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Subject: Re: help with dl module and clang
From: Daniel Braniss <danny@cs.huji.ac.il>
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Date: Sat, 3 Nov 2018 17:58:17 +0200
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To: Dimitry Andric <dim@FreeBSD.org>
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> On 3 Nov 2018, at 17:47, Dimitry Andric <dim@FreeBSD.org> wrote:
>=20
> On 3 Nov 2018, at 15:51, Daniel Braniss <danny@cs.huji.ac.il> wrote:
>>=20
>> I have a program that loads some modules via dlopen(),  these modules =
call some routines
>> which are in the main program, this works when using gcc, but with cc =
it does not.
>>=20
>> when compiling the main program I use  -export-dynamic, and the =
modules link fine when compiled with
>> gcc, but when compiling with clang/cc i get dlerror: ...Undefined =
symbol =E2=80=A6
>> BTW, when linking the main program with cc I get
>> 	/usr/bin/ld: warning: cannot find entry symbol xport-dynamic; =
defaulting to 0000000000402140
>=20
> Instead of using -export-dynamic (which is a linker flag) as a flag to
> cc, try using -Wl,-export-dynamic instead.  Now, the linker interprets
> this as the -e flag, which is something totally different.
>=20

i had tried that before but i had -WI (upper case i) but re-reading the =
manual
it should be-Wl (lower case l as in lima :-))!!!!!

thanks!!!!!!

and now have to try profiling (gprof) which started this mess,

thanks again!!

danny


> I think this will also help with the exporting of the symbols of your
> main program.
>=20
> -Dimitry
>=20