Build error: failed to run custom build command for lvgl-sys v0.6.2

[ds2k5]

Hi,
what did I wrong ? Wanna use it on esp32-2432s028

1. git clone https://github.com/lvgl/lv_binding_rust
2. cd lv_binding_rust
3. git submodule init
   git submodule update
4. . ~/export-esp.sh
5. DEP_LV_CONFIG_PATH=pwd/examples/include cargo run --example demo --features="alloc"

   Compiling lvgl-sys v0.6.2 (/home/developer/rust/lv_binding_rust/lvgl-sys)
The following warnings were emitted during compilation:

warning: lvgl-sys@0.6.2: <command-line>: error: no macro name given in #define directive

error: failed to run custom build command for `lvgl-sys v0.6.2 (/home/developer/rust/lv_binding_rust/lvgl-sys)`

Caused by:
  process didn't exit successfully: `/home/developer/rust/lv_binding_rust/target/debug/build/lvgl-sys-27d7cc55f1f4dba6/build-script-build` (exit status: 1)
  --- stdout
  cargo:rerun-if-changed=/home/developer/rust/lv_binding_rust/fonts
  cargo:rerun-if-changed=/home/developer/rust/lv_binding_rust/examples/include/lv_conf.h
  cargo:rerun-if-changed=/home/developer/rust/lv_binding_rust/examples/include/lv_drv_conf.h
  cargo:rerun-if-env-changed=LVGL_INCLUDE
  cargo:rerun-if-env-changed=LVGL_LINK
  OUT_DIR = Some(/home/developer/rust/lv_binding_rust/target/debug/build/lvgl-sys-a8007676ceea7acc/out)
  TARGET = Some(x86_64-unknown-linux-gnu)
  OPT_LEVEL = Some(0)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CC_x86_64-unknown-linux-gnu
  CC_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=CC_x86_64_unknown_linux_gnu
  CC_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=HOST_CC
  HOST_CC = None
  cargo:rerun-if-env-changed=CC
  CC = None
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  RUSTC_WRAPPER = None
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some(true)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  cargo:rerun-if-env-changed=CFLAGS_x86_64-unknown-linux-gnu
  CFLAGS_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=CFLAGS_x86_64_unknown_linux_gnu
  CFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=HOST_CFLAGS
  HOST_CFLAGS = None
  cargo:rerun-if-env-changed=CFLAGS
  CFLAGS = None
  cargo:warning=<command-line>: error: no macro name given in #define directive

  --- stderr


  error occurred: Command "cc" "-O0" "-ffunction-sections" "-fdata-sections" "-fPIC" "-gdwarf-4" "-fno-omit-frame-pointer" "-m64" "-I" "/home/developer/rust/lv_binding_rust/lvgl-sys/vendor/lvgl/src" "-I" "/home/developer/rust/lv_binding_rust/lvgl-sys/vendor" "-I" "/home/developer/rust/lv_binding_rust/examples/include" "-I" "/home/developer/rust/lv_binding_rust/fonts" "-I" "/home/developer/rust/lv_binding_rust/lvgl-sys/vendor/lv_drivers" "-I" "/usr/include" "-I" "/usr/local/include" "-DLV_CONF_INCLUDE_SIMPLE=1" "-D=" "-o" "/home/developer/rust/lv_binding_rust/target/debug/build/lvgl-sys-a8007676ceea7acc/out/cae12387a3ab71a0-fonts_noto_sans_numeric_80.o" "-c" "/home/developer/rust/lv_binding_rust/fonts/fonts_noto_sans_numeric_80.c" with args cc did not execute successfully (status code exit status: 1).