meson-haiku.diff

diff --git a/meson.build b/meson.build
index d6ffa30d9e..117e8941d1 100644
--- a/meson.build
+++ b/meson.build
@@ -99,7 +99,7 @@ if _drivers == 'auto'
     else
       error('Unknown architecture. Please pass -Ddri-drivers to set driver options. Patches gladly accepted to fix this.')
     endif
-  elif ['darwin', 'windows', 'cygwin'].contains(host_machine.system())
+  elif ['darwin', 'windows', 'cygwin', 'haiku'].contains(host_machine.system())
     # only swrast would make sense here, but gallium swrast is a much better default
     _drivers = ''
   else
@@ -144,7 +144,7 @@ if _drivers == 'auto'
     else
       error('Unknown architecture. Please pass -Dgallium-drivers to set driver options. Patches gladly accepted to fix this.')
     endif
-  elif ['darwin', 'windows', 'cygwin'].contains(host_machine.system())
+  elif ['darwin', 'windows', 'cygwin', 'haiku'].contains(host_machine.system())
     _drivers = 'swrast'
   else
     error('Unknown OS. Please pass -Dgallium-drivers to set driver options. Patches gladly accepted to fix this.')
@@ -181,7 +181,7 @@ if _vulkan_drivers == 'auto'
     else
       error('Unknown architecture. Please pass -Dvulkan-drivers to set driver options. Patches gladly accepted to fix this.')
     endif
-  elif ['darwin', 'windows', 'cygwin'].contains(host_machine.system())
+  elif ['darwin', 'windows', 'cygwin', 'haiku'].contains(host_machine.system())
     # No vulkan driver supports windows or macOS currently
     _vulkan_drivers = ''
   else
@@ -242,6 +242,8 @@ if _platforms == 'auto'
     _platforms = 'x11,wayland,drm,surfaceless'
   elif ['darwin', 'windows', 'cygwin'].contains(host_machine.system())
     _platforms = 'x11,surfaceless'
+  elif ['haiku'].contains(host_machine.system())
+    _platforms = 'haiku'
   else
     error('Unknown OS. Please pass -Dplatforms to set platforms. Patches gladly accepted to fix this.')
   endif
@@ -252,6 +254,7 @@ if _platforms != ''
   with_platform_x11 = _split.contains('x11')
   with_platform_wayland = _split.contains('wayland')
   with_platform_drm = _split.contains('drm')
+  with_platform_haiku = _split.contains('haiku')
   with_platform_surfaceless = _split.contains('surfaceless')
   egl_native_platform = _split[0]
 endif
@@ -260,6 +263,8 @@ with_glx = get_option('glx')
 if with_glx == 'auto'
   if with_dri
     with_glx = 'dri'
+  elif with_platform_haiku
+    with_glx = 'disabled'
   elif with_gallium
     # Even when building just gallium drivers the user probably wants dri
     with_glx = 'dri'
@@ -375,7 +380,7 @@ if with_any_vk and (with_platform_x11 and not with_dri3)
   error('Vulkan drivers require dri3 for X11 support')
 endif
 if with_dri or with_gallium
-  if with_glx == 'disabled' and not with_egl
+  if with_glx == 'disabled' and not with_egl and not with_platform_haiku
     error('building dri or gallium drivers require at least one window system')
   endif
 endif
@@ -1234,7 +1239,7 @@ if with_dri_platform == 'drm'
 endif
 
 gl_priv_libs = []
-if dep_thread.found()
+if dep_thread.found() and host_machine.system() != 'haiku'
   gl_priv_libs += ['-lpthread', '-pthread']
 endif
 if dep_m.found()
diff --git a/src/mapi/es1api/meson.build b/src/mapi/es1api/meson.build
index ea14654d2c..38a5747e9a 100644
--- a/src/mapi/es1api/meson.build
+++ b/src/mapi/es1api/meson.build
@@ -48,7 +48,7 @@ pkg.generate(
   description : 'Mesa OpenGL ES 1.1 CM library',
   version : meson.project_version(),
   libraries : libglesv1_cm,
-  libraries_private : '-lm -ldl -lpthread -pthread',
+  libraries_private : gl_priv_libs,
 )
 
 if with_tests
diff --git a/src/mapi/es2api/meson.build b/src/mapi/es2api/meson.build
index de8a29bb6b..9f4770a738 100644
--- a/src/mapi/es2api/meson.build
+++ b/src/mapi/es2api/meson.build
@@ -48,7 +48,7 @@ pkg.generate(
   description : 'Mesa OpenGL ES 2.0 library',
   version : meson.project_version(),
   libraries : libgles2,
-  libraries_private : '-lm -ldl -lpthread -pthread',
+  libraries_private : gl_priv_libs,
 )
 
 if with_tests
diff --git a/src/meson.build b/src/meson.build
index 730b2ff6e4..4d5637f0aa 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -64,7 +64,12 @@ if with_dri_i965 or with_intel_vk
 endif
 subdir('mesa')
 subdir('loader')
-subdir('glx')
+if with_platform_haiku
+  subdir('hgl')
+endif
+if with_glx != 'disabled'
+  subdir('glx')
+endif
 if with_gbm
   subdir('gbm')
 else