commit 799f330f6de8ff65a7bdf7e0d1b12cd3c10981ba
from: Russ Cox <rsc@swtch.com>
date: Sat May 30 10:36:14 2020 UTC

osxvers: use swvers -productVersion to skip one awk call

Fixes #406. Suggested by nms42.

commit - 01b505613590f3107c4a8849b18da2cbefd98466
commit + 799f330f6de8ff65a7bdf7e0d1b12cd3c10981ba
blob - 4af44da24a4421a9db221ed83eec5a41b46e36eb
blob + 6ebeb11f3716946653f51d01b9ed0e25b8717a92
--- bin/osxvers
+++ bin/osxvers
@@ -3,5 +3,5 @@
 u=`uname`
 case "$u" in
 Darwin)
-	sw_vers | awk '$1 == "ProductVersion:" {print $2}' | awk -F. '{printf("CFLAGS=$CFLAGS -DOSX_VERSION=%d%02d%02d\n", $1, $2, $3)}'
+	sw_vers -productVersion | awk -F. '{printf("CFLAGS=$CFLAGS -DOSX_VERSION=%d%02d%02d\n", $1, $2, $3)}'
 esac