$ brew安装gcc @ 7可疑速度快

Question

我刚刚重新安装了自制软件，并且在今晚之前只运行了$ brew tap homebrew/science。我刚刚运行$ brew install gcc@7 --without-multilib以正确make生物信息学程序trinity-rnaseq，并且它与我过去常常使用$ brew install gcc相比，安装速度异常快。我已经习惯了40-50分钟，但它似乎在大约5分钟内安装了所有依赖项。我想我只是怀疑为什么它只花了正常时间的10％安装，并且想知道是否有人知道有任何方法来测试这个安装是否正常工作。我继续将下面的终端输出连接到下面，以防它对此有所了解。

My-MacBook-Pro:~ username$ brew install gcc@7 --without-multilib ==> Installing dependencies for gcc: gmp, mpfr, libmpc, isl ==> Installing gcc dependency: gmp ==> Downloading https://homebrew.bintray.com/bottles/gmp-6.1.2_1.high_sierra.bot ######################################################################## 100.0% ==> Pouring gmp-6.1.2_1.high_sierra.bottle.tar.gz /usr/local/Cellar/gmp/6.1.2_1: 18 files, 3.1MB ==> Installing gcc dependency: mpfr ==> Downloading https://homebrew.bintray.com/bottles/mpfr-3.1.6.high_sierra.bott ######################################################################## 100.0% ==> Pouring mpfr-3.1.6.high_sierra.bottle.tar.gz /usr/local/Cellar/mpfr/3.1.6: 26 files, 3.6MB ==> Installing gcc dependency: libmpc ==> Downloading https://homebrew.bintray.com/bottles/libmpc-1.0.3_1.high_sierra. ######################################################################## 100.0% ==> Pouring libmpc-1.0.3_1.high_sierra.bottle.tar.gz /usr/local/Cellar/libmpc/1.0.3_1: 12 files, 345.1KB ==> Installing gcc dependency: isl ==> Downloading https://homebrew.bintray.com/bottles/isl-0.18.high_sierra.bottle ######################################################################## 100.0% ==> Pouring isl-0.18.high_sierra.bottle.tar.gz /usr/local/Cellar/isl/0.18: 80 files, 3.8MB Warning: gcc: this formula has no --without-multilib option so it will be ignored! ==> Installing gcc ==> Downloading https://homebrew.bintray.com/bottles/gcc-7.2.0.high_sierra.bottle.tar.gz ######################################################################## 100.0% ==> Pouring gcc-7.2.0.high_sierra.bottle.tar.gz /usr/local/Cellar/gcc/7.2.0: 1,487 files, 284.3MB

当我检查我安装了哪些软件包，以及安装了gcc-7的地方时，一切看起来都很正常。我老实说，太非常熟悉自制软件和gcc，所以对于我在这里公然无知而道歉。

My-MacBook-Pro:~ username$ brew list gcc gmp isl libmpc mpfr

My-MacBook-Pro:~ username$ which gcc-7 /usr/local/bin/gcc-7