tless: add demo functions

func/demo/CMakeLists.txt

@@ -89,6 +89,7 @@ demo_func(string string.cpp)
 demo_func(sysconf sysconf.cpp)
 demo_func(time time.cpp)
 demo_func(time_of_day time_of_day.cpp)
+demo_func(tless tless.cpp)
 demo_func(uname uname.cpp)
 demo_func(va_arg va_arg.cpp)
 demo_func(waitpid waitpid.cpp)

func/demo/tless.cpp

@@ -0,0 +1,22 @@
+#include <cstdint>
+#include <iostream>
+#include <string>
+
+extern "C" {
+void __tless_get_attestation_jwt(char** jwtPtrPtr, int32_t* jwtPtrSize);
+}
+
+int main()
+{
+    char* jwt;
+    int32_t jwtSize;
+
+    // JWT is heap-allocated
+    __tless_get_attestation_jwt(&jwt, &jwtSize);
+
+    std::string jwtStr(jwt);
+
+    std::cout << "JWT: " << jwtStr << std::endl;
+
+    return 0;
+}

libfaasm/libfaasm.imports

@@ -54,3 +54,6 @@ __faasm_s3_get_key_bytes
 
 # Test
 __faasm_host_interface_test
+
+# TLess TODO consider!
+__tless_get_attestation_jwt