$ tree 
.
├── apps
│   ├── app1	# 编译app1的源文件
│   │   └── main.c
│   └── app2	# 编译app2的源文件
│       └── main.c
├── build		# CMAKE构建输出目录
├── cmake
│   ├── app.cmake		# 构建app
│   ├── config.cmake	# 构建配置
│   ├── kernel.cmake	# 构建KO
│   ├── lib.cmake		# 构建库
│   ├── target.cmake	# 构建目标
│   └── user.cmake		# 用户态相关构建
├── CMakeLists.txt
├── core		# 编译KO源文件
│   └── module.c
├── docs		# 当前未使用
├── extern_lib	# 外部三方库路径
│   ├── extlib.h
│   └── libext.so
├── include
│   ├── add
│   │   └── add.h
│   ├── print.h
│   └── sub
│       └── sub.h
├── README.md
├── src			# 编译so源文件路径
│   ├── add
│   │   └── add.c
│   ├── print.c
│   └── sub
│       └── sub.c
└── tests		# 当前未使用

cmake -S . -B build

cmake -S . -B build -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON

$ cd build/
$ make
Scanning dependencies of target ko
[ 11%] SHELL_OUTPUT
[ 11%] Built target ko
Scanning dependencies of target my_test
[ 22%] Building C object CMakeFiles/my_test.dir/src/print.c.o
[ 33%] Building C object CMakeFiles/my_test.dir/src/add/add.c.o
[ 44%] Building C object CMakeFiles/my_test.dir/src/sub/sub.c.o
[ 55%] Linking C shared library libmy_test.so
[ 55%] Built target my_test
Scanning dependencies of target app2
[ 66%] Building C object CMakeFiles/app2.dir/apps/app2/main.c.o
[ 77%] Linking C executable app2
[ 77%] Built target app2
Scanning dependencies of target app1
[ 88%] Building C object CMakeFiles/app1.dir/apps/app1/main.c.o
[100%] Linking C executable app1
[100%] Built target app1

$ file libmy_test.so 
libmy_test.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=430735ea7148d002a148f8d51e0041f2217dd309, not stripped

$ file my_test.ko 
my_test.ko: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), BuildID[sha1]=6abe75f9a2bf873f2cb1e8321b88dd5d2f9791c4, not stripped

$ ldd app1 
        linux-vdso.so.1 =>  (0x00007ffe0899d000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f2045de9000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f2045ae7000)
        libmy_test.so => /home/extended-project/build/libmy_test.so (0x00007f20458e5000)
        libext.so => /home/extended-project/extern_lib/libext.so (0x00007f20456e3000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f2045315000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f2046005000)

$ ldd app2 
        linux-vdso.so.1 =>  (0x00007ffdc8b92000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f717f6cb000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f717f3c9000)
        libmy_test.so => /home/extended-project/build/libmy_test.so (0x00007f717f1c7000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f717edf9000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f717f8e7000)

gcc -Dmy_test_EXPORTS  -fPIC   -lpthread -lm -Wall -Werror -g -O0 -fstack-protector-strong -I/home/extended-project/include/ -I/home/extended-project/include/add -I/home/extended-project/include/sub  -o CMakeFiles/my_test.dir/src/print.c.o   -c /home/extended-project/src/print.c
gcc -Dmy_test_EXPORTS  -fPIC   -lpthread -lm -Wall -Werror -g -O0 -fstack-protector-strong -I/home/extended-project/include/ -I/home/extended-project/include/add  -o CMakeFiles/my_test.dir/src/add/add.c.o   -c /home/extended-project/src/add/add.c
gcc -Dmy_test_EXPORTS  -fPIC   -lpthread -lm -Wall -Werror -g -O0 -fstack-protector-strong -I/home/extended-project/include/ -I/home/extended-project/include/sub  -o CMakeFiles/my_test.dir/src/sub/sub.c.o   -c /home/extended-project/src/sub/sub.c
gcc  -I/home/extended-project/include -I/home/extended-project/include/sub  -lpthread -lm -Wall -Werror -g -O0 -o CMakeFiles/app2.dir/apps/app2/main.c.o   -c /home/extended-project/apps/app2/main.c
gcc    CMakeFiles/app2.dir/apps/app2/main.c.o  -o app2 -Wl,-rpath,/home/extended-project/build -lpthread -lm libmy_test.so -lpthread -lm 
gcc  -I/home/extended-project/include -I/home/extended-project/include/add -I/home/extended-project/extern_lib  -lpthread -lm -Wall -Werror -g -O0 -o CMakeFiles/app1.dir/apps/app1/main.c.o   -c /home/extended-project/apps/app1/main.c
gcc    CMakeFiles/app1.dir/apps/app1/main.c.o  -o app1  -L/home/extended-project/extern_lib -Wl,-rpath,/home/extended-project/build:/home/extended-project/extern_lib -lpthread -lm libmy_test.so -lext -lpthread -lm