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What does the '-c' option do in GCC? [closed]

stackoverflow.com › questions › 14724315 › what-does-the-c-option-do-in-gcc

-c

Compile or assemble the source files, but do not link. The linking stage simply is not done. The ultimate output is in the form of an object file for each source file.

By default, the object file name for a source file is made by replacing the suffix .c, .i, .s, etc., with .o. Unrecognized input files, not requiring compilation or assembly, are ignored.

-o file

Place output in file file. This applies regardless to whatever sort of output is being produced, whether it be an executable file, an object file, an assembler file or preprocessed C code. If -o is not specified, the default is to put an executable file in a.out, the object file for source.suffix in source.o, its assembler file in source.s, a precompiled header file in source.suffix.gch, and all preprocessed C source on standard output.

More can be found in GCC Manual Page

Answer from StarPinkER on Stack Overflow

Greenfield Community College

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Academics – Greenfield Community College

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Stack Overflow

stackoverflow.com › questions › 14724315 › what-does-the-c-option-do-in-gcc

What does the '-c' option do in GCC? - Stack Overflow

Top answer

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23

-c

Compile or assemble the source files, but do not link. The linking stage simply is not done. The ultimate output is in the form of an object file for each source file.

By default, the object file name for a source file is made by replacing the suffix .c, .i, .s, etc., with .o. Unrecognized input files, not requiring compilation or assembly, are ignored.

-o file

Place output in file file. This applies regardless to whatever sort of output is being produced, whether it be an executable file, an object file, an assembler file or preprocessed C code. If -o is not specified, the default is to put an executable file in a.out, the object file for source.suffix in source.o, its assembler file in source.s, a precompiled header file in source.suffix.gch, and all preprocessed C source on standard output.

More can be found in GCC Manual Page

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5

From man gcc (section "Options Controlling the Kind of Output"):

...

-c Compile or assemble the source files, but do not link. The linking stage simply is not done. The ultimate output is in the form of an object file for each source file.

By default, the object file name for a source file is made by replacing the suffix .c, .i, .s, etc., with .o.

Unrecognized input files, not requiring compilation or assembly, are ignored.

...

Discussions

Why is GCC the only compiler that cares deeply about C?

Microsoft doesn't care about C. The win32 API is an ANSI C API and Windows programs haven't been written in C regularly since the Windows 3.x era. They lagged behind for a while, not implementing C99, but have since turned around and MSVC is C17 with more or less all the features. They even have a standards-compliant preprocessor now, available with a project setting or switch. It's weird that you have to specifically ask for the compliant preprocessor, but making that the default would break a lot of old projects. But anyway, you can do modern C in MSVC now, they're up to speed. Clang is more or less on par with GCC, and they both represent the state of the art of C. More on reddit.com

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What does the '-c' option do in GCC? [closed]

stackoverflow.com › questions › 14724315 › what-does-the-c-option-do-in-gcc

-c

Compile or assemble the source files, but do not link. The linking stage simply is not done. The ultimate output is in the form of an object file for each source file.

By default, the object file name for a source file is made by replacing the suffix .c, .i, .s, etc., with .o. Unrecognized input files, not requiring compilation or assembly, are ignored.

-o file

Place output in file file. This applies regardless to whatever sort of output is being produced, whether it be an executable file, an object file, an assembler file or preprocessed C code. If -o is not specified, the default is to put an executable file in a.out, the object file for source.suffix in source.o, its assembler file in source.s, a precompiled header file in source.suffix.gch, and all preprocessed C source on standard output.

More can be found in GCC Manual Page

Answer from StarPinkER on Stack Overflow

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My GCC | Welcome to My GCC

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GCC, the GNU Compiler Collection - GNU Project

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reddit.com › r/c_programming › why is gcc the only compiler that cares deeply about c?

r/C_Programming on Reddit: Why is GCC the only compiler that cares deeply about C?

December 22, 2024 -

From what I've seen both Clang and MSVC lack several C features from many different versions, while GCC has almost all of them. This isn't the case with C++ where the three compilers have a very similar amount of features inside their pockets.

This makes me feel like I'm forced to use GCC if I wanna everything in C. Btw, I'm on Windows 10.

Top answer

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196

Microsoft doesn't care about C. The win32 API is an ANSI C API and Windows programs haven't been written in C regularly since the Windows 3.x era. They lagged behind for a while, not implementing C99, but have since turned around and MSVC is C17 with more or less all the features. They even have a standards-compliant preprocessor now, available with a project setting or switch. It's weird that you have to specifically ask for the compliant preprocessor, but making that the default would break a lot of old projects. But anyway, you can do modern C in MSVC now, they're up to speed. Clang is more or less on par with GCC, and they both represent the state of the art of C.

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100

MSVC implements ISO C17, Clang is practically a drop-in replacement for GCC and there are many smaller C compilers as well. If you are looking for GNU extensions not part of the C language, you will obviously find them in GNU GCC.

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