Using the GNU Compiler Collection (GCC): i386 and x86-64 Windows Options

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#### 3.17.18 i386 and x86-64 Windows Options

These additional options are available for Microsoft Windows targets:

`-mconsole`

  This option specifies that a console application is to be generated, by instructing the linker to set the PE header subsystem type required for console applications. This option is available for Cygwin and MinGW targets and is enabled by default on those targets.

`-mdll`

  This option is available for Cygwin and MinGW targets. It specifies that a DLL—a dynamic link library—is to be generated, enabling the selection of the required runtime startup object and entry point.

`-mnop-fun-dllimport`

  This option is available for Cygwin and MinGW targets. It specifies that the `dllimport` attribute should be ignored.

`-mthread`

  This option is available for MinGW targets. It specifies that MinGW-specific thread support is to be used.

`-municode`

  This option is available for MinGW-w64 targets. It causes the `UNICODE` preprocessor macro to be predefined, and chooses Unicode-capable runtime startup code.

`-mwin32`

  This option is available for Cygwin and MinGW targets. It specifies that the typical Microsoft Windows predefined macros are to be set in the pre-processor, but does not influence the choice of runtime library/startup code.

`-mwindows`

  This option is available for Cygwin and MinGW targets. It specifies that a GUI application is to be generated by instructing the linker to set the PE header subsystem type appropriately.

`-fno-set-stack-executable`

  This option is available for MinGW targets. It specifies that the executable flag for the stack used by nested functions isn’t set. This is necessary for binaries running in kernel mode of Microsoft Windows, as there the User32 API, which is used to set executable privileges, isn’t available.

`-fwritable-relocated-rdata`

  This option is available for MinGW and Cygwin targets. It specifies that relocated-data in read-only section is put into .data section. This is a necessary for older runtimes not supporting modification of .rdata sections for pseudo-relocation.

`-mpe-aligned-commons`

  This option is available for Cygwin and MinGW targets. It specifies that the GNU extension to the PE file format that permits the correct alignment of COMMON variables should be used when generating code. It is enabled by default if GCC detects that the target assembler found during configuration supports the feature.

See also under i386 and x86-64 Options for standard options.

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