[Libevent-users] Re: undefined reference to event_base_add

Sorry for the truncated email.

Getting a linker error using libevent 2.1:

marcog@marcog-VirtualBox:~/Cometa/cometa-mt/server$ make

cc -Wall -g -I./include -L/usr/local/lib -levent -o cometa cometa.o request.o http_parser.o config.o rsyslog.o response.o routes.o api.o info.o webhooks.o websockets.o -l:libevent-2.1.so.5 Â-l:libevent_pthreads-2.1.so.5 -lpthread -lcrypto -lm -ldl -lwebsock -lconfig -lssl -lworkqueue -lbeanstalkÂ

/usr/bin/ld: cometa.o: undefined reference to symbol 'event_base_add_virtual'

/usr/local/lib/libevent-2.0.so.5: error adding symbols: DSO missing from command line

collect2: error: ld returned 1 exit status

make: *** [cometa] Error 1

While everything is fine with libevent 2.0:

marcog@marcog-VirtualBox:~/Cometa/cometa-mt/server$ make

cc -Wall -g -I./include -L/usr/local/lib -levent -o cometa cometa.o request.o http_parser.o config.o rsyslog.o response.o routes.o api.o info.o webhooks.o websockets.o -l:libevent-2.0.so.5 Â-l:libevent_pthreads-2.0.so.5 -lpthread -lcrypto -lm -ldl -lwebsock -lconfig -lssl -lworkqueue -lbeanstalkÂ

The symbol is defined in both libraries:

marcog@marcog-VirtualBox:~$ nm Â/usr/local/lib/libevent-2.1.so.5 Â| grep event_base_add_virtual

0000000000022b80 T event_base_add_virtual_

marcog@marcog-VirtualBox:~$ nm Â/usr/local/lib/libevent-2.0.so.5 Â| grep event_base_add_virtual

00000000000134f0 T event_base_add_virtual

And the linker cache seems fine:

marcog@marcog-VirtualBox:~/Cometa/cometa-mt/server$ ldconfig -p | grep libevent

libevent_pthreads-2.1.so.5 (libc6,x86-64) => /usr/local/lib/libevent_pthreads-2.1.so.5

libevent_pthreads-2.0.so.5 (libc6,x86-64) => /usr/local/lib/libevent_pthreads-2.0.so.5

libevent_openssl-2.1.so.5 (libc6,x86-64) => /usr/local/lib/libevent_openssl-2.1.so.5

libevent_extra-2.1.so.5 (libc6,x86-64) => /usr/local/lib/libevent_extra-2.1.so.5

libevent_extra-2.0.so.5 (libc6,x86-64) => /usr/local/lib/libevent_extra-2.0.so.5

libevent_core-2.1.so.5 (libc6,x86-64) => /usr/local/lib/libevent_core-2.1.so.5

libevent_core-2.0.so.5 (libc6,x86-64) => /usr/local/lib/libevent_core-2.0.so.5

libevent-2.1.so.5 (libc6,x86-64) => /usr/local/lib/libevent-2.1.so.5

libevent-2.0.so.5 (libc6,x86-64) => /usr/local/lib/libevent-2.0.so.5

I am considering 2.1 because of a deadlock with a bufferevent implicit lock (using flags BEV_OPT_CLOSE_ON_FREE | BEV_OPT_THREADSAFE)) with a pthread write lock.

Any suggestion would be greatly appreciated.

-Marco G.

Marco Graziano | Founder & CEO | Visible Energy, Inc. |Â530 Lytton Avenue, 2nd Floor, Palo Alto, CA 94301
Tel: (650)353-7812ÂÂ| Cell: (650)644-8867
Before you print this email or/ attachments, please consider the negative environmental impacts associated with printing.Â

On Tue, Feb 10, 2015 at 8:32 AM, Marco Graziano <marco@xxxxxxxxxxxxxxxx> wrote:

Getting a linker error using libevent 2.1:

marcog@marcog-VirtualBox:~/Cometa/cometa-mt/server$ make
cc -Wall -g -I./include -L/usr/local/lib -levent -o cometa cometa.o request.o http_parser.o config.o rsyslog.o response.o routes.o api.o info.o webhooks.o websockets.o -l:libevent-2.1.so.5 Â-l:libevent_pthreads-2.1.so.5 -lpthread -lcrypto -lm -ldl -lwebsock -lconfig -lssl -lworkqueue -lbeanstalkÂ
/usr/bin/ld: cometa.o: undefined reference to symbol 'event_base_add_virtual'
/usr/local/lib/libevent-2.0.so.5: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make: *** [cometa] Error 1

While everything is fine with libevent 2.0:

marcog@marcog-VirtualBox:~/Cometa/cometa-mt/server$ make
cc -Wall -g -I./include -L/usr/local/lib -levent -o cometa cometa.o request.o http_parser.o config.o rsyslog.o response.o routes.o api.o info.o webhooks.o websockets.o -l:libevent-2.0.so.5 Â-l:libevent_pthreads-2.0.so.5 -lpthread -lcrypto -lm -ldl -lwebsock -lconfig -lssl -lworkqueue -lbeanstalkÂ

The symbol is defined in both libraries:

Â
Marco Graziano | Founder & CEO | Visible Energy, Inc. |Â530 Lytton Avenue, 2nd Floor, Palo Alto, CA 94301
Tel: (650)353-7812ÂÂ| Cell: (650)644-8867
Before you print this email or/ attachments, please consider the negative environmental impacts associated with printing.Â

[Libevent-users] Re: undefined reference to event_base_add_virtual in libevent 2.1