Use Platforms to manage the toolchains

[narendasan]

We should move to using platforms (https://docs.bazel.build/versions/master/platforms.html) and toolchains (https://docs.bazel.build/versions/master/toolchains.html) as soon as the rules are stable so that we can version the toolchains between PDK versions. A hacky version of this is already in for linux. Should also address #14

[ZhenshengLee]

Currently, the toolchains is already being used to cross-compile for different target arch and sdk.

But the platforms has not already being used because I just see codes which are commented.

DL4AGX/toolchains/BUILD

Lines 20 to 46 in 3dad2b9

	# constaint_setting(name = "gcc_version")
	# constraint_value(
	# name = "gcc_5.4",
	# constaint_setting = ":gcc_version"
	# )
	# constraint_value(
	# name = "gcc_7.4",
	# constaint_setting = ":gcc_version"
	# )
	# constaint_setting(name = "qnx_version")
	# constraint_value(
	# name = "qnx_7.0.0",
	# constaint_setting = ":qnx_version"
	# )
	# platform(
	# name = "drive_pdk_5.1.3.0+linux",
	# constaint_values = {
	# "@platforms//os:linux",
	# "@platforms//cpu:aarch64",
	# ":gcc_5.4",
	# ],
	# )

@narendasan would you give this project any updates?

[chengzhe-xu]

Close this issue since the topic is no longer relevant. Feel free to re-open it if you still need help!