Date: Sun, 4 Feb 2001 15:36:49 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Dietmar Segbert <Dietmar DOT Segbert AT T-ONLINE DOT de>
cc: djgpp AT delorie DOT com
Subject: Re: syntax for hex and binary
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On 4 Feb 2001, Dietmar Segbert wrote:

> And GCC makes a error like undeclared _B115200 ...
> 
> A integer 16 will be written in hex as 0x10, but who is the syntax for  
> binary?

There's no syntax to write a binary integer constant in C.

In this case, B115200 is not a binary constant, however (binary constants 
can only have digits 0 or 1).  I'm guessing that B115200 is a macro for 
setting the UART to work at 115200 baudrate.  It should be defined by 
some header included by the source file you are trying to compile.