Gentoo Archives: gentoo-dev

From: Ciaran McCreesh <ciaran.mccreesh@××××××××××.com>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] RFC: --as-needed to default LDFLAGS (Was: RFC: Should preserve-libs be enabled by default?)
Date: Sat, 31 May 2008 00:03:09
Message-Id: 20080531010259.52b8c105@snowcone
In Reply to: Re: [gentoo-dev] RFC: --as-needed to default LDFLAGS (Was: RFC: Should preserve-libs be enabled by default?) by Luca Barbato
1 On Sat, 31 May 2008 01:54:45 +0200
2 Luca Barbato <lu_zero@g.o> wrote:
3 > > ISO/IEC 14882:1998 section 3.7.1 paragraph 2.
4 >
5 > "If an object of static storage duration has initialization or a
6 > destructor with side effects, it shall not be eliminated even if
7 > it appears to be unused, except that a class object or its copy
8 > may be eliminated as specified in 12.8."
9 >
10 > Unchanged in the 2003 revision.
11 >
12 > Is that related to linking? I don't think so.
13
14 Linking with as-needed is the stage in which the elimination occurs,
15 and as-needed is the cause of the elimination. So yes, it is related.
16
17 > Still, PE and ELF are older than the first C++ spec so, IFF your
18 > reading of this chapter is correct, C++ is broken by design.
19
20 Not at all. Read "The Design and Evolution of C++", and you shall see
21 that requiring changes to the linker where necessary for sensible
22 behaviour was considered acceptable, and with good reason.
23 --
24 Ciaran McCreesh

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