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This check was used to accommodate a staggering variety in particular in the type of the third argument of accept(). This is no longer of concern on currently supported systems. We can just use socklen_t in the code and put in a simple check that substitutes int for socklen_t if it's missing, to cover the few stragglers. Reviewed-by: Andres Freund <andres@anarazel.de> Discussion: https://www.postgresql.org/message-id/3538f4c4-1886-64f2-dcff-aaad8267fb82@enterprisedb.compull/73/head
Peter Eisentraut
4 years ago
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4cd046c203
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# config/ac_func_accept_argtypes.m4 |
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# This comes from the official Autoconf macro archive at |
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# <http://research.cys.de/autoconf-archive/> |
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|
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|
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dnl @synopsis AC_FUNC_ACCEPT_ARGTYPES |
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dnl |
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dnl Checks the data types of the three arguments to accept(). Results are |
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dnl placed into the symbols ACCEPT_TYPE_RETURN and ACCEPT_TYPE_ARG[123], |
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dnl consistent with the following example: |
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dnl |
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dnl #define ACCEPT_TYPE_RETURN int |
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dnl #define ACCEPT_TYPE_ARG1 int |
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dnl #define ACCEPT_TYPE_ARG2 struct sockaddr * |
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dnl #define ACCEPT_TYPE_ARG3 socklen_t |
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dnl |
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dnl NOTE: This is just a modified version of the AC_FUNC_SELECT_ARGTYPES |
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dnl macro. Credit for that one goes to David MacKenzie et. al. |
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dnl |
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dnl @version $Id: ac_func_accept_argtypes.m4,v 1.1 1999/12/03 11:29:29 simons Exp $ |
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dnl @author Daniel Richard G. <skunk@mit.edu> |
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dnl |
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|
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# PostgreSQL local changes: In the original version ACCEPT_TYPE_ARG3 |
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# is a pointer type. That's kind of useless because then you can't |
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# use the macro to define a corresponding variable. We also make the |
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# reasonable(?) assumption that you can use arg3 for getsocktype etc. |
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# as well (i.e., anywhere POSIX.2 has socklen_t). |
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# |
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# arg2 can also be `const' (e.g., RH 4.2). Change the order of tests |
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# for arg3 so that `int' is first, in case there is no prototype at all. |
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# |
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# Solaris 7 and 8 have arg3 as 'void *' (disguised as 'Psocklen_t' |
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# which is *not* 'socklen_t *'). If we detect that, then we assume |
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# 'int' as the result, because that ought to work best. |
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# |
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# On Win32, accept() returns 'unsigned int PASCAL' |
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# Win64 uses SOCKET for return and arg1 |
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|
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AC_DEFUN([AC_FUNC_ACCEPT_ARGTYPES], |
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[AC_MSG_CHECKING([types of arguments for accept()]) |
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AC_CACHE_VAL(ac_cv_func_accept_return,dnl |
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[AC_CACHE_VAL(ac_cv_func_accept_arg1,dnl |
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[AC_CACHE_VAL(ac_cv_func_accept_arg2,dnl |
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[AC_CACHE_VAL(ac_cv_func_accept_arg3,dnl |
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[for ac_cv_func_accept_return in 'int' 'SOCKET WSAAPI' 'unsigned int PASCAL'; do |
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for ac_cv_func_accept_arg1 in 'int' 'SOCKET' 'unsigned int'; do |
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for ac_cv_func_accept_arg2 in 'struct sockaddr *' 'const struct sockaddr *' 'void *'; do |
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for ac_cv_func_accept_arg3 in 'int' 'size_t' 'socklen_t' 'unsigned int' 'void'; do |
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AC_COMPILE_IFELSE([AC_LANG_SOURCE( |
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[#include <sys/types.h> |
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#include <sys/socket.h> |
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extern $ac_cv_func_accept_return accept ($ac_cv_func_accept_arg1, $ac_cv_func_accept_arg2, $ac_cv_func_accept_arg3 *);])], |
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[ac_not_found=no; break 4], [ac_not_found=yes]) |
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done |
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done |
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done |
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done |
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if test "$ac_not_found" = yes; then |
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AC_MSG_ERROR([could not determine argument types]) |
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fi |
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if test "$ac_cv_func_accept_arg3" = "void"; then |
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ac_cv_func_accept_arg3=int |
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fi |
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])dnl AC_CACHE_VAL |
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])dnl AC_CACHE_VAL |
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])dnl AC_CACHE_VAL |
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])dnl AC_CACHE_VAL |
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AC_MSG_RESULT([$ac_cv_func_accept_return, $ac_cv_func_accept_arg1, $ac_cv_func_accept_arg2, $ac_cv_func_accept_arg3 *]) |
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AC_DEFINE_UNQUOTED(ACCEPT_TYPE_RETURN, $ac_cv_func_accept_return, |
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[Define to the return type of 'accept']) |
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AC_DEFINE_UNQUOTED(ACCEPT_TYPE_ARG1, $ac_cv_func_accept_arg1, |
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[Define to the type of arg 1 of 'accept']) |
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AC_DEFINE_UNQUOTED(ACCEPT_TYPE_ARG2, $ac_cv_func_accept_arg2, |
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[Define to the type of arg 2 of 'accept']) |
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AC_DEFINE_UNQUOTED(ACCEPT_TYPE_ARG3, $ac_cv_func_accept_arg3, |
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[Define to the type of arg 3 of 'accept']) |
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]) |
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