+ dnl cygwin iconv.h defines iconv_open as libiconv_open
+ if test x"$ac_cv_func_iconv_open" != x"yes"; then
+ AC_CHECK_FUNC(libiconv_open, [ac_cv_func_iconv_open=yes; AC_DEFINE(HAVE_ICONV_OPEN, 1)])
+ fi
+
++dnl Preallocation stuff (also fallocate, posix_fallocate function tests above):
++
++AC_CACHE_CHECK([for useable fallocate],rsync_cv_have_fallocate,[
++AC_TRY_LINK([#include <fcntl.h>
++#include <sys/types.h>],
++[fallocate(0, 0, 0, 0);],
++rsync_cv_have_fallocate=yes,rsync_cv_have_fallocate=no)])
++if test x"$rsync_cv_have_fallocate" = x"yes"; then
++ AC_DEFINE(HAVE_FALLOCATE, 1, [Define to 1 if you have the fallocate function and it compiles and links without error])
++fi
++
++AC_CACHE_CHECK([for SYS_fallocate],rsync_cv_have_sys_fallocate,[
++AC_TRY_COMPILE([#include <sys/syscall.h>
++#include <sys/types.h>],
++[syscall(SYS_fallocate, 0, 0, (loff_t)0, (loff_t)0);],
++rsync_cv_have_sys_fallocate=yes,rsync_cv_have_sys_fallocate=no)])
++if test x"$rsync_cv_have_sys_fallocate" = x"yes"; then
++ AC_DEFINE(HAVE_SYS_FALLOCATE, 1, [Define to 1 if you have the SYS_fallocate syscall number])
++fi
++
++if test x"$ac_cv_func_posix_fallocate" = x"yes"; then
++ AC_MSG_CHECKING([whether posix_fallocate is efficient])
++ case $host_os in
++ *cygwin*)
++ AC_MSG_RESULT(yes)
++ AC_DEFINE(HAVE_EFFICIENT_POSIX_FALLOCATE, 1,
++ [Define if posix_fallocate is efficient (Cygwin)])
++ ;;
++ *)
++ AC_MSG_RESULT(no)
++ ;;
++ esac
++fi
++
++dnl End of preallocation stuff
++