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20c428fd JB |
1 | /* Template for system description header files. |
2 | This file describes the parameters that system description files | |
3 | should define or not. | |
7490175b | 4 | |
acaf905b | 5 | Copyright (C) 1985-1986, 1992, 1999, 2001-2012 Free Software Foundation, Inc. |
20c428fd JB |
6 | |
7 | This file is part of GNU Emacs. | |
8 | ||
4b158629 | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
20c428fd | 10 | it under the terms of the GNU General Public License as published by |
4b158629 GM |
11 | the Free Software Foundation, either version 3 of the License, or |
12 | (at your option) any later version. | |
20c428fd JB |
13 | |
14 | GNU Emacs is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
4b158629 | 20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
20c428fd JB |
21 | |
22 | ||
e05aebe9 GM |
23 | /* Define symbols to identify the version of Unix this is. |
24 | Define all the symbols that apply correctly. */ | |
20c428fd | 25 | |
20c428fd JB |
26 | /* #define USG5 */ |
27 | /* #define USG */ | |
28 | /* #define HPUX */ | |
20c428fd JB |
29 | /* #define BSD4_2 */ |
30 | /* #define BSD4_3 */ | |
8e4c450d | 31 | /* #define BSD_SYSTEM */ |
20c428fd | 32 | |
20c428fd JB |
33 | /* Emacs can read input using SIGIO and buffering characters itself, |
34 | or using CBREAK mode and making C-g cause SIGINT. | |
35 | The choice is controlled by the variable interrupt_input. | |
32de6484 | 36 | |
20c428fd JB |
37 | Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO) |
38 | ||
bb7b4368 PE |
39 | Emacs uses the presence or absence of the SIGIO and BROKEN_SIGIO macros |
40 | to indicate whether or not signal-driven I/O is possible. It uses | |
32de6484 JB |
41 | INTERRUPT_INPUT to decide whether to use it by default. |
42 | ||
20c428fd | 43 | SIGIO can be used only on systems that implement it (4.2 and 4.3). |
eb8c3be9 | 44 | CBREAK mode has two disadvantages |
20c428fd JB |
45 | 1) At least in 4.2, it is impossible to handle the Meta key properly. |
46 | I hear that in system V this problem does not exist. | |
47 | 2) Control-G causes output to be discarded. | |
48 | I do not know whether this can be fixed in system V. | |
49 | ||
50 | Another method of doing input is planned but not implemented. | |
51 | It would have Emacs fork off a separate process | |
52 | to read the input and send it to the true Emacs process | |
e05aebe9 | 53 | through a pipe. */ |
20c428fd JB |
54 | #define INTERRUPT_INPUT |
55 | ||
56 | /* Letter to use in finding device name of first pty, | |
e05aebe9 | 57 | if system supports pty's. 'a' means it is /dev/ptya0. */ |
20c428fd JB |
58 | #define FIRST_PTY_LETTER 'a' |
59 | ||
e05aebe9 | 60 | /* Define HAVE_PTYS if the system supports pty devices. */ |
20c428fd JB |
61 | #define HAVE_PTYS |
62 | ||
77ccee09 | 63 | /* subprocesses should be undefined if you do NOT want to |
20c428fd JB |
64 | have code for asynchronous subprocesses |
65 | (as used in M-x compile and M-x shell). | |
e05aebe9 | 66 | Currently only MSDOS does not support this. */ |
20c428fd | 67 | |
77ccee09 | 68 | /* #undef subprocesses */ |
20c428fd | 69 | |
20c428fd JB |
70 | /* Define CLASH_DETECTION if you want lock files to be written |
71 | so that Emacs can tell instantly when you try to modify | |
72 | a file that someone else has modified in his Emacs. */ | |
20c428fd JB |
73 | #define CLASH_DETECTION |
74 | ||
d4198db9 JB |
75 | /* If the character used to separate elements of the executable path |
76 | is not ':', #define this to be the appropriate character constant. */ | |
77 | /* #define SEPCHAR ':' */ | |
78 | ||
f5070950 JB |
79 | /* ============================================================ */ |
80 | ||
e05aebe9 GM |
81 | /* Here, add any special hacks needed to make Emacs work on this |
82 | system. For example, you might define certain system call names | |
83 | that don't exist on your system, or that do different things on | |
84 | your system and must be used only through an encapsulation (which | |
85 | you should place, by convention, in sysdep.c). */ | |
f5070950 | 86 | |
2327e4a0 GM |
87 | /* If the system's imake configuration file defines `NeedWidePrototypes' |
88 | as `NO', we must define NARROWPROTO manually. Such a define is | |
177c0ea7 | 89 | generated in the Makefile generated by `xmkmf'. If we don't |
2327e4a0 GM |
90 | define NARROWPROTO, we will see the wrong function prototypes |
91 | for X functions taking float or double parameters. */ | |
92 | ||
93 | /* #define NARROWPROTO 1 */ | |
94 | ||
f5070950 | 95 | /* ============================================================ */ |
00b1a5fb JB |
96 | |
97 | /* After adding support for a new system, modify the large case | |
7b570c76 | 98 | statement in configure.in to recognize reasonable |
00b1a5fb JB |
99 | configuration names, and add a description of the system to |
100 | `etc/MACHINES'. | |
101 | ||
7b570c76 GM |
102 | Check for any tests of $opsys in configure.in, and add an entry |
103 | for the new system if needed. | |
104 | ||
00b1a5fb JB |
105 | If you've just fixed a problem in an existing configuration file, |
106 | you should also check `etc/MACHINES' to make sure its descriptions | |
107 | of known problems in that configuration should be updated. */ | |
ab5796a9 | 108 |