Use the source code package in Mac OS X 10.10.3 to compile and install GCC5.1

Use the source code package in Mac OS X 10.10.3 to compile and install GCC5.1

Use the source code package in Mac OS X 10.10.3 to compile and install GCC5.1

1. First download the gcc5.1 source package: https://gcc.gnu.org/

2. installation:

. /Configure (you can set the installation directory here and store all the files in one directory. It will be convenient to search for or delete them later. For example: My location :. /configure -- prefix =/usr/local/gcc5.1 _ source)

The gcc5.1 _ source directory needs to be created in advance.

Make (about 4 hours)

Make install

3. By default, gcc is soft-linked to the clang compiler in the built-in Mac system, instead of the real gcc. You can see through the following command:

Ls-al $ (dirname $ (which gcc) | grep 'gcc \ | g ++ \ | c ++'

Go to/usr/bin/and delete all old commands, because these commands are the old command links:
1. Switch to the root account: sudo su-
2. rm/usr/bin/gcc
Rm/usr/bin/g ++
Rm/usr/bin/c ++
Rm/usr/bin/cpp
Rm/usr/bin/cc

3. Enter/usr/local/gcc5.1 _ source/bin.

Check whether the following executable programs exist in the directory:
/Usr/local/gcc5.1 _ source/bin gcc

/Usr/local/gcc5.1 _ source/bin g ++

/Usr/local/gcc5.1 _ source/bin c ++

/Usr/local/gcc5.1 _ source/bin cc

4. Go to the usr/bin directory and add the soft link:

Ln-s/usr/local/gcc5.1 _ source/bin/gcc

Ln-s/usr/local/gcc5.1 _ source/bin/g ++

Ln-s/usr/local/gcc5.1 _ source/bin/c ++

Ln-s/usr/local/gcc5.1 _ source/bin/cc

 

4. Use the root account to use vi (vim) to open the/etc/profile configuration file and add the library file path of gcc5.1:

1. Switch to the root account.
2. vim/etc/profile
3. Add the following two sentences in the PATH:
/Usr/local/gcc5.1 _ source/lib

/Usr/local/gcc5.1 _ source/bin

My PATH is like this:
Export PATH =/usr/bin:/usr/sbin:/usr/local/bin:/usr/X11/bin:/. out/bin:/usr/local/cellar/mariadb/10.0.17/bin/mysql/bin:/usr/local/cellar/mariadb/10.0.17/bin/mysqld/bin: /usr/local/gcc5.1 _ source/bin:/usr/local/gcc5.1 _ source/lib/bin:

5. Then source/etc/profile.
6. View and compile the. c/. cpp file.

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