diff options
Diffstat (limited to 'm4/largefile.m4')
| -rw-r--r-- | m4/largefile.m4 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/m4/largefile.m4 b/m4/largefile.m4 index f6863e46c49..e381339c40c 100644 --- a/m4/largefile.m4 +++ b/m4/largefile.m4 @@ -1,10 +1,27 @@ # Enable large files on systems where this is not the default. +# Enable support for files on Linux file systems with 64-bit inode numbers. # Copyright 1992-1996, 1998-2020 Free Software Foundation, Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. +# The following macro works around a problem in Autoconf's AC_FUNC_FSEEKO: +# It does not set _LARGEFILE_SOURCE=1 on HP-UX/ia64 32-bit, although this +# setting of _LARGEFILE_SOURCE is needed so that <stdio.h> declares fseeko +# and ftello in C++ mode as well. +AC_DEFUN([gl_SET_LARGEFILE_SOURCE], +[ + AC_REQUIRE([AC_CANONICAL_HOST]) + AC_FUNC_FSEEKO + case "$host_os" in + hpux*) + AC_DEFINE([_LARGEFILE_SOURCE], [1], + [Define to 1 to make fseeko visible on some hosts (e.g. glibc 2.2).]) + ;; + esac +]) + # The following implementation works around a problem in autoconf <= 2.69; # AC_SYS_LARGEFILE does not configure for large inodes on Mac OS X 10.5, # or configures them incorrectly in some cases. @@ -57,6 +74,9 @@ rm -rf conftest*[]dnl # one must use special compiler options to get large-file access to work. # For more details about this brain damage please see: # http://www.unix.org/version2/whatsnew/lfs20mar.html +# Additionally, on Linux file systems with 64-bit inodes a file that happens +# to have a 64-bit inode number cannot be accessed by 32-bit applications on +# Linux x86/x86_64. This can occur with file systems such as XFS and NFS. AC_DEFUN([AC_SYS_LARGEFILE], [AC_ARG_ENABLE(largefile, [ --disable-largefile omit support for large files]) |