x64: use correct exe name and set +x

.github/workflows/ci.yml

@@ -46,7 +46,7 @@ jobs:
     - name: Bare metal
       run: ./v -freestanding -o bare vlib/os/bare/bare_example_linux.v
     - name: x64 machine code generation
-      run: ./v -x64 examples/x64/hello_world.v
+      run: cd examples/x64 && ./v -x64 hello_world.v && ./hello_world
 
   build-ubuntu-tcc:
     runs-on: ubuntu-18.04

vlib/compiler/gen_x64.v

@@ -1,25 +1,6 @@
 module compiler
 
-import filepath
+//import filepath
 
 //import compiler.x64
 
-pub fn (v mut V) compile_x64() {
-	$if !linux {
-		println('v -x64 can only generate Linux binaries for now')
-		println('You are not on a Linux system, so you will not ' +
-			'be able to run the resulting executable')
-	}	
-	
-	v.files << v.v_files_from_dir(filepath.join(v.pref.vlib_path, 'builtin', 'bare'))
-	v.files << v.dir
-	v.x64.generate_elf_header()
-	for f in v.files {
-		v.parse(f, .decl)
-	}
-	for f in v.files {
-		v.parse(f, .main)
-	}
-	v.x64.generate_elf_footer()
-	
-}	

vlib/compiler/main.v

@@ -347,6 +347,26 @@ pub fn (v mut V) compile() {
 	v.cc()
 }
 
+pub fn (v mut V) compile_x64() {
+	$if !linux {
+		println('v -x64 can only generate Linux binaries for now')
+		println('You are not on a Linux system, so you will not ' +
+			'be able to run the resulting executable')
+	}	
+	
+	v.files << v.v_files_from_dir(filepath.join(v.pref.vlib_path, 'builtin', 'bare'))
+	v.files << v.dir
+	v.x64.generate_elf_header()
+	for f in v.files {
+		v.parse(f, .decl)
+	}
+	for f in v.files {
+		v.parse(f, .main)
+	}
+	v.x64.generate_elf_footer()
+	
+}	
+
 fn (v mut V) generate_init() {
 	$if js { return }
 	if v.pref.build_mode == .build_module {

vlib/compiler/x64/elf.v

@@ -88,7 +88,8 @@ pub fn (g mut Gen) generate_elf_footer() {
 	g.write64_at(file_size, g.file_size_pos) // set file size 64 bit value
 	g.write64_at(file_size, g.file_size_pos+8)
 	// Create the binary
-	f := os.create('out.bin') or { panic(err) }
+	f := os.create(g.out_name) or { panic(err) }
+	C.chmod(g.out_name.str, 0775)
 	f.write_bytes(g.buf.data, g.buf.len)
 	f.close()
 	println('x64 elf binary has been successfully generated')