Rebuild local Blender WASM environment and recovery evidence

blender-5.2.0/build_files/cmake/platform/platform_unix.cmake

@@ -166,6 +166,18 @@ if(WITH_VULKAN_BACKEND)
     find_package(PkgConfig)
     pkg_check_modules(VULKAN REQUIRED vulkan)
     pkg_check_modules(SHADERC REQUIRED shaderc)
+    # pkg-config exposes static archives through LDFLAGS, while Blender's
+    # dependency target consumes SHADERC_LIBRARIES. Keep a source-built
+    # Shaderc bundle self-contained and relocatable when it is provided.
+    if(DEFINED SHADERC_ROOT_DIR AND EXISTS "${SHADERC_ROOT_DIR}/lib/libshaderc_combined.a")
+      set(SHADERC_INCLUDE_DIRS "${SHADERC_ROOT_DIR}/include")
+      set(SHADERC_LIBRARIES "${SHADERC_ROOT_DIR}/lib/libshaderc_combined.a")
+      foreach(_shaderc_dependency IN ITEMS SPIRV-Tools-opt SPIRV-Tools)
+        if(EXISTS "${SHADERC_ROOT_DIR}/lib/lib${_shaderc_dependency}.a")
+          list(APPEND SHADERC_LIBRARIES "${SHADERC_ROOT_DIR}/lib/lib${_shaderc_dependency}.a")
+        endif()
+      endforeach()
+    endif()
   endif()
 endif()
 add_bundled_libraries(vulkan/lib)