Gcc installation

[octavio dario barahona echeverria]

Hi:

I have some problems with the installation of gcc

My desk machine is a iMac (retina 4k, 21.5-inch, 2017) with procesador 3.6Ghz intel core i7 with Mac OS Sierra high (version 10.13.2); 

the sources are at /Users/octaviodario/Downloads/gcc720;

The building directory is Users/octaviodario/Downloads/gcc720obc;

I) my confiugration command is

sudo /Users/octaviodario/Downloads/gcc720/./configure --prefix=/usr/local --with-local-prefix=/usr/local/include --includedir=/usr/local/include --oldincludedir=/usr/local/include --enable-languages=c,c++,fortran,objc,obj-c++ --enable-stage1-languages=c,c++,fortran,objc,obj-c++c

ii) I I run the make and I get the next error message:

The directory that should contain system headers does not exist:

  /usr/include

make[3]: *** [stmp-fixinc] Error 1

make[2]: *** [all-stage1-gcc] Error 2

make[1]: *** [stage1-bubble] Error 2

make: *** [all] Error 2

I’m asking for help!!!

Kind regards from Cuernavaca, Mexico