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105 lines
3.5 KiB
Plaintext
105 lines
3.5 KiB
Plaintext
# Enable large files on systems where this is not the default.
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# Copyright 1992-1996, 1998-2011 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# The following implementation works around a problem in autoconf <= 2.68;
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# AC_SYS_LARGEFILE does not configure for large inodes on Mac OS X 10.5.
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m4_version_prereq([2.69], [] ,[
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# _AC_SYS_LARGEFILE_TEST_INCLUDES
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# -------------------------------
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m4_define([_AC_SYS_LARGEFILE_TEST_INCLUDES],
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[@%:@include <sys/types.h>
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/* Check that off_t can represent 2**63 - 1 correctly.
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We can't simply define LARGE_OFF_T to be 9223372036854775807,
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since some C++ compilers masquerading as C compilers
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incorrectly reject 9223372036854775807. */
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@%:@define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
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int off_t_is_large[[(LARGE_OFF_T % 2147483629 == 721
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&& LARGE_OFF_T % 2147483647 == 1)
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? 1 : -1]];[]dnl
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])
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# _AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE,
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# CACHE-VAR,
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# DESCRIPTION,
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# PROLOGUE, [FUNCTION-BODY])
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# --------------------------------------------------------
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m4_define([_AC_SYS_LARGEFILE_MACRO_VALUE],
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[AC_CACHE_CHECK([for $1 value needed for large files], [$3],
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[while :; do
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m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])(
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[AC_LANG_PROGRAM([$5], [$6])],
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[$3=no; break])
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m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])(
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[AC_LANG_PROGRAM([@%:@define $1 $2
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$5], [$6])],
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[$3=$2; break])
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$3=unknown
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break
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done])
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case $$3 in #(
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no | unknown) ;;
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*) AC_DEFINE_UNQUOTED([$1], [$$3], [$4]);;
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esac
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rm -rf conftest*[]dnl
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])# _AC_SYS_LARGEFILE_MACRO_VALUE
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# AC_SYS_LARGEFILE
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# ----------------
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# By default, many hosts won't let programs access large files;
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# one must use special compiler options to get large-file access to work.
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# For more details about this brain damage please see:
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# http://www.unix-systems.org/version2/whatsnew/lfs20mar.html
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AC_DEFUN([AC_SYS_LARGEFILE],
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[AC_ARG_ENABLE(largefile,
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[ --disable-largefile omit support for large files])
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if test "$enable_largefile" != no; then
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AC_CACHE_CHECK([for special C compiler options needed for large files],
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ac_cv_sys_largefile_CC,
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[ac_cv_sys_largefile_CC=no
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if test "$GCC" != yes; then
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ac_save_CC=$CC
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while :; do
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# IRIX 6.2 and later do not support large files by default,
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# so use the C compiler's -n32 option if that helps.
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AC_LANG_CONFTEST([AC_LANG_PROGRAM([_AC_SYS_LARGEFILE_TEST_INCLUDES])])
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AC_COMPILE_IFELSE([], [break])
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CC="$CC -n32"
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AC_COMPILE_IFELSE([], [ac_cv_sys_largefile_CC=' -n32'; break])
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break
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done
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CC=$ac_save_CC
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rm -f conftest.$ac_ext
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fi])
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if test "$ac_cv_sys_largefile_CC" != no; then
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CC=$CC$ac_cv_sys_largefile_CC
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fi
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_AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64,
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ac_cv_sys_file_offset_bits,
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[Number of bits in a file offset, on hosts where this is settable.],
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[_AC_SYS_LARGEFILE_TEST_INCLUDES])
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if test $ac_cv_sys_file_offset_bits = unknown; then
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_AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
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ac_cv_sys_large_files,
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[Define for large files, on AIX-style hosts.],
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[_AC_SYS_LARGEFILE_TEST_INCLUDES])
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fi
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AH_VERBATIM([_DARWIN_USE_64_BIT_INODE],
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[/* Enable large inode numbers on Mac OS X. */
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#ifndef _DARWIN_USE_64_BIT_INODE
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# define _DARWIN_USE_64_BIT_INODE 1
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#endif])
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fi
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])# AC_SYS_LARGEFILE
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])# m4_version_prereq 2.69
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