Make it clearer that math.h isn't fdlibm.
It was originally based on fdlibm, but it's been through two different
projects since then, and `git blame` shows basically nothing remaining
from those days. Seems worth leaving something to explain the unusual
copyright header though!
Test: treehugger
Change-Id: I8e7252a755704b866e7f36c8e97adc021fa3cdad
diff --git a/libc/include/math.h b/libc/include/math.h
index 7efc83a..8c084b2 100644
--- a/libc/include/math.h
+++ b/libc/include/math.h
@@ -10,12 +10,10 @@
*/
/*
- * from: @(#)fdlibm.h 5.1 93/09/24
- * $FreeBSD$
+ * Originally based on fdlibm.h 5.1 via FreeBSD.
*/
-#ifndef _MATH_H_
-#define _MATH_H_
+#pragma once
#include <sys/cdefs.h>
#include <limits.h>
@@ -408,5 +406,3 @@
#endif
__END_DECLS
-
-#endif