-dnl Internal subroutine of AC_SYS_LARGEFILE.
-dnl AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR, COMMENT, INCLUDES, FUNCTION-BODY)
-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
- ,
- [$6],
- ,
- [AC_TRY_COMPILE([#define $1 $2]
-AC_SYS_LARGEFILE_TEST_INCLUDES
-$5
- ,
- [$6],
- [$3=$2])])])
- if test "[$]$3" != no; then
- AC_DEFINE_UNQUOTED([$1], [$]$3, [$4])
- fi])
-
-AC_DEFUN(AC_SYS_LARGEFILE,
- [AC_ARG_ENABLE(largefile,
- [ --disable-largefile omit support for large files])
- if test "$enable_largefile" != no; then
-
- 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 "$GCC" != yes; then
- # IRIX 6.2 and later do not support large files by default,
- # so use the C compiler's -n32 option if that helps.
- AC_TRY_COMPILE(AC_SYS_LARGEFILE_TEST_INCLUDES, , ,
- [ac_save_CC="$CC"
- CC="$CC -n32"
- AC_TRY_COMPILE(AC_SYS_LARGEFILE_TEST_INCLUDES, ,
- ac_cv_sys_largefile_CC=' -n32')
- CC="$ac_save_CC"])
- fi])
- if test "$ac_cv_sys_largefile_CC" != no; then
- CC="$CC$ac_cv_sys_largefile_CC"
- 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_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;])
- AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1,
- ac_cv_sys_large_files,
- [Define for large files, on AIX-style hosts.])
- AC_SYS_LARGEFILE_MACRO_VALUE(_XOPEN_SOURCE, 500,
- ac_cv_sys_xopen_source,
- [Define to make ftello visible on some hosts (e.g. glibc 2.1.3).],
- [#include <stdio.h>], [return !ftello;])
- fi
- ])