From 01eef9f87b72b0c1473672ca17592077b5af1126 Mon Sep 17 00:00:00 2001
From: Silas <silas_git@nocafe.net>
Date: Thu, 12 Nov 2020 08:36:33 -0300
Subject: build: add -D_NETBSD_SOURCE for NetBSD

memrchr() signature is not exposed by default for NetBSD.  If one does
not add -D_NETBSD_SOURCE, the compiler uses its own signature for
memrchr() that returns a 32-bit integer, leading to misbehaviour in some
situations.  Defining _BSD_SOURCE doesn't work, so we define
_NETBSD_SOURCE.
---
 configure | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure b/configure
index 9d5bf0d..4d8f7b1 100755
--- a/configure
+++ b/configure
@@ -227,6 +227,7 @@ OS=$(uname)
 
 case "$OS" in
 FreeBSD|DragonFly) CFLAGS_STD="$CFLAGS_STD -D_BSD_SOURCE -D__BSD_VISIBLE=1" ;;
+NetBSD)  CFLAGS_STD="$CFLAGS_STD -D_NETBSD_SOURCE" ;;
 *BSD)    CFLAGS_STD="$CFLAGS_STD -D_BSD_SOURCE" ;;
 Darwin)  CFLAGS_STD="$CFLAGS_STD -D_DARWIN_C_SOURCE" ;;
 AIX)     CFLAGS_STD="$CFLAGS_STD -D_ALL_SOURCE" ;;
-- 
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