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[perl #132955] USE_CPLUSPLUS build broken in 5.27 blead and all 5.26stables

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From:
Steve Hay via RT
Date:
April 23, 2018 12:59
Subject:
[perl #132955] USE_CPLUSPLUS build broken in 5.27 blead and all 5.26stables
Message ID:
rt-4.0.24-6080-1524488360-1368.132955-15-0@perl.org
On Fri, 20 Apr 2018 17:23:46 -0700, bulk88 wrote:
> On Thu, 19 Apr 2018 23:08:56 -0700, bulk88 wrote:
> > I still can't build C++ perl because of PL_nan wrong declaration by
> > jhi
> > https://perl5.git.perl.org/perl.git/commitdiff/0879cd66ef3f00918ae26d9bb7ac555d3911c548
> > . The lvalue cast and C++11 postfix operator space issues were found
> > by others, not me.
> 
> I'm starting to think
> https://perl5.git.perl.org/perl.git/commitdiff/0879cd66ef3f00918ae26d9bb7ac555d3911c548
> needs to be reverted outright. PL_nan/PL_inf must be either const and
> in globvar.sym or perlvars.h and RT inited. There are only 2 kinds of
> global vars in perl API. PL_nan/PL_inf should match existing
> infrastructure. Not special casing itself. Something about the jhi
> vax-netbsd series of commits doesn't make sense. On a C++ build, why
> does it matter if perl's core symbols are C mangled or C++ mangled by
> the CC/LD, aslong as its all declared the same way in every .o? How
> does the rest of globvar.sym global vars work with just EXTCONST (C++
> sym name) but not "EXTERN_C const" on vax-netbsd platform? Is POSIX.xs
> compiled in C mode even on a C++ perl or something with EUMM CFLAGS
> changes? Is anyone but JHI able to compile perl for vax-netbsd?

I asked Jarkko about that commit. He suggested reverting it, but double checking that the whole thing then still builds also for Linux using g++.

Is anyone able to do that? (Presumably I could do it on dromedary, but wouldn't really know what I'm doing -- I've not built perl on anything UNIXy for many, many years.)

---
via perlbug:  queue: perl5 status: open
https://rt.perl.org/Ticket/Display.html?id=132955

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