btashton commented on pull request #510:
URL:
https://github.com/apache/incubator-nuttx-apps/pull/510#issuecomment-735456605
@v01d Looks like it is more than just the sign issue with the format string
(uint32 vs int). I did this change and everything built fine.
```c
diff --git a/graphics/lvgl/Make.defs b/graphics/lvgl/Make.defs
index 681b8f4f..96c203a5 100644
--- a/graphics/lvgl/Make.defs
+++ b/graphics/lvgl/Make.defs
@@ -36,6 +36,7 @@
ifeq ($(CONFIG_GRAPHICS_LVGL),y)
CONFIGURED_APPS += $(APPDIR)/graphics/lvgl
+CFLAGS += "-Wno-format"
# It allows `<lvgl/lvgl.h>` import.
```
```
./tools/configure.sh stm32f429i-disco:lvgl
make EXTRAFLAGS="-Wno-cpp -Werror"
```
That is the underlying make argument that the CI system uses btw.
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