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# GCC Cheatsheet ## Overview GCC (GNU Compiler Collection) is a collection of programming language compilers, including C, C++, Objective-C, Fortran, Ada, and others. ## Installation - macOS: `xcode-select --install` - Ubuntu/Debian: `sudo apt-get install build-essential` - Windows: [MinGW-w64](http://mingw-w64.org/doku.php) or [Cygwin](https://www.cygwin.com/) ## Basic Usage
gcc file.c -o file
Compiles `file.c` and creates an executable named `file`. ## Flags - `-c`: Compiles source files to object files without linking. - `-o`: Specifies the name of the output file. - `-Wall`: Enables all warning messages. - `-Werror`: Treats all warnings as errors. - `-g`: Adds debugging information to the executable. - `-O`: Enables optimization of the code. - `-std`: Specifies the language standard to use. - `-I`: Adds a directory to the include path. - `-L`: Adds a directory to the library path. - `-l`: Links against a library. ## Examples
gcc -c file.c -o file.o # Compile source file to object file
gcc file.o -o file # Link object file to create executable
gcc -Wall -Werror -g file.c -o file # Compile with warnings and debugging information
gcc -O2 file.c -o file # Compile with optimization
gcc -std=c99 file.c -o file # Compile with C99 standard
gcc -I include/ file.c -o file # Add include directory to include path
gcc -L lib/ -l mylib file.c -o file # Link against library "mylib"
## Resources - [GCC website](https://gcc.gnu.org/) - [GCC documentation](https://gcc.gnu.org/onlinedocs/) - [GCC Wiki](https://gcc.gnu.org/wiki/)