diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 3138c7d946e..9ce37bbbb44 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -845,6 +845,7 @@ Objective-C and Objective-C++ Dialects}. @emph{MSP430 Options} @gccoptlist{-msim -masm-hex -mmcu= -mcpu= -mlarge -msmall -mrelax @gol +-mwarn-mcu @gol -mcode-region= -mdata-region= @gol -msilicon-errata= -msilicon-errata-warn= @gol -mhwmult= -minrt} @@ -18510,6 +18511,16 @@ cause the linker to search for a script called @file{xxx.ld}. This option is also passed on to the assembler. +@item -mwarn-mcu +@itemx -mno-warn-mcu +@opindex mwarn-mcu +@opindex mno-warn-mcu +This option enables or disables warnings about conflicts between the +MCU name specified by the @option{-mmcu} option and the ISA set by the +@option{-mcpu} option and/or the hardware multiply support set by the +@option{-mhwmult} option. It also toggles warnings about unrecognised +MCU names. This option is on by default. + @item -mcpu= @opindex mcpu= Specifies the ISA to use. Accepted values are @samp{msp430}, @@ -18544,10 +18555,9 @@ for the original 16-bit-only multiply supported by early MCUs. @samp{f5series} for the 16/32-bit multiply supported by F5-series MCUs. A value of @samp{auto} can also be given. This tells GCC to deduce the hardware multiply support based upon the MCU name provided by the -@option{-mmcu} option. If no @option{-mmcu} option is specified then -@samp{32bit} hardware multiply support is assumed. If the MCU name is -not recognised then no hardware multiply support is assumed. -@code{auto} is the default setting. +@option{-mmcu} option. If no @option{-mmcu} option is specified or if +the MCU name is not recognised then no hardware multiply support is +assumed. @code{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 |