From 69f3ceb90300b531b7ad1754356aeb6b21994c5b Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 28 Mar 2018 09:47:16 +0530
Subject: [PATCH] Merge glfw upstream changes to build on Wayland on FreeBSD

---
 glfw/glfw.py          | 33 +++++++++++++++++++++++++++++----
 glfw/source-info.json |  8 ++++----
 glfw/wl_init.c        |  4 ++++
 glfw/wl_platform.h    |  4 ++++
 4 files changed, 41 insertions(+), 8 deletions(-)

diff --git a/glfw/glfw.py b/glfw/glfw.py
index 567d7895a..e6460fa5b 100755
--- a/glfw/glfw.py
+++ b/glfw/glfw.py
@@ -10,6 +10,10 @@ import sys
 
 _plat = sys.platform.lower()
 is_macos = 'darwin' in _plat
+is_freebsd = 'freebsd' in _plat
+is_netbsd = 'netbsd' in _plat
+is_dragonflybsd = 'dragonfly' in _plat
+is_bsd = is_freebsd or is_netbsd or is_dragonflybsd
 base = os.path.dirname(os.path.abspath(__file__))
 
 
@@ -18,6 +22,20 @@ def wayland_protocol_file_name(base, ext='c'):
     return 'wayland-{}-client-protocol.{}'.format(base, ext)
 
 
+def find_epoll_shim():
+    cflags, ldflags, libs = [], [], []
+    for candidate in '/usr/local/include/libepoll-shim /usr/include/libepoll-shim /usr/local/include /usr/include'.split():
+        if os.path.exists(os.path.join(candidate, 'sys/timerfd.h')):
+            cflags.append('-I' + candidate)
+            break
+    for candidate in '/usr/local/lib /usr/lib'.split():
+        if os.path.exists(os.path.join(candidate, 'libepoll-shim.so')):
+            ldflags.append('-L' + candidate)
+            libs.append('-lepoll-shim')
+            break
+    return cflags, ldflags, libs
+
+
 def init_env(env, pkg_config, at_least_version, module='x11'):
     ans = env.copy()
     ans.cflags = [
@@ -59,6 +77,12 @@ def init_env(env, pkg_config, at_least_version, module='x11'):
         for p in ans.wayland_protocols:
             ans.sources.append(wayland_protocol_file_name(p))
             ans.all_headers.append(wayland_protocol_file_name(p, 'h'))
+        if is_bsd:
+            epoll_cflags, epoll_libdirs, epoll_libs = find_epoll_shim()
+            if not epoll_cflags + epoll_libdirs:
+                raise Exception('Failed to find the epoll-shim package, needed to build the GLFW Wayland backend')
+            ans.cflags.extend(epoll_cflags)
+            ans.ldpaths.extend(epoll_libdirs + epoll_libs)
         for dep in 'wayland-egl wayland-client wayland-cursor xkbcommon'.split():
             ans.cflags.extend(pkg_config(dep, '--cflags-only-I'))
             ans.ldpaths.extend(pkg_config(dep, '--libs'))
@@ -100,13 +124,14 @@ def collect_source_information():
         'common': dict(extract_sources('common')),
         'wayland_protocols': wayland_protocols,
     }
+    joystick = 'null' if is_bsd else 'linux'
     for group in 'cocoa win32 x11 wayland osmesa'.split():
         m = re.search('_GLFW_' + group.upper(), raw)
         ans[group] = dict(extract_sources('glfw', m.start()))
-        if group == 'x11':
-            ans[group]['headers'].append('linux_joystick.h')
-            ans[group]['sources'].append('linux_joystick.c')
-        elif group == 'wayland':
+        if group in ('x11', 'wayland'):
+            ans[group]['headers'].append('{}_joystick.h'.format(joystick))
+            ans[group]['sources'].append('{}_joystick.c'.format(joystick))
+        if group == 'wayland':
             ans[group]['protocols'] = p = []
             for m in re.finditer(r'WAYLAND_PROTOCOLS_PKGDATADIR\}/(.+?)"?$', raw, flags=re.M):
                 p.append(m.group(1))
diff --git a/glfw/source-info.json b/glfw/source-info.json
index 16e34e9df..8b205fdbd 100644
--- a/glfw/source-info.json
+++ b/glfw/source-info.json
@@ -55,12 +55,12 @@
   "wayland": {
     "headers": [
       "wl_platform.h", 
-      "linux_joystick.h", 
       "posix_time.h", 
       "posix_thread.h", 
       "xkb_unicode.h", 
       "egl_context.h", 
-      "osmesa_context.h"
+      "osmesa_context.h", 
+      "linux_joystick.h"
     ], 
     "protocols": [
       "stable/xdg-shell/xdg-shell.xml", 
@@ -73,12 +73,12 @@
       "wl_init.c", 
       "wl_monitor.c", 
       "wl_window.c", 
-      "linux_joystick.c", 
       "posix_time.c", 
       "posix_thread.c", 
       "xkb_unicode.c", 
       "egl_context.c", 
-      "osmesa_context.c"
+      "osmesa_context.c", 
+      "linux_joystick.c"
     ]
   }, 
   "wayland_protocols": [
diff --git a/glfw/wl_init.c b/glfw/wl_init.c
index 6cd3df720..c19184d0d 100644
--- a/glfw/wl_init.c
+++ b/glfw/wl_init.c
@@ -1046,8 +1046,10 @@ int _glfwPlatformInit(void)
     // Sync so we got all initial output events
     wl_display_roundtrip(_glfw.wl.display);
 
+#ifdef __linux__
     if (!_glfwInitJoysticksLinux())
         return GLFW_FALSE;
+#endif
 
     _glfwInitTimerPOSIX();
 
@@ -1073,7 +1075,9 @@ int _glfwPlatformInit(void)
 
 void _glfwPlatformTerminate(void)
 {
+#ifdef __linux__
     _glfwTerminateJoysticksLinux();
+#endif
     _glfwTerminateEGL();
     if (_glfw.wl.egl.handle)
     {
diff --git a/glfw/wl_platform.h b/glfw/wl_platform.h
index e84d1b57c..ef8419e7b 100644
--- a/glfw/wl_platform.h
+++ b/glfw/wl_platform.h
@@ -47,7 +47,11 @@ typedef VkBool32 (APIENTRY *PFN_vkGetPhysicalDeviceWaylandPresentationSupportKHR
 
 #include "posix_thread.h"
 #include "posix_time.h"
+#ifdef __linux__
 #include "linux_joystick.h"
+#else
+#include "null_joystick.h"
+#endif
 #include "xkb_unicode.h"
 #include "egl_context.h"
 #include "osmesa_context.h"