Generation and use of Lib library files in keil and IAR

One .lib The use of static libraries has the following advantages ：

1. Encapsulate source code , Not open to the outside world , Improve confidentiality .
2. Encapsulate standard function functions into libraries , Improve code reusability .
3. Use the library to develop , Simplify development process , Improve development efficiency .
4. System call library functions , Improve execution efficiency .

Two .keil In the environment Lib Library generation

1. Modify the compilation output mode to Create Library, That is, the output is created lib library , And in 2 The name of the input warehouse .

2. Select the file that needs to be compiled as a library , That is, exclude files or folders that do not need to be compiled from compilation .
First, select the file or folder that does not need to be compiled and right-click , choice options… Options , As shown below ：

And then include in Target Build Uncheck the option box , As shown below ：

3. After selection, the system project folder is as follows , It can be seen that only hututu_test.c Files participate in compilation .

4. After recompiling the whole project, the output is as follows ：

5. After compilation, it can be generated in the selected output folder .lib file

thus lib Library generation succeeded .

3、 ... and .keil In the environment Lib Library call

lib After the library is generated, you need to call the Library , To replace the original c file , The specific steps are as follows ：
1. First, change the system compilation output option to executable , As shown below ：

2. take lib Add files to system engineering

3. Will participate in the compilation before c Remove files from the system （ Because the library file replaces the function of this part of the code ）

4. Recompile project , give the result as follows , It can be seen that the library file is effective . Replaced the original part c Role of documents .

thus , The call test of the library file ends .

Four .IAR In the environment Lib Library generation

1. Modify the compilation output mode to Output---->Library, That is, the output is created lib library , And in 2 Select the path to save the library and enter the name of the Library .


2. Select the file that needs to be compiled as a library , That is, exclude files or folders that do not need to be compiled from compilation .
First, select the file or folder that does not need to be compiled and right-click , choice options… Options , Then check it out. Exclude from build, That is to exclude compilation , In the end, there is nothing left hututu_test.c Files participate in compilation , As shown below ：

3. Recompile the results of the whole project and the generated lib The file is shown below ：

thus , The whole project compiles and generates Lib File complete .

5、 ... and .IAR In the environment Lib Library call

lib After the library is generated, you need to call the Library , To replace the original c file , The specific steps are as follows ：
1. First, change the system compilation output option to executable , As shown below ：

2. take lib Add files to system engineering

3. Will participate in the compilation before c Remove files from the system （ Because the library file replaces the function of this part of the code ）

4. Recompile project , give the result as follows , It can be seen that the library file is effective . Replaced the original part c Role of documents .

thus , The call test of the library file ends .

6、 ... and . summary

  keil and IAR Of lib The generation and invocation of static libraries are basically consistent , The use of static library can greatly simplify the complexity of the project . The generation of static libraries is only for source files (.c file ) Encapsulation , Not designed .h The header file , therefore lib The use of the library needs to cooperate with the header file ( Just use lib Replaced many .c file ), After we package lib When the library is to be used by others , Only need to lib Kuhe .h Just send the document to others , Convenient and efficient .