From 813ce643223016d2daf5bb885db89ad9e0ce2faa Mon Sep 17 00:00:00 2001
From: Pavel Guzenfeld <67074795+PavelGuzenfeld@users.noreply.github.com>
Date: Sun, 15 Mar 2026 22:23:47 +0200
Subject: [PATCH] Add missing #include <cstdint> in DDSSQLFilter headers

GCC 13+ and GCC 15+ no longer provide transitive includes for
fixed-width integer types (uint8_t, uint32_t, etc.). The DDSSQLFilter
headers use these types without explicitly including <cstdint>, causing
compilation failures with modern compilers.

This is a backport of the fix from PR #5796 (which was applied to
master, 3.1.x, 2.14.x, and 2.10.x) to the 2.6.x branch. ROS 2 Humble
depends on Fast-DDS 2.6.x and is supported until 2027.

Refs: #5790

Signed-off-by: Pavel Guzenfeld <67074795+PavelGuzenfeld@users.noreply.github.com>
---
 .../fastdds/topic/DDSSQLFilter/DDSFilterCompoundCondition.hpp    | 1 +
 src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterPredicate.hpp        | 1 +
 src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterValue.hpp            | 1 +
 3 files changed, 3 insertions(+)

diff --git a/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterCompoundCondition.hpp b/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterCompoundCondition.hpp
index 2eb46e19acb..91845e3b6b9 100644
--- a/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterCompoundCondition.hpp
+++ b/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterCompoundCondition.hpp
@@ -19,6 +19,7 @@
 #ifndef _FASTDDS_TOPIC_DDSSQLFILTER_DDSFILTERCOMPOUNDCONDITION_HPP_
 #define _FASTDDS_TOPIC_DDSSQLFILTER_DDSFILTERCOMPOUNDCONDITION_HPP_
 
+#include <cstdint>
 #include <memory>
 
 #include "DDSFilterCondition.hpp"
diff --git a/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterPredicate.hpp b/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterPredicate.hpp
index d57275a232c..6fab593e5b1 100644
--- a/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterPredicate.hpp
+++ b/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterPredicate.hpp
@@ -19,6 +19,7 @@
 #ifndef _FASTDDS_TOPIC_DDSSQLFILTER_DDSFILTERPREDICATE_HPP_
 #define _FASTDDS_TOPIC_DDSSQLFILTER_DDSFILTERPREDICATE_HPP_
 
+#include <cstdint>
 #include <memory>
 
 #include "DDSFilterCondition.hpp"
diff --git a/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterValue.hpp b/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterValue.hpp
index da75c7372ec..5509df388bd 100644
--- a/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterValue.hpp
+++ b/src/cpp/fastdds/topic/DDSSQLFilter/DDSFilterValue.hpp
@@ -19,6 +19,7 @@
 #ifndef _FASTDDS_TOPIC_DDSSQLFILTER_DDSFILTERVALUE_HPP_
 #define _FASTDDS_TOPIC_DDSSQLFILTER_DDSFILTERVALUE_HPP_
 
+#include <cstdint>
 #include <memory>
 #include <regex>