update essence platform

core/runtime/procs_essence.odin

@@ -0,0 +1,18 @@
+package runtime
+
+import "core:sys/es"
+
+@(link_name="memset")
+memset :: proc "c" (ptr: rawptr, val: i32, len: int) -> rawptr {
+	return es.CRTmemset(ptr, val, len);
+}
+
+@(link_name="memmove")
+memmove :: proc "c" (dst, src: rawptr, len: int) -> rawptr {
+	return es.CRTmemmove(dst, src, len);
+}
+
+@(link_name="memcpy")
+memcpy :: proc "c" (dst, src: rawptr, len: int) -> rawptr {
+	return es.CRTmemcpy(dst, src, len);
+}

examples/demo/demo.odin

@@ -712,8 +712,8 @@ union_type :: proc() {
 using_statement :: proc() {
 	fmt.println("\n# using statement");
 	// using can used to bring entities declared in a scope/namespace
-	// into the current scope. This can be applied to import declarations,
+	// into the current scope. This can be applied to import names, struct 
-	// import names, struct fields, procedure fields, and struct values.
+	// fields, procedure fields, and struct values.
 
 	Vector3 :: struct{x, y, z: f32};
 	{

src/main.cpp

@@ -1917,7 +1917,7 @@ int main(int arg_count, char const **arg_ptr) {
 
 		if (build_context.cross_compiling && selected_target_metrics->metrics == &target_essence_amd64) {
 	#ifdef GB_SYSTEM_UNIX
-			system_exec_command_line_app("linker", "x86_64-essence-gcc \"%.*s.o\" -o \"%.*s\" %.*s %.*s",
+			system_exec_command_line_app("linker", "x86_64-essence-gcc \"%.*s.o\" -o \"%.*s\" %.*s %.*s", // -ffreestanding -nostdlib
 					LIT(output_base), LIT(output_base), LIT(build_context.link_flags), LIT(build_context.extra_linker_flags));
 	#else
 			gb_printf_err("Linking for cross compilation for this platform is not yet supported (%.*s %.*s)\n",