+++ /dev/null
-dnl The following are from prerelease autoconf 2.14a. When 2.14 is
-dnl released, we should be able to zap them and just use AC_PREREQ(2.14).
-
-% Copyright (C) 2000, 2001 Free Software Foundation, Inc.
-%
-% This file is part of GNU Emacs.
-%
-% GNU Emacs is free software; you can redistribute it and/or modify
-% it under the terms of the GNU General Public License as published by
-% the Free Software Foundation; either version 2, or (at your option)
-% any later version.
-%
-% GNU Emacs is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with GNU Emacs; see the file COPYING. If not, write to the
-% Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-% Boston, MA 02111-1307, USA.
-
-ifelse(_AC_VERSION_COMPARE(AC_ACVERSION, [2.14]), -1,
-
-# AC_PROG_CC_STDC
-# ---------------
-# If the C compiler in not in ANSI C mode by default, try to add an
-# option to output variable @code{CC} to make it so. This macro tries
-# various options that select ANSI C on some system or another. It
-# considers the compiler to be in ANSI C mode if it handles function
-# prototypes correctly.
-AC_DEFUN(AC_PROG_CC_STDC,
-[AC_REQUIRE([AC_PROG_CC])dnl
-AC_BEFORE([$0], [AC_C_INLINE])dnl
-AC_BEFORE([$0], [AC_C_CONST])dnl
-dnl Force this before AC_PROG_CPP. Some cpp's, eg on HPUX, require
-dnl a magic option to avoid problems with ANSI preprocessor commands
-dnl like #elif.
-dnl FIXME: can't do this because then AC_AIX won't work due to a
-dnl circular dependency.
-dnl AC_BEFORE([$0], [AC_PROG_CPP])
-AC_MSG_CHECKING(for ${CC-cc} option to accept ANSI C)
-AC_CACHE_VAL(ac_cv_prog_cc_stdc,
-[ac_cv_prog_cc_stdc=no
-ac_save_CC="$CC"
-# Don't try gcc -ansi; that turns off useful extensions and
-# breaks some systems' header files.
-# AIX -qlanglvl=ansi
-# Ultrix and OSF/1 -std1
-# HP-UX 10.20 and later -Ae
-# HP-UX older versions -Aa -D_HPUX_SOURCE
-# SVR4 -Xc -D__EXTENSIONS__
-for ac_arg in "" -qlanglvl=ansi -std1 -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
-do
- CC="$ac_save_CC $ac_arg"
- AC_TRY_COMPILE(
-[#include <stdarg.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-/* Most of the following tests are stolen from RCS 5.7's src/conf.sh. */
-struct buf { int x; };
-FILE * (*rcsopen) (struct buf *, struct stat *, int);
-static char *e (p, i)
- char **p;
- int i;
-{
- return p[i];
-}
-static char *f (char * (*g) (char **, int), char **p, ...)
-{
- char *s;
- va_list v;
- va_start (v,p);
- s = g (p, va_arg (v,int));
- va_end (v);
- return s;
-}
-int test (int i, double x);
-struct s1 {int (*f) (int a);};
-struct s2 {int (*f) (double a);};
-int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
-int argc;
-char **argv;],
-[return f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1];],
-[ac_cv_prog_cc_stdc="$ac_arg"; break])
-done
-CC="$ac_save_CC"
-])
-case "x$ac_cv_prog_cc_stdc" in
- x|xno)
- AC_MSG_RESULT([none needed]) ;;
- *)
- AC_MSG_RESULT($ac_cv_prog_cc_stdc)
- CC="$CC $ac_cv_prog_cc_stdc" ;;
-esac
-])# AC_PROG_CC_STDC
-
-# AC_FUNC_MKTIME
-# --------------
-AC_DEFUN(AC_FUNC_MKTIME,
-[AC_REQUIRE([AC_HEADER_TIME])dnl
-AC_CHECK_HEADERS(sys/time.h unistd.h)
-AC_CHECK_FUNCS(alarm)
-AC_CACHE_CHECK([for working mktime], ac_cv_func_working_mktime,
-[AC_TRY_RUN(
-[/* Test program from Paul Eggert (eggert@twinsun.com)
- and Tony Leneis (tony@plaza.ds.adp.com). */
-#if TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# if HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-# include <time.h>
-# endif
-#endif
-
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
-#if !HAVE_ALARM
-# define alarm(X) /* empty */
-#endif
-
-/* Work around redefinition to rpl_putenv by other config tests. */
-#undef putenv
-
-static time_t time_t_max;
-
-/* Values we'll use to set the TZ environment variable. */
-static const char *const tz_strings[] = {
- (const char *) 0, "TZ=GMT0", "TZ=JST-9",
- "TZ=EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00"
-};
-#define N_STRINGS (sizeof (tz_strings) / sizeof (tz_strings[0]))
-
-/* Fail if mktime fails to convert a date in the spring-forward gap.
- Based on a problem report from Andreas Jaeger. */
-static void
-spring_forward_gap ()
-{
- /* glibc (up to about 1998-10-07) failed this test) */
- struct tm tm;
-
- /* Use the portable POSIX.1 specification "TZ=PST8PDT,M4.1.0,M10.5.0"
- instead of "TZ=America/Vancouver" in order to detect the bug even
- on systems that don't support the Olson extension, or don't have the
- full zoneinfo tables installed. */
- putenv ("TZ=PST8PDT,M4.1.0,M10.5.0");
-
- tm.tm_year = 98;
- tm.tm_mon = 3;
- tm.tm_mday = 5;
- tm.tm_hour = 2;
- tm.tm_min = 0;
- tm.tm_sec = 0;
- tm.tm_isdst = -1;
- if (mktime (&tm) == (time_t)-1)
- exit (1);
-}
-
-static void
-mktime_test (now)
- time_t now;
-{
- struct tm *lt;
- if ((lt = localtime (&now)) && mktime (lt) != now)
- exit (1);
- now = time_t_max - now;
- if ((lt = localtime (&now)) && mktime (lt) != now)
- exit (1);
-}
-
-static void
-irix_6_4_bug ()
-{
- /* Based on code from Ariel Faigon. */
- struct tm tm;
- tm.tm_year = 96;
- tm.tm_mon = 3;
- tm.tm_mday = 0;
- tm.tm_hour = 0;
- tm.tm_min = 0;
- tm.tm_sec = 0;
- tm.tm_isdst = -1;
- mktime (&tm);
- if (tm.tm_mon != 2 || tm.tm_mday != 31)
- exit (1);
-}
-
-static void
-bigtime_test (j)
- int j;
-{
- struct tm tm;
- time_t now;
- tm.tm_year = tm.tm_mon = tm.tm_mday = tm.tm_hour = tm.tm_min = tm.tm_sec = j;
- now = mktime (&tm);
- if (now != (time_t) -1)
- {
- struct tm *lt = localtime (&now);
- if (! (lt
- && lt->tm_year == tm.tm_year
- && lt->tm_mon == tm.tm_mon
- && lt->tm_mday == tm.tm_mday
- && lt->tm_hour == tm.tm_hour
- && lt->tm_min == tm.tm_min
- && lt->tm_sec == tm.tm_sec
- && lt->tm_yday == tm.tm_yday
- && lt->tm_wday == tm.tm_wday
- && ((lt->tm_isdst < 0 ? -1 : 0 < lt->tm_isdst)
- == (tm.tm_isdst < 0 ? -1 : 0 < tm.tm_isdst))))
- exit (1);
- }
-}
-
-int
-main ()
-{
- time_t t, delta;
- int i, j;
-
- /* This test makes some buggy mktime implementations loop.
- Give up after 60 seconds; a mktime slower than that
- isn't worth using anyway. */
- alarm (60);
-
- for (time_t_max = 1; 0 < time_t_max; time_t_max *= 2)
- continue;
- time_t_max--;
- delta = time_t_max / 997; /* a suitable prime number */
- for (i = 0; i < N_STRINGS; i++)
- {
- if (tz_strings[i])
- putenv (tz_strings[i]);
-
- for (t = 0; t <= time_t_max - delta; t += delta)
- mktime_test (t);
- mktime_test ((time_t) 60 * 60);
- mktime_test ((time_t) 60 * 60 * 24);
-
- for (j = 1; 0 < j; j *= 2)
- bigtime_test (j);
- bigtime_test (j - 1);
- }
- irix_6_4_bug ();
- spring_forward_gap ();
- exit (0);
-}],
-ac_cv_func_working_mktime=yes, ac_cv_func_working_mktime=no,
-ac_cv_func_working_mktime=no)])
-if test $ac_cv_func_working_mktime = no; then
- LIBOBJS="$LIBOBJS mktime.${ac_objext}"
-fi
-AC_SUBST(LIBOBJS)dnl
-])# AC_FUNC_MKTIME
-
-# AC_C_VOLATILE
-# -------------
-# Note that, unlike const, #defining volatile to be the empty string can
-# actually turn a correct program into an incorrect one, since removing
-# uses of volatile actually grants the compiler permission to perform
-# optimizations that could break the user's code. So, do not #define
-# volatile away unless it is really necessary to allow the user's code
-# to compile cleanly. Benign compiler failures should be tolerated.
-AC_DEFUN(AC_C_VOLATILE,
-[AC_REQUIRE([AC_PROG_CC_STDC])dnl
-AC_CACHE_CHECK([for working volatile], ac_cv_c_volatile,
-[AC_TRY_COMPILE(,[
-volatile int x;
-int * volatile y;],
-ac_cv_c_volatile=yes, ac_cv_c_volatile=no)])
-if test $ac_cv_c_volatile = no; then
- AC_DEFINE(volatile,,
- [Define to empty if the keyword `volatile' does not work.
- Warning: valid code using `volatile' can become incorrect
- without. Disable with care.])
-fi
-])
-
-# AC_C_PROTOTYPES
-# ---------------
-# Check if the C compiler supports prototypes, included if it needs
-# options.
-AC_DEFUN(AC_C_PROTOTYPES,
-[AC_REQUIRE([AC_PROG_CC_STDC])dnl
-AC_REQUIRE([AC_PROG_CPP])dnl
-AC_MSG_CHECKING([for function prototypes])
-if test "$ac_cv_prog_cc_stdc" != no; then
- AC_MSG_RESULT(yes)
- AC_DEFINE(PROTOTYPES, 1,
- [Define if the compiler supports function prototypes.])
-else
- AC_MSG_RESULT(no)
-fi
-])# AC_C_PROTOTYPES
-
-dnl The following is a bit different from the prerelease autoconf at
-dnl this time since that requires extra definitions.
-
-dnl By default, many hosts won't let programs access large files;
-dnl one must use special compiler options to get large-file access to work.
-dnl For more details about this brain damage please see:
-dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
-
-dnl Written by Paul Eggert <eggert@twinsun.com>.
-
-dnl Internal subroutine of AC_SYS_LARGEFILE.
-dnl AC_SYS_LARGEFILE_TEST_INCLUDES
-AC_DEFUN(AC_SYS_LARGEFILE_TEST_INCLUDES,
- [[#include <sys/types.h>
- int a[(off_t) 9223372036854775807 == 9223372036854775807 ? 1 : -1];
- ]])
-
-dnl Internal subroutine of AC_SYS_LARGEFILE.
-dnl AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR, COMMENT, INCLUDES, FUNCTION-BODY)
-AC_DEFUN(AC_SYS_LARGEFILE_MACRO_VALUE,
- [AC_CACHE_CHECK([for $1 value needed for large files], $3,
- [$3=no
- AC_TRY_COMPILE([$5],
- [$6],
- ,
- [AC_TRY_COMPILE([#define $1 $2]
-[$5]
- ,
- [$6],
- [$3=$2])])])
- if test "[$]$3" != no; then
- AC_DEFINE_UNQUOTED([$1], [$]$3, [$4])
- fi])
-
-AC_DEFUN(AC_SYS_LARGEFILE,
- [AC_REQUIRE([AC_PROG_CC])
- AC_ARG_ENABLE(largefile,
- [ --disable-largefile omit support for large files])
- if test "$enable_largefile" != no; then
-
- AC_CACHE_CHECK([for special C compiler options needed for large files],
- ac_cv_sys_largefile_CC,
- [ac_cv_sys_largefile_CC=no
- if test "$GCC" != yes; then
- # IRIX 6.2 and later do not support large files by default,
- # so use the C compiler's -n32 option if that helps.
- AC_TRY_COMPILE(AC_SYS_LARGEFILE_TEST_INCLUDES, , ,
- [ac_save_CC="$CC"
- CC="$CC -n32"
- AC_TRY_COMPILE(AC_SYS_LARGEFILE_TEST_INCLUDES, ,
- ac_cv_sys_largefile_CC=' -n32')
- CC="$ac_save_CC"])
- fi])
- if test "$ac_cv_sys_largefile_CC" != no; then
- CC="$CC$ac_cv_sys_largefile_CC"
- fi
-
- AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64,
- ac_cv_sys_file_offset_bits,
- [Number of bits in a file offset, on hosts where this is settable.],
- AC_SYS_LARGEFILE_TEST_INCLUDES)
- AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
- ac_cv_sys_large_files,
- [Define for large files, on AIX-style hosts.]
- AC_SYS_LARGEFILE_TEST_INCLUDES)
- fi
- ])
-
-AC_DEFUN(AC_FUNC_FSEEKO,
- [AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE, 1,
- ac_cv_sys_largefile_source,
- [Define to make fseeko visible on some hosts (e.g. glibc 2.2).],
- [#include <stdio.h>], [return !fseeko;])
- # We used to try defining _XOPEN_SOURCE=500 too, to work around a bug
- # in glibc 2.1.3, but that breaks too many other things.
- # If you want fseeko and ftello with glibc, upgrade to a fixed glibc.
-
- AC_CACHE_CHECK([for fseeko], ac_cv_func_fseeko,
- [ac_cv_func_fseeko=no
- AC_TRY_LINK([#include <stdio.h>],
- [return fseeko && fseeko (stdin, 0, 0);],
- [ac_cv_func_fseeko=yes])])
- if test $ac_cv_func_fseeko != no; then
- AC_DEFINE(HAVE_FSEEKO, 1,
- [Define if fseeko (and presumably ftello) exists and is declared.])
- fi])
-
-undefine([AC_FUNC_MMAP])dnl
-dnl The autoconf 2.13 version loses on OSF, at least,
-dnl by messing up the declaration of malloc.
-AC_DEFUN([AC_FUNC_MMAP],
-[AC_CHECK_HEADERS(stdlib.h unistd.h sys/stat.h)
-AC_CHECK_FUNCS(getpagesize)
-AC_CACHE_CHECK(for working mmap, ac_cv_func_mmap_fixed_mapped,
-[AC_TRY_RUN(
-[/* Thanks to Mike Haertel and Jim Avera for this test.
- Here is a matrix of mmap possibilities:
- mmap private not fixed
- mmap private fixed at somewhere currently unmapped
- mmap private fixed at somewhere already mapped
- mmap shared not fixed
- mmap shared fixed at somewhere currently unmapped
- mmap shared fixed at somewhere already mapped
- For private mappings, we should verify that changes cannot be read()
- back from the file, nor mmap's back from the file at a different
- address. (There have been systems where private was not correctly
- implemented like the infamous i386 svr4.0, and systems where the
- VM page cache was not coherent with the file system buffer cache
- like early versions of FreeBSD and possibly contemporary NetBSD.)
- For shared mappings, we should conversely verify that changes get
- propogated back to all the places they're supposed to be.
-
- Grep wants private fixed already mapped.
- The main things grep needs to know about mmap are:
- * does it exist and is it safe to write into the mmap'd area
- * how to use it (BSD variants) */
-#include <sys/types.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-
-#if STDC_HEADERS || HAVE_STDLIB_H
-# include <stdlib.h>
-#else
-char *malloc ();
-#endif
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-#if HAVE_SYS_STAT_H
-# include <sys/stat.h>
-#endif
-
-/* This mess was copied from the GNU getpagesize.h. */
-#if !HAVE_GETPAGESIZE
-/* Assume that all systems that can run configure have sys/param.h. */
-# if !HAVE_SYS_PARAM_H
-# define HAVE_SYS_PARAM_H 1
-# endif
-
-# ifdef _SC_PAGESIZE
-# define getpagesize() sysconf(_SC_PAGESIZE)
-# else /* no _SC_PAGESIZE */
-# if HAVE_SYS_PARAM_H
-# include <sys/param.h>
-# ifdef EXEC_PAGESIZE
-# define getpagesize() EXEC_PAGESIZE
-# else /* no EXEC_PAGESIZE */
-# ifdef NBPG
-# define getpagesize() NBPG * CLSIZE
-# ifndef CLSIZE
-# define CLSIZE 1
-# endif /* no CLSIZE */
-# else /* no NBPG */
-# ifdef NBPC
-# define getpagesize() NBPC
-# else /* no NBPC */
-# ifdef PAGESIZE
-# define getpagesize() PAGESIZE
-# endif /* PAGESIZE */
-# endif /* no NBPC */
-# endif /* no NBPG */
-# endif /* no EXEC_PAGESIZE */
-# else /* no HAVE_SYS_PARAM_H */
-# define getpagesize() 8192 /* punt totally */
-# endif /* no HAVE_SYS_PARAM_H */
-# endif /* no _SC_PAGESIZE */
-
-#endif /* no HAVE_GETPAGESIZE */
-
-int
-main ()
-{
- char *data, *data2, *data3;
- int i, pagesize;
- int fd;
-
- pagesize = getpagesize ();
-
- /* First, make a file with some known garbage in it. */
- data = (char *) malloc (pagesize);
- if (!data)
- exit (1);
- for (i = 0; i < pagesize; ++i)
- *(data + i) = rand ();
- umask (0);
- fd = creat ("conftestmmap", 0600);
- if (fd < 0)
- exit (1);
- if (write (fd, data, pagesize) != pagesize)
- exit (1);
- close (fd);
-
- /* Next, try to mmap the file at a fixed address which already has
- something else allocated at it. If we can, also make sure that
- we see the same garbage. */
- fd = open ("conftestmmap", O_RDWR);
- if (fd < 0)
- exit (1);
- data2 = (char *) malloc (2 * pagesize);
- if (!data2)
- exit (1);
- data2 += (pagesize - ((int) data2 & (pagesize - 1))) & (pagesize - 1);
- if (data2 != mmap (data2, pagesize, PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_FIXED, fd, 0L))
- exit (1);
- for (i = 0; i < pagesize; ++i)
- if (*(data + i) != *(data2 + i))
- exit (1);
-
- /* Finally, make sure that changes to the mapped area do not
- percolate back to the file as seen by read(). (This is a bug on
- some variants of i386 svr4.0.) */
- for (i = 0; i < pagesize; ++i)
- *(data2 + i) = *(data2 + i) + 1;
- data3 = (char *) malloc (pagesize);
- if (!data3)
- exit (1);
- if (read (fd, data3, pagesize) != pagesize)
- exit (1);
- for (i = 0; i < pagesize; ++i)
- if (*(data + i) != *(data3 + i))
- exit (1);
- close (fd);
- unlink ("conftestmmap");
- exit (0);
-}], ac_cv_func_mmap_fixed_mapped=yes, ac_cv_func_mmap_fixed_mapped=no,
-ac_cv_func_mmap_fixed_mapped=no)])
-if test $ac_cv_func_mmap_fixed_mapped = yes; then
- AC_DEFINE(HAVE_MMAP, 1,
- [Define if you have a working `mmap' system call.])
-fi
-])# AC_FUNC_MMAP
-
-) dnl ifelse
HCoop / bpt / emacs.git / commitdiff