| Message ID | 20240220154537.3830-2-palmer@rivosinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | doc: RISC-V: Document that -mcpu doesn't override -march or -mtune | expand |
LGTM, and committed :) On Tue, Feb 20, 2024 at 11:46 PM Palmer Dabbelt <palmer@rivosinc.com> wrote: > > This came up recently as Edwin was looking through the test suite. A > few of us were talking about this during the patchwork meeting and were > surprised. Looks like this is the desired behavior, so let's at least > document it. > > gcc/ChangeLog: > > * doc/invoke.texi: Document -mcpu. > > Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> > --- > gcc/doc/invoke.texi | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi > index 6ec56493e59..4a4bba9f1cd 100644 > --- a/gcc/doc/invoke.texi > +++ b/gcc/doc/invoke.texi > @@ -30670,6 +30670,8 @@ Permissible values for this option are: @samp{sifive-e20}, @samp{sifive-e21}, > @samp{sifive-s21}, @samp{sifive-s51}, @samp{sifive-s54}, @samp{sifive-s76}, > @samp{sifive-u54}, @samp{sifive-u74}, and @samp{sifive-x280}. > > +Note that @option{-mcpu} does not override @option{-march} or @option{-mtune}. > + > @opindex mtune > @item -mtune=@var{processor-string} > Optimize the output for the given processor, specified by microarchitecture or > -- > 2.43.0 >
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 6ec56493e59..4a4bba9f1cd 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -30670,6 +30670,8 @@ Permissible values for this option are: @samp{sifive-e20}, @samp{sifive-e21}, @samp{sifive-s21}, @samp{sifive-s51}, @samp{sifive-s54}, @samp{sifive-s76}, @samp{sifive-u54}, @samp{sifive-u74}, and @samp{sifive-x280}. +Note that @option{-mcpu} does not override @option{-march} or @option{-mtune}. + @opindex mtune @item -mtune=@var{processor-string} Optimize the output for the given processor, specified by microarchitecture or
This came up recently as Edwin was looking through the test suite. A few of us were talking about this during the patchwork meeting and were surprised. Looks like this is the desired behavior, so let's at least document it. gcc/ChangeLog: * doc/invoke.texi: Document -mcpu. Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> --- gcc/doc/invoke.texi | 2 ++ 1 file changed, 2 insertions(+)