build failed with `undefined reference to `app_main'

[stc1988]

Build environment: macOS,
Moddable SDK version: 8.0.1
Target device: M5stack, M5stackCores3

Steps to Reproduce

1. clone stack-chan repository
2. cd firmware/stackchan
3. mcconfig -d -m -p esp32/m5stack_cores3 -t build

/home/runner/.espressif/tools/xtensa-esp-elf/esp-15.2.0_20251204/xtensa-esp-elf/bin/../lib/gcc/xtensa-esp-elf/15.2.0/../../../../xtensa-esp-elf/bin/ld: esp-idf/freertos/libfreertos.a(app_startup.c.obj):(.literal.main_task+0x4): undefined reference to `app_main'
/home/runner/.espressif/tools/xtensa-esp-elf/esp-15.2.0_20251204/xtensa-esp-elf/bin/../lib/gcc/xtensa-esp-elf/15.2.0/../../../../xtensa-esp-elf/bin/ld: esp-idf/freertos/libfreertos.a(app_startup.c.obj): in function `main_task':
/home/runner/.local/share/esp32/esp-idf/components/freertos/app_startup.c:158:(.text.main_task+0x39): undefined reference to `app_main'
collect2: error: ld returned 1 exit status

Other information

Full build is here.

I tried building several applications, but no issues occurred except with stack-chan.　When I rolled back the commits, I confirmed that the issue started occurring from 6dcb076.

[phoddie]

Yikes! I broke Stack-chan!!! 😟

[phoddie]

This looks like a mistake in dependencies introduced when optimizing the ESP32 build. It seems to have been triggered by Stack-chan because of the large number of TypeScript source files, which take some time to convert, especially on a clean build.

I am able to build reliably by changing...

moddable/tools/mcconfig/make.esp32.mk

Line 673 in 5516726

$(SDKCONFIG_H): $(SDKCONFIG_FILE)

...to:

$(SDKCONFIG_H): $(SDKCONFIG_FILE) | $(PROJ_DIR_FILES)

Please let me know if that helps. Thank you.

[stc1988]

This fix make this the issue resolved. Thank you!