Introduce tenyr language support to CMake

Adapted from https://stackoverflow.com/a/38296922

Author: kulp

cmake/CMakeDetermineTENYRCompiler.cmake

@@ -0,0 +1,31 @@
+# For now we are configuring ctest into a subdirectory of the build directory
+# that is chosen by the top-level Makefile. Eventually CMake will control the
+# build directory location and this TENYR_LEGACY_BUILD_DIR will go away.
+set(TENYR_LEGACY_BUILD_DIR "${CMAKE_BINARY_DIR}/..")
+
+# Find the compiler
+find_program(
+    CMAKE_TENYR_COMPILER
+        NAMES "tas"
+        PATHS "${TENYR_LEGACY_BUILD_DIR}"
+        DOC "tenyr assembler"
+        NO_DEFAULT_PATH
+)
+mark_as_advanced(CMAKE_TENYR_COMPILER)
+
+find_program(
+    CMAKE_TENYR_LINKER
+        NAMES "tld"
+        PATHS "${TENYR_LEGACY_BUILD_DIR}"
+        DOC "tenyr linker"
+        NO_DEFAULT_PATH
+)
+mark_as_advanced(CMAKE_TENYR_LINKER)
+
+set(CMAKE_TENYR_SOURCE_FILE_EXTENSIONS tas)
+set(CMAKE_TENYR_OUTPUT_EXTENSION .to)
+set(CMAKE_TENYR_COMPILER_ENV_VAR "TENYR_AS")
+
+# Configure variables set in this file for fast reload later on
+configure_file(${CMAKE_CURRENT_LIST_DIR}/CMakeTENYRCompiler.cmake.in
+               ${CMAKE_PLATFORM_INFO_DIR}/CMakeTENYRCompiler.cmake)

cmake/CMakeTENYRCompiler.cmake.in

@@ -0,0 +1,6 @@
+set(CMAKE_TENYR_COMPILER "@CMAKE_TENYR_COMPILER@")
+set(CMAKE_TENYR_LINKER "@CMAKE_TENYR_LINKER@")
+set(CMAKE_TENYR_COMPILER_LOADED 1)
+set(CMAKE_TENYR_SOURCE_FILE_EXTENSIONS @CMAKE_TENYR_SOURCE_FILE_EXTENSIONS@)
+set(CMAKE_TENYR_OUTPUT_EXTENSION @CMAKE_TENYR_OUTPUT_EXTENSION@)
+set(CMAKE_TENYR_COMPILER_ENV_VAR "@CMAKE_TENYR_COMPILER_ENV_VAR@")

cmake/CMakeTENYRInformation.cmake

@@ -0,0 +1,6 @@
+set(CMAKE_TENYR_COMPILE_OBJECT "<CMAKE_TENYR_COMPILER> <SOURCE> -o <OBJECT>")
+# CMake wants to call a compiler front-end (CMAKE_TENYR_COMPILER) for linking,
+# but we need a separate linker. For now, we interpolate the CMAKE_TENYR_LINKER
+# directly into the string below.
+set(CMAKE_TENYR_LINK_EXECUTABLE "${CMAKE_TENYR_LINKER} <OBJECTS> -o <TARGET>")
+set(CMAKE_TENYR_INFORMATION_LOADED 1)

cmake/CMakeTestTENYRCompiler.cmake

@@ -0,0 +1,2 @@
+# For now just do nothing in here
+set(CMAKE_TENYR_COMPILER_WORKS 1 CACHE INTERNAL "")