1215_ Hello world used by scons

All learning summary ： https://github.com/GreyZhang/g_SCons

Try to understand earlier SCons When , With the help of seeing FAQ I have constructed a according to my own understanding hello world Routine for . Why add another one this time ？ Because this time I see what is mentioned in the document “ The orthodox ” The way . I've tried the routine , Just take this opportunity to analyze SCons Several default behaviors .

The code example is still very simple , Use C Language of a file can .

The configuration file used this time is no longer a python Program files , But a simple configuration file without suffix . Above hello.c Create in the directory where the file is located SConstruct file , Add the following configuration information ：

such , You have implemented a waiting to run build The environment . First , Try to Windows Running in the system ：

This operation failed , Tip: the relevant build tool cannot be found . It can be seen here , stay windows The compiler suite that tools on the platform are looking for by default is actually Microsoft's VS. With learning before makefile The experience of , This let me know that this process is linux It may be simpler . such , Transfer to WSL Medium test . Default installed scons The versions are not the same , But the basic routine operation should not affect .

Switch to the WSL in , The default example is built successfully . After compiling , The running program also runs successfully . From the prompt above , differ makefile By default, it looks for cc As the default compiler .scons stay linux below , It seems that the default behavior is to use gcc. I think this is also a good choice , Although now gcc Not necessarily the best compiler , But it is definitely one of the most widely used compilers .

This routine is not the same effect as what I tossed around , The parameters used are also different . About windows The reason for failure in the environment is also very clear , install VS Provide default compiler selection or modify environment variables $CC. No modification , If you do this, you will have the same effect as before .

The code involved ：

hello.c

#include "stdio.h"

int main(void)

{

printf("hello world!\n");

return 0;

}