Don't look for sched_yield on Android.
The problem is that sched_yield is available on the target, but configure.ac is asking to build
a host binary using the AC_SEARCH_LIBS macro. It can't configure for Android, since sched_yield isn't
available on the host.
diff --git a/configure.ac b/configure.ac
index 6e9ce1f..7a5e3ab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -190,7 +190,7 @@
AC_CXX_STL_HASH
case "$target_os" in
- mingw* | cygwin* | win* | aix*)
+ mingw* | cygwin* | win* | aix* | *android* )
;;
*)
# Need to link against rt on Solaris
