From ed0a62b14177c069c2f79345887390ed2c276a2b Mon Sep 17 00:00:00 2001 From: Thomas Devoogdt Date: Sun, 15 Feb 2026 20:41:10 +0100 Subject: [PATCH] CMakeLists.txt: allow compilation without C++ support $ CXX=/bin/false cmake . && make Signed-off-by: Thomas Devoogdt --- CMakeLists.txt | 25 ++++++++++++++++++++----- examples/CMakeLists.txt | 30 ++++++++++++++++++++---------- 2 files changed, 40 insertions(+), 15 deletions(-) diff --git a/CMakeLists.txt b/CMakeLists.txt index f3d05bad7a..7676f897b1 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -3,7 +3,15 @@ cmake_minimum_required(VERSION 3.5) include("packaging/cmake/parseversion.cmake") parseversion("src/rdkafka.h") -project(RdKafka VERSION ${RDKAFKA_VERSION}) +project(RdKafka VERSION ${RDKAFKA_VERSION} LANGUAGES C) + +include(CheckLanguage) +check_language(CXX) +if(CMAKE_CXX_COMPILER) + enable_language(CXX) +else() + message(STATUS "C++ compiler not found, skipping C++ support") +endif() set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/packaging/cmake/Modules/") @@ -181,7 +189,7 @@ endif() option(RDKAFKA_BUILD_STATIC "Build static rdkafka library" OFF) option(RDKAFKA_BUILD_EXAMPLES "Build examples" ON) -option(RDKAFKA_BUILD_TESTS "Build tests" ON) +option(RDKAFKA_BUILD_TESTS "Build tests" CMAKE_CXX_COMPILER) if(WIN32) option(WITHOUT_WIN32_CONFIG "Avoid including win32_config.h on cmake builds" ON) endif(WIN32) @@ -279,13 +287,20 @@ install( ) add_subdirectory(src) -add_subdirectory(src-cpp) + +if(CMAKE_CXX_COMPILER) + add_subdirectory(src-cpp) +endif() if(RDKAFKA_BUILD_EXAMPLES) add_subdirectory(examples) endif() if(RDKAFKA_BUILD_TESTS) - enable_testing() - add_subdirectory(tests) + if(CMAKE_CXX_COMPILER) + enable_testing() + add_subdirectory(tests) + else() + message(FATAL_ERROR "Building tests needs C++ suport") + endif() endif() diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt index 91851d2cbf..28ce6e7943 100644 --- a/examples/CMakeLists.txt +++ b/examples/CMakeLists.txt @@ -5,8 +5,10 @@ endif(WIN32) add_executable(producer producer.c ${win32_sources}) target_link_libraries(producer PUBLIC rdkafka) -add_executable(producer_cpp producer.cpp ${win32_sources}) -target_link_libraries(producer_cpp PUBLIC rdkafka++) +if(CMAKE_CXX_COMPILER) + add_executable(producer_cpp producer.cpp ${win32_sources}) + target_link_libraries(producer_cpp PUBLIC rdkafka++) +endif(CMAKE_CXX_COMPILER) add_executable(consumer consumer.c ${win32_sources}) target_link_libraries(consumer PUBLIC rdkafka) @@ -14,14 +16,20 @@ target_link_libraries(consumer PUBLIC rdkafka) add_executable(rdkafka_performance rdkafka_performance.c ${win32_sources}) target_link_libraries(rdkafka_performance PUBLIC rdkafka) -add_executable(rdkafka_example_cpp rdkafka_example.cpp ${win32_sources}) -target_link_libraries(rdkafka_example_cpp PUBLIC rdkafka++) +if(CMAKE_CXX_COMPILER) + add_executable(rdkafka_example_cpp rdkafka_example.cpp ${win32_sources}) + target_link_libraries(rdkafka_example_cpp PUBLIC rdkafka++) +endif(CMAKE_CXX_COMPILER) -add_executable(rdkafka_complex_consumer_example_cpp rdkafka_complex_consumer_example.cpp ${win32_sources}) -target_link_libraries(rdkafka_complex_consumer_example_cpp PUBLIC rdkafka++) +if(CMAKE_CXX_COMPILER) + add_executable(rdkafka_complex_consumer_example_cpp rdkafka_complex_consumer_example.cpp ${win32_sources}) + target_link_libraries(rdkafka_complex_consumer_example_cpp PUBLIC rdkafka++) +endif(CMAKE_CXX_COMPILER) -add_executable(openssl_engine_example_cpp openssl_engine_example.cpp ${win32_sources}) -target_link_libraries(openssl_engine_example_cpp PUBLIC rdkafka++) +if(CMAKE_CXX_COMPILER) + add_executable(openssl_engine_example_cpp openssl_engine_example.cpp ${win32_sources}) + target_link_libraries(openssl_engine_example_cpp PUBLIC rdkafka++) +endif(CMAKE_CXX_COMPILER) add_executable(misc misc.c ${win32_sources}) target_link_libraries(misc PUBLIC rdkafka) @@ -73,7 +81,9 @@ if(NOT WIN32) add_executable(rdkafka_complex_consumer_example rdkafka_complex_consumer_example.c) target_link_libraries(rdkafka_complex_consumer_example PUBLIC rdkafka) - add_executable(kafkatest_verifiable_client kafkatest_verifiable_client.cpp) - target_link_libraries(kafkatest_verifiable_client PUBLIC rdkafka++) + if(CMAKE_CXX_COMPILER) + add_executable(kafkatest_verifiable_client kafkatest_verifiable_client.cpp) + target_link_libraries(kafkatest_verifiable_client PUBLIC rdkafka++) + endif(CMAKE_CXX_COMPILER) endif(NOT WIN32)