197b9f0942
The extra memcmp check after the tcsetattr call is intended to verify
whether all the changes to the termios structure have been applied
correctly.
But for pty's, some of the termios settings make no sense at all, and
therefore the Linux kernel always does:
tty->termios.c_cflag &= ~(CSIZE | PARENB);
tty->termios.c_cflag |= (CS8 | CREAD);
Thus, instead of ignoring such nonsense termios settings, the kernel
changes the termios structure to reflect what pty's actually do. The
consequence is that these settings will not stick, and cause the memcmp
check to fail.
An example where this affects libdivecomputer, are the two backends that
require odd or even parity (e.g. vyper and iconhd). Here, the kernel
will clear the PARENB flag, and thus cause the memcmp check to fail.
Since this check appears to causes more trouble than it solves, let's
just remove it completely!
Overview ======== Libdivecomputer is a cross-platform and open source library for communication with dive computers from various manufacturers. The official web site is: http://www.libdivecomputer.org/ The sourceforge project page is: http://sourceforge.net/projects/libdivecomputer/ Installation ============ On UNIX-like systems (including Linux, Mac OS X, MinGW), use the autotools based build system. Run the following commands from the top directory (containing this file) to configure, build and install the library and utilities: $ ./configure $ make $ make install If you downloaded the libdivecomputer source code directly from the git source code repository, then you need to create the configure script as the first step: $ autoreconf --install To uninstall libdivecomputer again, run: $ make uninstall Support ======= Please send bug reports, feedback or questions to the mailing list: http://libdivecomputer.org/cgi-bin/mailman/listinfo/devel or contact me directly: jef@libdivecomputer.org License ======= Libdivecomputer is free software, released under the terms of the GNU Lesser General Public License (LGPL). You can find a copy of the license in the file COPYING.