From 91d56cb5c5abddc701335917d08409b7cb55c5a1 Mon Sep 17 00:00:00 2001
From: Giovanni Bussi <giovanni.bussi@gmail.com>
Date: Mon, 4 Dec 2023 17:34:47 +0100
Subject: [PATCH] Print library path in log file

---
 src/config/Config.h      |  2 ++
 src/config/Config.inc.in | 13 +++++++++++++
 src/core/PlumedMain.cpp  |  2 +-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/config/Config.h b/src/config/Config.h
index c5d3a319b7..1604c5bab6 100644
--- a/src/config/Config.h
+++ b/src/config/Config.h
@@ -107,6 +107,8 @@ bool hasExternalMolfile();
 
 bool hasZlib();
 
+std::string getLibraryPath();
+
 }
 }
 
diff --git a/src/config/Config.inc.in b/src/config/Config.inc.in
index 484679d1c2..412bb27504 100644
--- a/src/config/Config.inc.in
+++ b/src/config/Config.inc.in
@@ -24,6 +24,7 @@
 #include "version.h"
 #include <cstdlib>
 #include <cstring>
+#include <dlfcn.h>
 
 namespace PLMD {
 namespace config {
@@ -177,6 +178,18 @@ std::string getCompilationTime() {
   return __TIME__;
 }
 
+std::string getLibraryPath() {
+#ifdef __PLUMED_HAS_DLADDR
+  Dl_info info;
+  if(dladdr((void*)getLibraryPath,&info)) {
+    return info.dli_fname;
+  } else {
+    return "";
+  }
+#endif
+
+}
+
 
 }
 }
diff --git a/src/core/PlumedMain.cpp b/src/core/PlumedMain.cpp
index e64e4210e4..1762a92e07 100644
--- a/src/core/PlumedMain.cpp
+++ b/src/core/PlumedMain.cpp
@@ -65,7 +65,6 @@
 #include <variant>
 #include <filesystem>
 
-
 namespace PLMD {
 
 /// Small utility just used in this file to throw arbitrary exceptions
@@ -757,6 +756,7 @@ void PlumedMain::init() {
   log<<"\n";
   log<<"For further information see the PLUMED web page at http://www.plumed.org\n";
   log<<"Root: "<<config::getPlumedRoot()<<"\n";
+  log<<"LibraryPath: "<<config::getLibraryPath()<<"\n";
   log<<"For installed feature, see "<<config::getPlumedRoot() + "/src/config/config.txt\n";
   log.printf("Molecular dynamics engine: %s\n",MDEngine.c_str());
   log.printf("Precision of reals: %d\n",atoms.getRealPrecision());