SDL linking cannot find definition of Unlock Surface

platform · Post by **platform** » Fri Aug 28, 2009 1:41 am

Hi all,

As you can see from the linker error below the definition of SDL_UnLockSurface is not available to me. This is made all the stranger by the fact that SDL_LockSurface is!

Could someone pass their eyes over the command below and verify if I've got all the necessary linker flags present?

It would be much appreciated.

psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -I/usr/local/pspdev/psp/include/SDL -Dmain=SDL_main -D PSP_BUILD -D_PSP_FW_VERSION=150 -L. -L/usr/local/pspdev/psp/sdk/lib main.o entities/playerentity.o entities/platform.o collision/collision.o entities/entity.o animation/animationManager.o animation/spriteutils.o system/input.o system/screen.o ingameUI/viewport.o -lSDL_image -L/usr/local/pspdev/psp/lib -lSDLmain -lSDL -lm -L/usr/local/pspdev/psp/sdk/lib -lpspdebug -lpspgu -lpspctrl -lpspge -lpspdisplay -lpsphprm -lpspsdk -lpsprtc -lpspaudio -lc -lpspuser -lpsputility -lpspkernel -lpspdebug -lpspdisplay -lpspge -lpspctrl -lpspsdk -lc -lpspnet -lpspnet_inet -lpspnet_apctl -lpspnet_resolver -lpsputility -lpspuser -lpspkernel -o build/psp/simplePlatform.elf
animation/spriteutils.o: In function `SPR_YaxisReflectAndBlitSpriteTo':
spriteutils.c:(.text+0x580): undefined reference to `SDL_UnLockSurface'

jsharrad · Post by **jsharrad** » Fri Aug 28, 2009 1:54 am

It's case sensitive ... SDL_UnlockSurface

platform · Post by **platform** » Fri Aug 28, 2009 2:27 am

jsharrad wrote:It's case sensitive ... SDL_UnlockSurface

It is indeed, good catch.

Now, this is somewhat academic, but does anyone know why that builds fine for my OSX build but not for PSP?

svxs · Post by **svxs** » Fri Aug 28, 2009 4:42 am

Is it a similar error message?

jojojoris · Post by **jojojoris** » Fri Aug 28, 2009 7:50 am

svxs wrote:Is it a similar error message?

...on my OSX is builds fine...

So there is no second error.

svxs · Post by **svxs** » Fri Aug 28, 2009 7:03 pm

I see. I mistook the way he worded it to mean that his project compiled properly for OSX when using libraries and tools that are unrelated to the PSP, yet generated an unrelated compiling or linking error when being built for the PSP.

An odd issue if the OSX build is still erroneously letting the binary get linked to the improperly spelled function. No clue. Does it crash?

platform · Post by **platform** » Wed Sep 02, 2009 2:05 am

svxs wrote:An odd issue if the OSX build is still erroneously letting the binary get linked to the improperly spelled function. No clue. Does it crash?

That's correct, OSX was compiling and running the improperly spelt function using an unrelated SDL implementation. My guess is that there is a typedef hidden in the OSX headers somewhere.

Any way, not the most important issue. I just wondered if anyone had encountred this.

svxs · Post by **svxs** » Wed Sep 02, 2009 4:37 pm

Figured the idea of SDL was to enhance portability. Curious for there to be things to encourage unportable code in that implementation...