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Markus Böck 6359049c35 [CMake][runtimes] Add file level dependency to merge_archives commands

Both libc++ and libc++abi have options of merging with another archive. In the case of libc++abi, libunwind can be merged into it and in the case of libc++, libc++abi can be merged into it.

This is realized using add_custom_command with POST_BUILD and the usage of the CMake generator expression TARGET_LINKER_FILE in the arguments. For such generator expressions CMake doc states: "This target-level dependency does NOT add a file-level dependency that would cause the custom command to re-run whenever the executable is recompiled" [1]

This patch adds a DEPENDS argument to both add_custom_command invocations so that the archives also have a file-level dependency on the target they are merging with. That way, changes in say, libunwind source code, will be updated in the libc++abi and/or libc++ static libraries as well.

[1] https://cmake.org/cmake/help/v3.20/command/add_custom_command.html

Differential Revision: https://reviews.llvm.org/D98129

2021-03-18 18:51:10 +01:00

benchmarks

Revert "[libc++] Require C++20 to build the benchmarks."

2021-02-09 19:59:34 +01:00

cmake

[libcxx] Move Linaro 32 bit armv bots to buildkite

2021-03-12 09:47:07 +00:00

docs

[libcxx] [docs] Fix formatting of inline verbatim snippets in the Windows section

2021-03-17 11:41:45 +02:00

include

[libcxx] updates the feature-test macro generator