Common options for the gcc/g++ command

Common options format for gcc/g++ commands (option interpretation)

-o file specifies the output file name, which is not required when compiling to the target code. If file is not specified, the default file name is a.out.

-C Build target file only, not link

-m486 code optimization for 486.

-o0 is not optimized for processing.

-O or-o1 optimization generates code.

-o2 further optimization.

-o3 is further optimized than-O2, including the inline function.

-W turns off all warnings and does not recommend using this item

-wall allows all useful warnings that GCC can provide, or w (warning) to mark specified warnings

-werror convert all warnings to errors to abort the compilation process when a warning occurs

-MM output a make-compatible related list

-V Displays the commands used in each step of the compilation process

-E only runs the C precompiled compiler.

-shared generate a shared destination file. Typically used when building a shared library.

-static linking static libraries, i.e. performing static links

-lfoo linking a function library named Libfoo

-G contains standard debug information in an executable program

-GGDB contains only GNU debugger in the executable program to make the other up to two is information

-O Optimized compiled code

-on specifies that the level of code optimization is n,o<=n<=3

-ansi supports the standard syntax of Ansi/iso C, removing portions of the GNU syntax extension that conflict with the standard (but this option does not guarantee the generation of ANSI-compatible code) This option will prohibit certain features of GNU C, such as ASM or typeof keywords.

-pedantic allows all warnings listed in the Ansi/iso C standard to be issued

-errors allows all errors listed in the Ansi/iso C standard to be issued

-traditional supports Kernighan & Ritchie C syntax (such as defining functions with legacy syntax); If you don't know what this option means, it doesn't matter.
-idirectory specifies additional header file search paths for directory.

-ldirectory Specifies additional library search paths for directory.

-dfoo=bar defines the preprocessing macro foo at the command line with a value of BAR

-idirname add dirname to the search directory list in the header file

-ldirname adds dirname to the list of search directories in the library file, by default GCC only links the shared library

-DMACRO defines macro macros with the string "1".

-DMACRO=DEFN defines macro macros with the string "DEFN".

-umacro cancels the definition of macro macros.

Compile CPP files with g++ if you compile the C + + source file with GCC, the following option is used:-lstdc++, otherwise, a file compilation with C + + operation will fail.

Common options for the gcc/g++ command