undefined reference to `ulfius_websocket_wait_close'

[alexe100]

Hi After compiling ulfius as:

cd orcania/ make && sudo make install cd ../yder/ make && sudo make install cd ../ulfius/ mkdir build cd build cmake .. make && sudo make install

when I compile a program with websockets support:

... -lulfius -lorcania -ljansson -lyder

I get:

undefined reference to ulfius_websocket_wait_close' undefined reference toulfius_websocket_send_message' undefined reference to ulfius_websocket_wait_close' undefined reference toulfius_websocket_send_fragmented_message' undefined reference to ulfius_websocket_wait_close' undefined reference toulfius_websocket_send_message' undefined reference to ulfius_websocket_wait_close' undefined reference toulfius_websocket_send_message'

Thanks Alex

[babelouest]

Hello,

Websocket support must have been disabled because of missing dependencies. Do you have all the libraries required with the correct version? What system are you using?

[alexe100]

Linux ubuntu.Where is the info about those extra libs that must be installed and updated?

[alexe100]

Doing a make clean and make all on the websocket sample, there is no error. Then: ./websocket_client Websocket not supported, please recompile ulfius with websocket support

Cmaking again:

$cmake .. -- Found Jansson: /usr/lib/x86_64-linux-gnu/libjansson.so (found version "2.12") -- Found Jansson: /usr/lib/x86_64-linux-gnu/libjansson.so (found suitable version "2.12", minimum required is "2.4") -- GNU TLS support: ON -- Websocket support: ON -- Outgoing requests support: ON -- Jansson library support: ON -- Yder support: ON -- Build uwsc application: ON -- Build static library: OFF -- Build testing tree: OFF -- Install the header files: ON -- Build RPM package: OFF -- Build documentation: OFF -- Configuring done -- Generating done

[babelouest]

Your cmake log is ok, websocket and uwsc are enabled.

The install documentation may help you with the requirements: https://github.com/babelouest/ulfius/blob/master/INSTALL.md#prerequisites

If it possible that you already have installed ulfius via the Ubuntu package?

[alexe100]

No, I always prefer buld from source. Hence apart from this command:

apt-get install libmicrohttpd-dev libjansson-dev libcurl4-gnutls-dev libgnutls28-dev libgcrypt20-dev

No other apt command was used to instal something related with ulfius. By the way, I have executed again the command above and the result is:

Reading package lists... Done Building dependency tree
Reading state information... Done libjansson-dev is already the newest version (2.12-1build1). libmicrohttpd-dev is already the newest version (0.9.62-1). libcurl4-gnutls-dev is already the newest version (7.64.0-2ubuntu1.2). libgcrypt20-dev is already the newest version (1.8.4-3ubuntu1.1). libgcrypt20-dev set to manually installed. libgnutls28-dev is already the newest version (3.6.5-2ubuntu1.1). 0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.

I am goinf to try to find all libulfius.so files on the system and delete them and then build ulfius again...

By the way I have these ones:

/usr/local/lib/libulfius.so.2.6 /usr/local/lib/libulfius.so.2.6.5 /usr/local/lib/libulfius.so

no... after rebuild it all I tried to execute websocket client sample and got:

Websocket not supported, please recompile ulfius with websocket support

[babelouest]

What does your ulfius-cfg.h says? It must be in the same folder where ulfius.h is installed: /usr/include or /usr/local/include

Also, what is the output of the make command?

[alexe100]

$sudo find / -iname 'ulfius-cfg.h' /usr/local/include/ulfius-cfg.h /usr/include/ulfius-cfg.h

$sudo find / -iname 'ulfius.h' /usr/local/include/ulfius.h /usr/include/ulfius.h

$cat /usr/include/ulfius-cfg.h

ifndef _ULFIUS_CFGH

define _ULFIUS_CFGH

define ULFIUS_VERSION 2.6.5

define ULFIUS_VERSION_STR "2.6.5"

define ULFIUS_VERSION_MAJOR 2

define ULFIUS_VERSION_MINOR 6

define ULFIUS_VERSION_PATCH 5

define ULFIUS_VERSION_NUMBER ((ULFIUS_VERSION_MAJOR << 16) | (ULFIUS_VERSION_MINOR << 8) | (ULFIUS_VERSION_PATCH << 0))

/ #undef U_DISABLE_JANSSON / / #undef U_DISABLE_CURL / / #undef U_DISABLE_GNUTLS / / #undef U_DISABLE_WEBSOCKET / / #undef U_DISABLE_YDER / / #undef U_WITH_FREERTOS / / #undef U_WITH_LWIP /

endif / _ULFIUS_CFGH /

make clean make [ 10%] Building C object CMakeFiles/ulfius.dir/src/u_map.c.o [ 20%] Building C object CMakeFiles/ulfius.dir/src/u_request.c.o [ 30%] Building C object CMakeFiles/ulfius.dir/src/u_response.c.o [ 40%] Building C object CMakeFiles/ulfius.dir/src/u_send_request.c.o [ 50%] Building C object CMakeFiles/ulfius.dir/src/u_websocket.c.o [ 60%] Building C object CMakeFiles/ulfius.dir/src/yuarel.c.o [ 70%] Building C object CMakeFiles/ulfius.dir/src/ulfius.c.o [ 80%] Linking C shared library libulfius.so [ 80%] Built target ulfius [ 90%] Building C object CMakeFiles/uwsc.dir/tools/uwsc/uwsc.c.o [100%] Linking C executable uwsc [100%] Built target uwsc

[babelouest]

$sudo find / -iname 'ulfius-cfg.h'
/usr/local/include/ulfius-cfg.h
/usr/include/ulfius-cfg.h

$sudo find / -iname 'ulfius.h'
/usr/local/include/ulfius.h
/usr/include/ulfius.h

You do have 2 versions of ulfius installed, the one in /usr/include must be an old version

[babelouest]

Does sudo apt remove libulfius remove something?

[alexe100]

I was trying to deploy the service/server on the target computer... In the meanwhile, I reinstalled the operating system and ulfius and now it works! I dont know why because I followed the same steps but now it works.

Thanks a lot