Slackware15

Linux slack15.local 5.15.1 #1 SMP PREEMPT Sat Nov 6 14:39:05 CDT 2021
x86_64 GNU/Linux

I'm trying to install Dean Jones' email program -
https://github.com/deanproxy/eMail

Compiles OK on Raspbian and LMDE4

On Slackware (and VOID) I am getting errors from the linker - ld - like
this:

/usr/bin/ld:
addr_parse.o:/home/chris/Downloads/eMail/include/email.h:81: multiple
definition of `Mopts';
email.o:/home/chris/Downloads/eMail/include/email.h:81: first defined here
/usr/bin/ld:
addr_parse.o:/home/chris/Downloads/eMail/include/email.h:65: multiple
definition of `conf_file';
email.o:/home/chris/Downloads/eMail/include/email.h:65: first defined here
/usr/bin/ld:
addr_parse.o:/home/chris/Downloads/eMail/include/email.h:64: multiple
definition of `table';
email.o:/home/chris/Downloads/eMail/include/email.h:64: first defined here

These messages repeat for each .o file in src/

addr_parse.o addy_book.o conf.o error.o execgpg.o file_io.o message.o
mimeutils.o processmail.o progress_bar.o remotesmtp.o sig_file.o
smtpcommands.o utils.o

Any ideas what could be wrong? Anyone else tried compiling this program?

Later: I transferred all the installed files from the LMDE computer to
the Slackware computer, and it seems to work, so at least I've got a
working program.

Thanks

--
Chris Elvidge
England

Chris Elvidge wrote on 11/8/21 4:57 PM:
> Slackware15
>
> Linux slack15.local 5.15.1 #1 SMP PREEMPT Sat Nov 6 14:39:05 CDT 2021 x86_64 GNU/Linux
>
> I'm trying to install Dean Jones' email program - https://github.com/deanproxy/eMail
>
> Compiles OK on Raspbian and LMDE4
>
[...]

don't know why this is on slackware, but anyway:
change include/email.h from line 81 to:
/* Globally defined vars */
extern dhash table;
extern char *conf_file;

extern struct mailer_options {
bool verbose;
bool encoding;
short html;
short priority;
short receipt;
short blank;
GpgCallType gpg_opts;
char *subject;
dlist attach;
dlist headers;
dlist to;
dlist cc;
dlist bcc;
} Mopts

and insert into src.email.c (after the #inlude... lines):
dhash table;
char *conf_file;

struct mailer_options Mopts ;

maybe this guy should read a book about C :-P

Ralph Spitzner <rasp@spitzner.org> writes:
> Chris Elvidge wrote on 11/8/21 4:57 PM:
>> Slackware15
>>
>> Linux slack15.local 5.15.1 #1 SMP PREEMPT Sat Nov 6 14:39:05 CDT
>> 2021 x86_64 GNU/Linux
>>
>> I'm trying to install Dean Jones' email program -
>> https://github.com/deanproxy/eMail
>>
>> Compiles OK on Raspbian and LMDE4
>
> [...]
>
> don't know why this is on slackware, but anyway:

> change include/email.h from line 81 to:
[...]
> maybe this guy should read a book about C :-P

It used to work (and presumably can still work if you turn -fcommon back
on).

https://gcc.gnu.org/gcc-10/porting_to.html

--
https://www.greenend.org.uk/rjk/

Richard Kettlewell wrote on 11/9/21 10:50 AM:

> It used to work (and presumably can still work if you turn -fcommon back
> on).
>

ah, ok, "CFLAGS=-fcommon ./configure"

does do it.

cite from gnu.org:
"It is mainly useful to enable legacy code to link without errors."

what standard is this (legacy) k&r ?

-rasp

Ralph Spitzner <rasp@spitzner.org> writes:
> Richard Kettlewell wrote on 11/9/21 10:50 AM:
>
>> It used to work (and presumably can still work if you turn -fcommon back
>> on).
>>
>
> ah, ok, "CFLAGS=-fcommon ./configure"
>
> does do it.
>
> cite from gnu.org:
> "It is mainly useful to enable legacy code to link without errors."
>
> what standard is this (legacy) k&r ?

No standard. Even first edition K&R forbids the duplication (s11.2 para
2). It’s just something that mostly worked for a long time.

--
https://www.greenend.org.uk/rjk/

On 09/11/2021 09:50 am, Richard Kettlewell wrote:
> Ralph Spitzner <rasp@spitzner.org> writes:
>> Chris Elvidge wrote on 11/8/21 4:57 PM:
>>> Slackware15
>>>
>>> Linux slack15.local 5.15.1 #1 SMP PREEMPT Sat Nov 6 14:39:05 CDT
>>> 2021 x86_64 GNU/Linux
>>>
>>> I'm trying to install Dean Jones' email program -
>>> https://github.com/deanproxy/eMail
>>>
>>> Compiles OK on Raspbian and LMDE4
>>
>> [...]
>>
>> don't know why this is on slackware, but anyway:
>
>> change include/email.h from line 81 to:
> [...]
>> maybe this guy should read a book about C :-P
>
> It used to work (and presumably can still work if you turn -fcommon back
> on).
>
> https://gcc.gnu.org/gcc-10/porting_to.html
>

Thanks for that.
It was the change to GCC that caused it.
Slackware 15 is on 11.2, Debian is still on 8.3

--
Chris Elvidge
England

Chris Elvidge <chris@mshome.net> writes:
> It was the change to GCC that caused it.
> Slackware 15 is on 11.2, Debian is still on 8.3

Debian stable has GCC 10.

https://packages.debian.org/bullseye/gcc

--
https://www.greenend.org.uk/rjk/