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Re: two instances of global from shared lib linked with -Bsymbolic
From: |
Rafal Dabrowa |
Subject: |
Re: two instances of global from shared lib linked with -Bsymbolic |
Date: |
Thu, 8 Apr 2004 10:09:56 +0200 |
User-agent: |
KMail/1.6.1 |
On Wednesday 07 of April 2004 15:47, Ian Lance Taylor wrote:
> I personally think that the ELF
> behaviour is simpler to understand: if the main program and a shared
> library use the same name for a global variable, then they refer to
> the same global variable.
I don't think so. Compare with C/C++ rules:
- if a function defines variable with the same name as a global
variable,
the local variable is used when refer to variable name.
- if a class has defined variable/function with the same name/prototype
as
the global one, the class member is used by default when another
member
function uses it.
- similar - namespaces.
A shared library is like a namespace. When you write in C++:
namespace A {
void f() { ... }
void g() { f(); }
}
namespace B {
using namespace A;
void f() { ... }
void h() { g(); }
}
Thinking in the same way, as you think about shared libraries. "because
namespace B uses namespace A (like link of shared library), then B::f
overrides A::f in B, thus, function A::g invoked from B::h uses B::f".
Right ? Do you think that this would be easier to understand ?
Did you never thought, that function/variable names may simply clash ?
Rafal
- Re: two instances of global from shared lib linked with -Bsymbolic, (continued)
- Re: two instances of global from shared lib linked with -Bsymbolic, Rafal Dabrowa, 2004/04/06
- Re: two instances of global from shared lib linked with -Bsymbolic, Ian Lance Taylor, 2004/04/06
- Re: two instances of global from shared lib linked with -Bsymbolic, Rafal Dabrowa, 2004/04/06
- Re: two instances of global from shared lib linked with -Bsymbolic, Ian Lance Taylor, 2004/04/06
- Re: two instances of global from shared lib linked with -Bsymbolic, Alan Modra, 2004/04/06
- Re: two instances of global from shared lib linked with -Bsymbolic, Ian Lance Taylor, 2004/04/06
- Re: two instances of global from shared lib linked with -Bsymbolic, Alan Modra, 2004/04/06
- Re: two instances of global from shared lib linked with -Bsymbolic, Rafal Dabrowa, 2004/04/07
- Re: two instances of global from shared lib linked with -Bsymbolic, Alan Modra, 2004/04/07
- Re: two instances of global from shared lib linked with -Bsymbolic, Ian Lance Taylor, 2004/04/07
- Re: two instances of global from shared lib linked with -Bsymbolic,
Rafal Dabrowa <=
- Re: two instances of global from shared lib linked with -Bsymbolic, Ian Lance Taylor, 2004/04/08