add

CMakeLists.txt

@@ -1,6 +1,6 @@
-cmake_minimum_required(VERSION 3.17)
+cmake_minimum_required(VERSION 3.16)
 project(UA2F C)
 
 set(CMAKE_C_STANDARD 99)
 
-add_executable(UA2F main.c)
+add_executable(UA2F src/main.c)

Makefile

@@ -0,0 +1,51 @@
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+# Name, version and release number
+# The name and version of your package are used to define the variable to point to the build directory of your package: $(PKG_BUILD_DIR)
+PKG_NAME:=UA2F
+PKG_VERSION:=1.0
+PKG_RELEASE:=1
+
+# Source settings (i.e. where to find the source codes)
+# This is a custom variable, used below
+SOURCE_DIR:=./src
+
+include $(INCLUDE_DIR)/package.mk
+
+# Package definition; instructs on how and where our package will appear in the overall configuration menu ('make menuconfig')
+define Package/ua2f
+  SECTION:=net
+  CATEGORY:=Network
+  SUBMENU:=Routing and Redirection
+  TITLE:=Change User-Agent to Fwords
+  URL:=https://learningman.top
+endef
+
+# Package description; a more verbose description on what our package does
+define Package/ua2f/description
+  Change User-agent to Fwords to prevent be checked by Dr.Com.
+endef
+
+# Package preparation instructions; create the build directory and copy the source code.
+# The last command is necessary to ensure our preparation instructions remain compatible with the patching system.
+define Build/Prepare
+        mkdir -p $(PKG_BUILD_DIR)
+        cp $(SOURCE_DIR)/* $(PKG_BUILD_DIR)
+        $(Build/Patch)
+endef
+
+# Package build instructions; invoke the target-specific compiler to first compile the source file, and then to link the file into the final executable
+define Build/Compile
+        $(TARGET_CC) $(TARGET_CFLAGS) -o $(PKG_BUILD_DIR)/helloworld.o -c $(PKG_BUILD_DIR)/helloworld.c
+        $(TARGET_CC) $(TARGET_LDFLAGS) -o $(PKG_BUILD_DIR)/$1 $(PKG_BUILD_DIR)/helloworld.o
+endef
+
+# Package install instructions; create a directory inside the package to hold our executable, and then copy the executable we built previously into the folder
+define Package/ua2f/install
+        $(INSTALL_DIR) $(1)/usr/bin
+        $(INSTALL_BIN) $(PKG_BUILD_DIR)/helloworld $(1)/usr/bin
+endef
+
+# This command is always the last, it uses the definitions and variables we give above in order to get the job done
+$(eval $(call BuildPackage,ua2f))

main.c

@@ -1,6 +0,0 @@
-#include <stdio.h>
-
-int main() {
-    printf("Hello, World!\n");
-    return 0;
-}

src/main.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(void){
+    int a=200;
+    
+}