fix support for building libevent on other systems

.github/workflows/build.yml

@@ -56,7 +56,6 @@ jobs:
       run: |
         tar xf ${{ steps.libevent.outputs.filepath }}
         move libevent-2.0.22-stable event
-        xcopy /E event\WIN32-Code event\include
 
     - name: Download freetype
       id: freetype

gframe/premake5.lua

@@ -15,6 +15,7 @@ project "YGOPro"
     else
         includedirs { EVENT_INCLUDE_DIR }
         libdirs { EVENT_LIB_DIR }
+        links { "event_pthreads" }
     end
 
     if BUILD_IRRLICHT then
@@ -81,7 +82,7 @@ project "YGOPro"
             end
         end
     filter "not system:windows"
-        links { "event_pthreads", "dl", "pthread" }
+        links { "dl", "pthread" }
     filter "system:macosx"
         links { "z" }
         defines { "GL_SILENCE_DEPRECATION" }

premake/event/premake5.lua

@@ -8,7 +8,17 @@ project "event"
             "evmap.c", "log.c", "evutil.c", "evutil_rand.c", "strlcpy.c", "signal.c", 
             "event_tagging.c", "http.c", "evdns.c", "evrpc.c" }
 
+    if os.isfile("evutil_time.c") then
+        files { "evutil_time.c" }
+    end
+
     filter "system:windows"
         prebuildcommands { "xcopy /E /Y $(ProjectDir)..\\event\\WIN32-Code $(ProjectDir)..\\event\\include" }
         files { "win32select.c", "evthread_win32.c", "buffer_iocp.c", "event_iocp.c", "bufferevent_async.c" }
         defines { "WIN32" } -- quirk of old libevent
+
+    filter "system:linux"
+        files { "evthread_pthread.c", "epoll.c", "epoll_sub.c", "poll.c", "select.c" }
+
+    filter "system:macosx"
+        files { "evthread_pthread.c", "kqueue.c", "poll.c", "select.c" }

premake5.lua

@@ -91,7 +91,7 @@ if not BUILD_LUA then
 end
 
 if GetParam("build-event") then
-    BUILD_EVENT = os.istarget("windows") -- only on windows for now
+    BUILD_EVENT = true
 elseif GetParam("no-build-event") then
     BUILD_EVENT = false
 end