(not) building hello with makepp

[Daniel Pfeiffer]

 Hi,

I am currently getting makepp <makepp.sf.net> fit for V2.0 and one of the 
tasks is to make true on the promise of gmake compatibility.  I have sorted 
out two minor incompatibilities with autotools but am now facing something harder:

The premise of makepp is a 100% reliable build.  For this it scans all sources 
to have a complete list of dependencies.  (There are many other features like 
signature based build decisions, but they are not important here.)

The point is gnulib as embedded in hello offers rules to make alternate 
versions of many standard header files.  Gmake ignores these unless 
specifically being requested to build them.  Makepp otoh. finds that they are 
needed in the sources, so it tries to build them in the first possible 
directory where the compiler would look for them, i.e. the ones provided by 
you.  Alas they cause compiler errors on Gnu/Linux.

My request is to write the Makefile.am so that only the rules for needed 
headers get copied to Makefile.  Alas I am good at Makefiles but not at 
automake...

Alternately surround each rule with an ifndef HAVE_foobar_H.  That would break 
portability to other Posix makes, though you also use Gnu fileutils specific 
options, so that doesn't seem to be an issue.

coralament / best Grötens / liebe Grüße / best regards / elkorajn salutojn
Daniel Pfeiffer

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