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   gcc    ( 1 )

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Параметры подробно (Options detail)

MSP430

These options are defined for the MSP430:

       -masm-hex
           Force assembly output to always use hex constants.  Normally
           such constants are signed decimals, but this option is
           available for testsuite and/or aesthetic purposes.

       -mmcu=
           Select the MCU to target.  This is used to create a C
           preprocessor symbol based upon the MCU name, converted to
           upper case and pre- and post-fixed with __.  This in turn is
           used by the msp430.h header file to select an MCU-specific
           supplementary header file.

           The option also sets the ISA to use.  If the MCU name is one
           that is known to only support the 430 ISA then that is
           selected, otherwise the 430X ISA is selected.  A generic MCU
           name of msp430 can also be used to select the 430 ISA.
           Similarly the generic msp430x MCU name selects the 430X ISA.

           In addition an MCU-specific linker script is added to the
           linker command line.  The script's name is the name of the
           MCU with .ld appended.  Thus specifying -mmcu=xxx on the gcc
           command line defines the C preprocessor symbol "__XXX__" and
           cause the linker to search for a script called xxx.ld.

           This option is also passed on to the assembler.

       -mwarn-mcu
       -mno-warn-mcu
           This option enables or disables warnings about conflicts
           between the MCU name specified by the -mmcu option and the
           ISA set by the -mcpu option and/or the hardware multiply
           support set by the -mhwmult option.  It also toggles warnings
           about unrecognized MCU names.  This option is on by default.

       -mcpu=
           Specifies the ISA to use.  Accepted values are msp430,
           msp430x and msp430xv2.  This option is deprecated.  The
           -mmcu= option should be used to select the ISA.

       -msim
           Link to the simulator runtime libraries and linker script.
           Overrides any scripts that would be selected by the -mmcu=
           option.

       -mlarge
           Use large-model addressing (20-bit pointers, 32-bit
           "size_t").

       -msmall
           Use small-model addressing (16-bit pointers, 16-bit
           "size_t").

       -mrelax
           This option is passed to the assembler and linker, and allows
           the linker to perform certain optimizations that cannot be
           done until the final link.

       mhwmult=
           Describes the type of hardware multiply supported by the
           target.  Accepted values are none for no hardware multiply,
           16bit for the original 16-bit-only multiply supported by
           early MCUs.  32bit for the 16/32-bit multiply supported by
           later MCUs and f5series for the 16/32-bit multiply supported
           by F5-series MCUs.  A value of auto can also be given.  This
           tells GCC to deduce the hardware multiply support based upon
           the MCU name provided by the -mmcu option.  If no -mmcu
           option is specified or if the MCU name is not recognized then
           no hardware multiply support is assumed.  "auto" is the
           default setting.

           Hardware multiplies are normally performed by calling a
           library routine.  This saves space in the generated code.
           When compiling at -O3 or higher however the hardware
           multiplier is invoked inline.  This makes for bigger, but
           faster code.

           The hardware multiply routines disable interrupts whilst
           running and restore the previous interrupt state when they
           finish.  This makes them safe to use inside interrupt
           handlers as well as in normal code.

       -minrt
           Enable the use of a minimum runtime environment - no static
           initializers or constructors.  This is intended for memory-
           constrained devices.  The compiler includes special symbols
           in some objects that tell the linker and runtime which code
           fragments are required.

       -mcode-region=
       -mdata-region=
           These options tell the compiler where to place functions and
           data that do not have one of the "lower", "upper", "either"
           or "section" attributes.  Possible values are "lower",
           "upper", "either" or "any".  The first three behave like the
           corresponding attribute.  The fourth possible value - "any" -
           is the default.  It leaves placement entirely up to the
           linker script and how it assigns the standard sections
           (".text", ".data", etc) to the memory regions.

       -msilicon-errata=
           This option passes on a request to assembler to enable the
           fixes for the named silicon errata.

       -msilicon-errata-warn=
           This option passes on a request to the assembler to enable
           warning messages when a silicon errata might need to be
           applied.