Add an Expect-like tool

This is to provide an Expect utility with a minimal dependency tree
for C-based projects.  It also addresses some Tcl Expect design issues,
as perceived by me.

tools/wdye/CMakeLists.txt

@@ -0,0 +1,39 @@
+cmake_minimum_required (VERSION 3.18)
+project (wdye VERSION 1 DESCRIPTION "What did you expect?" LANGUAGES C)
+
+set (CMAKE_C_STANDARD 99)
+set (CMAKE_C_STANDARD_REQUIRED ON)
+set (CMAKE_C_EXTENSIONS OFF)
+
+# -Wunused-function is pretty annoying here, as everything is static
+set (options -Wall -Wextra -Wno-unused-function)
+add_compile_options ("$<$<CXX_COMPILER_ID:GNU>:${options}>")
+add_compile_options ("$<$<CXX_COMPILER_ID:Clang>:${options}>")
+
+set (CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/../../cmake")
+
+find_package (Curses)
+find_package (PkgConfig REQUIRED)
+pkg_search_module (lua REQUIRED
+	lua53 lua5.3 lua-5.3 lua54 lua5.4 lua-5.4 lua>=5.3)
+
+option (WITH_CURSES "Offer terminal sequences using Curses" "${CURSES_FOUND}")
+
+include_directories ("${PROJECT_BINARY_DIR}")
+file (CONFIGURE OUTPUT "${PROJECT_BINARY_DIR}/config.h" CONTENT [[
+#define PROGRAM_NAME "${PROJECT_NAME}"
+#define PROGRAM_VERSION "${PROJECT_VERSION}"
+#cmakedefine WITH_CURSES
+]])
+
+add_executable (wdye wdye.c)
+target_include_directories (wdye PUBLIC ${lua_INCLUDE_DIRS})
+target_link_directories (wdye PUBLIC ${lua_LIBRARY_DIRS})
+target_link_libraries (wdye PUBLIC ${lua_LIBRARIES})
+if (WITH_CURSES)
+	target_include_directories (wdye PUBLIC ${CURSES_INCLUDE_DIRS})
+	target_link_libraries (wdye PUBLIC ${CURSES_LIBRARIES})
+endif ()
+
+add_test (NAME simple COMMAND wdye "${PROJECT_SOURCE_DIR}/test.lua")
+include (CTest)