mirror of
https://github.com/OpenVPN/openvpn.git
synced 2025-05-09 05:31:05 +08:00
bdd80be1fe
Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com> Acked-by: David Sommerseth <davids@redhat.com> Signed-off-by: David Sommerseth <davids@redhat.com>
41 lines
837 B
Plaintext
41 lines
837 B
Plaintext
dnl @synopsis AX_EMPTY_ARRAY
|
|
dnl
|
|
dnl Define EMPTY_ARRAY_SIZE to be either "0"
|
|
dnl or "" depending on which syntax the compiler
|
|
dnl prefers for empty arrays in structs.
|
|
dnl
|
|
dnl @version
|
|
dnl @author James Yonan <jim@yonan.net>
|
|
AC_DEFUN([AX_EMPTY_ARRAY], [
|
|
AS_VAR_PUSHDEF([VAR],[ax_cv_c_empty_array])dnl
|
|
AC_CACHE_CHECK(
|
|
[for C compiler empty array size],
|
|
[VAR],
|
|
[AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
,
|
|
[[
|
|
struct { int foo; int bar[0]; } mystruct;
|
|
]]
|
|
)],
|
|
[VAR=0],
|
|
[AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
,
|
|
[[
|
|
struct { int foo; int bar[]; } mystruct;
|
|
]]
|
|
)],
|
|
[VAR=],
|
|
[AC_MSG_ERROR([C compiler is unable to creaty empty arrays])]
|
|
)]
|
|
)]
|
|
)dnl
|
|
AC_DEFINE_UNQUOTED(
|
|
[EMPTY_ARRAY_SIZE],
|
|
[$VAR],
|
|
[Dimension to use for empty array declaration]
|
|
)dnl
|
|
AS_VAR_POPDEF([VAR])dnl
|
|
])
|