[libcxx-commits] [libcxx] [libcxxabi] [libc++] Introduce the notion of a minimum header version (PR #166074)

[Louis Dionne via libcxx-commits]

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@@ -218,6 +218,9 @@ set(LIBCXX_ABI_NAMESPACE "__${LIBCXX_ABI_VERSION}" CACHE STRING "The inline ABI
 if (NOT LIBCXX_ABI_NAMESPACE MATCHES "__.*")
   message(FATAL_ERROR "LIBCXX_ABI_NAMESPACE must be a reserved identifier, got '${LIBCXX_ABI_NAMESPACE}'.")
 endif()
+set(LIBCXX_AVAILABILITY_MINIMUM_HEADER_VERSION "1" CACHE STRING
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ldionne wrote:

Is there a way that we can embed the version of libc++ that a program was built with into that program? I'm pretty sure it's possible to do that on some platforms with linker tricks. I think that would be useful.

https://github.com/llvm/llvm-project/pull/166074