Cross-compile demos of SDL-1.2.5

SDL Development
1

when cross-compiling testver.c,there are some errors as follows:

testver.tmp:In function ‘main’:
testver.tmp(.text+0xdc):undefined reference to 'SDL_Linked_Version’
testver.tmp(.text+0xf4):undefined reference to 'SDL_Linked_Version’
testver.tmp(.text+0x10c):undefined reference to ‘SDL_Linked_Version’
…
then I copy the same content of SDL_version.h into testver.c,as below:

#define SDL_MAJOR_VERSION 1
#define SDL_MINOR_VERSION 2
#define SDL_PATCHLEVEL 5
#define SDL_VERSION(X)
{
(X)->major = SDL_MAJOR_VERSION;
(X)->minor = SDL_MINOR_VERSION;
(X)->patch = SDL_PATCHLEVEL;
}
#define SDL_VERSIONNUM(X, Y, Z) (X)*1000+(Y)*100+(Z)
#define SDL_COMPILEDVERSION
SDL_VERSIONNUM(SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL)
#define SDL_VERSION_ATLEAST(X, Y, Z)
(SDL_COMPILEDVERSION >= SDL_VERSIONNUM(X, Y, Z))
typedef struct{
Unit8 major;
Unit8 minor;
Unit8 patch;
}SDL_Version;

static SDL_Version version =
{SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATHCLEVEL};

const SDL_version * SDL_Linked_Version(void)
{
return(&version);
}

…

then it can be compile successfully.

I don’t know why…
who can tell me?

Regards,
Andy