1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
dnl @synopsis AX_BSWAP64
dnl
dnl This macro will check for a built in way of endian reversing an int64_t.
dnl If one is found then HAVE_BSWAP64 is set to 1 and BSWAP64 will be defined
dnl to the name of the endian swap function.
dnl
dnl @category C
dnl @author Martin Ebourne
dnl @version 2006/02/02
dnl @license AllPermissive
AC_DEFUN([AX_BSWAP64], [
bswap64_function=""
AC_CHECK_HEADERS([sys/endian.h asm/byteorder.h])
if test "x$ac_cv_header_sys_endian_h" = "xyes"; then
AC_CACHE_CHECK([for htobe64], [have_htobe64],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
$ac_includes_default
#include <sys/endian.h>
]], [[
htobe64(0);
return 1;
]])],
[have_htobe64=yes], [have_htobe64=no]
)])
if test "x$have_htobe64" = "xyes"; then
bswap64_function=htobe64
fi
fi
if test "x$bswap64_function" = "x" && \
test "x$ac_cv_header_asm_byteorder_h" = "xyes"; then
AC_CACHE_CHECK([for __cpu_to_be64], [have___cpu_to_be64],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
$ac_includes_default
#include <asm/byteorder.h>
]], [[
__cpu_to_be64(0);
return 1;
]])],
[have___cpu_to_be64=yes], [have___cpu_to_be64=no]
)])
if test "x$have___cpu_to_be64" = "xyes"; then
bswap64_function=__cpu_to_be64
fi
fi
if test "x$bswap64_function" != "x"; then
AC_DEFINE([HAVE_BSWAP64], 1,
[Define to 1 if BSWAP64 is defined to the name of a valid 64 bit endian swapping function])
AC_DEFINE_UNQUOTED([BSWAP64], [$bswap64_function], [Name of the 64 bit endian swapping function])
fi
])dnl
|