Clear Error message when backtrace_plugin load fails

.github/workflows/test.yml

@@ -43,7 +43,7 @@ jobs:
           LTTNG_UST_REGISTER_TIMEOUT:  0
           NUGET_XMLDOC_MODE:           skip
           DOTNET_CLI_TELEMETRY_OPTOUT: 'true'
-          METACALL_INSTALL_OPTIONS:    root base python ruby netcore5 nodejs typescript file rpc wasm java c cobol rust rapidjson funchook swig pack
+          METACALL_INSTALL_OPTIONS:    root base python ruby netcore5 nodejs typescript file rpc wasm java c cobol rust rapidjson funchook swig pack backtrace
 
       - name: Configure
         run: |

source/plugins/backtrace_plugin/source/backtrace_plugin.cpp

@@ -22,6 +22,8 @@
 
 #include <backward.hpp>
 
+#include <log/log.h>
+
 static backward::SignalHandling signal_handling;
 
 int backtrace_plugin(void *loader, void *handle, void *context)
@@ -30,5 +32,10 @@ int backtrace_plugin(void *loader, void *handle, void *context)
 	(void)handle;
 	(void)context;
 
-	return signal_handling.loaded() == true ? 0 : 1;
+	if (signal_handling.loaded() == false)
+	{
+		log_write("metacall", LOG_LEVEL_ERROR, "Backtrace plugin failed to load, you need unwind/libunwind for stacktracing and libbfd/libdw/libdwarf for the debug information. Install the required libraries and recompile to utilise the backtrace plugin. For more information visit https://github.com/bombela/backward-cpp");
+		return 1;
+	}
+	return 0;
 }

tools/metacall-runtime.sh

@@ -239,7 +239,7 @@ sub_cobol(){
 
 # Backtrace (this only improves stack traces verbosity but backtracing is enabled by default)
 sub_backtrace(){
-	echo "configure cobol"
+	echo "configure backtrace"
 
 	sub_apt_install_hold libdw1
 }