Scons使用一二

無意中看到了乙個用python來寫makefile的工具scons，使用了一下，感覺還不錯，記錄一下。

pip install scons

首先需要在目錄下建立乙個名為sconstruct的檔案，scons通過解析該檔案來進行編譯。

我們在檔案中首先先定義需要編譯哪些objects，具體格式如下：

obj = object([c files], ccflags = '', cpppath = [h files])

ccflags指定編譯選項

cpppath指定編譯需要的標頭檔案的路徑

對於我們這個project，具體可設定如下：

obj = object([

'./freertos_kernel/croutine.c',
'./freertos_kernel/list.c',
'./freertos_kernel/queue.c',
'./freertos_kernel/tasks.c',
'./freertos_kernel/portable/gcc/posix/port.c',
'./freertos_kernel/portable/memmang/heap_3.c',
'./src/main.c'
], ccflags= '-duse_stdio=1 -d__gcc_posix__=1',
cpppath = 
['./inc', './freertos_kernel/include', './freertos_kernel/portable/gcc/posix']
)

program('simulator_linux.bin', obj, libs=['pthread'])

『simulator_linux.bin』 指定了可執行檔案的名字

obj就是我們剛剛上面編譯後的objects

libs指定了我們需要鏈結的lib庫為pthread.

okay，全部搞定，在sconstruct檔案所在目錄執行』scons』就可以直接編譯了，使用』scons -c』就可以清除掉編譯出來的所有檔案。

效果如下：

root@ubuntu:~/desktop/simulator_linux$ scons

scons: reading sconscript files ...
scons: done reading sconscript files.
scons: building targets ...
gcc -o freertos_kernel/croutine.o -c -duse_stdio=1 -d__gcc_posix__=1 -iinc -ifreertos_kernel/include -ifreertos_kernel/portable/gcc/posix freertos_kernel/croutine.c
gcc -o freertos_kernel/list.o -c -duse_stdio=1 -d__gcc_posix__=1 -iinc -ifreertos_kernel/include -ifreertos_kernel/portable/gcc/posix freertos_kernel/list.c
gcc -o freertos_kernel/portable/gcc/posix/port.o -c -duse_stdio=1 -d__gcc_posix__=1 -iinc -ifreertos_kernel/include -ifreertos_kernel/portable/gcc/posix freertos_kernel/portable/gcc/posix/port.c
gcc -o freertos_kernel/portable/memmang/heap_3.o -c -duse_stdio=1 -d__gcc_posix__=1 -iinc -ifreertos_kernel/include -ifreertos_kernel/portable/gcc/posix freertos_kernel/portable/memmang/heap_3.c
gcc -o freertos_kernel/queue.o -c -duse_stdio=1 -d__gcc_posix__=1 -iinc -ifreertos_kernel/include -ifreertos_kernel/portable/gcc/posix freertos_kernel/queue.c
gcc -o freertos_kernel/tasks.o -c -duse_stdio=1 -d__gcc_posix__=1 -iinc -ifreertos_kernel/include -ifreertos_kernel/portable/gcc/posix freertos_kernel/tasks.c
gcc -o src/main.o -c -duse_stdio=1 -d__gcc_posix__=1 -iinc -ifreertos_kernel/include -ifreertos_kernel/portable/gcc/posix src/main.c
gcc -o simulator_linux.bin freertos_kernel/croutine.o freertos_kernel/list.o freertos_kernel/queue.o freertos_kernel/tasks.o freertos_kernel/portable/gcc/posix/port.o freertos_kernel/portable/memmang/heap_3.o src/main.o -lpthread
scons: done building targets.
root@ubuntu:~/desktop/simulator_linux$ ls
freertos_kernel  makefile    simulator_linux.bin  subdir.mk
inc              sconstruct  src                  tmp
root@ubuntu:~/desktop/simulator_linux$ scons -c
scons: reading sconscript files ...
scons: done reading sconscript files.
scons: cleaning targets ...
removed freertos_kernel/croutine.o
removed freertos_kernel/list.o
removed freertos_kernel/portable/gcc/posix/port.o
removed freertos_kernel/portable/memmang/heap_3.o
removed freertos_kernel/queue.o
removed freertos_kernel/tasks.o
removed src/main.o
removed simulator_linux.bin
scons: done cleaning targets.
root@ubuntu:~/desktop/simulator_linux$ ls
freertos_kernel  inc  makefile  sconstruct  src  subdir.mk  tmp

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