RE-POST March: SPO600 Week 7

This post would be about building GCC.

Instructions to Build GCC

git clone git://gcc.gnu.org/git/gcc.git
Create an empty build directory beside the source tree
Go into the build directory as a non-root user.
Run the configure script in the source directory using relative path ../gcc/configure
Add a --prefix=dir option to specify where the software will be installed, plus any other configuration options. The dir should be within the home directory, for example, $HOME/gcc-test-001/
Run the make -jn option to specify the maximum number of parallel jobs that should be executed at one time, where n is between (#of cores + 1) and (2 * #of cores + 1).
Run make install as a non-root user. This should install a subdirectory of prefix directory prefix/bin, prefix/lib64
Add the bin directory to PATH: PATH="prefix/bin:$PATH"

There are 2 ways to build another copy of the same GCC:

Repeat the steps starting at step 2, creating a new build directory or
make clean and repeat steps 4 by running the configure script

Connect to the servers, then create a src directory that will have the GCC compiler:

    mkdir src
    cd src
    git clone git://gcc.gnu.org/git/gcc.git

     mkdir build
    cd build
    ../gcc/configure --prefix=$HOME/gcc-test-001/

Now, in my build directory, I have these files:

In gcc/Makefile.in: less Makefile.in

The @....@ are templates and it indicates that the system needs to run a test to find out what value it should insert there.

Then if we look at the Makefile in build folder: less Makefile

Before doing step 6, run the make clean command. Then just for fun, I will also be running the time command to know how long this program would build:

time make -jn