Re: passing variable values to subsequent make calls

[Paul D. Smith]

%% "Robert P. J. Day" <address@hidden> writes:

  rpjd>   if, in some makefile, i use

  rpjd>         ${MAKE} ARCH=ppc <subdir>

  rpjd> is it correct that that variable will only be visible just to
  rpjd> that subdirectory make unless i explicitly set it again for
  rpjd> further recursive calls?

No.  Variables set on the command line are also set as if they were on
the command line of all recursive make invocations.

Otherwise top-level commands like:

    make CFLAGS=-g

would not do the right thing.

  rpjd>   finally, i see in the make docs the construct:

  rpjd>         MAKE := ${MAKE} ARCH=ppc 

  rpjd> does this mean that, wherever i use the ${MAKE} invocation in
  rpjd> any recursive makefile, that ARCH is automatically defined for
  rpjd> all sub-makes all the way down?

Yes... this is identical to your first example, where ARCH=ppc is added
to the command line directly.

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