Commit | Line | Data |
---|---|---|
2196f55f YQ |
1 | # Enable large files on systems where this is not the default. |
2 | ||
5e8754f9 | 3 | # Copyright 1992-1996, 1998-2016 Free Software Foundation, Inc. |
2196f55f YQ |
4 | # This file is free software; the Free Software Foundation |
5 | # gives unlimited permission to copy and/or distribute it, | |
6 | # with or without modifications, as long as this notice is preserved. | |
7 | ||
4a626d0a PA |
8 | # The following implementation works around a problem in autoconf <= 2.69; |
9 | # AC_SYS_LARGEFILE does not configure for large inodes on Mac OS X 10.5, | |
10 | # or configures them incorrectly in some cases. | |
11 | m4_version_prereq([2.70], [] ,[ | |
2196f55f YQ |
12 | |
13 | # _AC_SYS_LARGEFILE_TEST_INCLUDES | |
14 | # ------------------------------- | |
15 | m4_define([_AC_SYS_LARGEFILE_TEST_INCLUDES], | |
16 | [@%:@include <sys/types.h> | |
17 | /* Check that off_t can represent 2**63 - 1 correctly. | |
18 | We can't simply define LARGE_OFF_T to be 9223372036854775807, | |
19 | since some C++ compilers masquerading as C compilers | |
20 | incorrectly reject 9223372036854775807. */ | |
21 | @%:@define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62)) | |
22 | int off_t_is_large[[(LARGE_OFF_T % 2147483629 == 721 | |
23 | && LARGE_OFF_T % 2147483647 == 1) | |
24 | ? 1 : -1]];[]dnl | |
25 | ]) | |
26 | ||
27 | ||
28 | # _AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, | |
4a626d0a PA |
29 | # CACHE-VAR, |
30 | # DESCRIPTION, | |
31 | # PROLOGUE, [FUNCTION-BODY]) | |
2196f55f YQ |
32 | # -------------------------------------------------------- |
33 | m4_define([_AC_SYS_LARGEFILE_MACRO_VALUE], | |
34 | [AC_CACHE_CHECK([for $1 value needed for large files], [$3], | |
35 | [while :; do | |
36 | m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])( | |
37 | [AC_LANG_PROGRAM([$5], [$6])], | |
38 | [$3=no; break]) | |
39 | m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])( | |
40 | [AC_LANG_PROGRAM([@%:@define $1 $2 | |
41 | $5], [$6])], | |
42 | [$3=$2; break]) | |
43 | $3=unknown | |
44 | break | |
45 | done]) | |
46 | case $$3 in #( | |
47 | no | unknown) ;; | |
48 | *) AC_DEFINE_UNQUOTED([$1], [$$3], [$4]);; | |
49 | esac | |
50 | rm -rf conftest*[]dnl | |
51 | ])# _AC_SYS_LARGEFILE_MACRO_VALUE | |
52 | ||
53 | ||
54 | # AC_SYS_LARGEFILE | |
55 | # ---------------- | |
56 | # By default, many hosts won't let programs access large files; | |
57 | # one must use special compiler options to get large-file access to work. | |
58 | # For more details about this brain damage please see: | |
59 | # http://www.unix-systems.org/version2/whatsnew/lfs20mar.html | |
60 | AC_DEFUN([AC_SYS_LARGEFILE], | |
61 | [AC_ARG_ENABLE(largefile, | |
62 | [ --disable-largefile omit support for large files]) | |
63 | if test "$enable_largefile" != no; then | |
64 | ||
65 | AC_CACHE_CHECK([for special C compiler options needed for large files], | |
66 | ac_cv_sys_largefile_CC, | |
67 | [ac_cv_sys_largefile_CC=no | |
68 | if test "$GCC" != yes; then | |
69 | ac_save_CC=$CC | |
70 | while :; do | |
71 | # IRIX 6.2 and later do not support large files by default, | |
72 | # so use the C compiler's -n32 option if that helps. | |
73 | AC_LANG_CONFTEST([AC_LANG_PROGRAM([_AC_SYS_LARGEFILE_TEST_INCLUDES])]) | |
74 | AC_COMPILE_IFELSE([], [break]) | |
75 | CC="$CC -n32" | |
76 | AC_COMPILE_IFELSE([], [ac_cv_sys_largefile_CC=' -n32'; break]) | |
77 | break | |
78 | done | |
79 | CC=$ac_save_CC | |
80 | rm -f conftest.$ac_ext | |
81 | fi]) | |
82 | if test "$ac_cv_sys_largefile_CC" != no; then | |
83 | CC=$CC$ac_cv_sys_largefile_CC | |
84 | fi | |
85 | ||
86 | _AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64, | |
87 | ac_cv_sys_file_offset_bits, | |
88 | [Number of bits in a file offset, on hosts where this is settable.], | |
89 | [_AC_SYS_LARGEFILE_TEST_INCLUDES]) | |
90 | if test $ac_cv_sys_file_offset_bits = unknown; then | |
91 | _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, | |
92 | ac_cv_sys_large_files, | |
93 | [Define for large files, on AIX-style hosts.], | |
94 | [_AC_SYS_LARGEFILE_TEST_INCLUDES]) | |
95 | fi | |
96 | ||
4a626d0a PA |
97 | AC_DEFINE([_DARWIN_USE_64_BIT_INODE], [1], |
98 | [Enable large inode numbers on Mac OS X 10.5.]) | |
2196f55f YQ |
99 | fi |
100 | ])# AC_SYS_LARGEFILE | |
4a626d0a | 101 | ])# m4_version_prereq 2.70 |
2196f55f YQ |
102 | |
103 | # Enable large files on systems where this is implemented by Gnulib, not by the | |
104 | # system headers. | |
105 | # Set the variables WINDOWS_64_BIT_OFF_T, WINDOWS_64_BIT_ST_SIZE if Gnulib | |
106 | # overrides ensure that off_t or 'struct size.st_size' are 64-bit, respectively. | |
107 | AC_DEFUN([gl_LARGEFILE], | |
108 | [ | |
109 | AC_REQUIRE([AC_CANONICAL_HOST]) | |
110 | case "$host_os" in | |
111 | mingw*) | |
112 | dnl Native Windows. | |
113 | dnl mingw64 defines off_t to a 64-bit type already, if | |
114 | dnl _FILE_OFFSET_BITS=64, which is ensured by AC_SYS_LARGEFILE. | |
115 | AC_CACHE_CHECK([for 64-bit off_t], [gl_cv_type_off_t_64], | |
116 | [AC_COMPILE_IFELSE( | |
117 | [AC_LANG_PROGRAM( | |
118 | [[#include <sys/types.h> | |
119 | int verify_off_t_size[sizeof (off_t) >= 8 ? 1 : -1]; | |
120 | ]], | |
121 | [[]])], | |
122 | [gl_cv_type_off_t_64=yes], [gl_cv_type_off_t_64=no]) | |
123 | ]) | |
124 | if test $gl_cv_type_off_t_64 = no; then | |
125 | WINDOWS_64_BIT_OFF_T=1 | |
126 | else | |
127 | WINDOWS_64_BIT_OFF_T=0 | |
128 | fi | |
5e8754f9 SDJ |
129 | dnl But all native Windows platforms (including mingw64) have a 32-bit |
130 | dnl st_size member in 'struct stat'. | |
131 | WINDOWS_64_BIT_ST_SIZE=1 | |
2196f55f YQ |
132 | ;; |
133 | *) | |
134 | dnl Nothing to do on gnulib's side. | |
135 | dnl A 64-bit off_t is | |
136 | dnl - already the default on Mac OS X, FreeBSD, NetBSD, OpenBSD, IRIX, | |
137 | dnl OSF/1, Cygwin, | |
138 | dnl - enabled by _FILE_OFFSET_BITS=64 (ensured by AC_SYS_LARGEFILE) on | |
139 | dnl glibc, HP-UX, Solaris, | |
140 | dnl - enabled by _LARGE_FILES=1 (ensured by AC_SYS_LARGEFILE) on AIX, | |
141 | dnl - impossible to achieve on Minix 3.1.8. | |
142 | WINDOWS_64_BIT_OFF_T=0 | |
143 | WINDOWS_64_BIT_ST_SIZE=0 | |
144 | ;; | |
145 | esac | |
146 | ]) |