Preprocess and compile C and C++ source files, then assemble and link them together. More information: https://gcc.gnu.org.
gcc path/to/source1.c path/to/source2.c ... -o path/to/output_executable
gcc path/to/source.c -Wall -g -Og -o path/to/output_executable
gcc path/to/source.c -o path/to/output_executable -Ipath/to/header -Lpath/to/library -llibrary_name
gcc -S path/to/source.c
gcc -c path/to/source.c
gcc path/to/source.c -O1|2|3|fast -o path/to/output_executable