Is it possible to compile the lvgl examples on idf 4.0 / gcc 8.2 tool chain? (AEGHB-290)

[daduke]

Environment

• Development Kit: none

• Kit version

• Module or chip used: ESP32-WROVER-B

• IDF version (run git describe --tags to find it): v4.0-dev-1443-g39f090a4f

• Build System: both

• Compiler version (run xtensa-esp32-elf-gcc --version to find it): 8.2.0

• Operating System: Fedora 30

• Power Supply: external 3.3V

Problem Description

trying to compile the lvgl examples on idf 4.0 / gcc 8.2 tool chain results in dozens of errors. Is this even supported?

Expected Behavior

successful make

Actual Behavior

hundreds of errors like
/opt/esp32-idf/projects/esp-iot-solution/submodule/esp-idf/components/newlib/include/sys/reent.h:166:8: error: '_VOID' does not name a type
extern _VOID _EXFUN(__sinit,(struct _reent *));

/opt/esp32-idf/esp-idf/tools/xtensa-esp32-elf/esp32-2019r1-8.2.0/xtensa-esp32-elf/xtensa-esp32-elf/sys-include/stdlib.h:155:44: error: expected initializer before '__result_use_check'
void *reallocarray(void *, size_t, size_t) __result_use_check __alloc_size(2)

etc
other projects build fine.

Steps to repropduce

1. install current idf + current toolchain according to docs
2. make menuconfig
3. make

Code to reproduce this issue

Debug Logs

Other items if possible

[C47D]

Hi @daduke,

There's a example project on the LVGL repo which is running using both IDF3.3 and 4.0, maybe it can help you to get up and running, its available here: lv_port_esp32_ili9341.

We're also trying to find a easy way to integrate lvgl into esp32 projects in here, maybe you can help us with some suggestions.

Regards

[InfiniteYuan]

IDF submodule will be updated to 3.3 or 4.0 soon.

[leeebo]

Hi @daduke , you can use esp-iot-solution/tree/release/v1.1 branch in your idf 4.0 project. You can also use standalone lvgl repo here: https://github.com/lvgl/lv_port_esp32 .

[leeebo]

The ESP-IDF has integrated LVGL from v5.0, please use the component https://components.espressif.com/components/espressif/esp_lvgl_port instead, and you can find more examples in https://github.com/espressif/esp-idf/tree/master/examples/peripherals/lcd and https://github.com/espressif/esp-bsp/tree/master/esp32_s3_lcd_ev_board