Log in to the GCC download page:
https://gcc.gnu.org/Click on the Mirrors in the Download section on the right
Select a suitable mirror address
Select releases/
Scroll down to find and enter the gcc-15.2.0/ directory
Click to download gcc-15.2.0.tar.xz (or gcc-15.2.0.tar.gz)
Upload the gcc-15.2.0.tar.xz file to the server
$ ls gcc-15.2.0.tar.xzUse the following command to extract the .tar.xz file, and wait patiently for the extraction to complete
$ tar -xvJf gcc-15.2.0.tar.xzEnter the extracted gcc-15.2.0 directory
$ cd gcc-15.2.0If the server is connected to the internet, execute
$ ./contrib/download_prerequisitesThis will automatically download the required dependencies
If the server cannot connect to the internet, enter the contrib directory to check the required dependencies
$ cd contrib$ cat download_prerequisitesYou will see the following required dependencies
gmp='gmp-6.2.1.tar.bz2'mpfr='mpfr-4.1.0.tar.bz2'mpc='mpc-1.2.1.tar.gz'isl='isl-0.24.tar.bz2'gettext='gettext-0.22.tar.gz'Log in to the gmp-6.2.1.tar.bz2 download page
https://gmplib.org/list-archives/gmp-announce/2020-November/000049.htmlClick to download the gmp-6.2.1.tar.bz2 file
Log in to the mpfr-4.1.0.tar.bz2 download page
https://www.mpfr.org/mpfr-4.1.0/Click to download the mpfr-4.1.0.tar.bz2 file
Log in to the mpc-1.2.1.tar.gz download page
https://www.multiprecision.org/mpc/download.htmlClick to download the mpc-1.2.1.tar.gz file
Log in to the isl-0.24.tar.bz2 download page
https://libisl.sourceforge.io/Scroll down to find the isl-0.24.tar.bz2 file and click to download
Log in to the gettext-0.22.tar.gz download page
https://ftp.gnu.org/pub/gnu/gettext/Scroll down to find the gettext-0.22.tar.gz file and click to download
Upload gmp-6.2.1.tar.bz2, mpfr-4.1.0.tar.bz2, mpc-1.2.1.tar.gz, isl-0.24.tar.bz2, gettext-0.22.tar.gz to the extracted gcc-15.2.0 directory
$ ls
Extract the above files respectively
$ tar -jxvf gmp-6.2.1.tar.bz2$ tar -jxvf mpfr-4.1.0.tar.bz2$ tar -zxvf mpc-1.2.1.tar.gz$ tar -jxvf isl-0.24.tar.bz2$ tar -zxvf gettext-0.22.tar.gzCreate symbolic links and check
$ ln -sf gmp-6.2.1 gmp$ ln -sf mpfr-4.1.0 mpfr$ ln -sf mpc-1.2.1 mpc$ ln -sf isl-0.24 isl$ ln -sf gettext-0.22 gettext$ ls -l gmp mpfr mpc isl gettextYou can see the directories pointed to by the symbolic links
Configure the compilation directory
$ ./configure --prefix=/home/username/apps/gcc-15.2.0Or configure according to actual needs, such as
$ ./configure --prefix=/home/username/apps/gcc-15.2.0 --disable-multilib --enable-languages=c,c++,fortranStart compiling, be patient, and wait for the compilation to complete
$ make && make installYou can also use multiple cores for compilation
$ make -j4$ make installAfter installation, set the environment variables
export GCC_HOME=~/apps/gcc-15.2.0export PATH=$GCC_HOME/bin:$PATHexport LD_LIBRARY_PATH=$GCC_HOME/lib64:$LD_LIBRARY_PATHexport C_INCLUDE_PATH=$GCC_HOME/include:$C_INCLUDE_PATHexport CPLUS_INCLUDE_PATH=$GCC_HOME/include:$CPLUS_INCLUDE_PATHexport LIBRARY_PATH=$GCC_HOME/lib64:$LIBRARY_PATHUse the following command to check if the GCC compilation directory and version are correct
$ which gcc/home/username/apps/gcc-15.2.0/bin/gcc$ gcc --versiongcc (GCC) 15.2.0Copyright (C) 2025 Free Software Foundation, Inc.This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.$ which g++/home/username/apps/gcc-15.2.0/bin/g++$ g++ --versiong++ (GCC) 15.2.0Copyright (C) 2025 Free Software Foundation, Inc.This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.You can also create a check_gcc.sh script to test whether gcc has been successfully compiled and installed in the specified directory, while testing if C, C++, and Fortran can run successfully
#!/bin/bash
# This script checks if GCC has been successfully compiled and installed in the specified directory.# It verifies the existence of binaries, their executability, version matching, and performs a simple compilation test.# Usage: chmod u+x check_gcc.sh; ./check_gcc.sh# Author: Theoretical Computing Classroom# E-mail: [email protected]# Date: 2025-08-26
# Set the gcc compilation directoryGCC_INSTALL_DIR="$HOME/apps/gcc/gcc-15.2.0"
# Set the expected gcc versionEXPECTED_VERSION="15.2.0"
GCC_BIN="$GCC_INSTALL_DIR/bin/gcc"GXX_BIN="$GCC_INSTALL_DIR/bin/g++"GFORTRAN_BIN="$GCC_INSTALL_DIR/bin/gfortran"GOBJC_BIN="$GCC_INSTALL_DIR/bin/gobjc"
error_exit() { echo "Error: $1" >&2 exit 1}
if [ ! -d "$GCC_INSTALL_DIR" ]; then error_exit "gcc installation directory does not exist: $GCC_INSTALL_DIR"fi
if [ ! -f "$GCC_BIN" ]; then error_exit "gcc binary file not found: $GCC_BIN"fi
if [ ! -f "$GXX_BIN" ]; then error_exit "g++ binary file not found: $GXX_BIN"fi
if [ ! -f "$GFORTRAN_BIN" ]; then error_exit "gfortran binary file not found: $GFORTRAN_BIN"fi
if [ ! -x "$GCC_BIN" ]; then error_exit "gcc binary file is not executable: $GCC_BIN"fi
if [ ! -x "$GXX_BIN" ]; then error_exit "g++ binary file is not executable: $GXX_BIN"fi
if [ ! -x "$GFORTRAN_BIN" ]; then error_exit "gfortran binary file is not executable: $GFORTRAN_BIN"fi
ACTUAL_VERSION="$($GCC_BIN -dumpversion 2>/dev/null)"if [ $? -ne 0 ]; then error_exit "Unable to get gcc version information (may not be compiled correctly)"fi
if [ "$ACTUAL_VERSION" = "$EXPECTED_VERSION" ]; then echo "gcc $ACTUAL_VERSION has been successfully compiled and installed in the specified directory."else error_exit "Version mismatch! Compiled: $EXPECTED_VERSION, Actual: $ACTUAL_VERSION"fi
TEMP_DIR=$(mktemp -d)cd "$TEMP_DIR" || error_exit "Unable to enter temporary directory"
echo "Testing C compiler..."cat > test.c << 'EOF'#include <stdio.h>int main() { printf("Hello from gcc %s\n", __VERSION__); return 0;}EOF
if "$GCC_BIN" -o test test.c 2>/dev/null; then ./test echo "C compilation test passed!"else error_exit "C compilation test failed!"fi
echo "Testing C++ compiler..."cat > test.cpp << 'EOF'#include <iostream>int main() { std::cout << "Hello from g++ " << __VERSION__ << std::endl; return 0;}EOF
if "$GXX_BIN" -o test_cpp test.cpp 2>/dev/null; then ./test_cpp echo "C++ compilation test passed!"else error_exit "C++ compilation test failed!"fi
echo "Testing Fortran compiler..."cat > test.f90 << 'EOF'program test implicit none print '(a)', 'Hello from gfortran'end program testEOF
if "$GFORTRAN_BIN" -o test_fortran test.f90 2>/dev/null; then ./test_fortran echo "Fortran compilation test passed!"else error_exit "Fortran compilation test failed!"fi
cd /tmp || exit 0rm -rf "$TEMP_DIR"echo "Testing completed!"exit 0Grant executable permissions to the check_gcc.sh script and run the script
$ chmod u+x check_gcc.sh$ ./check_gcc.shYou will get the following output
gcc 15.2.0 has been successfully compiled and installed in the specified directory. Testing C compiler...Hello from gcc 15.2.0C compilation test passed! Testing C++ compiler...Hello from g++ 15.2.0C++ compilation test passed! Testing Fortran compiler...Hello from gfortranFortran compilation test passed! Testing completed!Previous Content
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