[PATCH 4/7] builtin: add support for arch-specific builtins

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

Now that a table is used for the declaration of builtin functions
it's easy to support arch-specific builtins.

The main objective is to not 'pollute' the main table with
arch-specfic entries for uncommon architectures.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 builtin.c | 4 ++++
 target.h  | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/builtin.c b/builtin.c
index bb9ec65b2d20..dcf8200ec002 100644
--- a/builtin.c
+++ b/builtin.c
@@ -391,6 +391,9 @@ static void declare_one_builtin(const struct builtin_fn *entry)
 
 static void declare_builtins(const struct builtin_fn tbl[])
 {
+	if (!tbl)
+		return;
+
 	while (tbl->name)
 		declare_one_builtin(tbl++);
 }
@@ -587,5 +590,6 @@ void init_builtins(int stream)
 {
 
 	declare_builtins(builtins_common);
+	declare_builtins(arch_target->builtins);
 	init_linearized_builtins(stream);
 }
diff --git a/target.h b/target.h
index a89e21b63563..1202c0be1ac9 100644
--- a/target.h
+++ b/target.h
@@ -54,6 +54,8 @@ extern int bits_in_enum;
 extern int enum_alignment;
 
 
+struct builtin_fn;
+
 struct target {
 	enum machine	mach;
 	enum bitness	bitness;
@@ -71,6 +73,8 @@ struct target {
 	const struct target *target_32bit;
 	const struct target *target_64bit;
 
+	const struct builtin_fn *builtins;
+
 	void (*init)(const struct target *self);
 	void (*predefine)(const struct target *self);
 };
-- 
2.27.0