buildroot/package/fluent-bit/0001-plugins-kafka-fix-cmake-cross-compile-error.patch

From f32c4e909ec4a4872c2c5fc186f27d1f7e4e8c2a Mon Sep 17 00:00:00 2001
From: Thomas Devoogdt <thomas@devoogdt.com>
Date: Sat, 16 Nov 2024 19:46:28 +0100
Subject: [PATCH] plugins: kafka: fix cmake cross compile error

KAFKA_INCLUDEDIR is not set if FLB_PREFER_SYSTEM_LIB_KAFKA is not used,
when cross-compiling, it just translates to -I/librdkafka, which is not allowed.
Fix this by only including KAFKA_INCLUDEDIR if really set.

x86_64-linux-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/librdkafka'

Upstream: https://github.com/fluent/fluent-bit/pull/9600
Signed-off-by: Thomas Devoogdt <thomas@devoogdt.com>
---
 plugins/in_kafka/CMakeLists.txt  | 4 +++-
 plugins/out_kafka/CMakeLists.txt | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/plugins/in_kafka/CMakeLists.txt b/plugins/in_kafka/CMakeLists.txt
index ede0831f9..02e2dc786 100644
--- a/plugins/in_kafka/CMakeLists.txt
+++ b/plugins/in_kafka/CMakeLists.txt
@@ -3,5 +3,7 @@ set(src
   )
 
 FLB_PLUGIN(in_kafka "${src}" ${KAFKA_LIBRARIES})
-target_include_directories(flb-plugin-in_kafka PUBLIC ${KAFKA_INCLUDEDIR}/librdkafka)
+if(DEFINED KAFKA_INCLUDEDIR)
+  target_include_directories(flb-plugin-in_kafka PUBLIC ${KAFKA_INCLUDEDIR}/librdkafka)
+endif()
 target_link_libraries(flb-plugin-in_kafka -lpthread)
diff --git a/plugins/out_kafka/CMakeLists.txt b/plugins/out_kafka/CMakeLists.txt
index 01c96529b..54b14fc2a 100644
--- a/plugins/out_kafka/CMakeLists.txt
+++ b/plugins/out_kafka/CMakeLists.txt
@@ -5,5 +5,7 @@ set(src
   kafka.c)
 
 FLB_PLUGIN(out_kafka "${src}" ${KAFKA_LIBRARIES})
-target_include_directories(flb-plugin-out_kafka PUBLIC ${KAFKA_INCLUDEDIR}/librdkafka)
+if(DEFINED KAFKA_INCLUDEDIR)
+  target_include_directories(flb-plugin-out_kafka PUBLIC ${KAFKA_INCLUDEDIR}/librdkafka)
+endif()
 target_link_libraries(flb-plugin-out_kafka -lpthread)
-- 
2.43.0