MakeMaker will not work without $Config{archdir}/CORE/perl.h. Period. It just gives up and dies, won't even build the Makefile.
] sudo mv /System/Library/Perl/darwin/CORE/perl.h /tmp
] perl Makefile.PL
Error: Unable to locate installed Perl libraries or Perl source code.
It is recommended that you install perl in a standard location before building extensions. Some precompiled versions of perl do not contain these header files, so you cannot build extensions. In such a case, please build and install your perl from a fresh perl distribution. It usually solves this kind of problem.
(You get this message, because MakeMaker could not find "/System/Library/Perl/darwin/CORE/perl.h")
This happens XS or not.
Later on it uses perl.h for some odd timestamp ritual in the Makefile.
config :: $(INST_AUTODIR)$(DIRFILESEP).exists $(NOECHO) $(NOOP)
$(INST_AUTODIR)/.exists :: /System/Library/Perl/darwin/CORE/perl.h
$(NOECHO) $(MKPATH) $(INST_AUTODIR)
$(NOECHO) $(EQUALIZE_TIMESTAMP) /System/Library/Perl/darwin/CORE/perl.h $(INST_AUTODIR)/.exists
-$(NOECHO) $(CHMOD) $(PERM_RWX) $(INST_AUTODIR)
Is this trip really necessary? What exactly is going on here and is it relevant outside of a core build?
I ask because some vendors don't ship the perl headers. Most recently I got a scare when it appeared that Apple was not going to ship perl.h with perl in 10.3 (its not, but it didn't in 10.2 either. Its in devtools).
So I'd like to break this hard-wired dependency so MakeMaker can install pure Perl modules without perl.h, but I don't want to just rip it out.
Andreas, do you know what this .exists stuff is all about? It looks like its checking to see if Perl got reinstalled.
I think it checks whether perl is more recent than Makefile and forces rebuild if that's the case. May be if perl.h is not there one should check whether $^X is newer than Makefile?
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