Paul D. Smith wrote:
%% Joost Leeuwesteijn <[EMAIL PROTECTED]> writes:
jl> You can check if make is run from the root directory by including a
jl> first/default rule in the dir1 makefile that stops the build. Something
jl> like:
jl> ----------------------------------------
jl> .PHONY : dir1_default_rule
jl> dir1_default_rule :
jl> echo "ERROR: only run the toplevel makefile"
jl> <not sure what's the best way to bail out (exit 1?, $$(error ...)>
jl> and/or check on a variable that must be set by the toplevel makefile and
jl> call $(error ...)
jl> ----------------------------------------
You could instead check the MAKELEVEL variable to see whether this is
the top-level make, or a recursive invocation.
If you also want to rule out the single (sub)makefile "execution" you
can't use MAKELEVEL, I believe. If you run 'make -f submakefile' the
MAKELEVEL would still indicate toplevel make (right?), but I was trying
to force execution of the toplevel makefile only. By bailing out in the
default rule, or checking a variable that should be set by the toplevel
makefile before including the submakefiles. If you execute the
submakefile on it's own, I need to bail out because of variables that
are supposed to be set from the toplevel makefile.
I was talking about the include situation, not recursion. My build
environment doesn't use recursion; seems to be harmful ;-)
Regards,
Joost
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