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Albert Chin's patch posted to the mailing list 19 Apr 2001

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This commit is contained in:
Daniel Stenberg 2001-04-19 06:01:48 +00:00
parent 5dd1cb0614
commit 8755c44d40
1 changed files with 36 additions and 19 deletions
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55
acinclude.m4
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@ -1,4 +1,4 @@
#serial 12
#serial 19
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.
@ -11,7 +11,14 @@ dnl Internal subroutine of AC_SYS_LARGEFILE.
dnl AC_SYS_LARGEFILE_TEST_INCLUDES
AC_DEFUN(AC_SYS_LARGEFILE_TEST_INCLUDES,
[[#include <sys/types.h>
int a[(off_t) 9223372036854775807 == 9223372036854775807 ? 1 : -1];
/* Check that off_t can represent 2**63 - 1 correctly.
We can't simply "#define LARGE_OFF_T 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 Internal subroutine of AC_SYS_LARGEFILE.
@ -19,14 +26,11 @@ dnl AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR, COMMENT, INCLUDES, F
AC_DEFUN(AC_SYS_LARGEFILE_MACRO_VALUE,
[AC_CACHE_CHECK([for $1 value needed for large files], $3,
[$3=no
AC_TRY_COMPILE(AC_SYS_LARGEFILE_TEST_INCLUDES
$5
,
AC_TRY_COMPILE([$5],
[$6],
,
[AC_TRY_COMPILE([#define $1 $2]
AC_SYS_LARGEFILE_TEST_INCLUDES
$5
[$5]
,
[$6],
[$3=$2])])])
@ -35,7 +39,8 @@ $5
fi])
AC_DEFUN(AC_SYS_LARGEFILE,
[AC_ARG_ENABLE(largefile,
[AC_REQUIRE([AC_PROG_CC])
AC_ARG_ENABLE(largefile,
[ --disable-largefile omit support for large files])
if test "$enable_largefile" != no; then
@ -58,18 +63,30 @@ AC_DEFUN(AC_SYS_LARGEFILE,
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_MACRO_VALUE(_LARGEFILE_SOURCE, 1,
ac_cv_sys_largefile_source,
[Define to make ftello visible on some hosts (e.g. HP-UX 10.20).],
[#include <stdio.h>], [return !ftello;])
[Number of bits in a file offset, on hosts where this is settable.],
AC_SYS_LARGEFILE_TEST_INCLUDES)
AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
ac_cv_sys_large_files,
[Define for large files, on AIX-style hosts.])
dnl lftp does not need ftello, and _XOPEN_SOURCE=500 makes resolv.h fail.
dnl AC_SYS_LARGEFILE_MACRO_VALUE(_XOPEN_SOURCE, 500,
dnl ac_cv_sys_xopen_source,
dnl [Define to make ftello visible on some hosts (e.g. glibc 2.1.3).],
dnl [#include <stdio.h>], [return !ftello;])
[Define for large files, on AIX-style hosts.],
AC_SYS_LARGEFILE_TEST_INCLUDES)
fi
])
AC_DEFUN(AC_FUNC_FSEEKO,
[AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE, 1,
ac_cv_sys_largefile_source,
[Define to make fseeko visible on some hosts (e.g. glibc 2.2).],
[#include <stdio.h>], [return !fseeko;])
# We used to try defining _XOPEN_SOURCE=500 too, to work around a bug
# in glibc 2.1.3, but that breaks too many other things.
# If you want fseeko and ftello with glibc, upgrade to a fixed glibc.
AC_CACHE_CHECK([for fseeko], ac_cv_func_fseeko,
[ac_cv_func_fseeko=no
AC_TRY_LINK([#include <stdio.h>],
[return fseeko && fseeko (stdin, 0, 0);],
[ac_cv_func_fseeko=yes])])
if test $ac_cv_func_fseeko != no; then
AC_DEFINE(HAVE_FSEEKO, 1,
[Define if fseeko (and presumably ftello) exists and is declared.])
fi])