On Wed, 12 Apr 2006, Nick Craig-Wood wrote:
> In linux.kernel, you wrote:
>> Man tcsetattr in gentoo implicitly states that after
>> #include <termios.h>
>> #include <unistd.h>
>>
>> CRTSCTS constant will be defined. This is however false:
>> tty.c:38: error: `CRTSCTS' undeclared (first use in this function)
>>
>> CRTSCTS is defined in bits/termios.h and in asm/termbits.h The question
>> is what is the correct state of affairs?
>> 1) the manpage should say bits/termios.h instead of termios.h
>> 2) the manpage should say asm/termbits.h instead of termios.h
>> 3) the termios.h should include bits/termios.h or asm/termbits.h
>> 4) the manpage should not mention CRTSCTS at all
> 5) there is a bug in your installation
>
> Works for me in Debian testing
>
> cat <<'EOF' > z.c
> #include <termios.h>
> #include <unistd.h>
> #include <stdio.h>
>
> int main(void)
> {
> printf("0x%08X", CRTSCTS);
> return 0;
> }
> EOF
> gcc -Wall z.c -o z
> ./z
>
> Gives
>
> 0x80000000
>
> --
> Nick Craig-Wood <[email protected]> -- http://www.craig-wood.com/nick
> -
No headers in the /usr/include/bits directory should never be
referenced in user code. /usr/include/termios.h picks up whatever
it needs but it is referenced to the user's environment so the
user could certainly screw it up!
Snipped header:
#ifndef _TERMIOS_H
#define _TERMIOS_H 1
#include <features.h>
#ifdef __USE_UNIX98
/* We need `pid_t'. */
# include <bits/types.h>
# ifndef __pid_t_defined
typedef __pid_t pid_t;
# define __pid_t_defined
# endif
#endif
__BEGIN_DECLS
#include <bits/termios.h> <----------- Included here
__END_DECLS
#endif /* termios.h */
If the user had redefined the C_INCLUDE_PATH to junk, this might
quietly fail, depending upon the gcc version.
Cheers,
Dick Johnson
Penguin : Linux version 2.6.15.4 on an i686 machine (5589.42 BogoMips).
Warning : 98.36% of all statistics are fiction, book release in April.
_
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