Permit packages that depend on Intel oneAPI packages to access sdk (#41117)

* Permit packages that depend on Intel oneAPI packages to access sdk

* Implement and use IntelOneapiLibraryPackageWithSdk

* Restore libs property to IntelOneapiLibraryPackage

* Conform to style

* Provide new class to infrastructure

* Treat sdk/include as the main include

lib/spack/spack/build_systems/oneapi.py

@@ -179,6 +179,35 @@ def libs(self):
         return find_libraries("*", root=lib_path, shared=True, recursive=True)
 
 
+class IntelOneApiLibraryPackageWithSdk(IntelOneApiPackage):
+    """Base class for Intel oneAPI library packages with SDK components.
+
+    Contains some convenient default implementations for libraries
+    that expose functionality in sdk subdirectories.
+    Implement the method directly in the package if something
+    different is needed.
+
+    """
+
+    @property
+    def include(self):
+        return join_path(self.component_prefix, "sdk", "include")
+
+    @property
+    def headers(self):
+        return find_headers("*", self.include, recursive=True)
+
+    @property
+    def lib(self):
+        lib_path = join_path(self.component_prefix, "sdk", "lib64")
+        lib_path = lib_path if isdir(lib_path) else dirname(lib_path)
+        return lib_path
+
+    @property
+    def libs(self):
+        return find_libraries("*", root=self.lib, shared=True, recursive=True)
+
+
 class IntelOneApiStaticLibraryList:
     """Provides ld_flags when static linking is needed
 

lib/spack/spack/package.py

@@ -52,6 +52,7 @@
 from spack.build_systems.oneapi import (
     INTEL_MATH_LIBRARIES,
     IntelOneApiLibraryPackage,
+    IntelOneApiLibraryPackageWithSdk,
     IntelOneApiPackage,
     IntelOneApiStaticLibraryList,
 )