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From: Jean-Pierre Flori <jpflori AT gmail DOT com>
Date: Thu, 9 Jan 2014 18:14:17 +0100
Message-ID: <CAHhGz8-KiNuY+2oA7RTcokedT-WpdNYZ+4Z60hwwoz40y_Ombw@mail.gmail.com>
Subject: Troubles building PPL 1.0 on Cygwin64
To: cygwin AT cygwin DOT com
Content-Type: text/plain; charset=UTF-8

Dear all,

I'm having issues building PPL (or more exactly the C interface of
PPL) on Cygwin64 (1.7.27, gcc/g++ 4.8.2).

It fails with undefined reference to ppl_unreachable() (defined in
src/assert.cc/hh) when linking the C interface (cygppl_c in
interfaces/C).
Note that this function is present as a weak symbol in cygppl.dll, but
does not appear in the import library libppl.dll.a, so that's surely
the issue here.
Disabling all the weak symbols magic in src/ppl.hh let ppl and its C
interface compile.
Note that PPL actually tests that weak symbols are supported, so it
thought it would be ok, and indeed the symbol is here n the shared
lib, but in the end it did not make into the import lib.

What's surprising is that I had no issues with Cygwin32.
So is gcc/g++/ld/binutils configured/behaving differently?

Thanks in advance for your help.
Best,

-- 
Jean-Pierre Flori

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