From 64bc3dcab6b96b96a0c41de85eb9121ef7b69151 Mon Sep 17 00:00:00 2001
From: Martin Dahl <martin.dahl@gmail.com>
Date: Tue, 20 Jun 2023 08:40:59 +0200
Subject: [PATCH] Don't include function pointers when building with cfg
 doc-only.

---
 r2r_msg_gen/build.rs | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/r2r_msg_gen/build.rs b/r2r_msg_gen/build.rs
index 66430ce..de4443d 100644
--- a/r2r_msg_gen/build.rs
+++ b/r2r_msg_gen/build.rs
@@ -84,8 +84,15 @@ fn generate_bindings(bindgen_dir: &Path, msg_list: &[RosMsg]) {
     let bindings_file = bindgen_dir.join(BINDINGS_FILENAME);
 
     let mut includes = String::new();
-    let mut introspecion_map = String::from(
-        "\
+    let mut introspecion_map = String::from("
+         #[cfg(feature = \"doc-only\")]
+         lazy_static! {
+           static ref INTROSPECTION_FNS: HashMap<&'static str, usize> = {
+             HashMap::new()
+           };
+         }
+
+         #[cfg(not(feature = \"doc-only\"))]
          lazy_static! {
            static ref INTROSPECTION_FNS: HashMap<&'static str, usize> = {
              let mut m = HashMap::new();