diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index aa848bb..4982f7c 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -661,7 +661,8 @@ Objective-C and Objective-C++ Dialects}. @emph{AVR Options} @gccoptlist{-mmcu=@var{mcu} -mabsdata -maccumulate-args @gol -mbranch-cost=@var{cost} @gol --mcall-prologues -mint8 -mn_flash=@var{size} -mno-interrupts @gol +-mcall-prologues -mgas-isr-prologues -mint8 @gol +-mn_flash=@var{size} -mno-interrupts @gol -mrelax -mrmw -mstrict-X -mtiny-stack -mfract-convert-truncate @gol -mshort-calls -nodevicelib @gol -Waddr-space-convert -Wmisspelled-isr} @@ -15977,6 +15978,18 @@ integers. The default branch cost is 0. Functions prologues/epilogues are expanded as calls to appropriate subroutines. Code size is smaller. +@item -mgas-isr-prologues +@opindex mgas-isr-prologues +Interrupt service routines (ISRs) may use the @code{__gcc_isr} pseudo +instruction supported by GNU Binutils, see the +@w{@uref{https://sourceware.org/binutils/docs/as/AVR_002dDependent.html,AVR assembler manual}} +for details. +If this option is on, the feature can still be disabled for individual +ISRs by means of the @ref{AVR Function Attributes,,@code{no_gccisr}} +function attribute. This feature is activated per default +if optimization is on (but not with @option{-Og}, @pxref{Optimize Options}), +and if GNU Binutils support @w{@uref{https://sourceware.org/PR21683,PR21683}}. + @item -mint8 @opindex mint8 Assume @code{int} to be 8-bit integer. This affects the sizes of all types: a |