CMake build infrastructure II (#53)

* CMake build infrastructure

The squashed commit that builds and packages releases for the SIMH
simulator suite with CMake, version 3.14 or newer.

See README-CMake.md for documentation.

PDQ-3/CMakeLists.txt

@@ -0,0 +1,29 @@
+## PDQ-3 simulator
+##
+## This is an automagically generated file. Do NOT EDIT.
+## Any changes you make will be overwritten!!
+##
+## Make changes to the SIMH top-level makefile and then run the
+## "cmake/generate.py" script to regenerate these files.
+##
+##     cd cmake; python -m generate --help
+##
+## ------------------------------------------------------------
+
+if (HAVE_UNITY_FRAMEWORK AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/unit-tests/CMakeLists.txt")
+  add_subdirectory(unit-tests)
+endif ()
+
+add_simulator(pdq3
+    SOURCES
+        pdq3_cpu.c
+        pdq3_sys.c
+        pdq3_stddev.c
+        pdq3_mem.c
+        pdq3_debug.c
+        pdq3_fdc.c
+    INCLUDES
+        ${CMAKE_CURRENT_SOURCE_DIR}
+    LABEL PDQ-3
+    PKG_FAMILY experimental
+    TEST pdq3)