Only use static Avro library

As the dynamic library is not available in most repositories, the static
one should be used.

cmake/FindAvro.cmake

@@ -0,0 +1,14 @@
+# This CMake file locates the libavro.a static library and the avro.h header
+#
+# The following variables are set:
+# AVRO_FOUND - If the Avro C library was found
+# AVRO_LIBRARIES - Path to the static library
+# AVRO_INCLUDE_DIR - Path to Avro headers
+
+find_path(AVRO_INCLUDE_DIRS avro.h)
+find_library(AVRO_LIBRARIES libavro.a)
+
+if (AVRO_INCLUDE_DIRS AND AVRO_LIBRARIES)
+  message(STATUS "Found Avro C libraries: ${AVRO_LIBRARIES}")
+  set(AVRO_FOUND TRUE)
+endif()

kafka-avro-adapter/CMakeLists.txt

@@ -36,6 +36,12 @@ if (NOT RDKAFKAPP_FOUND)
 endif()
 include_directories(${RDKAFKAPP_INCLUDE_DIRS})
 
+find_package(Avro)
+if (NOT AVRO_FOUND)
+    MESSAGE(FATAL_ERROR "Could not find Avro C-API static library: https://avro.apache.org/docs/1.8.2/")
+endif()
+include_directories(${AVRO_INCLUDE_DIRS})
+
 # Disable no-deprecated-declarations
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DDEBUG -Wall -Wunused -Wwrite-strings -Wno-strict-aliasing -Wextra -Wshadow -Werror -Wno-deprecated-declarations")
 

kafka-avro-adapter/src/CMakeLists.txt

@@ -1,5 +1,5 @@
 add_executable(kafka_to_avro kafka_to_avro.cpp common.cpp http_request.cpp controller.cpp kafka_consumer.cpp cs_producer.cpp)
-target_link_libraries(kafka_to_avro ${MCSAPI_LIBRARIES} ${JANSSON_LIBRARIES} ${RDKAFKAPP_LIBRARIES} avro curl pthread)
+target_link_libraries(kafka_to_avro ${MCSAPI_LIBRARIES} ${JANSSON_LIBRARIES} ${RDKAFKAPP_LIBRARIES} ${AVRO_LIBRARIES} curl pthread)
 install(TARGETS kafka_to_avro DESTINATION "${CMAKE_INSTALL_BINDIR}")
 
 if (WITH_TESTS)