GCC compilation yields “real.h:53: error: 'SIZEOF_LONG' undeclared here (not in a function)”

Question

I\'m trying to compile GCC 4.7.2 on a Buffalo LinkStation Pro Duo (after unlocking it) which runs Linux 2.6.31.8 armv5tel.

Unfortunately, make throws qu

Answer 1

SIZEOF_LONG should be #defined by configure in the file auto-host.h. Your auto-host.h should contain something like:

/* The size of `long', as computed by sizeof. */
#ifndef USED_FOR_TARGET
#define SIZEOF_LONG 8
#endif

If the above is not present (and it looks like in your case it's indeed so), check config.log for errors. Search for errors around the string checking size of long.