blob: 57b322830172a74d6c53701d3ccc1c9194282bc6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
#
# When allocating RWX memory, check whether we need to use /dev/zero
# as the file descriptor or not.
#
AC_DEFUN([AC_NEED_DEV_ZERO_FOR_MMAP],
[AC_CACHE_CHECK([if /dev/zero is needed for mmap],
ac_cv_need_dev_zero_for_mmap,
[if test "$llvm_cv_os_type" = "Interix" ; then
ac_cv_need_dev_zero_for_mmap=yes
else
ac_cv_need_dev_zero_for_mmap=no
fi
])
if test "$ac_cv_need_dev_zero_for_mmap" = yes; then
AC_DEFINE([NEED_DEV_ZERO_FOR_MMAP],[1],
[Define if /dev/zero should be used when mapping RWX memory, or undefine if its not necessary])
fi])
|
