Mac mini Catalina Homebrew で gcc をインストール

「jubatus installer」を使うにも、gcc は macOS に入っているやつじゃなくて、新しい方がいいかと考えて、Homebrew 使って「gcc」をインストール。

$ brew install gcc
Updating Homebrew...
==> Auto-updated Homebrew!
Updated 1 tap (homebrew/core).
==> Updated Formulae
ansible deno gcab gupnp libsigc++ snappy
bandwhich ensmallen groovy kepubify libtensorflow solr
bibtexconv exploitdb gssdp libsecret mill wabt
==> Deleted Formulae
lastfmfpclient

==> Installing dependencies for gcc: gmp, isl, mpfr and libmpc
==> Installing gcc dependency: gmp
==> Downloading https://homebrew.bintray.com/bottles/gmp-6.1.2_2.catalina.bottle.1.tar.gz
==> Downloading from https://akamai.bintray.com/24/2409417943fceda33eac12a8229fbf7b990eee18ee341b543be575550a077bb0?__gda__=exp=15
######################################################################## 100.0%
==> Pouring gmp-6.1.2_2.catalina.bottle.1.tar.gz
/usr/local/Cellar/gmp/6.1.2_2: 18 files, 3MB
==> Installing gcc dependency: isl
==> Downloading https://homebrew.bintray.com/bottles/isl-0.22.catalina.bottle.tar.gz
==> Downloading from https://akamai.bintray.com/39/3908e18211bb5e4a76cac2a9ebb9c83dbf3c8cd8138f0e74970ede9802d614fb?__gda__=exp=15
######################################################################## 100.0%
==> Pouring isl-0.22.catalina.bottle.tar.gz
/usr/local/Cellar/isl/0.22: 72 files, 4.7MB
==> Installing gcc dependency: mpfr
==> Downloading https://homebrew.bintray.com/bottles/mpfr-4.0.2.catalina.bottle.tar.gz
==> Downloading from https://akamai.bintray.com/14/140d29bfee0c8cf356fbb5391465f781df559e6076988de3ea8bcfd812f3c5bd?__gda__=exp=15
######################################################################## 100.0%
==> Pouring mpfr-4.0.2.catalina.bottle.tar.gz
/usr/local/Cellar/mpfr/4.0.2: 28 files, 4.7MB
==> Installing gcc dependency: libmpc
==> Downloading https://homebrew.bintray.com/bottles/libmpc-1.1.0.catalina.bottle.tar.gz
######################################################################## 100.0%
==> Pouring libmpc-1.1.0.catalina.bottle.tar.gz
/usr/local/Cellar/libmpc/1.1.0: 12 files, 361.9KB
==> Installing gcc
==> Downloading https://homebrew.bintray.com/bottles/gcc-9.2.0_3.catalina.bottle.tar.gz
==> Downloading from https://akamai.bintray.com/3d/3d1fed93856370b9857e187c11f8cfe43c0df9a05274a2eaabb1a9e5c7fd9605?__gda__=exp=15
######################################################################## 100.0%
==> Pouring gcc-9.2.0_3.catalina.bottle.tar.gz
/usr/local/Cellar/gcc/9.2.0_3: 1,462 files, 287.9MB
$


gcc-9 と g++-9 にリンクを貼っとくといいそうです。
（PATH の設定は、既に /usr/local/bin が /usr/bin より先に書いてあるので、変更無し）

$ cd /usr/local/bin
$ ln -s ../Cellar/gcc/9.2.0_3/bin/gcc-9 gcc
$ ln -s ../Cellar/gcc/9.2.0_3/bin/g++-9 g++