From 2ac80485c04ea4395d42b7b1d6bbefb8a430fb6d Mon Sep 17 00:00:00 2001
From: Delyan Angelov <delian66@gmail.com>
Date: Tue, 1 Oct 2019 14:35:59 +0300
Subject: [PATCH] C backend: fix a couple of C warnings on Linux

---
 vlib/builtin/array.v   | 2 --
 vlib/builtin/builtin.v | 2 +-
 vlib/builtin/int.v     | 2 +-
 3 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/vlib/builtin/array.v b/vlib/builtin/array.v
index d95af682c8..66ad74c073 100644
--- a/vlib/builtin/array.v
+++ b/vlib/builtin/array.v
@@ -18,8 +18,6 @@ pub:
 
 // Private function, used by V (`nums := []int`)
 fn new_array(mylen, cap, elm_size int) array {
-	a := 3
-	_ = a
 	//println(a)
 	arr := array {
 		len: mylen
diff --git a/vlib/builtin/builtin.v b/vlib/builtin/builtin.v
index f8cdde0def..9ee6548e82 100644
--- a/vlib/builtin/builtin.v
+++ b/vlib/builtin/builtin.v
@@ -38,7 +38,7 @@ pub fn print_backtrace_skipping_top_frames(skipframes int) {
 			if C.backtrace_symbols_fd != 0 {
 				buffer := [100]byteptr
 				nr_ptrs := C.backtrace(*voidptr(buffer), 100)
-				C.backtrace_symbols_fd(&buffer[skipframes], nr_ptrs-skipframes, 1)
+				C.backtrace_symbols_fd(*voidptr(&buffer[skipframes]), nr_ptrs-skipframes, 1)
 				return
 			}else{
 				C.printf('backtrace_symbols_fd is missing, so printing backtraces is not available.\n')
diff --git a/vlib/builtin/int.v b/vlib/builtin/int.v
index 5ec3726539..c8774bc41e 100644
--- a/vlib/builtin/int.v
+++ b/vlib/builtin/int.v
@@ -179,7 +179,7 @@ pub fn (n i64) hex() string {
 		19
 	}
 	hex := malloc(len)
-	count := int(C.sprintf(*char(hex), '0x%llx', n))
+	count := int(C.sprintf(*char(hex), '0x%lx', n))
 	return tos(hex, count)
 }