feat(cmake): add user cross compile setup (#70)

* feat(cmake): add user cross compile setup * Update README.md --------- Co-authored-by: YobeZhou <[email protected]>
lvgl · Feb 6, 2025 · e535225 · e535225
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diff --git a/README.md b/README.md
@@ -59,7 +59,6 @@ To use wayland, adjust `lv_conf.h` as follows:
 #define LV_USE_WAYLAND		1
 ```
 
-
 ## Enable Input
 
 To use EVDEV with fbdev or DRM, adjust `lv_conf.h` as follows:
@@ -70,10 +69,19 @@ To use EVDEV with fbdev or DRM, adjust `lv_conf.h` as follows:
 
 ## cmake
 
+1. gcc compiler:
+
 ```
 cmake -B build -S .
 make -C build -j
 ```
+2. Cross compiler:
+
+```
+vim ./user_cross_compile_setup.cmake
+cmake -DCMAKE_TOOLCHAIN_FILE=./user_cross_compile_setup.cmake -B build -S .
+make  -C build -j
+```
 
 ## Makefile
 

diff --git a/user_cross_compile_setup.cmake b/user_cross_compile_setup.cmake
@@ -0,0 +1,15 @@
+# Usage:
+# cmake -DCMAKE_TOOLCHAIN_FILE=./user_cross_compile_setup.cmake -B build -S .
+# make  -C build -j
+
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR arm)
+
+set(tools /home/ubuntu/Your_SDK/prebuilt/rootfsbuilt/arm/toolchain-glibc-gcc/toolchain)
+set(CMAKE_C_COMPILER ${tools}/bin/arm-openwrt-linux-gnueabi-gcc)
+set(CMAKE_CXX_COMPILER ${tools}/bin/arm-openwrt-linux-gnueabi-g++)
+
+# If necessary, set STAGING_DIR
+# if not work, please try(in shell command): export STAGING_DIR=/home/ubuntu/Your_SDK/out/xxx/openwrt/staging_dir/target
+#set(ENV{STAGING_DIR} "/home/ubuntu/Your_SDK/out/xxx/openwrt/staging_dir/target")
+