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 <[email protected]>
---
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
