Thanks to everyone that provided suggestions.

I was about to follow the recommended step of renaming /usr/local and reinstall 
a bunch of programs.
However, that renaming is blocked, presumably by Apple System Integrity 
Protection. 
Is there any alternative to disabling this Apple "feature"?
Do you recommend to re-instate it after the re-construction of /usr/local/ ?
As you see, I am not familiar with Apple tricks.

Thanks again,

Adelchi
 


> On 20 May 2020, at 05:50, Simon Urbanek <simon.urba...@r-project.org> wrote:
> 
> 
> Adelchi,
> 
> as pointed out you have conflicting libraries in /usr/local - likely from 
> some conflicting package manager. I would recommend re-naming /usr/local to 
> remove the issue and installing a clean GNU Fortran (see 
> http://mac.r-project.org/tools/ or from the official GNU Fortran pages which 
> use the same binary), that's all you really need.
> 
> Cheers,
> Simon
> 
> 
> 
>> On 20/05/2020, at 1:45 AM, Adelchi Azzalini <azzal...@stat.unipd.it> wrote:
>> 
>> Hi. 
>> In essence, my problem is that I cannot install a package which requires 
>> Fortran-77 compilation on my Mac.
>> 
>> More in detail, this is my own package 'mnormt' which exists on CRAN since 
>> 2006; it is currently at version 1.5-7. It has been developed in successive 
>> versions on a Linux machine, where it compiles with no problems. The macOS 
>> and MS-windows versions are created on CRAN, where it passes all pertaining 
>> checks.
>> 
>> Now, in the new pandemic world, I need create a new version of the package, 
>> but working from home, hence using my Mac laptop instead of the Linux 
>> desktop as in the past. Unfortunately, compilation or loading does not work. 
>> If I run 
>> 
>> R CMD check mnormt_1.5-7.tar.gz
>> 
>> first I get a bunch of warning messages such as
>> 
>> Warning: Possible change of value in conversion from REAL(8) to INTEGER(4) 
>> ....  [-Wconversion]
>> Warning: ‘lxchng’ may be used uninitialized in this function 
>> [-Wmaybe-uninitialized]
>> Warning: Label 10 at (1) defined but not used [-Wunused-label]
>> 
>> and finally it crashes with
>> 
>> Error: package or namespace load failed for ‘mnormt’:
>> .onLoad failed in loadNamespace() for 'mnormt', details:
>> call: dyn.load(file, DLLpath = DLLpath, ...)
>> error: unable to load shared object 
>> '/Users/aa/SW-aa/Pkg-mnormt/mnormt.Rcheck/00LOCK-mnormt/00new/mnormt/libs/mnormt.so':
>> dlopen(/Users/aa/SW-aa/Pkg-mnormt/mnormt.Rcheck/00LOCK-mnormt/00new/mnormt/libs/mnormt.so,
>>  6): Symbol not found: ___addtf3
>> Referenced from: /usr/local/lib/libquadmath.0.dylib
>> Expected in: /usr/local/lib/libgcc_s_x86_64.1.dylib
>> in /usr/local/lib/libquadmath.0.dylib
>> Error: loading failed
>> 
>> Needless to say, I have no idea what this "addtf3" is or it should be. There 
>> is no such a symbol in the Fortran code.
>> 
>> I believe to have installed all ingredients indicated at 
>> https://mac.r-project.org/tools/
>> See the list below with details about my system and other installed tools.
>> 
>> Any suggestions for sorting this out?
>> 
>> Adelchi Azzalini
>> 
>> 
>> ---------------------------------------------------
>> Installation info:
>> 
>> R> R.version
>>              _                           
>> platform       x86_64-apple-darwin17.0     
>> arch           x86_64                      
>> os             darwin17.0                  
>> system         x86_64, darwin17.0          
>> status                                     
>> major          4                           
>> minor          0.0                         
>> year           2020                        
>> month          04                          
>> day            24                          
>> svn rev        78286                       
>> language       R                           
>> version.string R version 4.0.0 (2020-04-24)
>> nickname       Arbor Day                   
>> 
>> --- macOS Mojave 10.14.6
>> 
>> --- Xcode version 11.3.1
>> 
>> --- Fortran
>> 
>> [aa@mac-2013:~] gfortran -v
>> Using built-in specs.
>> COLLECT_GCC=gfortran
>> COLLECT_LTO_WRAPPER=/usr/local/gfortran/libexec/gcc/x86_64-apple-darwin18/8.2.0/lto-wrapper
>> Target: x86_64-apple-darwin18
>> Configured with: ../gcc-8.2.0/configure --prefix=/usr/local/gfortran 
>> --with-gmp=/Users/fx/devel/gcc/build_package/deps 
>> --enable-languages=c,c++,fortran,objc,obj-c++ --build=x86_64-apple-darwin18 
>> --disable-multilib --with-native-system-header-dir=/usr/include 
>> --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
>> Thread model: posix
>> gcc version 8.2.0 (GCC) 
>> 
>> [aa@mac-2013:~] echo $PATH
>> .:/Users/aa/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin/:/usr/X11R6/bin:/opt/local/bin:/Library/TeX/texbin:/usr/local/gfortran/bin
>> 
>> -- other tools indicated at https://mac.r-project.org/tools/
>>  xz-5.2.5/  is installed 
>>  PCRE2 10.34 built with --disable-jit 
>>  bzip2 Version 1.0.6 is installed
>> 
>> _______________________________________________
>> R-SIG-Mac mailing list
>> R-SIG-Mac@r-project.org
>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
> 

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