diff --git a/.cirrus.yml b/.cirrus.yml
index 38e1451..40b335d 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -5,8 +5,9 @@
     memory: 16
     dockerfile: .cirrus/Dockerfile.ubuntu16.04
 
-  build_script: mkdir build && cd build && cmake .. -DARCH=all -DTRELLIS_ROOT=/usr/local/src/prjtrellis -DBUILD_TESTS=on && make -j $(nproc)
+  build_script: mkdir build && cd build && cmake .. -DARCH=all -DTRELLIS_ROOT=/usr/local/src/prjtrellis -DTORC_ROOT=/usr/local/src/torc -DBUILD_TESTS=on && make -j $(nproc)
   test_generic_script: cd build && ./nextpnr-generic-test
   test_ice40_script: cd build && ./nextpnr-ice40-test
   smoketest_ice40_script: export NEXTPNR=$(pwd)/build/nextpnr-ice40 && cd ice40/smoketest/attosoc && ./smoketest.sh
-  test_ecp5_script: cd build && ./nextpnr-ecp5-test
\ No newline at end of file
+  test_ecp5_script: cd build && ./nextpnr-ecp5-test
+  test_xc7_script: cd build && ./nextpnr-xc7-test
diff --git a/.cirrus/Dockerfile.ubuntu16.04 b/.cirrus/Dockerfile.ubuntu16.04
index 71a634b..cf665c5 100644
--- a/.cirrus/Dockerfile.ubuntu16.04
+++ b/.cirrus/Dockerfile.ubuntu16.04
@@ -52,4 +52,10 @@
     make -j $(nproc) ;\
     make install
 
-
+RUN set -e -x ;\
+    mkdir -p /usr/local/src ;\
+    cd /usr/local/src ;\
+    git clone --recursive https://github.com/eddiehung/torc.git ;\
+    cd torc ;\
+    git reset --hard 90874d1293fbeba77bae41b5c38168cd91e1bf00 ;\
+    make -j $(nproc) -C src/torc
diff --git a/gui/xc7/family.cmake b/gui/xc7/family.cmake
index 3b010c7..e69de29 100644
--- a/gui/xc7/family.cmake
+++ b/gui/xc7/family.cmake
@@ -1 +0,0 @@
-include_directories(/opt/torc/src)
\ No newline at end of file
diff --git a/torc b/torc
index a5a4ec0..90874d1 160000
--- a/torc
+++ b/torc
@@ -1 +1 @@
-Subproject commit a5a4ec057eae3ed07ed2acb9da13404808e37211
+Subproject commit 90874d1293fbeba77bae41b5c38168cd91e1bf00
diff --git a/xc7/arch.cc b/xc7/arch.cc
index 90f8d82..2304cd7 100644
--- a/xc7/arch.cc
+++ b/xc7/arch.cc
@@ -349,7 +349,9 @@
 
 Arch::Arch(ArchArgs args) : args(args)
 {
-    torc::common::DirectoryTree directoryTree("/opt/torc/src/torc");
+    std::stringstream ss;
+    ss << TORC_ROOT << "/src/torc";
+    torc::common::DirectoryTree directoryTree(ss.str().c_str());
     if (args.type == ArchArgs::Z020) {
         torc_info = std::unique_ptr<TorcInfo>(new TorcInfo(this, "xc7z020", args.package));
     } else if (args.type == ArchArgs::VX980) {
@@ -358,8 +360,10 @@
         log_error("Unsupported XC7 chip type.\n");
     }
 
-        width = torc_info->width;
-        height = torc_info->height;
+    // TODO: FIXME
+    width = torc_info->width;
+    height = torc_info->height;
+
     /*if (getCtx()->verbose)*/ {
         log_info("Number of bels:  %d\n", torc_info->num_bels);
         log_info("Number of wires: %d\n", torc_info->num_wires);
@@ -442,6 +446,8 @@
 BelRange Arch::getBelsByTile(int x, int y) const
 {
     BelRange br;
+    br.b.cursor = 0;
+    br.e.cursor = 0;
     NPNR_ASSERT("TODO");
     return br;
 }
diff --git a/xc7/family.cmake b/xc7/family.cmake
index 9de869e..e0a93bf 100644
--- a/xc7/family.cmake
+++ b/xc7/family.cmake
@@ -1,73 +1,108 @@
-add_dependencies(nextpnr-${family} torc)
-add_custom_target(torc ALL
-                  COMMAND $(MAKE) > /dev/null 2> /dev/null
-                  COMMENT "Building torc (may take some time...)"
-                  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/torc/src)
-find_package(Boost REQUIRED COMPONENTS serialization iostreams ${boost_libs} ${boost_python_lib})
+if (NOT DEFINED TORC_ROOT)
+    # Adapted from https://cliutils.gitlab.io/modern-cmake/chapters/projects/submodule.html
+    find_package(Git QUIET)
+    if(GIT_FOUND AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.gitmodules")
+    # Update submodules as needed
+        option(GIT_SUBMODULE "Check submodules during build" ON)
+        if(GIT_SUBMODULE)
+            message(STATUS "Submodule update")
+            execute_process(COMMAND ${GIT_EXECUTABLE} submodule update --init --recursive
+                            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+                            RESULT_VARIABLE GIT_SUBMOD_RESULT)
+            if(NOT GIT_SUBMOD_RESULT EQUAL "0")
+                message(FATAL_ERROR "git submodule update --init failed with ${GIT_SUBMOD_RESULT}, please checkout submodules")
+            endif()
+        endif()
+    endif()
 
-include_directories(torc/src)
-target_link_libraries(
-    nextpnr-${family} PRIVATE
+    add_dependencies(nextpnr-${family} torc)
+    if (BUILD_TESTS)
+        add_dependencies(nextpnr-${family}-test torc)
+    endif()
+    add_custom_target(torc ALL
+                      COMMAND $(MAKE) > /dev/null 2> /dev/null
+                      COMMENT "Building torc (may take some time...)"
+                      WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/torc/src)
+    set(TORC_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/torc)
+endif()
 
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/Arc.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/ArcUsage.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/Array.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/DDB.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/DDBConsoleStreams.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/DDBStreamHelper.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/DigestStream.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/ExtendedWireInfo.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/InstancePin.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/OutputStreamHelpers.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/Package.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/Pad.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/PrimitiveConn.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/PrimitiveDef.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/PrimitiveElement.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/PrimitiveElementPin.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/PrimitivePin.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/Segments.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/Site.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/Sites.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/Tiles.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/TileInfo.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/Tilewire.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/Versions.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/VprExporter.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/WireInfo.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/WireUsage.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/XdlImporter.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/architecture/XilinxDatabaseTypes.o
+find_package(Boost REQUIRED COMPONENTS regex ${boost_libs} ${boost_python_lib})
 
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/common/Annotated.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/common/DeviceDesignator.o
-	${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/common/Devices.o
-	${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/common/DirectoryTree.o
-	${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/common/DottedVersion.o
-	${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/common/NullOutputStream.o
+target_compile_definitions(nextpnr-${family} PRIVATE -DTORC_ROOT="${TORC_ROOT}")
+target_include_directories(nextpnr-${family} PUBLIC ${TORC_ROOT}/src)
+if (BUILD_TESTS)
+    target_compile_definitions(nextpnr-${family}-test PRIVATE -DTORC_ROOT="${TORC_ROOT}")
+    target_include_directories(nextpnr-${family}-test PUBLIC ${TORC_ROOT}/src)
+endif()
+if (BUILD_GUI)
+    target_include_directories(gui_${family} PUBLIC ${TORC_ROOT}/src)
+endif()
 
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/externals/zlib/zfstream.o
+set(TORC_OBJS
+    ${TORC_ROOT}/src/torc/architecture/Arc.o
+    ${TORC_ROOT}/src/torc/architecture/ArcUsage.o
+    ${TORC_ROOT}/src/torc/architecture/Array.o
+    ${TORC_ROOT}/src/torc/architecture/DDB.o
+    ${TORC_ROOT}/src/torc/architecture/DDBConsoleStreams.o
+    ${TORC_ROOT}/src/torc/architecture/DDBStreamHelper.o
+    ${TORC_ROOT}/src/torc/architecture/DigestStream.o
+    ${TORC_ROOT}/src/torc/architecture/ExtendedWireInfo.o
+    ${TORC_ROOT}/src/torc/architecture/InstancePin.o
+    ${TORC_ROOT}/src/torc/architecture/OutputStreamHelpers.o
+    ${TORC_ROOT}/src/torc/architecture/Package.o
+    ${TORC_ROOT}/src/torc/architecture/Pad.o
+    ${TORC_ROOT}/src/torc/architecture/PrimitiveConn.o
+    ${TORC_ROOT}/src/torc/architecture/PrimitiveDef.o
+    ${TORC_ROOT}/src/torc/architecture/PrimitiveElement.o
+    ${TORC_ROOT}/src/torc/architecture/PrimitiveElementPin.o
+    ${TORC_ROOT}/src/torc/architecture/PrimitivePin.o
+    ${TORC_ROOT}/src/torc/architecture/Segments.o
+    ${TORC_ROOT}/src/torc/architecture/Site.o
+    ${TORC_ROOT}/src/torc/architecture/Sites.o
+    ${TORC_ROOT}/src/torc/architecture/Tiles.o
+    ${TORC_ROOT}/src/torc/architecture/TileInfo.o
+    ${TORC_ROOT}/src/torc/architecture/Tilewire.o
+    ${TORC_ROOT}/src/torc/architecture/Versions.o
+    ${TORC_ROOT}/src/torc/architecture/VprExporter.o
+    ${TORC_ROOT}/src/torc/architecture/WireInfo.o
+    ${TORC_ROOT}/src/torc/architecture/WireUsage.o
+    ${TORC_ROOT}/src/torc/architecture/XdlImporter.o
+    ${TORC_ROOT}/src/torc/architecture/XilinxDatabaseTypes.o
+
+    ${TORC_ROOT}/src/torc/common/Annotated.o
+    ${TORC_ROOT}/src/torc/common/DeviceDesignator.o
+	${TORC_ROOT}/src/torc/common/Devices.o
+	${TORC_ROOT}/src/torc/common/DirectoryTree.o
+	${TORC_ROOT}/src/torc/common/DottedVersion.o
+	${TORC_ROOT}/src/torc/common/NullOutputStream.o
+
+    ${TORC_ROOT}/src/torc/externals/zlib/zfstream.o
     z
 
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Circuit.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/ConfigMap.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Config.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Design.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Factory.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Instance.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/InstancePin.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/InstanceReference.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Module.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/ModuleTransformer.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Named.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Net.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/OutputStreamHelpers.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Pip.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Port.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Progenitor.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Progeny.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Renamable.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/Routethrough.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/TilewirePlaceholder.o
-    ${CMAKE_CURRENT_SOURCE_DIR}/torc/src/torc/physical/XdlExporter.o
+    ${TORC_ROOT}/src/torc/physical/Circuit.o
+    ${TORC_ROOT}/src/torc/physical/ConfigMap.o
+    ${TORC_ROOT}/src/torc/physical/Config.o
+    ${TORC_ROOT}/src/torc/physical/Design.o
+    ${TORC_ROOT}/src/torc/physical/Factory.o
+    ${TORC_ROOT}/src/torc/physical/Instance.o
+    ${TORC_ROOT}/src/torc/physical/InstancePin.o
+    ${TORC_ROOT}/src/torc/physical/InstanceReference.o
+    ${TORC_ROOT}/src/torc/physical/Module.o
+    ${TORC_ROOT}/src/torc/physical/ModuleTransformer.o
+    ${TORC_ROOT}/src/torc/physical/Named.o
+    ${TORC_ROOT}/src/torc/physical/Net.o
+    ${TORC_ROOT}/src/torc/physical/OutputStreamHelpers.o
+    ${TORC_ROOT}/src/torc/physical/Pip.o
+    ${TORC_ROOT}/src/torc/physical/Port.o
+    ${TORC_ROOT}/src/torc/physical/Progenitor.o
+    ${TORC_ROOT}/src/torc/physical/Progeny.o
+    ${TORC_ROOT}/src/torc/physical/Renamable.o
+    ${TORC_ROOT}/src/torc/physical/Routethrough.o
+    ${TORC_ROOT}/src/torc/physical/TilewirePlaceholder.o
+    ${TORC_ROOT}/src/torc/physical/XdlExporter.o
 )
+
+target_link_libraries(nextpnr-${family} PRIVATE ${TORC_OBJS})
+if (BUILD_TESTS)
+    target_link_libraries(nextpnr-${family}-test PRIVATE ${TORC_OBJS})
+endif()