Add ktx

ktx/cmake/linux-x86_64-toolchain.cmake

@@ -0,0 +1,48 @@
+# Copyright 2023 The Khronos Group Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+# CMake Toolchain file for cross-compiling to x86_64 (amd64) on
+# a non-x86_64 device running Linux (Ubuntu).
+#
+# The following packages must be installed for compiling to x86_64.
+#   sudo apt-get -qq install gcc-x86-64-linux-gnu g++-x86-64-linux-gnu binutils-x86-64-linux-gnu
+
+######################################################################
+# Nota Bene
+#
+# Untested. Was under development when Travis-CI made arm64 Ubuntu
+# runners available rendering it unneeded. Kept here to preserve the
+# learning and in case it becomes useful.
+######################################################################
+
+# A note about the platform/architecture naming.
+#
+# The Ubuntu/Deb packages with the compiler and tools use "x64-64" as
+# you can see above. The compiler and tools are named with "x86_64"
+# as you will see in the macro settings below. Probably this is done
+# to maintain consistency with existing naming conventions for
+# packages (no underscores) and tools (use the offical architecture
+# name).
+
+# Target operating system name.
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR x86_64)
+
+# Name of C compiler.
+set(CMAKE_C_COMPILER "/usr/bin/x86_64-linux-gnu-gcc")
+set(CMAKE_CXX_COMPILER "/usr/bin/x86_64-linux-gnu-g++")
+
+# Where to look for the target environment. (More paths can be added here)
+set(CMAKE_FIND_ROOT_PATH /usr/x86_64-linux-gnu)
+#set(CMAKE_SYSROOT /usr/x86_64-linux-gnu)
+
+# Adjust the default behavior of the FIND_XXX() commands:
+# search programs in the host environment only.
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+
+# Search headers and libraries in the target environment only.
+#set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+#set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+#set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+
+set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE amd64)