fix: update linker to be tolerant to linking to different output trees

This can happen when 'static' links come from cfg='exec' binaries

internal/linker/link_node_modules.bzl

@@ -50,8 +50,22 @@ def _link_mapping(label, mappings, k, v):
         # Map values are of format [deprecated, link_path]
         iter_package_name = iter_key.split(":")[0]
         iter_source_path = iter_values
-        if package_name == iter_package_name and link_path != iter_source_path:
-            fail("conflicting mapping at '%s': '%s' and '%s' map to conflicting %s and %s" % (label, k, iter_key, link_path, iter_source_path))
+        if package_name == iter_package_name:
+            # If we're linking to the output tree be tolerant of linking to different
+            # output trees since we can have "static" links that come from cfg="exec" binaries.
+            # In the future when we static link directly into runfiles without the linker
+            # we can remove this logic.
+            link_path_segments = link_path.split("/")
+            iter_source_path_segments = iter_source_path.split("/")
+            bin_links = link_path_segments[0] == "bazel-out" and iter_source_path_segments[0] == "bazel-out" and link_path_segments[2] == "bin" and iter_source_path_segments[2] == "bin"
+            if bin_links:
+                compare_link_path = "/".join(link_path_segments[3:])
+                compare_iter_source_path = "/".join(iter_source_path_segments[3:])
+            else:
+                compare_link_path = link_path
+                compare_iter_source_path = iter_source_path
+            if compare_link_path != compare_iter_source_path:
+                fail("conflicting mapping at '%s': '%s' and '%s' map to conflicting %s and %s" % (label, k, iter_key, compare_link_path, compare_iter_source_path))
 
     return True