Fixed include path

dependency_support/com_github_westes_flex/flex.bzl

@@ -169,18 +169,3 @@ genlex(
     ],
     output_to_genfiles = True,
 )
-
-def _currrent_flex_lexer_header_impl(ctx):
-    flex_toolchain = ctx.toolchains["@rules_flex//flex:toolchain_type"].flex_toolchain
-
-    return [DefaultInfo(
-        files = depset([flex_toolchain.flex_lexer_h]),
-    )]
-
-current_flex_lexer_header = rule(
-    doc = "Access `FlexLexer.h` from the current toolchain.",
-    implementation = _currrent_flex_lexer_header_impl,
-    toolchains = [
-        "@rules_flex//flex:toolchain_type",
-    ],
-)

dependency_support/verilator/private/verilator_utils.bzl

@@ -267,3 +267,33 @@ verilator_build_template = rule(
         ),
     },
 )
+
+def _currrent_flex_lexer_header_impl(ctx):
+    flex_toolchain = ctx.toolchains["@rules_flex//flex:toolchain_type"].flex_toolchain
+
+    output = ctx.outputs.out
+    if output.basename != "FlexLexer.h":
+        fail("The output file must be a file named `FlexLexer.h`")
+
+    ctx.actions.symlink(
+        output = output,
+        target_file = flex_toolchain.flex_lexer_h,
+    )
+
+    return [DefaultInfo(
+        files = depset([output]),
+    )]
+
+current_flex_lexer_header = rule(
+    doc = "Access `FlexLexer.h` from the current toolchain.",
+    implementation = _currrent_flex_lexer_header_impl,
+    attrs = {
+        "out": attr.output(
+            doc = "The location in which to write the header file to.",
+            mandatory = True,
+        ),
+    },
+    toolchains = [
+        "@rules_flex//flex:toolchain_type",
+    ],
+)

dependency_support/verilator/verilator.BUILD.bazel

@@ -15,14 +15,15 @@
 
 load("@bazel_skylib//rules:write_file.bzl", "write_file")
 load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library")
-load("@rules_hdl//dependency_support/com_github_westes_flex:flex.bzl", "genlex", "current_flex_lexer_header")
+load("@rules_hdl//dependency_support/com_github_westes_flex:flex.bzl", "genlex")
 load(
     "@rules_hdl//dependency_support/verilator/private:verilator_utils.bzl",
     "verilator_astgen",
     "verilator_bisonpre",
     "verilator_build_template",
     "verilator_flexfix",
     "verilator_version",
+    "current_flex_lexer_header"
 )
 
 package(default_visibility = ["//visibility:private"])
@@ -198,11 +199,13 @@ cc_library(
 
 current_flex_lexer_header(
     name = "current_flex_lexer_header",
+    out = "fles/src/FlexLexer.h"
 )
 
 cc_library(
     name = "FlexLexer",
-    srcs = [":current_flex_lexer_header"],
+    srcs = [":fles/src/FlexLexer.h"],
+    includes = ["flex/src"],
 )
 
 # TODO(kkiningh): Verilator also supports multithreading, should we enable it?