forked from Github/emacs
47d7532e09
* admin/CPP-DEFINES (BSD_SYSTEM, HAVE_FSYNC): Remove.
* admin/merge-gnulib (GNULIB_MODULES): Add fsync, fdatasync.
* configure.ac (BSD_SYSTEM, BSD_SYSTEM_AHB): Remove; no longer needed.
(fsync): Remove check; now done by gnulib.
* lib/fdatasync.c, lib/fsync.c, m4/fdatasync.m4, m4/fsync.m4:
New files, from gnulib.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* lib-src/Makefile.in (LIB_FDATASYNC): New macro.
(emacsclient${EXEEXT}): Use it.
* lib-src/emacsclient.c (main): Use fdatasync, not fsync, since we don't
care about metadata. Keep trying if interrupted.
* lib-src/movemail.c (main, popmail): Don't worry about BSD_SYSTEM, since
fsync is available everywhere (or there is a substitute). Don't
report an error if fsync returns EINVAL.
* nt/inc/ms-w32.h (fdatasync): New macro, suggested by Eli Zaretskii.
* src/Makefile.in (LIB_FDATASYNC): New macro.
(LIBES): Use it.
* src/conf_post.h (BSD_SYSTEM, BSD_SYSTEM_AHB): Remove; no longer needed.
* src/fileio.c (Fwrite_region, write_region_inhibit_fsync):
Don't worry about HAVE_FSYNC, since a substitute fsync is
available if the system lacks one.
(Fwrite_regin): Retry fsync if interrupted.
Fixes: debbugs:13944
227 lines
7.2 KiB
C
227 lines
7.2 KiB
C
/* conf_post.h --- configure.ac includes this via AH_BOTTOM
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Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2013 Free Software
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Foundation, Inc.
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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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/* Commentary:
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Rather than writing this code directly in AH_BOTTOM, we include it
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via this file. This is so that it does not get processed by
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autoheader. Eg, any undefs here would otherwise be commented out.
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*/
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/* Code: */
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/* Include any platform specific configuration file. */
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#ifdef config_opsysfile
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# include config_opsysfile
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#endif
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#ifndef WINDOWSNT
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/* On AIX 3 this must be included before any other include file. */
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#include <alloca.h>
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#if ! HAVE_ALLOCA
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# error "alloca not available on this machine"
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#endif
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#endif
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#ifndef __has_attribute
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# define __has_attribute(a) 0 /* non-clang */
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#endif
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#ifdef DARWIN_OS
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#ifdef emacs
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#define malloc unexec_malloc
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#define realloc unexec_realloc
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#define free unexec_free
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/* Don't use posix_memalign because it is not compatible with unexmacosx.c. */
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#undef HAVE_POSIX_MEMALIGN
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#endif
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/* The following solves the problem that Emacs hangs when evaluating
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(make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
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does not exist. Also, setsid is not allowed in the vfork child's
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context as of Darwin 9/Mac OS X 10.5. */
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#undef HAVE_WORKING_VFORK
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#define vfork fork
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#endif /* DARWIN_OS */
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/* We have to go this route, rather than the old hpux9 approach of
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renaming the functions via macros. The system's stdlib.h has fully
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prototyped declarations, which yields a conflicting definition of
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srand48; it tries to redeclare what was once srandom to be srand48.
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So we go with HAVE_LRAND48 being defined. */
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#ifdef HPUX
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#undef srandom
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#undef random
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/* We try to avoid checking for random and rint on hpux in
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configure.ac, but some other configure test might check for them as
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a dependency, so to be safe we also undefine them here.
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*/
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#undef HAVE_RANDOM
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#undef HAVE_RINT
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#endif /* HPUX */
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#ifdef IRIX6_5
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#ifdef emacs
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char *_getpty();
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#endif
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#endif /* IRIX6_5 */
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#ifdef MSDOS
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#ifndef __DJGPP__
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You lose; /* Emacs for DOS must be compiled with DJGPP */
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#endif
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#define _NAIVE_DOS_REGS
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/* Start of gnulib-related stuff */
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/* lib/ftoastr.c wants strtold, but DJGPP only has _strtold. DJGPP >
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2.03 has it, but it also has _strtold as a stub that jumps to
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strtold, so use _strtold in all versions. */
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#define strtold _strtold
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#if __DJGPP__ > 2 || __DJGPP_MINOR__ > 3
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# define HAVE_LSTAT 1
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#else
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# define lstat stat
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#endif
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/* The "portable" definition of _GL_INLINE on config.h does not work
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with DJGPP GCC 3.4.4: it causes unresolved externals in sysdep.c,
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although lib/execinfo.h is included and the inline functions there
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are visible. */
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#if __GNUC__ < 4
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# define _GL_EXECINFO_INLINE inline
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#endif
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/* End of gnulib-related stuff. */
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#define emacs_raise(sig) msdos_fatal_signal (sig)
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/* Define one of these for easier conditionals. */
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#ifdef HAVE_X_WINDOWS
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/* We need a little extra space, see ../../lisp/loadup.el and the
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commentary below, in the non-X branch. The 140KB number was
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measured on GNU/Linux and on MS-Windows. */
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#define SYSTEM_PURESIZE_EXTRA (-170000+140000)
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#else
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/* We need a little extra space, see ../../lisp/loadup.el.
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As of 20091024, DOS-specific files use up 62KB of pure space. But
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overall, we end up wasting 130KB of pure space, because
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BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
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non-DOS specific files and load history; the latter is about 55K,
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but depends on the depth of the top-level Emacs directory in the
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directory tree). Given the unknown policy of different DPMI
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hosts regarding loading of untouched pages, I'm not going to risk
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enlarging Emacs footprint by another 100+ KBytes. */
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#define SYSTEM_PURESIZE_EXTRA (-170000+65000)
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#endif
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#endif /* MSDOS */
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/* Mac OS X / GNUstep need a bit more pure memory. Of the existing knobs,
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SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems. */
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#ifdef HAVE_NS
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#if defined NS_IMPL_GNUSTEP
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# define SYSTEM_PURESIZE_EXTRA 30000
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#elif defined DARWIN_OS
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# define SYSTEM_PURESIZE_EXTRA 200000
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#endif
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#endif
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#if defined HAVE_NTGUI && !defined DebPrint
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# ifdef EMACSDEBUG
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extern void _DebPrint (const char *fmt, ...);
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# define DebPrint(stuff) _DebPrint stuff
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# else
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# define DebPrint(stuff)
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# endif
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#endif
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#if defined CYGWIN && defined HAVE_NTGUI
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# define NTGUI_UNICODE /* Cygwin runs only on UNICODE-supporting systems */
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# define _WIN32_WINNT 0x500 /* Win2k */
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#endif
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#ifdef emacs /* Don't do this for lib-src. */
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/* Tell regex.c to use a type compatible with Emacs. */
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#define RE_TRANSLATE_TYPE Lisp_Object
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#define RE_TRANSLATE(TBL, C) char_table_translate (TBL, C)
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#ifdef make_number
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/* If make_number is a macro, use it. */
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#define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
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#else
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/* If make_number is a function, avoid it. */
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#define RE_TRANSLATE_P(TBL) (!(INTEGERP (TBL) && XINT (TBL) == 0))
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#endif
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#endif
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#include <string.h>
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#include <stdlib.h>
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#if __GNUC__ >= 3 /* On GCC 3.0 we might get a warning. */
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#define NO_INLINE __attribute__((noinline))
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#else
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#define NO_INLINE
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#endif
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#if (__clang__ \
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? __has_attribute (externally_visible) \
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: (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
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#define EXTERNALLY_VISIBLE __attribute__((externally_visible))
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#else
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#define EXTERNALLY_VISIBLE
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#endif
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
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# define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
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#else
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# define ATTRIBUTE_FORMAT(spec) /* empty */
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#endif
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
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# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
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ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
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#else
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# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
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ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
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#endif
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#define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
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/* Some versions of GNU/Linux define noinline in their headers. */
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#ifdef noinline
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#undef noinline
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#endif
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#define INLINE _GL_INLINE
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#define EXTERN_INLINE _GL_EXTERN_INLINE
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#define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN
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#define INLINE_HEADER_END _GL_INLINE_HEADER_END
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/* Use this to suppress gcc's `...may be used before initialized' warnings. */
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#ifdef lint
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/* Use CODE only if lint checking is in effect. */
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# define IF_LINT(Code) Code
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/* Assume that the expression COND is true. This differs in intent
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from 'assert', as it is a message from the programmer to the compiler. */
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# define lint_assume(cond) ((cond) ? (void) 0 : abort ())
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#else
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# define IF_LINT(Code) /* empty */
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# define lint_assume(cond) ((void) (0 && (cond)))
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#endif
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/* conf_post.h ends here */
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