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c8add24e86
* configure.ac (GNU_LIBRARY_PENDING_OUTPUT_COUNT): Move here from src/s. * src/s/gnu.h, src/s/gnu-linux.h: Move GNU_LIBRARY_PENDING_OUTPUT_COUNT to configure.
141 lines
4.8 KiB
C
141 lines
4.8 KiB
C
/* This file is the configuration file for Linux-based GNU systems
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Copyright (C) 1985-1986, 1992, 1994, 1996, 1999, 2001-2012
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Free Software Foundation, Inc.
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This file was put together by Michael K. Johnson and Rik Faith.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
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/* Define symbols to identify the version of Unix this is.
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Define all the symbols that apply correctly. */
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#define USG
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#define GNU_LINUX
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#ifdef emacs
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#ifdef HAVE_LINUX_VERSION_H
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#include <linux/version.h>
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#if LINUX_VERSION_CODE >= 0x20400
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/* 21 Jun 06: Eric Hanchrow <offby1@blarg.net> says this works. */
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#define SIGNALS_VIA_CHARACTERS
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#endif /* LINUX_VERSION_CODE >= 0x20400 */
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#endif /* HAVE_LINUX_VERSION_H */
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#endif /* emacs */
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#if defined HAVE_GRANTPT
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#define UNIX98_PTYS
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/* Run only once. We need a `for'-loop because the code uses `continue'. */
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#define PTY_ITERATION int i; for (i = 0; i < 1; i++)
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#ifdef HAVE_GETPT
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#define PTY_NAME_SPRINTF
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#define PTY_OPEN fd = getpt ()
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#else /* not HAVE_GETPT */
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#define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
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#endif /* not HAVE_GETPT */
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/* Note that grantpt and unlockpt may fork. We must block SIGCHLD to
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prevent sigchld_handler from intercepting the child's death. */
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#define PTY_TTY_NAME_SPRINTF \
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{ \
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char *ptyname; \
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\
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sigblock (sigmask (SIGCHLD)); \
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if (grantpt (fd) == -1 || unlockpt (fd) == -1 \
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|| !(ptyname = ptsname(fd))) \
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{ \
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sigunblock (sigmask (SIGCHLD)); \
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close (fd); \
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return -1; \
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} \
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snprintf (pty_name, sizeof pty_name, "%s", ptyname); \
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sigunblock (sigmask (SIGCHLD)); \
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}
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#else /* not HAVE_GRANTPT */
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/* Letter to use in finding device name of first pty,
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if system supports pty's. 'p' means it is /dev/ptyp0 */
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#define FIRST_PTY_LETTER 'p'
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#endif /* not HAVE_GRANTPT */
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/* Define HAVE_PTYS if the system supports pty devices. */
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#define HAVE_PTYS
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#define HAVE_SOCKETS
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/* Define CLASH_DETECTION if you want lock files to be written
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so that Emacs can tell instantly when you try to modify
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a file that someone else has modified in his Emacs. */
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#define CLASH_DETECTION
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/* Here, on a separate page, add any special hacks needed
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to make Emacs work on this system. For example,
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you might define certain system call names that don't
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exist on your system, or that do different things on
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your system and must be used only through an encapsulation
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(Which you should place, by convention, in sysdep.c). */
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#ifdef emacs
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#define INTERRUPT_INPUT
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#endif
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#define POSIX /* affects getpagesize.h and systty.h */
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/* This is to work around mysterious gcc failures in some system versions.
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It is unlikely that Emacs changes will work around this problem;
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therefore, this should remain permanently. */
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#ifndef HAVE_XRMSETDATABASE
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#define HAVE_XRMSETDATABASE
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#endif
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#define NARROWPROTO 1
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/* Tell that garbage collector that setjmp is known to save all
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registers relevant for conservative garbage collection in the jmp_buf. */
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/* Not all the architectures are tested, but there are Debian packages
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for SCM and/or Guile on them, so the technique must work. See also
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comments in alloc.c concerning setjmp and gcc. Fixme: it's
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probably safe to make this conditional just on GCC, except for ia64
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register window-flushing. */
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/* Don't use #cpu here since in newest development versions of GCC,
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we must call cpp with -traditional, and that disables #cpu. */
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#if defined __i386__ || defined __sparc__ || defined __mc68000__ \
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|| defined __alpha__ || defined __mips__ || defined __s390__ \
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|| defined __arm__ || defined __powerpc__ || defined __amd64__ \
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|| defined __ia64__ || defined __sh__
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#define GC_SETJMP_WORKS 1
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#ifdef __ia64__
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#define GC_MARK_SECONDARY_STACK() \
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do { \
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extern void *__libc_ia64_register_backing_store_base; \
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__builtin_ia64_flushrs (); \
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mark_memory (__libc_ia64_register_backing_store_base, \
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__builtin_ia64_bsp ()); \
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} while (0)
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#endif
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#else
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#define GC_MARK_STACK GC_USE_GCPROS_AS_BEFORE
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#endif
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#ifdef __i386__
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/* libc-linux/sysdeps/linux/i386/ulimit.c says that due to shared library, */
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/* we cannot get the maximum address for brk */
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# define ULIMIT_BREAK_VALUE (32*1024*1024)
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#endif
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