| # config/ac_func_accept_argtypes.m4 |
| # This comes from the official Autoconf macro archive at |
| # <http://research.cys.de/autoconf-archive/> |
| |
| |
| dnl @synopsis AC_FUNC_ACCEPT_ARGTYPES |
| dnl |
| dnl Checks the data types of the three arguments to accept(). Results are |
| dnl placed into the symbols ACCEPT_TYPE_RETURN and ACCEPT_TYPE_ARG[123], |
| dnl consistent with the following example: |
| dnl |
| dnl #define ACCEPT_TYPE_RETURN int |
| dnl #define ACCEPT_TYPE_ARG1 int |
| dnl #define ACCEPT_TYPE_ARG2 struct sockaddr * |
| dnl #define ACCEPT_TYPE_ARG3 socklen_t |
| dnl |
| dnl This macro requires AC_CHECK_HEADERS to have already verified the |
| dnl presence or absence of sys/types.h and sys/socket.h. |
| dnl |
| dnl NOTE: This is just a modified version of the AC_FUNC_SELECT_ARGTYPES |
| dnl macro. Credit for that one goes to David MacKenzie et. al. |
| dnl |
| dnl @version Id: ac_func_accept_argtypes.m4,v 1.1 1999/12/03 11:29:29 simons Exp $ |
| dnl @author Daniel Richard G. <skunk@mit.edu> |
| dnl |
| |
| # PostgreSQL local changes: In the original version ACCEPT_TYPE_ARG3 |
| # is a pointer type. That's kind of useless because then you can't |
| # use the macro to define a corresponding variable. We also make the |
| # reasonable(?) assumption that you can use arg3 for getsocktype etc. |
| # as well (i.e., anywhere POSIX.2 has socklen_t). |
| # |
| # arg2 can also be `const' (e.g., RH 4.2). Change the order of tests |
| # for arg3 so that `int' is first, in case there is no prototype at all. |
| # |
| # Solaris 7 and 8 have arg3 as 'void *' (disguised as 'Psocklen_t' |
| # which is *not* 'socklen_t *'). If we detect that, then we assume |
| # 'int' as the result, because that ought to work best. |
| # |
| # On Win32, accept() returns 'unsigned int PASCAL' |
| # Win64 uses SOCKET for return and arg1 |
| |
| AC_DEFUN([AC_FUNC_ACCEPT_ARGTYPES], |
| [AC_MSG_CHECKING([types of arguments for accept()]) |
| AC_CACHE_VAL(ac_cv_func_accept_return,dnl |
| [AC_CACHE_VAL(ac_cv_func_accept_arg1,dnl |
| [AC_CACHE_VAL(ac_cv_func_accept_arg2,dnl |
| [AC_CACHE_VAL(ac_cv_func_accept_arg3,dnl |
| [for ac_cv_func_accept_return in 'int' 'unsigned int PASCAL' 'SOCKET'; do |
| for ac_cv_func_accept_arg1 in 'int' 'unsigned int' 'SOCKET'; do |
| for ac_cv_func_accept_arg2 in 'struct sockaddr *' 'const struct sockaddr *' 'void *'; do |
| for ac_cv_func_accept_arg3 in 'int' 'size_t' 'socklen_t' 'unsigned int' 'void'; do |
| AC_TRY_COMPILE( |
| [#ifdef HAVE_SYS_TYPES_H |
| #include <sys/types.h> |
| #endif |
| #ifdef HAVE_SYS_SOCKET_H |
| #include <sys/socket.h> |
| #endif |
| extern $ac_cv_func_accept_return accept ($ac_cv_func_accept_arg1, $ac_cv_func_accept_arg2, $ac_cv_func_accept_arg3 *);], |
| [], [ac_not_found=no; break 4], [ac_not_found=yes]) |
| done |
| done |
| done |
| done |
| if test "$ac_not_found" = yes; then |
| AC_MSG_ERROR([could not determine argument types]) |
| fi |
| if test "$ac_cv_func_accept_arg3" = "void"; then |
| ac_cv_func_accept_arg3=int |
| fi |
| ])dnl AC_CACHE_VAL |
| ])dnl AC_CACHE_VAL |
| ])dnl AC_CACHE_VAL |
| ])dnl AC_CACHE_VAL |
| AC_MSG_RESULT([$ac_cv_func_accept_return, $ac_cv_func_accept_arg1, $ac_cv_func_accept_arg2, $ac_cv_func_accept_arg3 *]) |
| AC_DEFINE_UNQUOTED(ACCEPT_TYPE_RETURN, $ac_cv_func_accept_return, |
| [Define to the return type of 'accept']) |
| AC_DEFINE_UNQUOTED(ACCEPT_TYPE_ARG1, $ac_cv_func_accept_arg1, |
| [Define to the type of arg 1 of 'accept']) |
| AC_DEFINE_UNQUOTED(ACCEPT_TYPE_ARG2, $ac_cv_func_accept_arg2, |
| [Define to the type of arg 2 of 'accept']) |
| AC_DEFINE_UNQUOTED(ACCEPT_TYPE_ARG3, $ac_cv_func_accept_arg3, |
| [Define to the type of arg 3 of 'accept']) |
| ]) |