1 files changed, 45 insertions, 0 deletions
diff --git a/media-libs/vulkan-loader/files/vulkan-loader-1.1.70.0-Dont-require-glslang-if-not-building-layers.patch b/media-libs/vulkan-loader/files/vulkan-loader-1.1.70.0-Dont-require-glslang-if-not-building-layers.patch
new file mode 100644
index 000000000000..3c5a30b10a00
--- /dev/null
+++ b/media-libs/vulkan-loader/files/vulkan-loader-1.1.70.0-Dont-require-glslang-if-not-building-layers.patch
@@ -0,0 +1,45 @@
+From 4efbd5c81cfb9071757e446d57957aa81e9d9374 Mon Sep 17 00:00:00 2001
+From: James Le Cuirot <chewi@gentoo.org>
+Date: Thu, 15 Mar 2018 22:25:19 +0000
+Subject: [PATCH] build: Don't require glslang if not building layers
+
+---
+ CMakeLists.txt | 10 ++++++++--
+ 1 file changed, 8 insertions(+), 2 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 713a9cdfd3..c9f73ce965 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -350,6 +350,10 @@ macro(run_external_revision_generate source_dir symbol_name output)
+ endmacro()
+ 
+ # Custom target for generated vulkan helper file dependencies
++set(generate_helper_files_DEPENDS)
++if(BUILD_LAYERS)
++    LIST(APPEND generate_helper_files_DEPENDS spirv_tools_commit_id.h)
++endif()
+ add_custom_target(generate_helper_files DEPENDS
+     vk_enum_string_helper.h
+     vk_safe_struct.h
+@@ -359,7 +363,7 @@ add_custom_target(generate_helper_files DEPENDS
+     vk_dispatch_table_helper.h
+     vk_extension_helper.h
+     vk_typemap_helper.h
+-    spirv_tools_commit_id.h
++    ${generate_helper_files_DEPENDS}
+     )
+ set_target_properties(generate_helper_files PROPERTIES FOLDER ${LVL_TARGET_FOLDER})
+ 
+@@ -372,7 +376,9 @@ run_vk_xml_generate(helper_file_generator.py vk_enum_string_helper.h)
+ run_vk_xml_generate(helper_file_generator.py vk_object_types.h)
+ run_vk_xml_generate(helper_file_generator.py vk_extension_helper.h)
+ run_vk_xml_generate(helper_file_generator.py vk_typemap_helper.h)
+-run_external_revision_generate(${EXTERNAL_SOURCE_ROOT}/glslang/External/spirv-tools SPIRV_TOOLS_COMMIT_ID spirv_tools_commit_id.h)
++if(BUILD_LAYERS)
++    run_external_revision_generate(${EXTERNAL_SOURCE_ROOT}/glslang/External/spirv-tools SPIRV_TOOLS_COMMIT_ID spirv_tools_commit_id.h)
++endif()
+ 
+ 
+ 
+