-#serial 7
+# Enable large files on systems where this is not the default.
-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
+# Copyright 1992-1996, 1998-2013 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.
-dnl Written by Paul Eggert <eggert@twinsun.com>.
+# 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], [] ,[
-dnl Internal subroutine of AC_SYS_LARGEFILE.
-dnl AC_SYS_LARGEFILE_FLAGS(FLAGSNAME)
-AC_DEFUN(AC_SYS_LARGEFILE_FLAGS,
- [AC_CACHE_CHECK([for $1 value to request large file support],
- ac_cv_sys_largefile_$1,
- [if ($GETCONF LFS_$1) >conftest.1 2>conftest.2 && test ! -s conftest.2
- then
- ac_cv_sys_largefile_$1=`cat conftest.1`
- else
- ac_cv_sys_largefile_$1=no
- ifelse($1, CFLAGS,
- [case "$host_os" in
- # HP-UX 10.20 requires -D__STDC_EXT__ with gcc 2.95.1.
-changequote(, )dnl
- hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)
-changequote([, ])dnl
- if test "$GCC" = yes; then
- ac_cv_sys_largefile_CFLAGS=-D__STDC_EXT__
- fi
- ;;
- # IRIX 6.2 and later require cc -n32.
-changequote(, )dnl
- irix6.[2-9]* | irix6.1[0-9]* | irix[7-9].* | irix[1-9][0-9]*)
-changequote([, ])dnl
- if test "$GCC" != yes; then
- ac_cv_sys_largefile_CFLAGS=-n32
- fi
- esac
- if test "$ac_cv_sys_largefile_CFLAGS" != no; then
- ac_save_CC="$CC"
- CC="$CC $ac_cv_sys_largefile_CFLAGS"
- AC_TRY_LINK(, , , ac_cv_sys_largefile_CFLAGS=no)
- CC="$ac_save_CC"
- fi])
- fi
- rm -f conftest*])])
+# _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 << 62) - 1 + ((off_t) 1 << 62))
+ 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
-dnl Internal subroutine of AC_SYS_LARGEFILE.
-dnl AC_SYS_LARGEFILE_SPACE_APPEND(VAR, VAL)
-AC_DEFUN(AC_SYS_LARGEFILE_SPACE_APPEND,
- [case $2 in
- no) ;;
- ?*)
- case "[$]$1" in
- '') $1=$2 ;;
- *) $1=[$]$1' '$2 ;;
- esac ;;
- esac])
-dnl Internal subroutine of AC_SYS_LARGEFILE.
-dnl AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, CACHE-VAR, COMMENT, CODE-TO-SET-DEFAULT)
-AC_DEFUN(AC_SYS_LARGEFILE_MACRO_VALUE,
- [AC_CACHE_CHECK([for $1], $2,
- [$2=no
-changequote(, )dnl
- $4
- for ac_flag in $ac_cv_sys_largefile_CFLAGS no; do
- case "$ac_flag" in
- -D$1)
- $2=1 ;;
- -D$1=*)
- $2=`expr " $ac_flag" : '[^=]*=\(.*\)'` ;;
- esac
- done
-changequote([, ])dnl
- ])
- if test "[$]$2" != no; then
- AC_DEFINE_UNQUOTED([$1], [$]$2, [$3])
- fi])
+# AC_SYS_LARGEFILE
+# ----------------
+# By default, many hosts won't let programs access large files;
+# one must use special compiler options to get large-file access to work.
+# For more details about this brain damage please see:
+# http://www.unix-systems.org/version2/whatsnew/lfs20mar.html
+AC_DEFUN([AC_SYS_LARGEFILE],
+[AC_ARG_ENABLE(largefile,
+ [ --disable-largefile omit support for large files])
+if test "$enable_largefile" != no; then
-AC_DEFUN(AC_SYS_LARGEFILE,
- [AC_REQUIRE([AC_CANONICAL_HOST])
- AC_ARG_ENABLE(largefile,
- [ --disable-largefile omit support for large files])
- if test "$enable_largefile" != no; then
- AC_CHECK_TOOL(GETCONF, getconf)
- AC_SYS_LARGEFILE_FLAGS(CFLAGS)
- AC_SYS_LARGEFILE_FLAGS(LDFLAGS)
- AC_SYS_LARGEFILE_FLAGS(LIBS)
+ AC_CACHE_CHECK([for special C compiler options needed for large files],
+ ac_cv_sys_largefile_CC,
+ [ac_cv_sys_largefile_CC=no
+ if test "$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
- for ac_flag in $ac_cv_sys_largefile_CFLAGS no; do
- case "$ac_flag" in
- no) ;;
- -D_FILE_OFFSET_BITS=*) ;;
- -D_LARGEFILE_SOURCE | -D_LARGEFILE_SOURCE=*) ;;
- -D_LARGE_FILES | -D_LARGE_FILES=*) ;;
- -D?* | -I?*)
- AC_SYS_LARGEFILE_SPACE_APPEND(CPPFLAGS, "$ac_flag") ;;
- *)
- AC_SYS_LARGEFILE_SPACE_APPEND(CFLAGS, "$ac_flag") ;;
- esac
- done
- AC_SYS_LARGEFILE_SPACE_APPEND(LDFLAGS, "$ac_cv_sys_largefile_LDFLAGS")
- AC_SYS_LARGEFILE_SPACE_APPEND(LIBS, "$ac_cv_sys_largefile_LIBS")
- AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS,
- ac_cv_sys_file_offset_bits,
- [Number of bits in a file offset, on hosts where this is settable.],
- [case "$host_os" in
- # HP-UX 10.20 and later
- hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)
- ac_cv_sys_file_offset_bits=64 ;;
- esac])
- AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE,
- ac_cv_sys_largefile_source,
- [Define to make fseeko etc. visible, on some hosts.],
- [case "$host_os" in
- # HP-UX 10.20 and later
- hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)
- ac_cv_sys_largefile_source=1 ;;
- esac])
- AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES,
- ac_cv_sys_large_files,
- [Define for large files, on AIX-style hosts.],
- [case "$host_os" in
- # AIX 4.2 and later
- aix4.[2-9]* | aix4.1[0-9]* | aix[5-9].* | aix[1-9][0-9]*)
- ac_cv_sys_large_files=1 ;;
- esac])
- 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 $ac_cv_sys_file_offset_bits = unknown; then
+ _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
+ ac_cv_sys_large_files,
+ [Define for large files, on AIX-style hosts.],
+ [_AC_SYS_LARGEFILE_TEST_INCLUDES])
+ fi
+
+ AC_DEFINE([_DARWIN_USE_64_BIT_INODE], [1],
+ [Enable large inode numbers on Mac OS X 10.5.])
+fi
+])# AC_SYS_LARGEFILE
+])# m4_version_prereq 2.70
+
+# Enable large files on systems where this is implemented by Gnulib, not by the
+# system headers.
+# Set the variables WINDOWS_64_BIT_OFF_T, WINDOWS_64_BIT_ST_SIZE if Gnulib
+# overrides ensure that off_t or 'struct size.st_size' are 64-bit, respectively.
+AC_DEFUN([gl_LARGEFILE],
+[
+ AC_REQUIRE([AC_CANONICAL_HOST])
+ case "$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 But all native Windows platforms (including mingw64) have a 32-bit
+ dnl st_size member in 'struct stat'.
+ WINDOWS_64_BIT_ST_SIZE=1
+ ;;
+ *)
+ 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
+])
projects / gnulib.git / blobdiff