allow for ioplugin to default to off, enabling with --enable-ioplugin

configure

@@ -718,6 +718,7 @@ infodir
 docdir
 oldincludedir
 includedir
+runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -746,6 +747,7 @@ enable_protochain
 with_pcap
 with_libnl
 enable_ipv6
+enable_ioplugin
 with_dag
 with_dag_includes
 with_dag_libraries
@@ -816,6 +818,7 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
+runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@@ -1068,6 +1071,15 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
+  -runstatedir | --runstatedir | --runstatedi | --runstated \
+  | --runstate | --runstat | --runsta | --runst | --runs \
+  | --run | --ru | --r)
+    ac_prev=runstatedir ;;
+  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+  | --run=* | --ru=* | --r=*)
+    runstatedir=$ac_optarg ;;
+
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1205,7 +1217,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir
+		libdir localedir mandir runstatedir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1358,6 +1370,7 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -1395,6 +1408,8 @@ Optional Features:
   --disable-largefile     omit support for large files
   --disable-protochain    disable \"protochain\" insn
   --enable-ipv6           build IPv6-capable version [default=yes]
+  --enable-ioplugin       build support for loading I/O plugins that can do
+                          compression, etc. [default=no]
   --enable-remote         enable remote packet capture [default=no]
   --disable-remote        disable remote packet capture
   --enable-optimizer-dbg  build optimizer debugging code
@@ -4619,7 +4634,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -4665,7 +4680,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -4689,7 +4704,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -4734,7 +4749,7 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -4758,7 +4773,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -7386,6 +7401,22 @@ $as_echo "#define INET6 1" >>confdefs.h
 
 fi
 
+# Check whether --enable-ioplugin was given.
+if test "${enable_ioplugin+set}" = set; then :
+  enableval=$enable_ioplugin;
+else
+  enable_ioplugin=no
+fi
+
+if test "$enable_ioplugin" != "yes"; then
+	#
+	# Turn on pluggable I/O modules
+	#
+
+$as_echo "#define HAVE_IOPLUGIN 1" >>confdefs.h
+
+fi
+
 # Check for Endace DAG card support.
 
 # Check whether --with-dag was given.

configure.ac

@@ -1136,6 +1136,17 @@ if test "$enable_ipv6" != "no"; then
 	AC_DEFINE(INET6,1,[IPv6])
 fi
 
+AC_ARG_ENABLE(ioplugin,
+AC_HELP_STRING([--enable-ioplugin],[build support for loading I/O plugins that can do compression, etc. @<:@default=no@:>@]),
+    [],
+    [enable_ioplugin=no])
+if test "$enable_ioplugin" != "yes"; then
+	#
+	# Turn on pluggable I/O modules
+	#
+	AC_DEFINE(HAVE_IOPLUGIN,1,[ioplugin])
+fi
+
 # Check for Endace DAG card support.
 AC_ARG_WITH([dag],
 AC_HELP_STRING([--with-dag@<:@=DIR@:>@],[include Endace DAG support (located in directory DIR, if supplied).  @<:@default=yes, if present@:>@]),

pcap-ioplugin.c

@@ -161,7 +161,7 @@ pcap_ioplugin_init(const char *name)
 		goto fail;
 	}
 
-#if HAVE_DLOPEN
+#if HAVE_DLOPEN && WANT_IOPLUGIN
 	lib = dlopen(name, RTLD_NOW);
 	if (lib != NULL) {
 		pcap_ioplugin_init_fn ioplugin_init = dlsym(lib, "ioplugin_init");