[libc-commits] [libc] [libc] Add atexit to baremetal entrypoints (PR #147290)

[William Huynh via libc-commits]

https://github.com/saturn691 created https://github.com/llvm/llvm-project/pull/147290

Part of #145349. Requires #145358. Required by #146863. Once the mutex has been implemented, we can register functions to be called for exit with `atexit`.

>From 3b5a0e659fe6eafa5c5fcc5f3237113478b99cdd Mon Sep 17 00:00:00 2001
From: William Huynh <William.Huynh at arm.com>
Date: Mon, 7 Jul 2025 13:20:40 +0100
Subject: [PATCH] [libc] Add atexit to baremetal entrypoints

---
 libc/config/baremetal/aarch64/entrypoints.txt | 1 +
 libc/config/baremetal/arm/entrypoints.txt     | 1 +
 libc/config/baremetal/riscv/entrypoints.txt   | 1 +
 3 files changed, 3 insertions(+)

diff --git a/libc/config/baremetal/aarch64/entrypoints.txt b/libc/config/baremetal/aarch64/entrypoints.txt
index a8e653fdd5159..4c1b33a7b1c0e 100644
--- a/libc/config/baremetal/aarch64/entrypoints.txt
+++ b/libc/config/baremetal/aarch64/entrypoints.txt
@@ -218,6 +218,7 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.stdlib.abort
     libc.src.stdlib.abs
     libc.src.stdlib.aligned_alloc
+    libc.src.stdlib.atexit
     libc.src.stdlib.atof
     libc.src.stdlib.atoi
     libc.src.stdlib.atol
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index acafef17fa5d1..61a61f02c2095 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -218,6 +218,7 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.stdlib.abort
     libc.src.stdlib.abs
     libc.src.stdlib.aligned_alloc
+    libc.src.stdlib.atexit
     libc.src.stdlib.atof
     libc.src.stdlib.atoi
     libc.src.stdlib.atol
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index 023826f12d723..758d5fe4c3e21 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -218,6 +218,7 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.stdlib.abort
     libc.src.stdlib.abs
     libc.src.stdlib.aligned_alloc
+    libc.src.stdlib.atexit
     libc.src.stdlib.atof
     libc.src.stdlib.atoi
     libc.src.stdlib.atol