[libc-commits] [libc] [libc] rework mutex (PR #92168)

[Nick Desaulniers via libc-commits]

================
@@ -22,12 +22,35 @@ add_header_library(
     libc.src.__support.time.linux.abs_timeout
 )
 
+set(raw_mutex_additional_flags)
+if (LIBC_CONF_TIMEOUT_ENSURE_MONOTONICITY)
+  set(raw_mutex_additional_flags -DLIBC_COPT_TIMEOUT_ENSURE_MONOTONICITY)
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nickdesaulniers wrote:

Is there a way to change the defaults such that if I don't set `-DLIBC_COPT_TIMEOUT_ENSURE_MONOTONICITY` manually, we get monotonicity?

I ask because I'm getting llvm-libc to build for Android, and I can't use cmake there.  So I need to rediscover all of the `-D` flags I need to set for sane defaults, which is annoying.

https://github.com/llvm/llvm-project/pull/92168