIN_DEPENDENCY gen_project_binary
+        MAIN_DEPENDENCY "${CMAKE_BINARY_DIR}/.bin_timestamp"
         DEPENDS gen_secure_bootloader_key gen_project_binary
         VERBATIM)