X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Flargefile.m4;h=1e605e3d82946d686cb475f1423700f710a4a8aa;hb=9f15e6702a27649a59263a7ed571805a979d9e70;hp=bf3b9656a8a4fa3bc6e64f2390fcc0c402d59acb;hpb=0b5a75e761c770f269931bb525780216b178b82f;p=gnulib.git diff --git a/m4/largefile.m4 b/m4/largefile.m4 index bf3b9656a..1e605e3d8 100644 --- a/m4/largefile.m4 +++ b/m4/largefile.m4 @@ -1,134 +1,146 @@ -#serial 11 +# 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 . +# 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. -[ hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)] - if test "$GCC" = yes; then - ac_cv_sys_largefile_CFLAGS=-D__STDC_EXT__ - fi - ;; - # IRIX 6.2 and later do not support large files by default, - # so use the -n32 ABI unless the installer said otherwise. -[ irix6.[2-9]* | irix6.1[0-9]* | irix[7-9].* | irix[1-9][0-9]*)] - if test "$GCC" != yes; then - case "$CC $CFLAGS " in - *' -o32 '*|*' -n32 '*|*' -64 '*) ;; - *) ac_cv_sys_largefile_CFLAGS=-n32 ;; - esac - fi - esac - if test "$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 + /* 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 - $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 - ]) - 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 "$host_os" in - # HP-UX 10.20 and later -[ hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)] - ac_cv_sys_file_offset_bits=64 ;; - esac]) - AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE, - ac_cv_sys_largefile_source, - [Define to make ftello visible on some hosts (e.g. HP-UX 10.20).], - [AC_TRY_COMPILE([#include ], [return !ftello;], , - [AC_TRY_COMPILE([#define _LARGEFILE_SOURCE 1 -#include ], [return !ftello;], - ac_cv_sys_largefile_source=1)])]) - AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, - ac_cv_sys_large_files, - [Define for large files, on AIX-style hosts.], - [case "$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]) - AC_SYS_LARGEFILE_MACRO_VALUE(_XOPEN_SOURCE, - ac_cv_sys_xopen_source, - [Define to make ftello visible on some hosts (e.g. glibc 2.1.3).], - [AC_TRY_COMPILE([#include ], [return !ftello;], , - [AC_TRY_COMPILE([#define _XOPEN_SOURCE 500 -#include ], - [return !ftello;], - ac_cv_sys_xopen_source=500)])]) - 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 + 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 +])