Use the source package to compile the installation under Mac OS X 10.10.3 GCC5.1

1. First go to download gcc5.1 Source package: https://gcc.gnu.org/

2. Installation:

./configure (can be set up here to install the directory, all files are stored in a directory, later whether it is to find or delete is very convenient, eg: my location:./configure–-prefix=/usr/local/gcc5.1_source)

Gcc5.1_source This directory needs to be built in advance.

Make (it takes about 4 hours)

Make install

The 3.MAC comes with a system that uses GCC as a soft link clang compiler instead of true GCC, using the following command to see:

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

Enter/usr/bin/to remove all old commands, because these commands are the old version of the command link:
1. Switch 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

Directory to see if the following executable programs are available:
/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. Enter the Usr/bin directory and add a soft link:

LN–S/USR/LOCAL/GCC5.1_SOURCE/BIN/GCC GCC

ln–s/usr/local/gcc5.1_source/bin/g++ g++

Ln–s/usr/local/gcc5.1_source/bin/c++ C + +

LN–S/USR/LOCAL/GCC5.1_SOURCE/BIN/CC cc

4. Use the root account to open/etc/profile This configuration file with VI (VIM) and add the gcc5.1 library file path:

1. Switch the root account.
2.vim/etc/profile

3. Add these two sentences under path:
/usr/local/gcc5.1_source/lib

/usr/local/gcc5.1_source/bin

My path is this:
Export path=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin/bin:/usr/x11/bin:/a.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/bin:/usr/ Local/gcc5.1_source/lib/bin:

5. Then Source/etc/profile.
6. Review and compile the. c/.cpp file to finish.

Use the source package to compile the installation under Mac OS X 10.10.3 GCC5.1