OpenWrt编译并添加自己写的应用-基于MT7620a

jack

• 创建应用所需的目录
  在trunk/package/ramips/applications/创建helloworld目录
  （也可以在trunk/package/目录下创建helloworld目录）
• 目录内的文件结构
  
                                 
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• 其中最外层Makefile的内容
  
  

1. ##############################################
   
2. # OpenWrt Makefile for helloworld program
   
3. #
   
4. #
   
5. # Most of the variables used here are defined in
   
6. # the include directives below. We just need to
   
7. # specify a basic description of the package,
   
8. # where to build our program, where to find
   
9. # the source files, and where to install the
   
10. # compiled program on the router.
    
11. #
    
12. # Be very careful of spacing in this file.
    
13. # Indents should be tabs, not spaces, and
    
14. # there should be no trailing whitespace in
    
15. # lines that are not commented.
    
16. #
    
17. ##############################################
    
18. include $(TOPDIR)/rules.mk
    
19. 
    
20. # Name and release number of this package
    
21. PKG_NAME:=helloworld
    
22. PKG_RELEASE:=1
    
23. 
    
24. # This specifies the directory where we're going to build the program.
    
25. # The root build directory, $(BUILD_DIR), is by default the build_mipsel
    
26. # directory in your OpenWrt SDK directory
    
27. 
    
28. PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
    
29. 
    
30. include $(INCLUDE_DIR)/package.mk
    
31. 
    
32. # Specify package information for this program.
    
33. # The variables defined here should be self explanatory.
    
34. # If you are running Kamikaze, delete the DESCRIPTION
    
35. # variable below and uncomment the Kamikaze define
    
36. # directive for the description below
    
37. define Package/helloworld
    
38.     SECTION:=utils
    
39.     CATEGORY:=Utilities
    
40.     TITLE:=Helloworld -- prints a snarky message
    
41. endef
    
42. # Uncomment portion below for Kamikaze and delete DESCRIPTION variable above
    
43. define Package/helloworld/description
    
44.     If you can't figure out what this program does, you're probably
    
45.     brain-dead and need immediate medical attention.
    
46. endef
    
47. # Specify what needs to be done to prepare for building the package.
    
48. # In our case, we need to copy the source files to the build directory.
    
49. # This is NOT the default.  The default uses the PKG_SOURCE_URL and the
    
50. # PKG_SOURCE which is not defined here to download the source from the web.
    
51. # In order to just build a simple program that we have just written, it is
    
52. # much easier to do it this way.
    
53. define Build/Prepare
    
54.     mkdir -p $(PKG_BUILD_DIR)
    
55.     $(CP) ./src/* $(PKG_BUILD_DIR)/
    
56. endef
    
57. 
    
58. define Build/Configure
    
59. endef
    
60. 
    
61. 
    
62. define Build/Compile
    
63.     $(MAKE) -C $(PKG_BUILD_DIR) \
    
64.         CC="$(TARGET_CC)" \
    
65.         CFLAGS="$(TARGET_CFLAGS) -Wall" \
    
66.         LDFLAGS="$(TARGET_LDFLAGS)"
    
67. endef
    
68. # We do not need to define Build/Configure or Build/Compile directives
    
69. # The defaults are appropriate for compiling a simple program such as this one
    
70. # Specify where and how to install the program. Since we only have one file,
    
71. # the helloworld executable, install it by copying it to the /bin directory on
    
72. # the router. The $(1) variable represents the root directory on the router running
    
73. # OpenWrt. The $(INSTALL_DIR) variable contains a command to prepare the install
    
74. # directory if it does not already exist.  Likewise $(INSTALL_BIN) contains the
    
75. # command to copy the binary file from its current location (in our case the build
    
76. # directory) to the install directory.
    
77. define Package/helloworld/install
    
78.     $(INSTALL_DIR) $(1)/bin
    
79.     $(INSTALL_BIN) $(PKG_BUILD_DIR)/helloworld $(1)/bin/
    
80. endef
    
81. # This line executes the necessary commands to compile our program.
    
82. # The above define directives specify all the information needed, but this
    
83. # line calls BuildPackage which in turn actually uses this information to
    
84. # build a package.
    
85. $(eval $(call BuildPackage,helloworld))

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• 列表内容
  

src文件夹下的Makefile内容

1. helloworld: helloworld.o
   
2.     $(CC) $(LDFLAGS) helloworld.o -o helloworld
   
3. helloworld.o: helloworld.c
   
4.     $(CC) $(CFLAGS) -c helloworld.c
   
5. clean:
   
6.     rm *.o helloworld

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• 应用程序helloworld的代码
  

1. /* ************************************************************************
   
2. *       Filename:  helloworld.c
   
3. *    Description:  
   
4. *        Version:  1.0
   
5. *        Created:  2016年01月22日 15时25分05秒
   
6. *       Revision:  none
   
7. *       Compiler:  gcc
   
8. *         Author:  YOUR NAME (),
   
9. *        Company:  
   
10. * ************************************************************************/
    
11. 
    
12. 
    
13. #include <stdio.h>
    
14. 
    
15. int main(int argc, char *argv[])
    
16. {
    
17.     printf("Hello, world!\n");
    
18. 
    
19.     return 0;
    
20. }

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• 编译make menuconfig
  选中Utilities -> helloworld
  
  
                                 
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• 编译之后就可以在OpenWrt中运行helloworld命令了
  
                                 
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