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23 lines (21 sloc) 0.695 kB
dnl check compiler flags
AC_DEFUN([AC_TRY_FALLOCATE],
[dnl
AC_MSG_CHECKING([whether fallocate is supported])
AC_RUN_IFELSE([
AC_LANG_PROGRAM([[
#include <unistd.h>
#include <fcntl.h>
]], [[
int fd = creat("/tmp/fallocate", 0666), result = fallocate(fd, 0, 0, 1024);
(void) unlink("/tmp/fallocate");
return result;
]])
], [
AH_TEMPLATE([FALLOCATE_IS_SUPPORTED], [Define to 1 if the fallocate() function is supported])
AC_DEFINE([FALLOCATE_IS_SUPPORTED])
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
])
])
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