meson: only build imgui when needed

Only required for Intel tools or the Vulkan overlay layer.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>

meson.build

@@ -53,6 +53,7 @@ with_glx_read_only_text = get_option('glx-read-only-text')
 with_glx_direct = get_option('glx-direct')
 with_osmesa = get_option('osmesa')
 with_swr_arches = get_option('swr-arches')
+with_vulkan_overlay_layer = get_option('vulkan-overlay-layer')
 with_tools = get_option('tools')
 if with_tools.contains('all')
   with_tools = [
@@ -69,6 +70,9 @@ if with_tools.contains('all')
   ]
 endif
 
+with_intel_tools = with_tools.contains('intel') or with_tools.contains('intel-ui')
+with_imgui = with_intel_tools or with_vulkan_overlay_layer
+
 dri_drivers_path = get_option('dri-drivers-path')
 if dri_drivers_path == ''
   dri_drivers_path = join_paths(get_option('prefix'), get_option('libdir'), 'dri')

src/intel/meson.build

@@ -28,7 +28,7 @@ subdir('isl')
 subdir('common')
 subdir('compiler')
 subdir('perf')
-if with_tools.contains('intel') or with_tools.contains('intel-ui')
+if with_intel_tools
   subdir('tools')
 endif
 if with_intel_vk

src/meson.build

@@ -60,7 +60,9 @@ subdir('compiler')
 if with_tools.contains('drm-shim')
   subdir('drm-shim')
 endif
-subdir('imgui')
+if with_imgui
+  subdir('imgui')
+endif
 if with_platform_wayland
   subdir('egl/wayland/wayland-drm')
 endif

src/vulkan/meson.build

@@ -59,6 +59,6 @@ endif
 
 subdir('util')
 subdir('wsi')
-if get_option('vulkan-overlay-layer')
+if with_vulkan_overlay_layer
   subdir('overlay-layer')
 endif