I'm trying to install gccgo for testing Protocol Buffers 3 with Golang...I have to confess that I'm back to dev after 8 years off (and I'm not a native speaker) so, thank you for your indulgence. Thank you :)

So, After a few readings, I decided to start from the README of this repo: https://github.com/golang/protobuf

1st bullet point: checked!

The last version os the protocol buffer is installed on my Mac ( protobuf-cpp-3.11.4.tar.gzfrom my understanding) https://github.com/protocolbuffers/protobuf/releases/tag/v3.11.4

$ ls $GOBINdlv*           gocode*        godef*         gopkgs*        protoc-gen-go*go-outline*    gocode-gomod*  golint*        goreturns*

2nd bullet point: Here I've spent a couple of hours ... without success :/

Of course, install the Go compiler and tools from https://golang.org/ See https://golang.org/doc/install for details or, if you are using gccgo, follow the instructions at https://golang.org/doc/install/gccgo

My understanding is that I need to install gccgo which is a branch of the gcc compiler. Then I've read that gccgo is just in fact a custom build of the gcc compiler configured with the --enable-languages=c,c++,go option ( src https://golang.org/doc/install/gccgo ) ... so why is there a special branch on the repos and where it is? (https://gcc.gnu.org/git.html) I

I just give up to try to download the gccgo branch from the git repository and find a svn repo:

$ svn checkout svn://gcc.gnu.org/svn/gcc/branches/gccgo gccgo`gccgo$ ./configure --enable-languages=c,c++,go...configure: error: Building GCC requires GMP 4.2+, MPFR 3.1.0+ and MPC 0.8.0+.Try the --with-gmp, --with-mpfr and/or --with-mpc options to specifytheir locations.  Source code for these libraries can be found attheir respective hosting sites as well as at<https://gcc.gnu.org/pub/gcc/infrastructure/>.  See also<http://gcc.gnu.org/install/prerequisites.html> for additional info.  Ifyou obtained GMP, MPFR and/or MPC from a vendor distribution package,make sure that you have installed both the libraries and the headerfiles.  They may be located in separate packages.

So, I downloaded gmp-6.2.0.tar.lz from https://gmplib.org/ which leads me to install lzipbefore untaring the archive

$ brew install lzip$ lunzip gmp-6.2.0.tar.lz$ tar - xvzf gmp-6.2.0.tar$ cd gmp-6.2.0gmp-6.2.0$ ./configuregmp-6.2.0$ makegmp-6.2.0$ make installgmp-6.2.0$ make check ( a few warnings but every test have been passed successfully )

Then, installed mpfr-3.1.6.tar.gz

$ tar -xvzf mpfr-3.1.6.tar.gz$ cd mpfr-3.1.6mpfr-3.1.6$ ./configurempfr-3.1.6$ ./makempfr-3.1.6$ ./make install

... and try again

gccgo$ ./configure --enable-languages=c,c++,go...The following requested languages could not be built: goSupported languages are: c,brig,c,c++,d,fortran,lto,objc,obj-c++

Lastly

I'm not sure about the directory they are talking about in the last step...

Build the Go samples in this directory with "make go". This creates the following executable files in the current directory: add_person_go list_people_go

make works with gcc to introduces a separate file of "rules", that describes how to go from source code to finished program, interprets this file, figures out what needs to be compiled, and calls gcc. ( source https://stackoverflow.com/a/768379/1216281 ). So, if gcc it not compiled properly, it can't work.

protocolbuffer$ lsadd_person.go        add_person_test.go   addressbook.proto    list_people_test.goadd_person.go.txt    addressbook.pb.go    list_people.goprotocolbuffer$ make gomake: *** No rule to make target `go'.  Stop.

Extra tech. infos if neeeded :

~$ echo $GOPATH/Users/me/Dev/Go/golib:/Users/me/Dev/Go/code

$GOBIN is /Users/me/Dev/Go/golib/bin$ echo $GOBIN/Users/me/Dev/Go/golib/bin