ETR_SOCKET_NSL
, 

2005年09月02日

Warren Young <warren@etr-usa.com>

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Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. Users of this software should generally follow the principles of the MIT License includings its disclaimer.

cryp.to ac-archive's Obsoleted (obsoleted)

• obsoleted Use LIB_SOCKET_NSL instead.

This macro figures out what libraries are required on this platform to link sockets programs. It's usually -lsocket and/or -lnsl or neither. We test for all three combinations.

AC_DEFUN([ETR_SOCKET_NSL],
[
AC_CACHE_CHECK(for libraries containing socket functions,
ac_cv_socket_libs, [
 oCFLAGS=$CFLAGS
 AC_TRY_LINK([
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 ],
 [
 struct in_addr add;
 int sd = socket(AF_INET, SOCK_STREAM, 0);
 inet_ntoa(add);
 ],
 ac_cv_socket_libs=-lc, ac_cv_socket_libs=no)
 if test x"$ac_cv_socket_libs" = "xno"
 then
 CFLAGS="$oCFLAGS -lsocket"
 AC_TRY_LINK([
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 ],
 [
 struct in_addr add;
 int sd = socket(AF_INET, SOCK_STREAM, 0);
 inet_ntoa(add);
 ],
 ac_cv_socket_libs=-lsocket, ac_cv_socket_libs=no)
 fi
 if test x"$ac_cv_socket_libs" = "xno"
 then
 CFLAGS="$oCFLAGS -lsocket -lnsl"
 AC_TRY_LINK([
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 ],
 [
 struct in_addr add;
 int sd = socket(AF_INET, SOCK_STREAM, 0);
 inet_ntoa(add);
 ],
 ac_cv_socket_libs="-lsocket -lnsl", ac_cv_socket_libs=no)
 fi
 CFLAGS=$oCFLAGS
])
 if test x"$ac_cv_socket_libs" = "xno"
 then
 AC_MSG_ERROR([Cannot find socket libraries])
 elif test x"$ac_cv_socket_libs" = "x-lc"
 then
 ETR_SOCKET_LIBS=""
 else
 ETR_SOCKET_LIBS="$ac_cv_socket_libs"
 fi
 AC_SUBST(ETR_SOCKET_LIBS)
]) dnl ETR_SOCKET_NSL