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g++ — Compile C++ source files. Part of GCC (GNU Compiler Collection). More information: <https://gcc.gnu.

Submitted by: @import:tldr-pages·Mar 2, 2026·

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Problem

How to use the g++ command: Compile C++ source files. Part of GCC (GNU Compiler Collection). More information: <https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Dialect-Options.html>.

Solution

g++ — Compile C++ source files. Part of GCC (GNU Compiler Collection). More information: <https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Dialect-Options.html>.

Compile a source code file into an executable binary:

g++ {{path/to/source1.cpp path/to/source2.cpp ...}} {{[-o|--output]}} {{path/to/output_executable}}

Activate output of all errors and warnings:

g++ {{path/to/source.cpp}} -Wall {{[-o|--output]}} {{path/to/output_executable}}

Show common warnings, debug symbols in output, and optimize without affecting debugging:

g++ {{path/to/source.cpp}} -Wall {{[-g|--debug]}} -Og {{[-o|--output]}} {{path/to/output_executable}}

Choose a language standard to compile for (C++98/C++11/C++14/C++17):

g++ {{path/to/source.cpp}} -std={{c++98|c++11|c++14|c++17}} {{[-o|--output]}} {{path/to/output_executable}}

Include libraries located at a different path than the source file:

g++ {{path/to/source.cpp}} {{[-o|--output]}} {{path/to/output_executable}} -I{{path/to/header}} -L{{path/to/library}} -l{{library_name}}

Compile and link multiple source code files into an executable binary:

g++ {{[-c|--compile]}} {{path/to/source1.cpp path/to/source2.cpp ...}} && g++ {{[-o|--output]}} {{path/to/output_executable}} {{path/to/source1.o path/to/source2.o ...}}

Optimize the compiled program for performance:

g++ {{path/to/source.cpp}} -O{{1|2|3|fast}} {{[-o|--output]}} {{path/to/output_executable}}

Display version:

g++ --version

Code Snippets

Compile a source code file into an executable binary

g++ {{path/to/source1.cpp path/to/source2.cpp ...}} {{[-o|--output]}} {{path/to/output_executable}}

Activate output of all errors and warnings

g++ {{path/to/source.cpp}} -Wall {{[-o|--output]}} {{path/to/output_executable}}

Show common warnings, debug symbols in output, and optimize without affecting debugging

g++ {{path/to/source.cpp}} -Wall {{[-g|--debug]}} -Og {{[-o|--output]}} {{path/to/output_executable}}

Choose a language standard to compile for (C++98/C++11/C++14/C++17)

g++ {{path/to/source.cpp}} -std={{c++98|c++11|c++14|c++17}} {{[-o|--output]}} {{path/to/output_executable}}

Include libraries located at a different path than the source file

g++ {{path/to/source.cpp}} {{[-o|--output]}} {{path/to/output_executable}} -I{{path/to/header}} -L{{path/to/library}} -l{{library_name}}

Context

tldr-pages: common/g++

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