Vulkan 1.2.173 Comes With New Extensions For Google's Fuchsia
Vulkan 1.2.173 does come with a number of bug fixes for issues brought up by the community as well as internally. Most notable though are two new extensions introduced for Google's Fuchsia platform.
VK_FUCHSIA_external_memory is one of those new extensions from Google and is for exporting/importing device memory handles on Fuchsia. This is similar to the Vulkan external memory extension coverage on other platforms.
VK_FUCHSIA_external_semaphore is also introduced by Vulkan 1.2.173. The VK_FUCHSIA_external_semaphore is for synchronizing access to the external memory using semaphores. Again, nothing unusual and goes along with the prior extension for supporting external memory under Fuchsia.
The latest Vulkan 1.2.173 changes are outlined on GitHub.
Google's Fuchsia operating system continues to be speculated about as the possible future base for Chrome OS and Android.