Date: Wed, 24 Sep 2014 20:57:17 +0200 From: Matthias Andree <matthias.andree@gmx.de> To: freebsd-ports@freebsd.org Cc: Konstantin Belousov <kostikbel@gmail.com> Subject: Re: Need help compiling use of std::vector Message-ID: <5423140D.8080005@gmx.de> In-Reply-To: <5422DD61.4030808@ShaneWare.Biz> References: <5422DD61.4030808@ShaneWare.Biz>
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Am 24.09.2014 um 17:04 schrieb Shane Ambler:
> I am trying to compile the new version of a port I maintain and have
> trouble related to std::vector. The code producing the error can be
> boiled down to the following test case, which compiles as 64bit but
> fails as 32bit.
>
> #include <stdlib.h>
> #include <vector>
>
> int main(int argc, char *argv[])
> {
> int num_layers = 3;
> std::vector<const char *> layers (num_layers, NULL);
>
> exit(0);
> }
>
> So that should create a vector containing 3 items initially set to NULL.
>
> 10.0 compiles ok - both 32 and 64 bit. (libc++)
> 8.4, 9.2 and 9.3 compiles 64bit but fails on 32bit. (libstdc++)
>
> Using the above code
> clang++ -m32 test.cpp
> fails with
>
> /usr/include/c++/4.2/bits/stl_algobase.h:641:15: error: assigning to
> 'const char *' from incompatible type 'const int'
I don't think "-m32" compilation has ever worked properly for C++ on the
older FreeBSD releases, where older includes 9.3.
You're probably better off trying to build with 32-bit chroots or jails
on your 64-bit host, like poudriere or Tinderbox are doing (but I'm not
sure if they support setting up 32-bit jails on 64-bit computers).
See here
<https://lists.freebsd.org/pipermail/freebsd-stable/2009-September/051855.html>;
so it's a long-standing thing, and for "recent" developments:
<https://lists.freebsd.org/pipermail/freebsd-current/2013-June/042378.html>;
-so that would have been for 10-CURRENT at the time, and hints that the
headers weren't pure enough for -m32 and similar tricks.
I am not aware that this effort was ever MFH'd.
I am Cc'ing Konstantin Belousov in case he wants to shed more light on
this issue.
HTH
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