I just noticed this in 2.0 - maybe it was true before and I never noticed:

$ cat Makefile
foo : bar
        echo $$$$
        echo $$$$
        cd /tmp
        pwd
$ make
echo $$
6221
echo $$
14194
cd /tmp
make: exec(cd) failed (No such file or directory)
*** Error code 1

Stop.

That looks like old-style compatibility behavior, so I guess that's the
default--but neither 'man make' nor /usr/share/doc/psd/12.make/tutorial.ms
quite told me that.  I did see in 'man make' that -j will turn compatibility
mode off, and that works:

$ make -j1                                                 
echo $$
7571
echo $$
7571
cd /tmp
pwd
/tmp

Now a single shell is used, and the cd works.

Is there any way I can indicate inside a makefile that I want the newer
semantics, or do I always have to remember -j1 on the command line or
export it in MAKEFLAGS from the shell?  I didn't expect MAKEFLAGS += -j1
in the makefile to work, and I was right, it didn't.

Does this mean all the times I've built kernels without giving -j, I've
been running make in compatibility mode ... ?

-Chap