I have a basic question that I couldn't find in the info docs or the goat book.
What's the right way to deal with a prototype for a system library function
that differs between platforms? I know how to check for headers and libraries,
but don't know what the autotools way is to get around different prototypes.
For example, on linux the scandir prototype is:
int scandir(const char *dir, struct dirent ***namelist,
int(*select)(const struct dirent *),
int(*compar)(const struct dirent **, const struct dirent **));
and on darwin it's:
int
scandir(const char *dirname, struct dirent ***namelist,
int (*select)(struct dirent *),
int (*compar)(const void *, const void *));
I.e. the const is missing from darwin's 3rd parameter. Not knowing which
systems implement which headers seems problematic. In any case, do I redefine
scandir and know that the linker will still find it or add a const to my own
select() prototype depending on the system? Or is there a standard macro for
this that I couldn't find?
Thanks in advance.
-d
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