diff --git a/code/CMakeModules/PCHSupport.cmake b/code/CMakeModules/PCHSupport.cmake
index 45e1aa766..f56626da1 100644
--- a/code/CMakeModules/PCHSupport.cmake
+++ b/code/CMakeModules/PCHSupport.cmake
@@ -28,15 +28,12 @@ ELSE()
 ENDIF()
 
 MACRO(APPEND_DEFINITION _NAME _VAL)
-  # value is not empty
-  IF(${_VAL})
-    IF(CMAKE_VERSION VERSION_LESS "2.8.12")
-      # don't support logical expressions, append definition
-      LIST(APPEND ${_NAME} "-D${_VAL}")
-    ELSE()
-      # support logical expressions, use them
-      LIST(APPEND ${_NAME} "$<$<BOOL:${_VAL}>:-D$<JOIN:${_VAL},-D>>")
-    ENDIF()
+  IF(CMAKE_VERSION VERSION_LESS "2.8.12")
+    # don't support logical expressions, append definition
+    LIST(APPEND ${_NAME} "-D${_VAL}")
+  ELSE()
+    # support logical expressions, use them
+    LIST(APPEND ${_NAME} "$<$<BOOL:${_VAL}>:-D$<JOIN:${_VAL},-D>>")
   ENDIF()
 ENDMACRO()
 
@@ -197,7 +194,7 @@ MACRO(PCH_SET_COMPILE_FLAGS _target)
         LIST(APPEND _FLAGS "${item}")
       ENDFOREACH()
     ENDIF()
-    
+
     GET_DIRECTORY_PROPERTY(_DIRECTORY_DEFINITIONS DIRECTORY ${CMAKE_SOURCE_DIR} DEFINITIONS)
 
     IF(_DIRECTORY_DEFINITIONS)
diff --git a/code/CMakeModules/nel.cmake b/code/CMakeModules/nel.cmake
index 08f2f120e..88c1a8538 100644
--- a/code/CMakeModules/nel.cmake
+++ b/code/CMakeModules/nel.cmake
@@ -832,10 +832,17 @@ MACRO(NL_SETUP_BUILD)
         ELSE()
           # Always force -mmacosx-version-min to override environement variable
           IF(CMAKE_OSX_DEPLOYMENT_TARGET)
+            IF(CMAKE_OSX_DEPLOYMENT_TARGET VERSION_LESS "10.7")
+              MESSAGE(FATAL_ERROR "Minimum target for OS X is 10.7 but you're using ${CMAKE_OSX_DEPLOYMENT_TARGET}")
+            ENDIF()
             SET(PLATFORM_LINKFLAGS "${PLATFORM_LINKFLAGS} -Wl,-macosx_version_min,${CMAKE_OSX_DEPLOYMENT_TARGET}")
           ENDIF()
         ENDIF()
 
+        # use libc++ under OX X to be able to use new C++ features (and else it'll use GCC 4.2.1 STL)
+        # minimum target is now OS X 10.7
+        ADD_PLATFORM_FLAGS("-stdlib=libc++")
+        
         SET(PLATFORM_LINKFLAGS "${PLATFORM_LINKFLAGS} -Wl,-headerpad_max_install_names")
 
         IF(HAVE_FLAG_SEARCH_PATHS_FIRST)
@@ -852,6 +859,9 @@ MACRO(NL_SETUP_BUILD)
       ENDIF()
     ENDIF()
 
+    # use c++0x standard to use std::unique_ptr and std::shared_ptr
+    ADD_PLATFORM_FLAGS("-std=c++0x")
+
     ADD_PLATFORM_FLAGS("-D_REENTRANT")
 
     # hardening
diff --git a/code/ryzom/tools/client/ryzom_installer/src/configfile.cpp b/code/ryzom/tools/client/ryzom_installer/src/configfile.cpp
index 592b8e0a2..f76ba4771 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/configfile.cpp
+++ b/code/ryzom/tools/client/ryzom_installer/src/configfile.cpp
@@ -715,8 +715,13 @@ int CConfigFile::compareInstallersVersion() const
 
 	QString newVersion = QApplication::applicationVersion();
 
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))	
 	QVersionNumber installedVer = QVersionNumber::fromString(installedVersion);
 	QVersionNumber newVer = QVersionNumber::fromString(newVersion);
+#else
+	QString installedVer = installedVersion;
+	QString newVer = newVersion;
+#endif
 
 	// same version
 	if (newVer == installedVer) return 0;
diff --git a/dist/snap/snapcraft.yaml b/dist/snap/snapcraft.yaml
index 659a58a7d..7c0bd1813 100644
--- a/dist/snap/snapcraft.yaml
+++ b/dist/snap/snapcraft.yaml
@@ -42,11 +42,14 @@ parts:
         - -DRYZOM_GAMES_PREFIX=bin
     build-packages:
         - zlib1g-dev
-        - libpng-dev
+        - libpng12-dev
         - libjpeg8-dev
         - qttools5-dev-tools
+        - libxml2-dev
+        - libssl-dev
+        - libqt5opengl5-dev
     stage-packages:
         - libqt5widgets5
-        
+        - libqt5opengl5
     after: [desktop-qt5]