[libc-commits] [libc] [libc] add snmalloc as an alternative allocator to libc (PR #122284)

[Matthew Parkinson via libc-commits]

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@@ -0,0 +1,119 @@
+set(SNMALLOC_USE_SELF_VENDORED_STL ON CACHE BOOL "use freestanding snmalloc setup" FORCE)
+set(SNMALLOC_BUILD_TESTING OFF CACHE BOOL "disable snmalloc tests" FORCE)
+set(SNMALLOC_HEADER_ONLY_LIBRARY ON CACHE BOOL "use snmalloc as header only library" FORCE)
+
+# Disable installation
+macro (install)
+endmacro ()
+
+add_subdirectory(${LLVM_LIBC_INCLUDE_SNMALLOC} ${CMAKE_CURRENT_BINARY_DIR}/snmalloc EXCLUDE_FROM_ALL)
+
+target_compile_options(
+  snmalloc 
+  INTERFACE 
+    -ffreestanding
+    -nostdinc 
+    -Wno-newline-eof 
+    -Wno-extra-semi
+    -Wno-unused-command-line-argument
+    -Wno-ctad-maybe-unsupported
+    # TODO: define this
+    -DSTDERR_FILENO=2
+    -DSNMALLOC_USE_PTHREAD_DESTRUCTORS
----------------
mjp41 wrote:

This would remove the need for pthread and atexit for tidying up.
```suggestion
    -DSNMALLOC_USE_THREAD_CLEANUP
```

https://github.com/llvm/llvm-project/pull/122284