how to enable __far in gcc cygwin

Question

I am having some trouble compiling my code having __far.

I have read that __far is not a c standard keyword.

furthermore, this is in relation to the use of rl78 compiler.

score 1 · Answer 1 · edited May 23 '17 at 11:52

1

C Implementations for architectures with non-flat address spaces, usually had those two pointer "classes":

near pointers that store the offset within a memory segment
far pointers that additionally specify what segment

Many compilers implemented the latter using a non-standard __far specifier. The 16-bit x86 used to be such an architecture.

But Cygwin is only available for 32 bit x86 and x86_64 versions of Windows. And on those there is no concept of near and far pointer anymore.

In order to compile your code, you will need to strip away the __fars and hope that the code itself isn't too tightly coupled to your original architecture.

edited May 23 '17 at 11:52

Community

1
1

answered Jun 14 '16 at 06:54

a3f

8,517
1
41
46

thank you, how do you suggest that __far to be removed? what alternatives do you suggest rather than __far to be used? – kimondoe Jun 14 '16 at 06:58
1

Just remove it. e.g. by compiling with `-D__far=""`. – a3f Jun 14 '16 at 07:00

how to enable __far in gcc cygwin

1 Answers1