>Does Solaris and/Or Sun Studio have any linker/compiler flags to warn
>users if a library or other code defines a symbol which is already used
>by libc ?
>For example MacOSX seems to create the following output when you define
>|strtol| in an application library (this is from
>https://mailman.research.att.com/pipermail/ast-developers/2006q3/000138.html):
>-- snip --
>ld: warning multiple definitions of symbol _strtol
>/home/pdragosh/src/pads-1.1/ast-ast/arch/darwin7.ppc/lib/libast.a(strtol.o)
>definition of _strtol in section (__TEXT,__text)
>/usr/lib/libSystem.dylib(strtol.So) definition of _strtol
>ld: warning multiple definitions of symbol _strtoul
>/home/pdragosh/src/pads-1.1/ast-ast/arch/darwin7.ppc/lib/libast.a(strtoul.o)
>definition of _strtoul in section (__TEXT,__text)
>/usr/lib/libSystem.dylib(strtoul.So) definition of _strtoul
>-- snip --
>
>I'd like to get similar output in Solaris - is that somehow possible ?
Multiple definitions within dynamic objects is allowed, hence there
are no error/warning messages given. But you can get the information.
% man ld
.....
-m
Produces a memory map or listing of the input/output
sections, together with any non-fatal multiply-defined
symbols, on the standard output.
.....
% cat main.c
long strtol()
{
return (0);
}
void main(){}
% cc -Wl,-m -o main main.c | tail -20
MULTIPLY DEFINED SYMBOLS
symbol definition used also defined in
__environ_lock /SUNWspro/lib/crt1.o
/lib/libc.so
___Argv /SUNWspro/lib/crt1.o
/lib/libc.so
strtol main.o
/lib/libc.so
environ /SUNWspro/lib/crt1.o
/lib/libc.so
_environ /SUNWspro/lib/crt1.o
/lib/libc.so
--
Rod.
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