Wirawan Purwanto
Reputation: 4043
Autoconf: detecting if target platform is 32-bit or 64-bit
In GNU Autoconf: is there an easy way (premade macro? or autoconf-archive macro?) to determine the bitness of our target platform is 32-bit or 64-bit? In case you are curious why I asked this: I need to know this since in the good'old Fortran (pre-2003) there is no way to determine if size_t is 4-byte or 8-byte wide.
Upvotes: 2
Views: 1330
Answers (1)
William Pursell
Reputation: 212288
You can use AC_CHECK_SIZEOF to determine the size of a void *. ( I assume the definition of "64 bit" machine is that void * are size 8, although perhaps you care about the size of an int.)
Upvotes: 5
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