[Mesa-stable] [PATCH] haiku: Fix build through scons corrections and viewport fixes

[Alexander von Gluck IV]

* Add HAVE_PTHREAD, we do have pthread support wrappers now for
  non-native Haiku threaded applications.
* Viewport changed behavior recently breaking the build.
  We fix this by looking at the gl_context ViewportArray
  (Thanks Brian for the idea)
---
 scons/gallium.py                                   |    5 +++++
 .../targets/haiku-softpipe/GalliumContext.cpp      |   12 +++++++++---
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/scons/gallium.py b/scons/gallium.py
index f505a62..e11d4db 100755
--- a/scons/gallium.py
+++ b/scons/gallium.py
@@ -269,6 +269,11 @@ def generate(env):
             cppdefines += ['HAVE_ALIAS']
         else:
             cppdefines += ['GLX_ALIAS_UNSUPPORTED']
+    if env['platform'] == 'haiku':
+        cppdefines += [
+            'HAVE_PTHREAD',
+            'HAVE_POSIX_MEMALIGN'
+        ]
     if platform == 'windows':
         cppdefines += [
             'WIN32',
diff --git a/src/gallium/targets/haiku-softpipe/GalliumContext.cpp b/src/gallium/targets/haiku-softpipe/GalliumContext.cpp
index 1078cb7..52cd764 100644
--- a/src/gallium/targets/haiku-softpipe/GalliumContext.cpp
+++ b/src/gallium/targets/haiku-softpipe/GalliumContext.cpp
@@ -44,9 +44,15 @@ extern "C" {
 
 
 static void
-hgl_viewport(struct gl_context* glContext, GLint x, GLint y,
-	GLsizei width, GLsizei height)
+hgl_viewport(struct gl_context* glContext)
 {
+	// TODO: We should try to eliminate this function
+
+	GLint x = glContext->ViewportArray[0].X;
+	GLint y = glContext->ViewportArray[0].Y;
+	GLint width = glContext->ViewportArray[0].Width;
+	GLint height = glContext->ViewportArray[0].Height;
+
 	TRACE("%s(glContext: %p, x: %d, y: %d, w: %d, h: %d\n", __func__,
 		glContext, x, y, width, height);
 
@@ -525,7 +531,7 @@ GalliumContext::ResizeViewport(int32 width, int32 height)
 	for (context_id i = 0; i < CONTEXT_MAX; i++) {
 		if (fContext[i] && fContext[i]->st) {
 			struct st_context *stContext = (struct st_context*)fContext[i]->st;
-			_mesa_set_viewport(stContext->ctx, 0, 0, width, height);
+			_mesa_set_viewport(stContext->ctx, 0, 0, 0, width, height);
         		st_manager_validate_framebuffers(stContext);
 		}
 	}
-- 
1.7.9.5