1*4b169a6bSchristos# socketlib.m4 serial 3 2*4b169a6bSchristosdnl Copyright (C) 2008-2022 Free Software Foundation, Inc. 3*4b169a6bSchristosdnl This file is free software; the Free Software Foundation 4*4b169a6bSchristosdnl gives unlimited permission to copy and/or distribute it, 5*4b169a6bSchristosdnl with or without modifications, as long as this notice is preserved. 6*4b169a6bSchristos 7*4b169a6bSchristosdnl gl_SOCKETLIB 8*4b169a6bSchristosdnl Determines the library to use for socket functions. 9*4b169a6bSchristosdnl Sets and AC_SUBSTs LIBSOCKET. 10*4b169a6bSchristos 11*4b169a6bSchristosAC_DEFUN([gl_SOCKETLIB], 12*4b169a6bSchristos[ 13*4b169a6bSchristos gl_PREREQ_SYS_H_WINSOCK2 dnl for HAVE_WINSOCK2_H 14*4b169a6bSchristos LIBSOCKET= 15*4b169a6bSchristos if test $HAVE_WINSOCK2_H = 1; then 16*4b169a6bSchristos dnl Native Windows API (not Cygwin). 17*4b169a6bSchristos dnl If the function WSAStartup exists (declared in <winsock2.h> and 18*4b169a6bSchristos dnl defined through -lws2_32), we need to call it. 19*4b169a6bSchristos AC_CACHE_CHECK([for WSAStartup], 20*4b169a6bSchristos [gl_cv_func_wsastartup], [ 21*4b169a6bSchristos gl_save_LIBS="$LIBS" 22*4b169a6bSchristos LIBS="$LIBS -lws2_32" 23*4b169a6bSchristos AC_LINK_IFELSE( 24*4b169a6bSchristos [AC_LANG_PROGRAM([[ 25*4b169a6bSchristos#ifdef HAVE_WINSOCK2_H 26*4b169a6bSchristos# include <winsock2.h> 27*4b169a6bSchristos#endif]], [[ 28*4b169a6bSchristos WORD wVersionRequested = MAKEWORD(1, 1); 29*4b169a6bSchristos WSADATA wsaData; 30*4b169a6bSchristos int err = WSAStartup(wVersionRequested, &wsaData); 31*4b169a6bSchristos WSACleanup (); 32*4b169a6bSchristos ]]) 33*4b169a6bSchristos ], 34*4b169a6bSchristos [gl_cv_func_wsastartup=yes], 35*4b169a6bSchristos [gl_cv_func_wsastartup=no]) 36*4b169a6bSchristos LIBS="$gl_save_LIBS" 37*4b169a6bSchristos ]) 38*4b169a6bSchristos if test "$gl_cv_func_wsastartup" = "yes"; then 39*4b169a6bSchristos AC_DEFINE([WINDOWS_SOCKETS], [1], [Define if WSAStartup is needed.]) 40*4b169a6bSchristos LIBSOCKET='-lws2_32' 41*4b169a6bSchristos fi 42*4b169a6bSchristos else 43*4b169a6bSchristos dnl Unix API. 44*4b169a6bSchristos dnl Solaris has most socket functions in libsocket. 45*4b169a6bSchristos dnl Haiku has most socket functions in libnetwork. 46*4b169a6bSchristos dnl BeOS has most socket functions in libnet. 47*4b169a6bSchristos dnl On HP-UX, do NOT link with libxnet, because in 64-bit mode this would 48*4b169a6bSchristos dnl break code (e.g. in libraries) that invokes accept(), getpeername(), 49*4b169a6bSchristos dnl getsockname(), getsockopt(), or recvfrom() with a 32-bit addrlen. See 50*4b169a6bSchristos dnl "man xopen_networking" for details. 51*4b169a6bSchristos AC_CACHE_CHECK([for library containing setsockopt], [gl_cv_lib_socket], [ 52*4b169a6bSchristos gl_cv_lib_socket= 53*4b169a6bSchristos AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern 54*4b169a6bSchristos#ifdef __cplusplus 55*4b169a6bSchristos"C" 56*4b169a6bSchristos#endif 57*4b169a6bSchristoschar setsockopt();]], [[setsockopt();]])], 58*4b169a6bSchristos [], 59*4b169a6bSchristos [gl_save_LIBS="$LIBS" 60*4b169a6bSchristos LIBS="$gl_save_LIBS -lsocket" 61*4b169a6bSchristos AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern 62*4b169a6bSchristos#ifdef __cplusplus 63*4b169a6bSchristos"C" 64*4b169a6bSchristos#endif 65*4b169a6bSchristoschar setsockopt();]], [[setsockopt();]])], 66*4b169a6bSchristos [gl_cv_lib_socket="-lsocket"]) 67*4b169a6bSchristos if test -z "$gl_cv_lib_socket"; then 68*4b169a6bSchristos LIBS="$gl_save_LIBS -lnetwork" 69*4b169a6bSchristos AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern 70*4b169a6bSchristos#ifdef __cplusplus 71*4b169a6bSchristos"C" 72*4b169a6bSchristos#endif 73*4b169a6bSchristoschar setsockopt();]], [[setsockopt();]])], 74*4b169a6bSchristos [gl_cv_lib_socket="-lnetwork"]) 75*4b169a6bSchristos if test -z "$gl_cv_lib_socket"; then 76*4b169a6bSchristos LIBS="$gl_save_LIBS -lnet" 77*4b169a6bSchristos AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern 78*4b169a6bSchristos#ifdef __cplusplus 79*4b169a6bSchristos"C" 80*4b169a6bSchristos#endif 81*4b169a6bSchristoschar setsockopt();]], [[setsockopt();]])], 82*4b169a6bSchristos [gl_cv_lib_socket="-lnet"]) 83*4b169a6bSchristos fi 84*4b169a6bSchristos fi 85*4b169a6bSchristos LIBS="$gl_save_LIBS" 86*4b169a6bSchristos ]) 87*4b169a6bSchristos if test -z "$gl_cv_lib_socket"; then 88*4b169a6bSchristos gl_cv_lib_socket="none needed" 89*4b169a6bSchristos fi 90*4b169a6bSchristos ]) 91*4b169a6bSchristos if test "$gl_cv_lib_socket" != "none needed"; then 92*4b169a6bSchristos LIBSOCKET="$gl_cv_lib_socket" 93*4b169a6bSchristos fi 94*4b169a6bSchristos fi 95*4b169a6bSchristos AC_SUBST([LIBSOCKET]) 96*4b169a6bSchristos]) 97