Added test for dladdr

configure

@@ -732,6 +732,7 @@ enable_molfile_plugins
 enable_external_molfile_plugins
 enable_zlib
 enable_dlopen
+enable_dladdr
 enable_rtld_default
 enable_subprocess
 enable_popen
@@ -1430,6 +1431,7 @@ Optional Features:
                           yes
   --enable-zlib           enable search for zlib, default: yes
   --enable-dlopen         enable search for dlopen, default: yes
+  --enable-dladdr         enable search for dladdr, default: yes
   --enable-rtld_default   enable search for RTLD_DEFAULT macro, default: yes
   --enable-subprocess     enable search for functions needed to manage a
                           subprocess, default: yes
@@ -2961,6 +2963,24 @@ fi
 
 
 
+dladdr=
+# Check whether --enable-dladdr was given.
+if test "${enable_dladdr+set}" = set; then :
+  enableval=$enable_dladdr; case "${enableval}" in
+             (yes) dladdr=true ;;
+             (no)  dladdr=false ;;
+             (*)   as_fn_error $? "wrong argument to --enable-dladdr" "$LINENO" 5 ;;
+  esac
+else
+  case "yes" in
+             (yes) dladdr=true ;;
+             (no)  dladdr=false ;;
+  esac
+
+fi
+
+
+
 rtld_default=
 # Check whether --enable-rtld_default was given.
 if test "${enable_rtld_default+set}" = set; then :
@@ -6741,6 +6761,144 @@ if test "x$ac_cv_lib_dl_dlopen" = xyes; then :
 fi
 
 
+
+
+    found=ko
+    __PLUMED_HAS_DLADDR=no
+    ac_fn_cxx_check_header_mongrel "$LINENO" "dlfcn.h" "ac_cv_header_dlfcn_h" "$ac_includes_default"
+if test "x$ac_cv_header_dlfcn_h" = xyes; then :
+
+
+  if test "${libsearch}" = true ; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dladdr" >&5
+$as_echo_n "checking for library containing dladdr... " >&6; }
+if ${ac_cv_search_dladdr+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dladdr ();
+int
+main ()
+{
+return dladdr ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' ; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_cxx_try_link "$LINENO"; then :
+  ac_cv_search_dladdr=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_dladdr+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_dladdr+:} false; then :
+
+else
+  ac_cv_search_dladdr=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dladdr" >&5
+$as_echo "$ac_cv_search_dladdr" >&6; }
+ac_res=$ac_cv_search_dladdr
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+  found=ok
+fi
+
+  else
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dladdr" >&5
+$as_echo_n "checking for library containing dladdr... " >&6; }
+if ${ac_cv_search_dladdr+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dladdr ();
+int
+main ()
+{
+return dladdr ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' ; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_cxx_try_link "$LINENO"; then :
+  ac_cv_search_dladdr=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_dladdr+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_dladdr+:} false; then :
+
+else
+  ac_cv_search_dladdr=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dladdr" >&5
+$as_echo "$ac_cv_search_dladdr" >&6; }
+ac_res=$ac_cv_search_dladdr
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+  found=ok
+fi
+
+  fi
+
+
+fi
+
+
+    if test $found = ok ; then
+       $as_echo "#define __PLUMED_HAS_DLADDR 1" >>confdefs.h
+
+       __PLUMED_HAS_DLADDR=yes
+    else
+       { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cannot enable __PLUMED_HAS_DLADDR" >&5
+$as_echo "$as_me: WARNING: cannot enable __PLUMED_HAS_DLADDR" >&2;}
+    fi
+
+
 mpi_found=ko
 # optional libraries follow
 if test $mpi = true ; then

configure.ac

@@ -309,6 +309,7 @@ PLUMED_CONFIG_ENABLE([molfile-plugins],[use molfile_plugins],[yes])
 PLUMED_CONFIG_ENABLE([external-molfile-plugins],[search for external molfile_plugins],[yes])
 PLUMED_CONFIG_ENABLE([zlib],[search for zlib],[yes])
 PLUMED_CONFIG_ENABLE([dlopen],[search for dlopen],[yes])
+PLUMED_CONFIG_ENABLE([dladdr],[search for dladdr],[yes])
 PLUMED_CONFIG_ENABLE([rtld_default],[search for RTLD_DEFAULT macro],[yes])
 PLUMED_CONFIG_ENABLE([subprocess],[search for functions needed to manage a subprocess],[yes])
 PLUMED_CONFIG_ENABLE([popen],[search for popen],[yes])
@@ -674,6 +675,9 @@ fi
 # to be loaded later
 AC_CHECK_LIB([dl],dlopen, [STATIC_LIBS="-ldl $STATIC_LIBS"] [LIBS="-ldl $LIBS"])
 
+
+PLUMED_CHECK_PACKAGE([dlfcn.h],[dladdr],[__PLUMED_HAS_DLADDR])
+
 mpi_found=ko
 # optional libraries follow
 if test $mpi = true ; then

src/core/PlumedMain.cpp

@@ -1196,6 +1196,10 @@ unsigned PlumedMain::useCountReferenceCounter() const noexcept {
 // This is here to stop cppcheck throwing an error
 #endif
 
+#ifdef __PLUMED_HAS_DLADDR
+// This is here to stop cppcheck throwing an error
+#endif
+
 }
 
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////