diff --git a/vlib/freetype/freetype.v b/vlib/freetype/freetype.v
index 8620709f60..11d137d52b 100644
--- a/vlib/freetype/freetype.v
+++ b/vlib/freetype/freetype.v
@@ -63,7 +63,9 @@ struct Character {
 }
 
 [typedef]
-struct C.FT_Library {}
+struct C.FT_Library {
+	_z int
+}
 
 pub struct FreeType {
 	shader    gl.Shader
@@ -77,7 +79,7 @@ pub struct FreeType {
 	line_vbo  u32
 	vbo       u32
 	chars     []Character
-	face      &C.FT_FaceRec
+	face      C.FT_Face
 	scale     int // retina = 2 , normal = 1
 mut:
 	utf_runes []string
@@ -116,16 +118,15 @@ struct C.Glyph {
 }
 
 [typedef]
-struct C.FT_FaceRec {
+struct C.FT_Face {
 	glyph &C.Glyph
 	family_name charptr
 	style_name charptr
 }
-///type FT_Face &C.FT_FaceRec
 
 fn C.FT_Load_Char(voidptr, i64, int) int
 
-fn ft_load_char(face &C.FT_FaceRec, code i64) Character {
+fn ft_load_char(face C.FT_Face, code i64) Character {
 	//println('\nftload_char( code=$code)')
 	//C.printf('face=%p\n', face)
 	//C.printf('cobj=%p\n', _face.cobj)
@@ -140,10 +141,10 @@ fn ft_load_char(face &C.FT_FaceRec, code i64) Character {
 	mut texture := 0
 	C.glGenTextures(1, &texture)
 	C.glBindTexture(C.GL_TEXTURE_2D, texture)
-	fgwidth := (*face).glyph.bitmap.width
-	fgrows  := (*face).glyph.bitmap.rows
+	fgwidth := face.glyph.bitmap.width
+	fgrows  := face.glyph.bitmap.rows
 	C.glTexImage2D(C.GL_TEXTURE_2D, 0, C.GL_RED, fgwidth,  fgrows,
-		0, C.GL_RED, C.GL_UNSIGNED_BYTE, (*face).glyph.bitmap.buffer)
+		0, C.GL_RED, C.GL_UNSIGNED_BYTE, face.glyph.bitmap.buffer)
 	// Set texture options
 	C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_WRAP_S, C.GL_CLAMP_TO_EDGE)
 	C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_WRAP_T, C.GL_CLAMP_TO_EDGE)
@@ -157,11 +158,11 @@ fn ft_load_char(face &C.FT_FaceRec, code i64) Character {
 
 		// Note: advance is number of 1/64 pixels
 		// Bitshift by 6 to get value in pixels (2^6 = 64 (divide amount of 1/64th pixels by 64 to get amount of pixels))
-		horizontal_bearing_px:  gg.vec2((*face).glyph.metrics.horiBearingX >> 6, (*face).glyph.metrics.horiBearingY >> 6)
-		vertical_bearing_px:    gg.vec2((*face).glyph.metrics.vertBearingX >> 6, (*face).glyph.metrics.vertBearingY >> 6) // not used for now
+		horizontal_bearing_px:  gg.vec2(face.glyph.metrics.horiBearingX >> 6, face.glyph.metrics.horiBearingY >> 6)
+		vertical_bearing_px:    gg.vec2(face.glyph.metrics.vertBearingX >> 6, face.glyph.metrics.vertBearingY >> 6) // not used for now
 
-		horizontal_advance_px:  (*face).glyph.metrics.horiAdvance >> 6
-		vertical_advance_px:    (*face).glyph.metrics.vertAdvance >> 6
+		horizontal_advance_px:  face.glyph.metrics.horiAdvance >> 6
+		vertical_advance_px:    face.glyph.metrics.vertAdvance >> 6
 	}
 }
 
@@ -192,7 +193,7 @@ pub fn new_context(cfg gg.Cfg) &FreeType {
 	projection := glm.ortho(0, width, 0, height)// 0 at BOT
 	shader.set_mat4('projection', projection)
 	// FREETYPE
-	ft := C.FT_Library{}
+	ft := C.FT_Library{0}
 	// All functions return a value different than 0 whenever
 	// an error occurred
 	mut ret := C.FT_Init_FreeType(&ft)
@@ -214,7 +215,7 @@ pub fn new_context(cfg gg.Cfg) &FreeType {
 		return 0
 	}
 	println('Trying to load font from $font_path')
-	face := &C.FT_FaceRec{}
+	face := C.FT_Face{}
 	ret = int(C.FT_New_Face(ft, font_path.str, 0, &face))
 	if ret != 0	{
 		println('freetype: failed to load the font (error=$ret)')
diff --git a/vlib/gl/gl.v b/vlib/gl/gl.v
index 9906cd4578..0dd3267e19 100644
--- a/vlib/gl/gl.v
+++ b/vlib/gl/gl.v
@@ -11,8 +11,6 @@ module gl
 // joe-c: fix & remove
 pub enum TmpGlImportHack{ non_empty }
 
-fn C.gladLoadGL() int
-
 fn C.glDisable()
 fn C.glEnable()
 fn C.glScissor()
@@ -46,6 +44,7 @@ fn C.glClear()
 fn C.glCreateShader() int
 fn C.glClearColor()
 fn C.glViewport()
+fn C.gladLoadGL()
 fn C.glTexImage2D()
 fn C.glPixelStorei()
 fn C.glBlendFunc()
@@ -53,9 +52,10 @@ fn C.glPolygonMode()
 fn C.glDeleteBuffers()
 
 
+
 pub fn init_glad() {
 	ok := C.gladLoadGL()
-	if ok == 0 {
+	if isnil(ok) {
 		println('Failed to initialize glad OpenGL context')
 		exit(1)
 	}
diff --git a/vlib/glfw/glfw.v b/vlib/glfw/glfw.v
index a90077f53e..a4165a15f0 100644
--- a/vlib/glfw/glfw.v
+++ b/vlib/glfw/glfw.v
@@ -77,7 +77,7 @@ fn C.glfwSwapInterval()
 fn C.glfwMakeContextCurrent()
 fn C.glfwSetWindowTitle()
 fn C.glfwTerminate()
-fn C.glfwCreateWindow(w int, h int, title charptr, m voidptr, sh voidptr) voidptr
+fn C.glfwCreateWindow()
 fn C.glfwWindowHint()
 fn C.glfwDestroyWindow()
 fn C.glfwInit()
diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index 0ca257b7b1..f4de5c57d1 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -124,13 +124,8 @@ pub fn cgen(files []ast.File, table &table.Table, pref &pref.Preferences) string
 	}
 	//
 	g.finish()
-	return g.hashes() +
-		'\n// V includes:\n' + g.includes.str() +
-		'\n// V typedefs:\n' + g.typedefs.str() + g.typedefs2.str() +
-		'\n// V definitions:\n' + g.definitions.str() +
-		'\n// V gowrappers:\n' + g.gowrappers.str() +
-		'\n// V stringliterals:\n' + g.stringliterals.str() +
-		'\n// V out\n' + g.out.str()
+	return g.hashes() + g.includes.str() + g.typedefs.str() + g.typedefs2.str() + g.definitions.str() +
+		g.gowrappers.str() + g.stringliterals.str() + g.out.str()
 }
 
 pub fn (g Gen) hashes() string {
@@ -483,10 +478,7 @@ fn (g mut Gen) stmt(node ast.Stmt) {
 		ast.HashStmt {
 			// #include etc
 			typ := it.val.all_before(' ')
-			if typ == 'include' {
-				g.includes.writeln('#$it.val')
-			}
-			if typ == 'define' {
+			if typ in ['include', 'define'] {
 				g.definitions.writeln('#$it.val')
 			}
 		}