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Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 162dc9e..b5d8ba9 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -1320,19 +1320,6 @@ The ordering of the component words of floating point values stored in memory is controlled by @code{FLOAT_WORDS_BIG_ENDIAN} for the target machine and @code{HOST_FLOAT_WORDS_BIG_ENDIAN} for the host. -@findex DEFAULT_VTABLE_THUNKS -@item DEFAULT_VTABLE_THUNKS -GCC supports two ways of implementing C++ vtables: traditional or with -so-called ``thunks''. The flag @option{-fvtable-thunk} chooses between them. -Define this macro to be a C expression for the default value of that flag. -If @code{DEFAULT_VTABLE_THUNKS} is 0, GCC uses the traditional -implementation by default. The ``thunk'' implementation is more efficient -(especially if you have provided an implementation of -@code{ASM_OUTPUT_MI_THUNK}, see @ref{Function Entry}), but is not binary -compatible with code compiled using the traditional implementation. -If you are writing a new port, define @code{DEFAULT_VTABLE_THUNKS} to 1. - -If you do not define this macro, the default for @option{-fvtable-thunk} is 0. @end table @node Type Layout |