Take a quick_exit() patch from upstream FreeBSD.
r325389 | kib | 2017-11-04 03:52:58 -0700 (Sat, 04 Nov 2017) | 7 lines
C++17 requires quick_exit(3) to be async-signal safe.
Make it safe, and update man page with the useful information.
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Test: treehugger
Change-Id: Idf84b1f1e360c031b0e39d5f6e80d17308db1940
diff --git a/libc/upstream-freebsd/android/include/freebsd-compat.h b/libc/upstream-freebsd/android/include/freebsd-compat.h
index 6f7a3f0..3228701 100644
--- a/libc/upstream-freebsd/android/include/freebsd-compat.h
+++ b/libc/upstream-freebsd/android/include/freebsd-compat.h
@@ -47,4 +47,6 @@
/* FreeBSD has this, but we can't really implement it correctly on Linux. */
#define issetugid() 0
+#define __compiler_membar() __asm __volatile(" " : : : "memory")
+
#endif
diff --git a/libc/upstream-freebsd/android/include/machine/atomic.h b/libc/upstream-freebsd/android/include/machine/atomic.h
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/libc/upstream-freebsd/android/include/machine/atomic.h