From e0c4896ed41faa71445d9e0b1751aba5157343c9 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@swtch.com>
Date: Wed, 8 Jan 2020 22:28:44 -0500
Subject: lib9: make a p9frexp function wrapping system frexp

Under certain conditions it looks like frexp gets #defined
to something else on macOS during system headers,
which then breaks the declaration in libc.h.
---
 src/lib9/frexp.c | 9 +++++++++
 src/lib9/mkfile  | 1 +
 2 files changed, 10 insertions(+)
 create mode 100644 src/lib9/frexp.c

(limited to 'src/lib9')

diff --git a/src/lib9/frexp.c b/src/lib9/frexp.c
new file mode 100644
index 00000000..fe3e2f73
--- /dev/null
+++ b/src/lib9/frexp.c
@@ -0,0 +1,9 @@
+#include <u.h>
+#define NOPLAN9DEFINES
+#include <libc.h>
+
+double
+p9frexp(double d, int *i)
+{
+	return frexp(d, i);
+}
diff --git a/src/lib9/mkfile b/src/lib9/mkfile
index 943b597b..7c37de42 100644
--- a/src/lib9/mkfile
+++ b/src/lib9/mkfile
@@ -22,6 +22,7 @@ FMTOFILES=\
 	fmtstr.$O\
 	fmtvprint.$O\
 	fprint.$O\
+	frexp.$O\
 	nan64.$O\
 	print.$O\
 	runefmtstr.$O\
-- 
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