OT: Linux shared lib question
e-t172
e-t172 at akegroup.org
Tue May 13 03:50:59 PDT 2008
Bill Baxter a écrit :
> So I figured if it can do that then surely this would work:
>
> gcc -shared -Wl,-soname,lib${name}.so.1 -o lib${name}.so.1.1 \
> libmylibrary.a
>
> where libmylibrary.a is a lib containing a.o, b.o, and c.o. After all a
> .a archive is basically just a concatenation of .o files in a convenient
> package.
>
> However, though the command runs without reporting an error, the
> resulting .so does not contain the contents of libmylibrary.a.
man ld:
"--whole-archive
For each archive mentioned on the command line after the --whole-archive
option, include every object file in the archive in the link, rather
than searching the archive for the required object files. This is
normally used to turn an archive file into a shared library, forcing
every object to be included in the resulting shared library. This
option may be used more than once.
Two notes when using this option from gcc: First, gcc doesn’t know
about this option, so you have to use -Wl,-whole-archive. Second, don’t
forget to use -Wl,-no-whole-archive after your list of
archives, because gcc will add its own list of archives to your link
and you may not want this flag to affect those as well."
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