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-rw-r--r--acinclude.m475
1 files changed, 75 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4
new file mode 100644
index 000000000..2809dcfc4
--- /dev/null
+++ b/acinclude.m4
@@ -0,0 +1,75 @@
+#serial 12
+
+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
+
+dnl Written by Paul Eggert <eggert@twinsun.com>.
+
+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];
+ ]])
+
+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.])
+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;])
+ fi
+ ])