Re: [Open2x-devel] Looking to compile libSDL_Config + inifile

[StarG <St...@op...>]

It was a plain build order problem. The problem gets solved by 
reordering the linker inputs. I wasn't aware that object code (here: 
main.o) adheres the very same rules when trying to link with libraries.

Thanks goto Lithosphere who started to dig in the right hole and brought 
me on the right path.

# compile statically
$ /opt/open2x/gcc-4.1.1-glibc-2.3.6/bin/arm-open2x-linux-g++ 
`/opt/open2x/gcc-4.1.1-glibc-2.3.6/bin/sdl-config --cflags` -I./src 
-I/opt/open2x/gcc-4.1.1-glibc-2.3.6/include ./tests/001/main.o 
-lSDL_Config -lSDL -lpthread -static  -L. -o test1.gpu

(note the main.o appearing before the -lSDL_Config)

StarG


StarG schrieb:
> I tried to get those libs compiling and it seems it works for the first 
> one. When i'm trying to link this created library it fails with 
> "unresolved symbol" linker errors.
 >
 > (...)
 >
> This works fine and creates the library. Now i try to build a supplied 
> test program.
> 
> # compile statically
> /opt/open2x/gcc-4.1.1-glibc-2.3.6/bin/arm-open2x-linux-g++ 
> `/opt/open2x/gcc-4.1.1-glibc-2.3.6/bin/sdl-config --cflags` -I./src 
> -I/opt/open2x/gcc-4.1.1-glibc-2.3.6/include -lSDL_Config -lSDL -static 
> -L. ./tests/001/main.o -o test1.gpu
> 
> this dumps a lot of errors:
> 
> ./tests/001/main.o: In function `main':
> main.cpp:(.text+0x84): undefined reference to `CFG_OpenFile'
> main.cpp:(.text+0x9c): undefined reference to `SDL_GetError'
> main.cpp:(.text+0xd0): undefined reference to `SDL_GetError'
> main.cpp:(.text+0x134): undefined reference to `CFG_ReadInt'
> main.cpp:(.text+0x154): undefined reference to `CFG_SelectGroup'
> [...]
> 
> while the SDL_GetError seems somewhat external and not a real problem 
> here the CFG_* functions are in the library. At least it looks like they 
> do. I'm somewhat helpless in this matter as there is little information 
> in the error what went wrong. I'm looking for ideas how to solve such 
> errors for now and in the future - maybe using a clever way using nm.
> 
> For a deeper look inside here is the my work archive for that library:
> 
> http://nocool.dyndns.org/open2x/SDL_Config.tgz
> 
> The supplied makefile should build the library with "make all" and 
> should try to make the testfiles with "make tests".
> 
> Thanks in advance
> StarG
> 
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