[PATCH v1 2/6] RISC-V: Match GCC's semantics for multiple -march instances

[Luc Van Oostenryck]

On Fri, Apr 01, 2022 at 10:00:37PM -0700, Palmer Dabbelt wrote:
> GCC's semantics for "-march=X -march=Y" are that Y entirely overrides X,
> but sparse takes the union of these two ISA strings.

OK, but then I prefer to explicitly clear riscv_flags at the start
of the function, like:

diff --git a/target-riscv.c b/target-riscv.c
index 3bba7c15ff1f..ca38d76e6465 100644
--- a/target-riscv.c
+++ b/target-riscv.c
@@ -54,6 +54,9 @@ static void parse_march_riscv(const char *arg)
 	};
 	int i;
 
+	// Each -march=.. options entirely overrides previous ones
+	riscv_flags = 0;
+
 	for (i = 0; i < ARRAY_SIZE(basic_sets); i++) {
 		const char *pat = basic_sets[i].pattern;
 		size_t len = strlen(pat);


-- Luc