From 1b8117be21e6c86511fea1fc553cbda1e20c07cb Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Wed, 9 Aug 2017 19:50:18 -0400
Subject: [PATCH] cmake: Don't link directly against a libpthread on Android
 (thanks, Anthony!).

Android has pthreads, but it's just part of their C runtime instead of a
separate library like the usual Linux platforms.

Fixes Bugzilla #3675.
---
 cmake/sdlchecks.cmake | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/cmake/sdlchecks.cmake b/cmake/sdlchecks.cmake
index 15834f5f8..4ce64c2f7 100644
--- a/cmake/sdlchecks.cmake
+++ b/cmake/sdlchecks.cmake
@@ -856,7 +856,10 @@ endmacro()
 # PTHREAD_LIBS
 macro(CheckPTHREAD)
   if(PTHREADS)
-    if(LINUX)
+    if(ANDROID)
+      # the android libc provides built-in support for pthreads, so no
+      # additional linking or compile flags are necessary
+    elseif(LINUX)
       set(PTHREAD_CFLAGS "-D_REENTRANT")
       set(PTHREAD_LDFLAGS "-pthread")
     elseif(ANDROID)