build: Fix warning if the auto.conf does not exist

    esp-idf/make/common.mk:10 some/include/config/auto.conf: No such file or directory

diff --git a/make/common.mk b/make/common.mk
index 41a87b3a644e44659822886fbfb0044e5d4c8f85..24aebb4cce216b266c77215f4e3664d79881fc10 100644 (file)
--- a/make/common.mk
+++ b/make/common.mk
@@ -7,7 +7,7 @@
 # (Note that we only rebuild this makefile automatically for some
 # targets, see project_config.mk for details.)
 SDKCONFIG_MAKEFILE ?= $(abspath $(BUILD_DIR_BASE)/include/config/auto.conf)
-include $(SDKCONFIG_MAKEFILE)
+-include $(SDKCONFIG_MAKEFILE)
 export SDKCONFIG_MAKEFILE  # sub-makes (like bootloader) will reuse this path
 
 # BATCH_BUILD flag disables interactive terminal features, defaults to verbose build