No cfmakeraw on Illumos.  Set bits manually as per https://www.perkin.org.uk/posts/solaris-portability-cfmakeraw.html

--- freerdp-3.22.0/libfreerdp/utils/passphrase.c.old
+++ freerdp-3.22.0/libfreerdp/utils/passphrase.c
@@ -316,7 +316,15 @@
 		}
 
 		struct termios now = termios;
+		#ifdef __sun
+			now.c_iflag &= ~(IMAXBEL|IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
+			now.c_oflag &= ~OPOST;
+			now.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
+			now.c_cflag &= ~(CSIZE|PARENB);
+			now.c_cflag |= CS8;
+#else
 		cfmakeraw(&now);
+#endif
 		const int rc3 = tcsetattr(fd, TCSANOW, &now);
 		if (rc3 != 0)
 		{