U++ forum: Welcome to the forum

Search on this site

Search in forums

Home » Community » Newbie corner » linking has failed

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

linking has failed [message #49626]

Sun, 18 March 2018 11:39

idkfa46
Messages: 155
Registered: December 2011

Experienced Member

Hi guys, linking has failed! Confused

What does it mean? Can you support me please?

Regards,
Matteo

 (): Linking has failed
 (): C:/upp/bin/mingw64/32/bin/../lib/gcc/i686-w64-mingw32/7.1.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lmysql
 (): collect2.exe: error: ld returned 1 exit status

Report message to a moderator

Re: linking has failed [message #49627 is a reply to message #49626]

Sun, 18 March 2018 12:05

Klugier
Messages: 1099
Registered: September 2012
Location: Poland, Kraków

Senior Contributor

Hello,

Some time ago I see similar problem in the past - https://www.ultimatepp.org/forums/index.php?t=msg&goto=4 9329&&srch=mysql#msg_49329.

In brief, you need to add path to mysql library (.dll or .so files) in your build method. More information how to do in properly, you will find in above forum thread.

Sincerely,
Klugier

U++ - one framework to rule them all.

Report message to a moderator

Re: linking has failed [message #49628 is a reply to message #49627]

Sun, 18 March 2018 12:33

idkfa46
Messages: 155
Registered: December 2011

Experienced Member

Hallo Klugier,
thank you for your reply.

I already made it but seems to be not enough!

Here attached my current setting...

Where am I wrong?

Regards,
Matteo

Attachment: Cattura1.PNG
(Size: 176.36KB, Downloaded 291 times)

Report message to a moderator

Re: linking has failed [message #49629 is a reply to message #49628]

Sun, 18 March 2018 13:52

Klugier
Messages: 1099
Registered: September 2012
Location: Poland, Kraków

Senior Contributor

Hello,

Probably you shouldn't use ".../MySQL Server 5.5/lib/debug" (Build method - LIB directories) in release mode. Please find the way how to change that value for the release build. Optimally when your setup is correct, you should build debug and release mode.

Can you link your application in debug mode?

Sincerely,
Klugier

U++ - one framework to rule them all.

[Updated on: Sun, 18 March 2018 13:52]

Report message to a moderator

Re: linking has failed [message #49630 is a reply to message #49629]

Sun, 18 March 2018 15:52

idkfa46
Messages: 155
Registered: December 2011

Experienced Member

No, I already tryed!

I receive the same error message in debug mode too Confused

Matteo

 (): Linking has failed
 (): C:/upp/bin/mingw64/32/bin/../lib/gcc/i686-w64-mingw32/7.1.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lmysql
 (): collect2.exe: error: ld returned 1 exit status

Report message to a moderator

Re: linking has failed [message #49631 is a reply to message #49630]

Mon, 19 March 2018 11:57

BioBytes
Messages: 308
Registered: October 2008
Location: France

Senior Member

Hi Matteo,

Did you settle the "Main Package Organization" to GUI.MYSQLDLL. This can be done through the TheIde main menu "Project".

When installing your application, libMySql.dll file must be copied in Windows\System32 directory or in the same directory as the application exe file for dynamic linkage.

Maybe it could help Razz

Cheers

Biobytes

Report message to a moderator

Re: linking has failed [message #49633 is a reply to message #49628]

Mon, 19 March 2018 12:47

Giorgio
Messages: 218
Registered: August 2015

Experienced Member

idkfa46 wrote on Sun, 18 March 2018 12:33

Here attached my current setting...

It seems to me that the path in the lib directory is wrong: just try removing "debug" from the path.

Report message to a moderator

Re: linking has failed [message #49663 is a reply to message #49631]

Sun, 25 March 2018 11:32

idkfa46
Messages: 155
Registered: December 2011

Experienced Member

Hi guys,
thank you for your support but none of the solutions are working at the moment...

BioBytes wrote on Mon, 19 March 2018 11:57

Hi Matteo,
Did you settle the "Main Package Organization" to GUI.MYSQLDLL. This can be done through the TheIde main menu "Project"....

My current setting is GUY SSE2.MYSQLDLL. I tried to complile without SSE2 but the risult is the same....

BioBytes wrote on Mon, 19 March 2018 11:57

...When installing your application, libMySql.dll file must be copied in Windows\System32 directory or in the same directory as the application exe file for dynamic linkage...

I copied the libMySql.dll in the Windows\System32 directory but nothing change...

Giorgio wrote on Mon, 19 March 2018 12:47

It seems to me that the path in the lib directory is wrong: just try removing "debug" from the path.

I updated the path in the lib directory to:
"C:\Program Files\MySQL\MySQL Server 5.5\lib" but nothing change...

I always receive the same error message:

 (): Linking has failed
 (): C:/upp/bin/mingw64/32/bin/../lib/gcc/i686-w64-mingw32/7.1.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lmysql
 (): collect2.exe: error: ld returned 1 exit status

something else to do??? Sad

Regards,
Matteo

Report message to a moderator

Re: linking has failed [message #49665 is a reply to message #49663]

Sun, 25 March 2018 21:52

BioBytes
Messages: 308
Registered: October 2008
Location: France

Senior Member

Hi Matteo,

I realized that you compiled your project using MingW. Did you check that you have a libmysql.a in your ...\MySQLServer5.5\lib folder? MingW cannot use libmysql.lib library only MSC. Rolling Eyes

Regards

Biobytes

Report message to a moderator

Re: linking has failed [message #49674 is a reply to message #49665]

Thu, 29 March 2018 17:12

idkfa46
Messages: 155
Registered: December 2011

Experienced Member

it workssssss!!!!!

Thank you guys... thank you Biobytes, you rock!

My question is... why this libraries are not included in lib folder as default?!

Regards,
Matteo

[Updated on: Thu, 29 March 2018 17:17]

Report message to a moderator

Re: linking has failed [message #49679 is a reply to message #49674]

Sat, 31 March 2018 22:07

BioBytes
Messages: 308
Registered: October 2008
Location: France

Senior Member

Hi Matteo,

Quote:

My question is... why this libraries are not included in lib folder as default

See below
http://gluescript.sourceforge.net/?q=node/39

Would you post your libmysql.a ? I could be interested in comparing to my own installation. Nod