Disable broker by default

Replaced the --disable-broker configure option with --enable-broker,
and changed the install docs to show CAF as an optional dependency.

configure

@@ -41,7 +41,8 @@ Usage: $0 [OPTION]... [VAR=VALUE]...
     --enable-perftools-debug use Google's perftools for debugging
     --enable-jemalloc      link against jemalloc
     --enable-ruby          build ruby bindings for broccoli (deprecated)
-    --disable-broker       disable use of the Broker communication library
+    --enable-broker        enable use of the Broker communication library
+                           (requires C++ Actor Framework)
     --disable-broccoli     don't build or install the Broccoli library
     --disable-broctl       don't install Broctl
     --disable-auxtools     don't build or install auxiliary tools
@@ -57,10 +58,10 @@ Usage: $0 [OPTION]... [VAR=VALUE]...
     --with-flex=PATH       path to flex executable
     --with-bison=PATH      path to bison executable
     --with-python=PATH     path to Python executable
-    --with-caf=PATH        path to C++ Actor Framework installation
-                           (a required Broker dependency)
 
   Optional Packages in Non-Standard Locations:
+    --with-caf=PATH        path to C++ Actor Framework installation
+                           (a required Broker dependency)
     --with-geoip=PATH      path to the libGeoIP install root
     --with-perftools=PATH  path to Google Perftools install root
     --with-jemalloc=PATH   path to jemalloc install root
@@ -121,13 +122,12 @@ append_cache_entry BRO_ROOT_DIR         PATH   $prefix
 append_cache_entry PY_MOD_INSTALL_DIR   PATH   $prefix/lib/broctl
 append_cache_entry BRO_SCRIPT_INSTALL_PATH STRING $prefix/share/bro
 append_cache_entry BRO_ETC_INSTALL_DIR  PATH   $prefix/etc
-append_cache_entry BROKER_PYTHON_HOME   PATH   $prefix
 append_cache_entry BROKER_PYTHON_BINDINGS BOOL false
 append_cache_entry ENABLE_DEBUG         BOOL   false
 append_cache_entry ENABLE_PERFTOOLS     BOOL   false
 append_cache_entry ENABLE_PERFTOOLS_DEBUG BOOL false
 append_cache_entry ENABLE_JEMALLOC      BOOL   false
-append_cache_entry ENABLE_BROKER        BOOL   true
+append_cache_entry ENABLE_BROKER        BOOL   false
 append_cache_entry BinPAC_SKIP_INSTALL  BOOL   true
 append_cache_entry BUILD_SHARED_LIBS    BOOL   true
 append_cache_entry INSTALL_AUX_TOOLS    BOOL   true
@@ -162,7 +162,7 @@ while [ $# -ne 0 ]; do
             append_cache_entry BRO_ROOT_DIR         PATH   $optarg
             append_cache_entry PY_MOD_INSTALL_DIR   PATH   $optarg/lib/broctl
 
-            if [ -z "$user_disabled_broker" ]; then
+            if [ -n "$user_enabled_broker" ]; then
                 append_cache_entry BROKER_PYTHON_HOME   PATH   $optarg
             fi
             ;;
@@ -199,10 +199,10 @@ while [ $# -ne 0 ]; do
         --enable-jemalloc)
             append_cache_entry ENABLE_JEMALLOC     BOOL   true
             ;;
-        --disable-broker)
+        --enable-broker)
-            append_cache_entry ENABLE_BROKER        BOOL   false
+            append_cache_entry ENABLE_BROKER        BOOL   true
-            remove_cache_entry BROKER_PYTHON_HOME
+            append_cache_entry BROKER_PYTHON_HOME   PATH   $prefix
-            user_disabled_broker="true"
+            user_enabled_broker="true"
             ;;
         --disable-broccoli)
             append_cache_entry INSTALL_BROCCOLI     BOOL   false

doc/install/install.rst

@@ -32,7 +32,6 @@ before you begin:
     * Libz
     * Bash (for BroControl)
     * Python (for BroControl)
-    * C++ Actor Framework (CAF) version 0.14 (http://actor-framework.org)
 
 To build Bro from source, the following additional dependencies are required:
 
@@ -47,8 +46,6 @@ To build Bro from source, the following additional dependencies are required:
     * zlib headers
     * Python
 
-To install CAF, first download the source code of the required version from: https://github.com/actor-framework/actor-framework/releases
-
 To install the required dependencies, you can use:
 
 * RPM/RedHat-based Linux:
@@ -98,12 +95,12 @@ To install the required dependencies, you can use:
   component).
 
   OS X comes with all required dependencies except for CMake_, SWIG_,
-  OpenSSL, and CAF. (OpenSSL used to be part of OS X versions 10.10
+  and OpenSSL. (OpenSSL used to be part of OS X versions 10.10
   and older, for which it does not need to be installed manually. It
   was removed in OS X 10.11). Distributions of these dependencies can
   likely be obtained from your preferred Mac OS X package management
   system (e.g. Homebrew_, MacPorts_, or Fink_). Specifically for
-  Homebrew, the ``cmake``, ``swig``, ``openssl`` and ``caf`` packages
+  Homebrew, the ``cmake``, ``swig``, and ``openssl`` packages
   provide the required dependencies.
 
 
@@ -113,6 +110,7 @@ Optional Dependencies
 Bro can make use of some optional libraries and tools if they are found at
 build time:
 
+    * C++ Actor Framework (CAF) version 0.14 (http://actor-framework.org)
     * LibGeoIP (for geolocating IP addresses)
     * sendmail (enables Bro and BroControl to send mail)
     * curl (used by a Bro script that implements active HTTP)