Conditional tests based on ${MACHINE} and ${MACHINE_ARCH}

[Paul Goyette <paul%whooppee.com@localhost>]

There are some tests which don't apply to every architecture, i.e., the 
tests in lib/libc/ieeefp/ and lib/libc/gen/ldexp (which probably should 
be moved to ieeefp).  The old "regress" structure dealt with these by 
simply not building the tests; since no tests were installed in the old 
structrue, there was no need to be concerned with the sets-lists.

However, moving these tests to atf means that things do get installed, 
and we now have to deal with conditionalizing the sets lists if the 
tests themselves are conditionally built.  A test that gets built "for 
everything except vax" would need to get added to 18 out of 19 files [1]
in distrib/sets/lists/tests/md.*  (I currently have added libc/gen/ldexp 
which is probably breaking the build for vax people.)

Havard suggest an alternative - have the test (or framework) be able to 
make these checks at run-time.  Maybe something could be added to the 
Atffile ?  Or at the very least, atf could create config_variables that 
the tests could check?

Comments?



[1] Our ${MACHINE_ARCH} list includes: arm, armeb, hppa, m68000, m68k, 
mipsel, mipseb, mips64el, mips64eb, powerpc, powerpc64, sh3el, sh3eb, 
x86_64, alpha, i386, sparc, sparc64, and vax



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