Re: Help-make Digest, Vol 80, Issue 6

[CHEN Cheng]

On Wed, Jul 08, 2009 at 10:28:25AM +0800, xiangfeng shen wrote:
> Hi,
> 
> I encounter a use of 'set -e' in make file shell.
> such as:
> all:
>     set -e; cmd1; cmd2; cmd3
> 
> Does the 'set -e' means open error for cmd chain?
I think you are right if you're using bash in make. The bash docs say:
    "-e  Exit immediately if a command exits with a non-zero
        status."

> And does the above rule similiar with next one?
> all:
>     cmd1 && cmd2 && cmd3
I ran tests as below:

$ (set -e; ls abcdefg; ls abcdefg.2; ls abcdefg.3)
stop with cmd1.

$ (ls abcdefg; ls abcdefg.2; ls abcdefg.3)
no stop.

$ (ls abcdefg && ls abcdefg.2 && ls abcdefg.3)
stop with cmd1.

So, as the results show, they're similar.