1 files changed, 114 insertions, 0 deletions
diff --git a/cmake/Modules/GrComponent.cmake b/cmake/Modules/GrComponent.cmake
new file mode 100644
index 000000000..d45b8003c
--- /dev/null
+++ b/cmake/Modules/GrComponent.cmake
@@ -0,0 +1,114 @@
+# Copyright 2010-2011 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+if(DEFINED __INCLUDED_GR_COMPONENT_CMAKE)
+    return()
+endif()
+set(__INCLUDED_GR_COMPONENT_CMAKE TRUE)
+
+set(_gr_enabled_components "" CACHE INTERNAL "" FORCE)
+set(_gr_disabled_components "" CACHE INTERNAL "" FORCE)
+
+if(NOT DEFINED ENABLE_DEFAULT)
+    set(ENABLE_DEFAULT ON)
+    message(STATUS "")
+    message(STATUS "The build system will automatically enable all components.")
+    message(STATUS "Use -DENABLE_DEFAULT=OFF to disable components by default.")
+endif()
+
+########################################################################
+# Register a component into the system
+# - name: canonical component name
+# - var: variable for enabled status
+# - argn: list of dependencies
+########################################################################
+function(GR_REGISTER_COMPONENT name var)
+    include(CMakeDependentOption)
+    message(STATUS "")
+    message(STATUS "Configuring ${name} support...")
+    foreach(dep ${ARGN})
+        message(STATUS "  Dependency ${dep} = ${${dep}}")
+    endforeach(dep)
+
+    #if the user set the var to force, we note this
+    if("${${var}}" STREQUAL "FORCE")
+        set(${var} ON)
+        set(var_force TRUE)
+    else()
+        set(var_force FALSE)
+    endif()
+
+    #rewrite the dependency list so that deps that are also components use the cached version
+    unset(comp_deps)
+    foreach(dep ${ARGN})
+        list(FIND _gr_enabled_components ${dep} dep_enb_index)
+        list(FIND _gr_disabled_components ${dep} dep_dis_index)
+        if (${dep_enb_index} EQUAL -1 AND ${dep_dis_index} EQUAL -1)
+            list(APPEND comp_deps ${dep})
+        else()
+            list(APPEND comp_deps ${dep}_cached) #is a component, use cached version
+        endif()
+    endforeach(dep)
+
+    #setup the dependent option for this component
+    CMAKE_DEPENDENT_OPTION(${var} "enable ${name} support" ${ENABLE_DEFAULT} "${comp_deps}" OFF)
+    set(${var}_cached "${${var}}" CACHE INTERNAL "" FORCE)
+
+    #force was specified, but the dependencies were not met
+    if(NOT ${var} AND var_force)
+        message(FATAL_ERROR "user force-enabled ${name} but configuration checked failed")
+    endif()
+
+    #append the component into one of the lists
+    if(${var})
+        message(STATUS "  Enabling ${name} support.")
+        list(APPEND _gr_enabled_components ${name})
+    else(${var})
+        message(STATUS "  Disabling ${name} support.")
+        list(APPEND _gr_disabled_components ${name})
+    endif(${var})
+    message(STATUS "  Override with -D${var}=ON/OFF")
+
+    #make components lists into global variables
+    set(_gr_enabled_components ${_gr_enabled_components} CACHE INTERNAL "" FORCE)
+    set(_gr_disabled_components ${_gr_disabled_components} CACHE INTERNAL "" FORCE)
+endfunction(GR_REGISTER_COMPONENT)
+
+########################################################################
+# Print the registered component summary
+########################################################################
+function(GR_PRINT_COMPONENT_SUMMARY)
+    message(STATUS "")
+    message(STATUS "######################################################")
+    message(STATUS "# Gnuradio enabled components                         ")
+    message(STATUS "######################################################")
+    foreach(comp ${_gr_enabled_components})
+        message(STATUS "  * ${comp}")
+    endforeach(comp)
+
+    message(STATUS "")
+    message(STATUS "######################################################")
+    message(STATUS "# Gnuradio disabled components                        ")
+    message(STATUS "######################################################")
+    foreach(comp ${_gr_disabled_components})
+        message(STATUS "  * ${comp}")
+    endforeach(comp)
+
+    message(STATUS "")
+endfunction(GR_PRINT_COMPONENT_SUMMARY)