Linux in a Nutshell, Third Edition

Name

gcc

Synopsis

gcc [options] files

Description

Compile one or more C source files (file.c), assembler source files (file.s), or preprocessed C source files (file.i). If the file suffix is not recognizable, assume that the file is an object file or library. gcc automatically invokes the link editor ld (unless -c, -S, or -E is supplied). In some cases, gcc generates an object file having a .o suffix and a corresponding root name. By default, output is placed in a.out. gcc accepts many system-specific options not covered here.

Note: gcc is the GNU form of cc; on most Linux systems, the command cc will invoke gcc. The command g++ will invoke gcc with the appropriate options for interpreting C++.

Options

-a

Provide profile information for basic blocks.

-ansi

Enforce full ANSI conformance.

-b machine

Compile for use on machine type.

-c

Create linkable object file for each source file, but do not call linker.

-dD

Print #defines.

-dM

Suppress normal output. Print series of #defines that are in effect at the end of preprocessing.

-dN

Print #defines with macro names only, not arguments or values.

-fno-asm

Do not recognize asm, inline, or typeof as keywords. Implied by -ansi.

-fno-builtin

Do not recognize built-in functions unless they begin with two underscores.

-fno-gnu-keywords

Do not recognize classof, headof, signature, sigof, or typeof as keywords.

-fno-ident

Do not respond to #ident commands.

-fsigned-bitfields , -funsigned-bitfields , -fno-signed-bitfields , -fno-unsigned-bitfields ...