add OSF/1 LDSHARED; add IRIX5 conditional for sockets
diff --git a/configure.in b/configure.in
index 1f7e2a8..f471614 100644
--- a/configure.in
+++ b/configure.in
@@ -115,6 +115,7 @@
SunOS/4*) LDSHARED="ld";;
SunOS/5*) LDSHARED="ld -G";;
hp*|HP*) LDSHARED="ld -b";;
+ OSF*) LDSHARED="ld -shared -expect_unresolved \"*\"";;
DYNIX/ptx*) LDSHARED="ld -G";;
*) LDSHARED="ld";;
esac
@@ -145,9 +146,18 @@
AC_CHECK_LIB(dl, dlopen) # Dynamic linking for SunOS/Solaris and SYSV
AC_CHECK_LIB(dld, shl_load) # Dynamic linking for HP-UX
AC_CHECK_LIB(sun, getpwnam) # NIS (== YP) interface for IRIX 4
+# The following three (nsl,inet,socket) are needed on Sequent;
+# the order of checking must be this. Most SVR4 platforms will
+# need -lsocket and -lnsl. However on SGI IRIX 5, these exist but
+# broken. I see no elegant solution (probably CHECK_LIB should be
+# fixed to only add the library if the given entry point is not
+# satisfied without it).
+if test "`uname -s`" != IRIX
+then
AC_CHECK_LIB(nsl, t_open, [LIBS="-lnsl $LIBS"]) # SVR4
AC_CHECK_LIB(inet, gethostbyname, [LIBS="-linet $LIBS"], [], -lnsl) # Sequent
AC_CHECK_LIB(socket, socket, [LIBS="-lsocket $LIBS"], [], $LIBS) # SVR4 sockets
+fi
AC_MSG_CHECKING(for --with-readline)
AC_ARG_WITH(readline, [--with-readline=DIRECTORY GNU readline], [