app-backup/btrbk: Fix race condition in install

Closes: https://bugs.gentoo.org/745808
Package-Manager: Portage-3.0.12, Repoman-3.0.2
Signed-off-by: Craig Andrews <candrews@gentoo.org>

app-backup/btrbk/btrbk-0.30.0.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -27,6 +27,10 @@ RDEPEND="dev-lang/perl
 	mbuffer? ( >=sys-block/mbuffer-20180505 )
 	>=sys-fs/btrfs-progs-4.12"
 
+PATCHES=(
+	"${FILESDIR}/${P}-make-install-race.patch"
+)
+
 src_compile() {
 	emake clean
 	use doc && emake -C doc

app-backup/btrbk/files/btrbk-0.30.0-make-install-race.patch

@@ -0,0 +1,27 @@
+https://github.com/digint/btrbk/pull/341
+
+From ec123405669762aefe813801e2c49183800cc3a9 Mon Sep 17 00:00:00 2001
+From: Xiretza <xiretza@xiretza.xyz>
+Date: Mon, 28 Sep 2020 16:49:19 +0200
+Subject: [PATCH] Fix race condition in `make install`
+
+If run with -j, it's possible for install-bin-links to run before
+install-bin and subsequently fail because $(BINDIR) hasn't been created
+yet.
+---
+ Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Makefile b/Makefile
+index 030b577..44ab19f 100644
+--- a/Makefile
++++ b/Makefile
+@@ -54,7 +54,7 @@ install-bin:
+ 	install -d -m 755 "$(DESTDIR)$(BINDIR)"
+ 	install -p -m 755 $(BIN) "$(DESTDIR)$(BINDIR)"
+ 
+-install-bin-links:
++install-bin-links: install-bin
+ 	@echo 'installing symlinks...'
+ 	for name in $(BIN_LINKS); do \
+ 		ln -s -n -f $(BIN) "$(DESTDIR)$(BINDIR)/$$name"; \