[CMake] Find SDL

[Christer Solskogen]

Benjamin Eikel <cmake at ...> writes:
> 
> Hello Christer,
> 
> Zitat von Christer Solskogen <christer.solskogen at ...>:
> 
> > Hi!
> >
> > I have a cross compiler, installed into /opt/cross, which is  
> > compiled by me. This cross compiler (gcc) is sysroot aware, which  
> > means that every header and library is installed into  
> > /opt/cross/≤target>.
> >
> > In order to get cmake to find SDL (both SDL1 and SDL2) I need to  
> > specify SDLDIR. The project I'm using (called hatari, a Atari ST(e)  
> > emulator) is also using other libraries like readline and png, which  
> > cmake have no problem finding.
> >
> > Is this a bug in cmake? Right now the cmake version I'm using is  
> > 2.8.12.2, but this problem have been there since I can remember.
> 
> in order to help you, I need more information. If I understand you  
> correctly, you do not want to set the environment variable SDLDIR.  
> Instead, you expect the FindSDL module to find SDL without that  
> information. Is that correct?

Yes, that is correct.

> Please give some more information about your installation. In which  
> path exactly is SDL located (where is "SDL.h", where is "libSDL.a" or  
> "libSDL.so")?
> 

They are cross compiled for Windows (mingw-w64) which means that they have 
different names (libSDL.dll.a for instance) but they are installed in 
/opt/cross-mingw-w64/x86_64-w64-mingw32/{include,lib}.

x86_64-w64-mingw32-gcc is using /home/solskogen/obj/cross-mingw-w64 as 
sysroot. 
cmake have no trouble finding png or zlib. 
-- Found ZLIB: /opt/cross-mingw-w64/x86_64-w64-mingw32/lib/libz.a (found 
version "1.2.8") 
-- Found PNG: /opt/cross-mingw-w64/x86_64-w64-mingw32/lib/libpng.a (found 
version "1.6.12")

-- 
chs