1

vlib/compiler/main.v

@@ -957,9 +957,9 @@ pub fn new_v(args[]string) &V {
 		out_name_c = out_name.all_after(os.path_separator) + '_shared_lib.c'
 	}
 	$if !linux {
-	if pref.is_bare {
-		verror('-bare only works on Linux for now')
-	}	
+		if pref.is_bare && !out_name.ends_with('.c') {
+			verror('-bare only works on Linux for now')
+		}	
 	}
 	return &V{
 		os: _os

vlib/os/bare/bare.S

@@ -0,0 +1,28 @@
+.intel_syntax noprefix
+.text
+    .globl _start, syscall5
+
+    _start:
+        xor rbp,rbp
+        pop rdi
+        mov rsi,rsp
+        and rsp,-16
+        call main
+
+        mov rdi,rax /* syscall param 1 = rax (ret value of main) */
+        mov rax,60 /* SYS_exit */
+        syscall
+
+        ret /* should never be reached, but if the OS somehow fails
+               to kill us, it will cause a segmentation fault */
+
+    syscall5:
+        mov rax,rdi
+        mov rdi,rsi
+        mov rsi,rdx
+        mov rdx,rcx
+        mov r10,r8
+        mov r8,r9
+        syscall
+        ret
+

vlib/os/bare/bare.v

@@ -0,0 +1,16 @@
+fn syscall5(number, arg1, arg2, arg3, arg4, arg5 voidptr) voidptr
+
+fn write(fd int, data voidptr, nbytes u64) int {
+	return 	 syscall5(
+          1, // SYS_write
+           fd,
+            data,
+            nbytes,
+            0, // ignored
+            0  // ignored
+        )
+}
+
+fn main() {
+C.write(1, "hallo\n", 6)
+}