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mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-11-26 07:33:47 +00:00

(AC_SYS_LARGEFILE, AC_SYS_LARGEFILE_MACRO_VALUE):

Merge fixes from latest GNU tar version.  These macros no longer
futz with _XOPEN_SOURCE, as that was not portable in practice.
(AC_FUNC_FSEEKO): New macro.
This commit is contained in:
Gerd Moellmann 2000-12-11 11:54:38 +00:00
parent 64a04a42fe
commit 00d04b7265

43
aclocal.m4 vendored
View File

@ -301,14 +301,11 @@ dnl AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR, COMMENT, INCLUDES, F
AC_DEFUN(AC_SYS_LARGEFILE_MACRO_VALUE,
[AC_CACHE_CHECK([for $1 value needed for large files], $3,
[$3=no
AC_TRY_COMPILE(AC_SYS_LARGEFILE_TEST_INCLUDES
$5
,
AC_TRY_COMPILE([$5],
[$6],
,
[AC_TRY_COMPILE([#define $1 $2]
AC_SYS_LARGEFILE_TEST_INCLUDES
$5
[$5]
,
[$6],
[$3=$2])])])
@ -317,7 +314,8 @@ $5
fi])
AC_DEFUN(AC_SYS_LARGEFILE,
[AC_ARG_ENABLE(largefile,
[AC_REQUIRE([AC_PROG_CC])
AC_ARG_ENABLE(largefile,
[ --disable-largefile omit support for large files])
if test "$enable_largefile" != no; then
@ -340,21 +338,34 @@ AC_DEFUN(AC_SYS_LARGEFILE,
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_MACRO_VALUE(_LARGEFILE_SOURCE, 1,
ac_cv_sys_largefile_source,
[Define to make ftello visible on some hosts (e.g. HP-UX 10.20).],
[#include <stdio.h>], [return !ftello;])
[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_MACRO_VALUE(_XOPEN_SOURCE, 500,
ac_cv_sys_xopen_source,
[Define to make ftello visible on some hosts (e.g. glibc 2.1.3).],
[#include <stdio.h>], [return !ftello;])
[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.