The strange echo command in makefile, may due to bash 4. Please help.

[Chen Jun (陈军)]

Hi, everyone. I run into a problem today. I have a very simple makefile:

-------------
all:
   @echo -e "line1\n"
-------------

On openSUSE 11.1, it outputs

line1

But on Ubuntu 9.10, it outputs

-e line1

NOTE the preceeding -e !

If I execute   echo -e "line1";  directly on Bash command line of both 
Linux, they both outputs "line1" only. In this case, I know /bin/echo is 
actually executed.

The difference between the two Linux I can speculate is the Bash 
version: SUSE has bash 3.2.39, while Ubuntu has 4.0.33 . And GNU make 
3.81 try to use bash'es internal echo command in the  above makefile sample.

So, I'd like to always use external echo in my makefile, but don't let 
me change every occurrence of "echo" to "/bin/echo". Can somebody help?