You have got a set programs, each of which is created from
its own assembly-language source file (suffix
.asm). Each program can be assembled into
two versions, one with error-checking code assembled in and one
without. You could assemble them into files with different
suffixes (.eobj and
.obj, for instance), but your linker only
understands files that end in .obj. To top
it all off, the final executables must have the suffix
.exe. How can you still use
transformation rules to make your life easier (Hint: assume the
errorchecking versions have ec tacked onto their prefix)?
Assume, for a moment or two, you want to perform a sort of “indirection” by placing the name of a variable into another one, then you want to get the value of the first by expanding the second somehow. Unfortunately, PMake does not allow constructs like:
$($(FOO))
What do you do? Hint: no further variable expansion is
performed after modifiers are applied, thus if you
cause a $ to occur in the expansion,
that is what will be in the result.
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