Subject: [bug#42457] [PATCH] gnu: knights: Fix build.

From: Jesse Gibbons <[email-masked]>
Date: Tue, 21 Jul 2020 00:11:05 -0600

* gnu/packages/games.scm (knights):
[make-flags] add "CXXFLAGS=-lpthread"
---
gnu/packages/games.scm | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/games.scm b/gnu/packages/games.scm
index cff1c0af99..dc0511e55a 100644
--- a/gnu/packages/games.scm
+++ b/gnu/packages/games.scm
@@ -1366,7 +1366,8 @@ built-in level editor.")
(build-system gnu-build-system)
(arguments
'(#:make-flags
- (list (string-append "PREFIX=" (assoc-ref %outputs "out")))
+ (list (string-append "PREFIX=" (assoc-ref %outputs "out"))
+ "CXXFLAGS=-lpthread")
#:phases
(modify-phases %standard-phases
;; No configure script.