GCC-14.2 Build Process

If you haven’t run the download_prerequisites script, it may result in missing dependencies, which could affect the functionality of the GCC you are building. Here are the steps you can take to resolve this issue:

Step 1: Download Dependencies

1. Navigate to the top-level directory of the GCC source code:
   Make sure you are in the top-level directory of the GCC source code.

   cd /path/to/gcc-X.X.X  # Replace with your actual path

2. Run download_prerequisites:
   Execute the following command in the top-level directory:

   ./contrib/download_prerequisites

Step 2: Build GCC

3. Clean previous builds:
   If there were issues with previous builds, it is recommended to clean the build directory:

   cd ..
   rm -rf build

4. Recreate the build directory:
   Create a new build directory and navigate into it:

   mkdir build
   cd build

5. Reconfigure and build:
   Run the configuration command, then compile:

   ../configure --enable-languages=c,c++ --disable-multilib --prefix=/opt/gcc-14.2.0
   make
   sudo make install

Step 3: Set Priority Levels

# Add gcc
sudo update-alternatives --install /usr/bin/gcc gcc /opt/gcc-14.2.0/bin/gcc 100

# Add g++
sudo update-alternatives --install /usr/bin/g++ g++ /opt/gcc-14.2.0/bin/g++ 100

Step 4: Update link library location

export LD_LIBRARY_PATH=/opt/gcc-14.2.0/lib64:$LD_LIBRARY_PATH