[petsc-users] Installation issue of 3.18.* and 3.19.0 on Apple systems

Satish Balay balay at mcs.anl.gov
Wed Apr 5 16:58:43 CDT 2023 

Ah - my patch was buggy.

> +        except RuntimeError:

should be: 'except:' i.e:

diff --git a/config/BuildSystem/config/setCompilers.py b/config/BuildSystem/config/setCompilers.py
index 57848e736e3..e191c1e1b4d 100644
--- a/config/BuildSystem/config/setCompilers.py
+++ b/config/BuildSystem/config/setCompilers.py
@@ -630,10 +630,14 @@ class Configure(config.base.Configure):
         if log: log.write('Detected Darwin')
         isDarwin_value = True
         import platform
-        v = tuple([int(a) for a in platform.mac_ver()[0].split('.')])
-        if v >= (10,15,0):
-          if log: log.write('Detected Darwin/MacOSX Catalina OS\n')
-          isDarwinCatalina_value = True
+        try:
+          v = tuple([int(a) for a in platform.mac_ver()[0].split('.')])
+          if v >= (10,15,0):
+            if log: log.write('Detected Darwin/MacOSX Catalina OS\n')
+            isDarwinCatalina_value = True
+        except:
+          if log: log.write('MacOS version detecton failed!\n')
+          pass
       if output.find('freebsd') >= 0:
         if log: log.write('Detected FreeBSD')
         isFreeBSD_value = True

Satish




On Wed, 5 Apr 2023, Kaus, Boris wrote:

> Perhaps python is broken, or perhaps this is because it is not a real Mac OS, but an emulated one.
> 
> Seems a similar error now occurs a bit down the line:
> 
> ---
> 
> sandbox:${WORKSPACE}/srcdir/petsc-3.18.0 #  ./configure --prefix=/workspace/destdir/lib/petsc/double_real_Int32/
> *******************************************************************************
>     TypeError or ValueError possibly related to ERROR in COMMAND LINE ARGUMENT while running ./configure
> -------------------------------------------------------------------------------
> invalid literal for int() with base 10: ''
> *******************************************************************************
> 
> 
>   File "/workspace/srcdir/petsc-3.18.0/config/configure.py", line 457, in petsc_configure
>     framework = config.framework.Framework(['--configModules=PETSc.Configure','--optionsModule=config.compilerOptions']+sys.argv[1:], loadArgDB = 0)
>   File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/framework.py", line 101, in __init__
>     self.createChildren()
>   File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/framework.py", line 338, in createChildren
>     self.getChild(moduleName)
>   File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/framework.py", line 323, in getChild
>     config.setupDependencies(self)
>   File "/workspace/srcdir/petsc-3.18.0/config/PETSc/Configure.py", line 89, in setupDependencies
>     self.registerPythonFile(utility,'config.utilities')
>   File "/workspace/srcdir/petsc-3.18.0/config/PETSc/Configure.py", line 49, in registerPythonFile
>     utilityObj                             = self.framework.require(directory+utilityName, self)
>   File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/framework.py", line 343, in require
>     config = self.getChild(moduleName, keywordArgs)
>   File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/framework.py", line 317, in getChild
>     config = type(self, *keywordArgs)
>   File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/utilities/macosFirewall.py", line 12, in __init__
>     self.isDarwin = config.setCompilers.Configure.isDarwin(self.log)
>   File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/setCompilers.py", line 668, in isDarwin
>     if not isUname_value: config.setCompilers.Configure.isUname(log)
>   File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/setCompilers.py", line 631, in isUname
>     v = tuple([int(a) for a in platform.mac_ver()[0].split('.')])
>   File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/setCompilers.py", line 631, in <listcomp>
>     v = tuple([int(a) for a in platform.mac_ver()[0].split('.')])
> 
> 
> 
> 
> 
> On 5. Apr 2023, at 23:11, Satish Balay <balay at mcs.anl.gov> wrote:
> 
> Hm - broken python? Either way configure should not fail. Perhaps the following fix:
> 
> Satish
> 
> ---
> 
> diff --git a/config/BuildSystem/config/setCompilers.py b/config/BuildSystem/config/setCompilers.py
> index e4d13bea58f..ae53d1e397e 100644
> --- a/config/BuildSystem/config/setCompilers.py
> +++ b/config/BuildSystem/config/setCompilers.py
> @@ -626,10 +626,14 @@ class Configure(config.base.Configure):
>         if log: log.write('Detected Darwin')
>         isDarwin_value = True
>         import platform
> -        v = tuple([int(a) for a in platform.mac_ver()[0].split('.')])
> -        if v >= (10,15,0):
> -          if log: log.write('Detected Darwin/MacOSX Catalina OS\n')
> -          isDarwinCatalina_value = True
> +        try:
> +          v = tuple([int(a) for a in platform.mac_ver()[0].split('.')])
> +          if v >= (10,15,0):
> +            if log: log.write('Detected Darwin/MacOSX Catalina OS\n')
> +            isDarwinCatalina_value = True
> +        except RuntimeError:
> +          if log: log.write('MacOS version detecton failed!\n')
> +          pass
>       if output.find('freebsd') >= 0:
>         if log: log.write('Detected FreeBSD')
>         isFreeBSD_value = True
> 
> On Wed, 5 Apr 2023, Kaus, Boris wrote:
> 
> That indeed seems to be the issue:
> 
> sandbox:${WORKSPACE}/srcdir/petsc-3.18.0 # python3
> Python 3.9.7 (default, Nov 24 2021, 21:15:59)
> [GCC 10.3.1 20211027] on linux
> Type "help", "copyright", "credits" or "license" for more information.
> import platform
> platform.mac_ver()
> ('', ('', '', ''), '')
> platform.mac_ver()[0].split('.')
> ['']
> tuple([int(a) for a in platform.mac_ver()[0].split('.')])
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
>  File "<stdin>", line 1, in <listcomp>
> ValueError: invalid literal for int() with base 10: ‘'
> 
> 
> On 5. Apr 2023, at 23:00, Satish Balay <balay at mcs.anl.gov> wrote:
> 
> Sorry, Was looking at the wrong place.
> 
> v = tuple([int(a) for a in platform.mac_ver()[0].split('.')])
> 
> Can you try:
> 
> balay at ypro petsc % python3
> Python 3.9.6 (default, Mar 10 2023, 20:16:38)
> [Clang 14.0.3 (clang-1403.0.22.14.1)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> import platform
> platform.mac_ver()
> ('13.3', ('', '', ''), 'x86_64')
> platform.mac_ver()[0].split('.')
> ['13', '3']
> tuple([int(a) for a in platform.mac_ver()[0].split('.')])
> (13, 3)
> 
> 
> 
> Satish
> 
> 
> 
> 
> On Wed, 5 Apr 2023, Kaus, Boris wrote:
> 
> Don’t think so:
> 
> sandbox:${WORKSPACE}/srcdir/petsc-3.18.0 # env
> _=/usr/bin/env
> VERBOSE=true
> BUILD_LD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ld
> OLDPWD=/workspace/srcdir/petsc-3.18.0
> host_libdir=/workspace/x86_64-linux-musl-cxx11/destdir/lib
> nproc=8
> target=aarch64-apple-darwin20
> bindir=/workspace/destdir/bin
> CC=cc
> READELF_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-readelf
> host_bindir=/workspace/x86_64-linux-musl-cxx11/destdir/bin
> PATH=/opt/bin/aarch64-apple-darwin20-libgfortran5-cxx11-mpi+openmpi:/opt/aarch64-apple-darwin20/bin:/opt/bin/x86_64-linux-musl-cxx11:/opt/x86_64-linux-musl/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/workspace/x86_64-linux-musl-cxx11/destdir/bin:/workspace/destdir/bin
> nbits=64
> BUILD_STRIP=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-strip
> BUILD_OBJDUMP=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-objdump
> CMAKE_TARGET_TOOLCHAIN=/opt/toolchains/aarch64-apple-darwin20-libgfortran5-cxx11-mpi+openmpi/target_aarch64-apple-darwin20.cmake
> FC_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-gfortran
> FC=gfortran
> SRC_NAME=PETSc
> RANLIB_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ranlib
> CC_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-gcc
> PS1=\[\]sandbox\[\]:\[\]${PWD//$WORKSPACE/$\{WORKSPACE\}}\[\] \$
> PKG_CONFIG_SYSROOT_DIR=/workspace/destdir
> LD_LIBRARY_PATH=/usr/lib/csl-musl-x86_64:/usr/local/lib64:/usr/local/lib:/usr/lib64:/usr/lib:/lib64:/lib:/workspace/x86_64-linux-musl-cxx11/destdir/lib:/opt/x86_64-linux-musl/x86_64-linux-musl/lib64:/opt/x86_64-linux-musl/x86_64-linux-musl/lib:/opt/aarch64-apple-darwin20/aarch64-apple-darwin20/lib:/opt/aarch64-apple-darwin20/lib:/workspace/destdir/lib64:/workspace/destdir/lib
> HOSTOBJCOPY=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-objcopy
> HOSTOBJDUMP=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-objdump
> LIPO_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-lipo
> HOSTSTRIP=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-strip
> BUILD_OBJCOPY=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-objcopy
> ZERO_AR_DATE=1
> dlext=dylib
> HIDDEN_PS1=\[\]sandbox\[\]:\[\]${PWD//$WORKSPACE/$\{WORKSPACE\}}\[\] \$
> CCACHE_COMPILERCHECK=content
> AR_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ar
> HOSTDSYMUTIL=dsymutil
> SHLVL=1
> OBJDUMP_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-objdump
> CXX_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-g++
> HOSTCXX=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-g++
> USER=kausb
> BUILD_DSYMUTIL=dsymutil
> CC_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-gcc
> OBJCOPY_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-objcopy
> TERM=screen
> LIPO_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-lipo
> BUILD_LIPO=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-lipo
> NM_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-nm
> host_prefix=/workspace/x86_64-linux-musl-cxx11/destdir
> FC_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-gfortran
> AR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ar
> WORKSPACE=/workspace
> STRIP_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-strip
> HOSTRANLIB=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ranlib
> RANLIB_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ranlib
> DSYMUTIL_FOR_BUILD=dsymutil
> HOSTAS=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-as
> HOSTAR=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ar
> BUILD_RANLIB=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ranlib
> NM_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-nm
> LD=/opt/bin/aarch64-apple-darwin20-libgfortran5-cxx11-mpi+openmpi/ld
> HOSTLD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ld
> bb_full_target=aarch64-apple-darwin20-libgfortran5-cxx11-mpi+openmpi
> LLVM_TARGET=aarch64-apple-darwin20
> BUILD_READELF=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-readelf
> CXX_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-g++
> libdir=/workspace/destdir/lib
> MESON_TARGET_TOOLCHAIN=/opt/toolchains/aarch64-apple-darwin20-libgfortran5-cxx11-mpi+openmpi/target_aarch64-apple-darwin20.meson
> LLVM_HOST_TARGET=x86_64-linux-musl
> STRIP_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-strip
> AS_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-as
> HISTFILE=/meta/.bash_history
> HOME=/root
> HOSTLIPO=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-lipo
> includedir=/workspace/destdir/include
> MESON_HOST_TOOLCHAIN=/opt/toolchains/x86_64-linux-musl-cxx11/host_x86_64-linux-musl.meson
> BUILD_FC=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-gfortran
> V=true
> BUILD_CC=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-gcc
> HOSTCC=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-gcc
> AS_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-as
> CXX=c++
> rust_target=aarch64-apple-darwin
> rust_host=x86_64-unknown-linux-musl
> HOSTFC=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-gfortran
> exeext=
> READELF_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-readelf
> bb_target=aarch64-apple-darwin20
> SOURCE_DATE_EPOCH=0
> PWD=/workspace/srcdir/petsc-3.18.0
> MACOSX_DEPLOYMENT_TARGET=11.0
> proc_family=arm
> BUILD_NM=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-nm
> BUILD_CXX=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-g++
> LD_FOR_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ld
> OBJDUMP_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-objdump
> OBJCOPY_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-objcopy
> HOSTNM=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-nm
> USE_CCACHE=false
> BUILD_AR=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ar
> BUILD_AS=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-as
> prefix=/workspace/destdir
> HOSTNAME=271f88c24b60
> CHARSET=UTF-8
> PKG_CONFIG_PATH=/workspace/destdir/lib/pkgconfig:/workspace/destdir/lib64/pkgconfig:/workspace/destdir/share/pkgconfig
> MACHTYPE=x86_64-linux-musl
> HOSTREADELF=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-readelf
> DSYMUTIL_BUILD=dsymutil
> LD_BUILD=/opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-ld
> host_includedir=/workspace/x86_64-linux-musl-cxx11/destdir/include
> CMAKE_HOST_TOOLCHAIN=/opt/toolchains/x86_64-linux-musl-cxx11/host_x86_64-linux-musl.cmake
> SHELL=/bin/bash
> 
> 
> On 5. Apr 2023, at 22:45, Satish Balay <balay at mcs.anl.gov> wrote:
> 
> Well this doesn't trigger the error for me. Do you have any env variables set with unicode [non-ascii] chars?
> 
> Satish
> 
> ---
> 
> balay at ypro petsc-3.19.0 % sw_vers
> ProductName: macOS
> ProductVersion: 13.3
> BuildVersion: 22E252
> balay at ypro petsc-3.19.0 % ./configure --with-mpi=0 --prefix=/workspace/destdir/lib/petsc/double_real_Int32/
> =============================================================================================
>                       Configuring PETSc to compile on your system
> =============================================================================================
> =============================================================================================
>                                   ***** WARNING *****
> You have a version of GNU make older than 4.0. It will work, but may not support all the
> parallel testing options. You can install the latest GNU make with your package manager,
> such as Brew or MacPorts, or use the --download-make option to get the latest GNU make
> =============================================================================================
> Compilers:
> C Compiler:         gcc  -fPIC -Wall -Wwrite-strings -Wno-unknown-pragmas -fstack-protector -fno-stack-check -Qunused-arguments -fvisibility=hidden -g3 -O0
>  Version: Apple clang version 14.0.3 (clang-1403.0.22.14.1)
> ...
> ...
> 
> 
> On Wed, 5 Apr 2023, Kaus, Boris wrote:
> 
> It can be reproduced with this:
> sandbox:${WORKSPACE}/srcdir/petsc-3.18.0 # ./configure --prefix=/workspace/destdir/lib/petsc/double_real_Int32/
> *******************************************************************************
>  TypeError or ValueError possibly related to ERROR in COMMAND LINE ARGUMENT while running ./configure
> -------------------------------------------------------------------------------
> invalid literal for int() with base 10: ''
> *******************************************************************************
> 
> 
> File "/workspace/srcdir/petsc-3.18.0/config/configure.py", line 457, in petsc_configure
>  framework = config.framework.Framework(['--configModules=PETSc.Configure','--optionsModule=config.compilerOptions']+sys.argv[1:], loadArgDB = 0)
> File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/framework.py", line 101, in __init__
>  self.createChildren()
> File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/framework.py", line 338, in createChildren
>  self.getChild(moduleName)
> File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/framework.py", line 323, in getChild
>  config.setupDependencies(self)
> File "/workspace/srcdir/petsc-3.18.0/config/PETSc/Configure.py", line 89, in setupDependencies
>  self.registerPythonFile(utility,'config.utilities')
> File "/workspace/srcdir/petsc-3.18.0/config/PETSc/Configure.py", line 49, in registerPythonFile
>  utilityObj                             = self.framework.require(directory+utilityName, self)
> File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/framework.py", line 343, in require
>  config = self.getChild(moduleName, keywordArgs)
> File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/framework.py", line 317, in getChild
>  config = type(self, *keywordArgs)
> File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/utilities/macosFirewall.py", line 12, in __init__
>  self.isDarwin = config.setCompilers.Configure.isDarwin(self.log)
> File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/setCompilers.py", line 664, in isDarwin
>  if not isUname_value: config.setCompilers.Configure.isUname(log)
> File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/setCompilers.py", line 630, in isUname
>  v = tuple([int(a) for a in platform.mac_ver()[0].split('.')])
> File "/workspace/srcdir/petsc-3.18.0/config/BuildSystem/config/setCompilers.py", line 630, in <listcomp>
>  v = tuple([int(a) for a in platform.mac_ver()[0].split('.')])
> 
> 
> On 5. Apr 2023, at 22:32, Stefano Zampini <stefano.zampini at gmail.com> wrote:
> 
> It seems there's some typo/error in the configure command that is being executed. Can you post it here?
> 
> Il giorno mer 5 apr 2023 alle ore 23:18 Kaus, Boris <kaus at uni-mainz.de<mailto:kaus at uni-mainz.de><mailto:kaus at uni-mainz.de><mailto:kaus at uni-mainz.de><mailto:kaus at uni-mainz.de>> ha scritto:
> Hi everyone,
> 
> I’m trying to install precompiled binaries for PETSc 3.18.5 & 3.19.0 using the BinaryBuilder cross-compilation:
> https://github.com/JuliaPackaging/Yggdrasil/pull/6533, which mostly works fine: https://buildkite.com/julialang/yggdrasil/builds/2093).
> 
> Yet, on apple systems I receive a somewhat weird bug during the configure step:
> 
> [22:08:49] *******************************************************************************
> [22:08:49]     TypeError or ValueError possibly related to ERROR in COMMAND LINE ARGUMENT while running ./configure
> [22:08:49] -------------------------------------------------------------------------------
> [22:08:49] invalid literal for int() with base 10: ''
> [22:08:49] *******************************************************************************
> [22:08:49]
> [22:08:49]
> [22:08:49] /workspace/srcdir/petsc-3.18.0/lib/petsc/conf/rules:860: /workspace/srcdir/petsc-3.18.0//lib/petsc/conf/petscrules: No such file or directory
> [22:08:49] make[1]: *** No rule to make target '/workspace/srcdir/petsc-3.18.0//lib/petsc/conf/petscrules'.  Stop.
> [22:08:49] /workspace/srcdir/petsc-3.18.0/lib/petsc/conf/rules:860: /workspace/srcdir/petsc-3.18.0//lib/petsc/conf/petscrules: No such file or directory
> [22:08:49] make[1]: *** No rule to make target '/workspace/srcdir/petsc-3.18.0//lib/petsc/conf/petscrules'.  Stop.
> [22:08:49] make: *** [GNUmakefile:17: /workspace/srcdir/petsc-3.18.0//lib/petsc/conf/petscvariables] Error 2
> [22:08:49] make: *** Waiting for unfinished jobs....
> [22:08:49] make: *** [GNUmakefile:17: lib/petsc/conf/petscvariables] Error 2
> 
> The log file is rather brief:
> 
> sandbox:${WORKSPACE}/srcdir/petsc-3.18.0 # more configure.log
> Executing: uname -s
> stdout: Darwin
> 
> It works fine for PETSc 3.16.5/3.17.5, and this first occurs in 3.18.0.
> Is there something that changed between 3.17 & 3.18 that could cause this?
> 
> The build system seems to use python3.9 (3.4+ as required)
> 
> Thanks!
> Boris
> 
> 
> 
> 
> 
> 
> --
> Stefano
> 
>

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