[PATCH 1/3] arch: teach sparse about the '-march' option

[Luc Van Oostenryck <luc.vanoostenryck@gmail.com>]

The option '-march' is not one of the common option but is
architecture specific.

So, teach sparse to delegate the parsing of this option to
the targets.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 options.c | 8 ++++++++
 target.h  | 1 +
 2 files changed, 9 insertions(+)

diff --git a/options.c b/options.c
index 9f05bdf9cf4f..1a3fee3c6751 100644
--- a/options.c
+++ b/options.c
@@ -609,6 +609,13 @@ static char **handle_switch_M(char *arg, char **next)
 	return next;
 }
 
+static int handle_march(const char *opt, const char *arg, const struct flag *flag, int options)
+{
+	if (arch_target->parse_march)
+		arch_target->parse_march(arg);
+	return 1;
+}
+
 static int handle_mcmodel(const char *opt, const char *arg, const struct flag *flag, int options)
 {
 	static const struct val_map cmodels[] = {
@@ -650,6 +657,7 @@ static const struct flag mflags[] = {
 	{ "x32",&arch_m64, NULL, OPT_VAL, ARCH_X32 },
 	{ "size-llp64", &arch_m64, NULL, OPT_VAL, ARCH_LLP64 },
 	{ "size-long", &arch_msize_long },
+	{ "arch=", NULL, handle_march },
 	{ "big-endian", &arch_big_endian, NULL },
 	{ "little-endian", &arch_big_endian, NULL, OPT_INVERSE },
 	{ "cmodel", &arch_cmodel, handle_mcmodel },
diff --git a/target.h b/target.h
index 8f79426c096a..54e97e83b10d 100644
--- a/target.h
+++ b/target.h
@@ -76,6 +76,7 @@ struct target {
 	const struct builtin_fn *builtins;
 
 	void (*init)(const struct target *self);
+	void (*parse_march)(const char *arg);
 	void (*predefine)(const struct target *self);
 	const char *(*asm_constraint)(struct asm_operand *op, int c, const char *str);
 };
-- 
2.27.0