编译

rtthread编译的一个诡异的问题

发布于 2021-12-01 15:07:53 浏览：563 订阅该版

recan 认证专家 2021-12-01

公众号【架构师李肯】主理人，每周赠送10本IT书籍，正在挑战100+最佳答案，有疑难问题请邀请我回答@_@

antfeifei 2021-12-02

这家伙很懒，什么也没写！

recan 2021-12-02

公众号【架构师李肯】主理人，每周赠送10本IT书籍，正在挑战100+最佳答案，有疑难问题请邀请我回答@_@

@antfeifei 看了下对应bsp的rtconfig.py：
![image.png](https://oss-club.rt-thread.org/uploads/20211202/d22b510d2739a011b5ed3a1152a3e91e.png.webp)
你可以在这里加个print看下RTT_ROOT的值，这个才是决定编译那个目录下的代码。
另外，还有方法也可以解决你的困惑，你先`scons -c`清除编译，再使用`scons --verbose`编译；
这个时候会输出一大堆的编译信息，随便找一个文件的编译输出，即可看出来：
例如：
```c
arm-none-eabi-gcc -o build/kernel/components/drivers/rtc/rtc.o -c -march=armv7-a -marm -msoft-float -Wall -g -gdwarf-2 -O0 -std=c99 -DHAVE_CCONFIG_H -D__RTTHREAD__ -DRT_USING_NEWLIB -I. -Idrivers -Iapplications -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/include -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/libcpu/arm/common -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/libcpu/arm/cortex-a -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/cplusplus -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/drivers/include -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/drivers/spi -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/drivers/spi/sfud/inc -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/net/sal_socket/include -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/net/sal_socket/include/socket -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/net/sal_socket/impl -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/net/sal_socket/include/dfs_net -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/net/sal_socket/include/socket/sys_socket -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/net/netdev/include -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/net/lwip-2.1.2/src -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/net/lwip-2.1.2/src/include -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/net/lwip-2.1.2/src/arch/include -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/net/lwip-2.1.2/src/include/netif -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/libc/compilers/common -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/libc/compilers/gcc/newlib -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/libc/posix/src -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/libc/posix/pthreads -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/libc/posix/signal -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/libc/posix/termios -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/libc/posix/aio -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/libc/posix/getline -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/lwp -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/dfs/include -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/dfs/filesystems/devfs -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/dfs/filesystems/elmfat -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/dfs/filesystems/ramfs -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/dfs/filesystems/romfs -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/finsh -I/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/examples/utest/testcases/kernel /home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/drivers/rtc/rtc.c
```
看最后我就知道是哪个c文件`/home/recan/win_share_workspace/rt-thread-share/rt-thread-share/rt-thread/components/drivers/rtc/rtc.c`参与编译，自然我就知道它编译的是哪个目录的文件。
你可以试试看。