MySQL and C++

I've been trying to follow the tutorial on the MySQL Connector C++ documentation. However, I constantly get a linker error:

1>driver.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class sql::mysql::MySQL_Driver * __cdecl sql::mysql::get_mysql_driver_instance(void)" (__imp_?get_mysql_driver_instance@mysql@sql@@YAPAVMySQL_Driver@12@XZ) referenced in function _main
1>TestProject2.exe : fatal error LNK1120: 1 unresolved externals

I'm fairly new to C++ and basically everything I find says "Figure it out.", which makes it about as fun as smashing my face into a brick wall. Thanks guys.

Well, that's easy! You should be able to figure it out!

Does that annoyyou?

It means just what it means.
unresolved external symbol
Are you passing that mysql lib to the linker? Is the version the one that it's epxecting?

I think you should try to resolve externals.

If you can't even read error messages you shouldn't be using Sepples, because you'll be getting a lot of them.

>>1
You have not one, not two, but THREE problems:
1. You are using MySQL
2. You are using C++
3. You are using Visual C++, which does not support C99

"Unresolved external" is debugger speak for "user doesn't know what he's doing."

>>7
Or someone who knows what he's doing, but forgot to set up the libraries used by his linker.

>>8
Yeah this. You're not linking against the connector lib.

>>6
As much as I hate VS's lack of C99 support, this isn't the problem here. The connector he's using is sepples.

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I've always disliked the phrase "unresolved externals."  Can't they name it something else?

>>11
It makes perfect sense. You named a symbol, and that symbol is expected to be external. The compiler put in the references, but when it was time for the linker to build the executable, it couldn't find from where to import that symbol, thus some externals are missing, either due to the library being missing, or the library being of a wrong version, and thus the export is missing and couldn't be resolved, thus "unresolved externals".

>>11
"Man, we ain't found shit."

>>13
I approve of this compiler error.

>>14
gcc -nigger

>>15
^* gcc -African American

>>16
* gcc --African-American

don't you know anything about long arguments?

>>17
ImageMagick

>>17
/prog/ has them all the time over the most pointless of shit.

>>19
./fuckme --I-feel-one-coming-on-now

Bump to get the backwards shit off the front page

>>21
This thread is so depressing though:

"Help, I am getting a linker error?"

This problem almost always has the same answer. For once I'd like to see an interesting linker problem.

>>22
Here's my favorite linker problem:

ld: scattered reloc r_address too large for inferred architecture ppc
I think it happens because the program being linked is just too damn big.  It happens when you compile GHC 6.12 or newer on OS X / PowerPC.  The toolchain won't get fixed because Apple hasn't shipped a PowerPC in half a decade.

>>23

Changed 13 months ago by thorkilnaur

The problem appeared between the PPC Mac OS X builds  http://darcs.haskell.org/buildbot/all/builders/tnaur%20PPC%20OSX%20head%202/builds/223 and  http://darcs.haskell.org/buildbot/all/builders/tnaur%20PPC%20OSX%20head%202/builds/224. Searching the patches applied between those two builds, I have found that the problem appears precisely when the patch

Fri Apr  3 10:46:34 CEST 2009  simonpj@microsoft.com
  * Adjust inlining heursitics

is applied. I have also tried to unpull this patch from the HEAD repository of the tnaur PPC OSX head 2 builder and then the build succeeds. (The tnaur PPC OSX head 2 builder has suffered from other errors lately, the latest build that reports the error reported in the present ticket is  http://darcs.haskell.org/buildbot/all/builders/tnaur%20PPC%20OSX%20head%202/builds/252/steps/compile/logs/stdio.)

Best regards Thorkil

>>22
How about the one where runtime linker paths are affected by compile-time linker options?