From 9a9bcff3e9032965104363d083458312c862b514 Mon Sep 17 00:00:00 2001
From: jelle van der Waa <jelle@vdwaa.nl>
Date: Sat, 7 Sep 2019 20:21:09 +0200
Subject: [PATCH] build: Add EXTRA_LDFLAGS environment variable handling (fixes
 #5999) (#6000)

Allow extending LDFLAGS by setting EXTRA_LDFLAGS to be able to pass
-extldflags=-zrelro -ldflags=-extldflags=-znow for Arch Linux packaging
to get full relro.
---
 build.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/build.go b/build.go
index 5daec2a3c..9c22ac951 100644
--- a/build.go
+++ b/build.go
@@ -801,6 +801,9 @@ func ldflags() string {
 	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.Stamp%c%d", sep, buildStamp())
 	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.User%c%s", sep, buildUser())
 	fmt.Fprintf(b, " -X github.com/syncthing/syncthing/lib/build.Host%c%s", sep, buildHost())
+	if v := os.Getenv("EXTRA_LDFLAGS"); v != "" {
+		fmt.Fprintf(b, " %s", v);
+	}
 	return b.String()
 }