Add a test with a cpp executable including all mbed TLS headers
In case of any problems with the 'extern "C"' directives,
building the executable will fail
diff --git a/programs/test/CMakeLists.txt b/programs/test/CMakeLists.txt
index 0c5ce27..32c1415 100644
--- a/programs/test/CMakeLists.txt
+++ b/programs/test/CMakeLists.txt
@@ -16,6 +16,9 @@
add_executable(benchmark benchmark.c)
target_link_libraries(benchmark ${libs})
+add_executable(header_test header_test.cpp)
+target_link_libraries(header_test ${libs})
+
add_executable(ssl_cert_test ssl_cert_test.c)
target_link_libraries(ssl_cert_test ${libs})