| # 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, 1998-2021 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. |
| m4_version_prereq([2.70], [], [ |
| |
| # _AC_SYS_LARGEFILE_TEST_INCLUDES |
| # ------------------------------- |
| m4_define([_AC_SYS_LARGEFILE_TEST_INCLUDES], |
| [#include <sys/types.h> |
| /* Check that off_t can represent 2**63 - 1 correctly. |
| We can't simply define LARGE_OFF_T to be 9223372036854775807, |
| since some C++ compilers masquerading as C compilers |
| incorrectly reject 9223372036854775807. */ |
| #define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31)) |
| int off_t_is_large[[(LARGE_OFF_T % 2147483629 == 721 |
| && LARGE_OFF_T % 2147483647 == 1) |
| ? 1 : -1]];[]dnl |
| ]) |
| |
| |
| # _AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, |
| # CACHE-VAR, |
| # DESCRIPTION, |
| # PROLOGUE, [FUNCTION-BODY]) |
| # -------------------------------------------------------- |
| m4_define([_AC_SYS_LARGEFILE_MACRO_VALUE], |
| [AC_CACHE_CHECK([for $1 value needed for large files], [$3], |
| [while :; do |
| m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])( |
| [AC_LANG_PROGRAM([$5], [$6])], |
| [$3=no; break]) |
| m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])( |
| [AC_LANG_PROGRAM([#define $1 $2 |
| $5], [$6])], |
| [$3=$2; break]) |
| $3=unknown |
| break |
| done]) |
| case $$3 in #( |
| no | unknown) ;; |
| *) AC_DEFINE_UNQUOTED([$1], [$$3], [$4]);; |
| esac |
| rm -rf conftest*[]dnl |
| ])# _AC_SYS_LARGEFILE_MACRO_VALUE |
| |
| |
| # AC_SYS_LARGEFILE |
| # ---------------- |
| # By default, many hosts won't let programs access large files; |
| # one must use special compiler options to get large-file access to work. |
| # For more details about this brain damage please see: |
| # http://www.unix.org/version2/whatsnew/lfs20mar.html |
| # Additionally, on Linux file systems with 64-bit inodes a file that happens |
| # to have a 64-bit inode number cannot be accessed by 32-bit applications on |
| # Linux x86/x86_64. This can occur with file systems such as XFS and NFS. |
| AC_DEFUN([AC_SYS_LARGEFILE], |
| [AC_ARG_ENABLE(largefile, |
| [ --disable-largefile omit support for large files]) |
| if test "$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 "$GCC" != yes; then |
| ac_save_CC=$CC |
| while :; do |
| # IRIX 6.2 and later do not support large files by default, |
| # so use the C compiler's -n32 option if that helps. |
| AC_LANG_CONFTEST([AC_LANG_PROGRAM([_AC_SYS_LARGEFILE_TEST_INCLUDES])]) |
| AC_COMPILE_IFELSE([], [break]) |
| CC="$CC -n32" |
| AC_COMPILE_IFELSE([], [ac_cv_sys_largefile_CC=' -n32'; break]) |
| break |
| done |
| CC=$ac_save_CC |
| rm -f conftest.$ac_ext |
| fi]) |
| if test "$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]) |
| if test $ac_cv_sys_file_offset_bits = unknown; then |
| _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, |
| ac_cv_sys_large_files, |
| [Define for large files, on AIX-style hosts.], |
| [_AC_SYS_LARGEFILE_TEST_INCLUDES]) |
| fi |
| fi |
| ])# AC_SYS_LARGEFILE |
| ])# m4_version_prereq 2.70 |
| |
| # Enable large files on systems where this is implemented by Gnulib, not by the |
| # system headers. |
| # Set the variables WINDOWS_64_BIT_OFF_T, WINDOWS_64_BIT_ST_SIZE if Gnulib |
| # overrides ensure that off_t or 'struct size.st_size' are 64-bit, respectively. |
| AC_DEFUN([gl_LARGEFILE], |
| [ |
| AC_REQUIRE([AC_CANONICAL_HOST]) |
| case "$host_os" in |
| mingw*) |
| dnl Native Windows. |
| dnl mingw64 defines off_t to a 64-bit type already, if |
| dnl _FILE_OFFSET_BITS=64, which is ensured by AC_SYS_LARGEFILE. |
| AC_CACHE_CHECK([for 64-bit off_t], [gl_cv_type_off_t_64], |
| [AC_COMPILE_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <sys/types.h> |
| int verify_off_t_size[sizeof (off_t) >= 8 ? 1 : -1]; |
| ]], |
| [[]])], |
| [gl_cv_type_off_t_64=yes], [gl_cv_type_off_t_64=no]) |
| ]) |
| if test $gl_cv_type_off_t_64 = no; then |
| WINDOWS_64_BIT_OFF_T=1 |
| else |
| WINDOWS_64_BIT_OFF_T=0 |
| fi |
| dnl Some mingw versions define, if _FILE_OFFSET_BITS=64, 'struct stat' |
| dnl to 'struct _stat32i64' or 'struct _stat64' (depending on |
| dnl _USE_32BIT_TIME_T), which has a 32-bit st_size member. |
| AC_CACHE_CHECK([for 64-bit st_size], [gl_cv_member_st_size_64], |
| [AC_COMPILE_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <sys/types.h> |
| struct stat buf; |
| int verify_st_size_size[sizeof (buf.st_size) >= 8 ? 1 : -1]; |
| ]], |
| [[]])], |
| [gl_cv_member_st_size_64=yes], [gl_cv_member_st_size_64=no]) |
| ]) |
| if test $gl_cv_member_st_size_64 = no; then |
| WINDOWS_64_BIT_ST_SIZE=1 |
| else |
| WINDOWS_64_BIT_ST_SIZE=0 |
| fi |
| ;; |
| *) |
| dnl Nothing to do on gnulib's side. |
| dnl A 64-bit off_t is |
| dnl - already the default on Mac OS X, FreeBSD, NetBSD, OpenBSD, IRIX, |
| dnl OSF/1, Cygwin, |
| dnl - enabled by _FILE_OFFSET_BITS=64 (ensured by AC_SYS_LARGEFILE) on |
| dnl glibc, HP-UX, Solaris, |
| dnl - enabled by _LARGE_FILES=1 (ensured by AC_SYS_LARGEFILE) on AIX, |
| dnl - impossible to achieve on Minix 3.1.8. |
| WINDOWS_64_BIT_OFF_T=0 |
| WINDOWS_64_BIT_ST_SIZE=0 |
| ;; |
| esac |
| ]) |