diff --git a/compiler/cc.v b/compiler/cc.v
index 53c61e4f8a..25f4e31db8 100644
--- a/compiler/cc.v
+++ b/compiler/cc.v
@@ -10,6 +10,9 @@ import (
 )
 
 fn (v mut V) cc() {
+	// build any thirdparty obj files
+	v.build_thirdparty_obj_files()
+
 	// Just create a c file and exit
 	if v.out_name.ends_with('.c') {
 		os.mv(v.out_name_c, v.out_name)
@@ -33,15 +36,6 @@ fn (v mut V) cc() {
 	v.log('cc() isprod=$v.pref.is_prod outname=$v.out_name')
 	mut a := [v.pref.cflags, '-std=gnu11', '-w'] // arguments for the C compiler
 
-	mut seenflags := map[string]int
-	mut uniqueflags := []string
-	for f in v.table.flags {
-		seenflags[ f ] = seenflags[ f ] + 1
-		if seenflags[ f ] > 1 { continue }
-		uniqueflags << f
-	}
-	flags := uniqueflags.join(' ')
-	// Set out name
 	if v.pref.is_so {
 		a << '-shared -fPIC '// -Wl,-z,defs'
 		v.out_name = v.out_name + '.so'
@@ -92,7 +86,7 @@ fn (v mut V) cc() {
 	// -I flags
 	/*
 mut args := ''
-	for flag in v.table.flags {
+	for flag in v.get_os_cflags() {
 		if !flag.starts_with('-l') {
 			args += flag
 			args += ' '
@@ -133,7 +127,9 @@ mut args := ''
 	if v.os == .mac {
 		a << '-mmacosx-version-min=10.7'
 	}
-	a << flags
+	for flag in v.get_os_cflags() {
+		a << flag.format()
+	}
 	a << libs
 	// macOS code can include objective C  TODO remove once objective C is replaced with C
 	// Without these libs compilation will fail on Linux
@@ -224,9 +220,9 @@ fn (c mut V) cc_windows_cross() {
 	}
 	mut args := '-o $c.out_name -w -L. '
 	// -I flags
-	for flag in c.table.flags {
-		if !flag.starts_with('-l') {
-				args += flag
+	for flag in c.get_os_cflags() {
+		if flag.name != '-l' {
+				args += flag.format()
 				args += ' '
 		}
 	}
@@ -243,9 +239,9 @@ fn (c mut V) cc_windows_cross() {
 	}
 	args += ' $c.out_name_c '
 	// -l flags (libs)
-	for flag in c.table.flags {
-			if flag.starts_with('-l') {
-					args += flag
+	for flag in c.get_os_cflags() {
+			if flag.name == '-l' {
+					args += flag.format()
 					args += ' '
 			}
 	}
@@ -289,6 +285,19 @@ fn (c mut V) cc_windows_cross() {
 	println('Done!')
 }
 
+fn (c V) build_thirdparty_obj_files() {
+	for flag in c.get_os_cflags() {
+		if flag.value.ends_with('.o') {
+			if c.os == .msvc {
+				build_thirdparty_obj_file_with_msvc(flag.value)
+			}
+			else {
+				build_thirdparty_obj_file(flag.value)
+			}
+		}
+	}
+}
+
 fn find_c_compiler() string {
 	args := env_vflags_and_os_args().join(' ')
 	defaultcc := find_c_compiler_default()
@@ -306,10 +315,6 @@ fn find_c_compiler_default() string {
 }
 
 fn find_c_compiler_thirdparty_options() string {
-	$if windows {	return '' }
+	$if windows { return '' }
 	return '-fPIC'
 }
-
-
-
-
diff --git a/compiler/cflags.v b/compiler/cflags.v
new file mode 100644
index 0000000000..fd242ee1f5
--- /dev/null
+++ b/compiler/cflags.v
@@ -0,0 +1,115 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+module main
+
+import os
+
+// C flag
+struct CFlag{
+	os    string // eg. windows | darwin | linux
+	name  string // eg. -I
+	value string // eg. /path/to/incude
+}
+
+// check if cflag is in table
+fn (table &Table) has_cflag(cflag CFlag) bool {
+	for cf in table.cflags {
+		if cf.os == cflag.os && cf.name == cflag.name && cf.value == cflag.value {
+			return true
+		}
+	}
+	return false
+}
+
+// get flags for current os
+fn (v V) get_os_cflags() []CFlag {
+	mut flags := []CFlag
+	for flag in v.table.cflags {
+		if flag.os == ''
+		|| (flag.os == 'linux' && v.os == .linux)
+		|| (flag.os == 'darwin' && v.os == .mac)
+		|| (flag.os == 'windows' && (v.os == .windows || v.os == .msvc)) {
+			flags << flag
+		}
+	}
+	return flags
+}
+
+// format flag
+fn (cf &CFlag) format() string {
+	mut value := cf.value
+	// convert to absolute path
+	if cf.name == '-I' || cf.name == '-L' || value.ends_with('.o') {
+		value = '"'+os.realpath(value)+'"'
+	}
+	return '$cf.name $value'.trim_space()
+}
+
+// parse the flags to []CFlag
+// Note: clean up big time (joe-c)
+fn (table mut Table) parse_cflag(cflag string) {
+	allowed_flags := [
+		'framework',
+		'library',
+		'I', 'l', 'L', 
+	]
+	mut flag := cflag.trim_space()
+	if flag == '' {
+		return
+	}
+	mut fos := ''
+	mut name := ''
+	if flag.starts_with('linux') || flag.starts_with('darwin') || flag.starts_with('windows') {
+		pos := flag.index(' ')
+		fos = flag.left(pos).trim_space()
+		flag = flag.right(pos).trim_space()
+	}
+	for {
+		mut index := -1
+		mut value := ''
+		if flag[0] == `-` {
+			for f in allowed_flags {
+				i := 1+f.len
+				if i < flag.len && f == flag.substr(1,i) {
+					name = flag.left(i).trim_space()
+					flag = flag.right(i).trim_space()
+					break
+				}
+			}
+		}
+		for i in [flag.index(' '), flag.index(',')] {
+			if index == -1 || (i != -1 && i < index) {
+				index = i
+			}
+		} if index != -1 && flag[index] == ` ` && flag[index+1] == `-` {
+			for f in allowed_flags {
+				i := index+f.len
+				if i < flag.len && f == flag.substr(index, i) {
+					index = i
+					break
+				}
+			}
+			value = flag.left(index).trim_space()
+			flag = flag.right(index).trim_space()
+		} else if index != -1 && index < flag.len-2 && flag[index] == `,` {
+			value = flag.left(index).trim_space()
+			flag = flag.right(index+1).trim_space()
+		} else {
+			value = flag.trim_space()
+			index = -1
+		}
+		cf := CFlag{
+			os:    fos,
+			name:  name,
+			value: value
+		}
+		if !table.has_cflag(cf) {
+			table.cflags << cf
+		}
+		if index == -1 {
+			break
+		}
+	}
+}
diff --git a/compiler/cgen.v b/compiler/cgen.v
index 941a885ee2..64bf2ade5e 100644
--- a/compiler/cgen.v
+++ b/compiler/cgen.v
@@ -240,13 +240,13 @@ fn (g mut CGen) add_to_main(s string) {
 }
 
 
-fn build_thirdparty_obj_file(flag string) {
-	obj_path := flag.all_after(' ')
+fn build_thirdparty_obj_file(path string) {
+	obj_path := os.realpath(path)
 	if os.file_exists(obj_path) {
 		return
 	}
 	println('$obj_path not found, building it...')
-	parent := os.dir( obj_path )
+	parent := os.dir(obj_path)
 	files := os.ls(parent)
 	mut cfiles := ''
 	for file in files {
@@ -281,15 +281,15 @@ fn os_name_to_ifdef(name string) string {
 }
 
 fn platform_postfix_to_ifdefguard(name string) string {
-  switch name {
-    case '.v': return '' // no guard needed
-    case '_win.v': return '#ifdef _WIN32'
-    case '_nix.v': return '#ifndef _WIN32'
-    case '_lin.v': return '#ifdef __linux__'
-    case '_mac.v': return '#ifdef __APPLE__'
-  }
-  cerror('bad platform_postfix "$name"')
-  return ''
+	switch name {
+		case '.v': return '' // no guard needed
+		case '_win.v': return '#ifdef _WIN32'
+		case '_nix.v': return '#ifndef _WIN32'
+		case '_lin.v': return '#ifdef __linux__'
+		case '_mac.v': return '#ifdef __APPLE__'
+	}
+	cerror('bad platform_postfix "$name"')
+	return ''
 }
 
 // C struct definitions, ordered
@@ -383,4 +383,3 @@ fn sort_structs(types []Type) []Type {
 	}
 	return types_sorted
 }
-
diff --git a/compiler/comptime.v b/compiler/comptime.v
index a503ff798b..aebeb7103e 100644
--- a/compiler/comptime.v
+++ b/compiler/comptime.v
@@ -141,46 +141,11 @@ fn (p mut Parser) chash() {
 	is_sig := p.is_sig()
 	if hash.starts_with('flag ') {
 		mut flag := hash.right(5)
-		// No the right os? Skip!
-		// mut ok := true
-		if hash.contains('linux') && p.os != .linux {
-			return
-		}
-		else if hash.contains('darwin') && p.os != .mac {
-			return
-		}
-		else if hash.contains('windows') && (p.os != .windows && p.os != .msvc) {
-			return
-		}
-		// Remove "linux" etc from flag
-		if flag.contains('linux') || flag.contains('darwin') || flag.contains('windows') {
-			pos := flag.index(' ')
-			flag = flag.right(pos)
-		}
-		has_vroot := flag.contains('@VROOT')
-		flag = flag.trim_space().replace('@VROOT', p.vroot)
-		if p.table.flags.contains(flag) {
-			return
-		}
-		// expand `@VMOD/pg/pg.o` to absolute path
-		has_vmod := flag.contains('@VMOD')
-		flag = flag.trim_space().replace('@VMOD', ModPath)
-		if p.table.flags.contains(flag) {
-			return
-		}
+		// expand `@VROOT` `@VMOD` to absolute path
+		flag = flag.replace('@VROOT', p.vroot)
+		flag = flag.replace('@VMOD', ModPath)
 		p.log('adding flag "$flag"')
-		// `@VROOT/thirdparty/glad/glad.o`, make sure it exists, otherwise build it
-		if (has_vroot || has_vmod) && flag.contains('.o') {
-			flag = os.realpath( flag )
-			//println( 'absolute filepath to objectfile is now: $flag | os is: $p.os ')
-			if p.os == .msvc {
-				build_thirdparty_obj_file_with_msvc(flag)
-			}
-			else {
-				build_thirdparty_obj_file(flag)
-			}
-		}
-		p.table.flags << flag
+		p.table.parse_cflag(flag)
 		return
 	}
 	if hash.starts_with('include') {
diff --git a/compiler/main.v b/compiler/main.v
index 4252ca45b8..07d0ac6924 100644
--- a/compiler/main.v
+++ b/compiler/main.v
@@ -325,7 +325,9 @@ fn (v mut V) compile() {
   cgen.save()
 	if v.pref.is_verbose {
 		v.log('flags=')
-		println(v.table.flags)
+		for flag in v.get_os_cflags() {
+			println(' * ' + flag.format())
+		}
 	}
 	v.cc()
 }
@@ -437,7 +439,7 @@ fn (v V) run_compiled_executable_and_exit() {
 	if v.pref.is_verbose {
 		println('============ running $v.out_name ============')
 	}	
-	mut cmd := final_target_out_name(v.out_name).replace('.exe','')
+	mut cmd := '"' + final_target_out_name(v.out_name).replace('.exe','') + '"'
 	if os.args.len > 3 {
 		cmd += ' ' + os.args.right(3).join(' ')
 	}
@@ -781,9 +783,7 @@ fn new_v(args[]string) &V {
 	vroot := os.dir(os.executable())
 	//println('VROOT=$vroot')
 	// v.exe's parent directory should contain vlib
-	if os.dir_exists(vroot) && os.dir_exists(vroot + '/vlib/builtin') {
-
-	}  else {
+	if !os.dir_exists(vroot) || !os.dir_exists(vroot + '/vlib/builtin') {
 		println('vlib not found. It should be next to the V executable. ')
 		println('Go to https://vlang.io to install V.')
 		exit(1)
diff --git a/compiler/msvc.v b/compiler/msvc.v
index 028f9b8c9a..7015d2f960 100644
--- a/compiler/msvc.v
+++ b/compiler/msvc.v
@@ -207,11 +207,6 @@ fn find_msvc() ?MsvcResult {
 	}
 }
 
-struct ParsedFlag {
-	f string
-	arg string
-}
-
 pub fn (v mut V) cc_msvc() { 
 	r := find_msvc() or {
 		// TODO: code reuse
@@ -305,99 +300,41 @@ pub fn (v mut V) cc_msvc() {
 	mut lib_paths := []string{}
 	mut other_flags := []string{}
 
-	// Emily:
-	// this is a hack to try and support -l -L and object files
-	// passed on the command line
-	mut seenflags := map[string]int // no need to add the same flags more than once
-	for f in v.table.flags {
-		seenflags[ f ] = seenflags[ f ] + 1
-		if seenflags[ f ] > 1 { continue }
-		// People like to put multiple flags per line (which really complicates things)
-		// ...so we need to handle that
-		mut rest := f
+	for flag in v.get_os_cflags() {
+		mut arg := flag.value
+		//println('fl: $flag.name | flag arg: $arg')
 
-		mut flags := []ParsedFlag{}
-		for {
-			mut base := rest
-
-			fl := if rest.starts_with('-') {
-				base = rest.right(2).trim_space()
-				rest.left(2)
-			} else {
-				''
-			}
-
-			// Which ever one of these is lowest we use
-			// TODO: we really shouldnt support all of these cmon
-			mut lowest := base.index('-')
-			// dont break paths with hyphens
-			if lowest != 0  {
-				lowest = -1
-			}
-			for x in [base.index(' '), base.index(',')] {
-				if (x < lowest && x != -1) || lowest == -1 {
-					lowest = x
-				}
-			}
-			arg := if lowest != -1 {
-				rest = base.right(lowest).trim_space().trim(',')
-				base.left(lowest).trim_space().trim(',')
-			} else {
-				rest = ''
-				base.trim_space()
-			}
-
-			flags << ParsedFlag {
-				fl, arg
-			}
-
-			if rest.len == 0 {
-				break
+		// We need to see if the flag contains -l
+		// -l isnt recognised and these libs will be passed straight to the linker
+		// by the compiler
+		if flag.name == '-l' {
+			if arg.ends_with('.dll') {
+				cerror('MSVC cannot link against a dll (`#flag -l $arg`)')
 			}
+			// MSVC has no method of linking against a .dll
+			// TODO: we should look for .defs aswell
+			lib_lib := arg + '.lib'
+			real_libs << lib_lib
 		}
-
-		for flag in flags {
-			fl := flag.f
-			mut arg := flag.arg
-			if fl == '-I' || fl == '-L' {
-				arg = os.realpath( arg )
-			}
-			//println('fl: $fl | flag arg: $arg')
-
-			// We need to see if the flag contains -l
-			// -l isnt recognised and these libs will be passed straight to the linker
-			// by the compiler
-			if fl == '-l' {
-				if arg.ends_with('.dll') {
-					cerror('MSVC cannot link against a dll (`#flag -l $arg`)')
-				}
-				// MSVC has no method of linking against a .dll
-				// TODO: we should look for .defs aswell
-				lib_lib := arg + '.lib'
-				real_libs << lib_lib
-			}
-			else if fl == '-I' {
-				inc_paths << ' -I "$arg" '
-			}
-			else if fl == '-L' {
-				lpath := f.right(2).trim_space()
-				lib_paths << lpath
-				lib_paths << lpath + os.PathSeparator + 'msvc'
-				// The above allows putting msvc specific .lib files in a subfolder msvc/ ,
-				// where gcc will NOT find them, but cl will do...
-				// NB: gcc is smart enough to not need .lib files at all in most cases, the .dll is enough.
-				// When both a msvc .lib file and .dll file are present in the same folder,
-				// as for example for glfw3, compilation with gcc would fail.
-			}
-			else if arg.ends_with('.o') {
-				// msvc expects .obj not .o
-				other_flags << arg + 'bj'
-			} 
-			else {
-				other_flags << arg
-			}
+		else if flag.name == '-I' {
+			inc_paths << ' ' + flag.format() + ' '
+		}
+		else if flag.name == '-L' {
+			lpath := flag.value
+			lib_paths << '"' + lpath + '"'
+			lib_paths << '"' + lpath + os.PathSeparator + 'msvc' + '"'
+			// The above allows putting msvc specific .lib files in a subfolder msvc/ ,
+			// where gcc will NOT find them, but cl will do...
+			// NB: gcc is smart enough to not need .lib files at all in most cases, the .dll is enough.
+			// When both a msvc .lib file and .dll file are present in the same folder,
+			// as for example for glfw3, compilation with gcc would fail.
+		}
+		else if flag.value.ends_with('.o') {
+			other_flags << flag.format().replace('.o', '.obj')
+		}
+		else {
+			other_flags << arg
 		}
-		
 	}
 
 	// Include the base paths
@@ -463,18 +400,16 @@ pub fn (v mut V) cc_msvc() {
 	os.rm(out_name_obj)
 }
 
-fn build_thirdparty_obj_file_with_msvc(flag string) {
+fn build_thirdparty_obj_file_with_msvc(path string) {
 	msvc := find_msvc() or {
 		println('Could not find visual studio')
 		return
 	}
 
-	mut obj_path := flag.all_after(' ')
+	// msvc expects .obj not .o
+	mut obj_path := '${path}bj'
 
-	if obj_path.ends_with('.o') {
-		// msvc expects .obj not .o
-		obj_path = obj_path + 'bj'
-	}
+	obj_path = os.realpath(obj_path)
 
 	if os.file_exists(obj_path) {
 		println('$obj_path already build.')
@@ -482,14 +417,14 @@ fn build_thirdparty_obj_file_with_msvc(flag string) {
 	} 
 
 	println('$obj_path not found, building it (with msvc)...') 
-	parent := os.dir( obj_path )
+	parent := os.dir(obj_path)
 	files := os.ls(parent)
 
 	mut cfiles := '' 
 	for file in files {
 		if file.ends_with('.c') { 
 			cfiles += '"' + os.realpath( parent + os.PathSeparator + file )  + '" '
-		} 
+		}
 	}
 
 	include_string := '-I "$msvc.ucrt_include_path" -I "$msvc.vs_include_path" -I "$msvc.um_include_path" -I "$msvc.shared_include_path"'
diff --git a/compiler/table.v b/compiler/table.v
index d14e27cff8..75b5832e46 100644
--- a/compiler/table.v
+++ b/compiler/table.v
@@ -17,7 +17,7 @@ mut:
 	modules      []string // List of all modules registered by the application
 	imports      []string // List of all imports
 	file_imports []FileImportTable // List of imports for file
-	flags        []string //  ['-framework Cocoa', '-lglfw3']
+	cflags       []CFlag  // ['-framework Cocoa', '-lglfw3']
 	fn_cnt       int //atomic
 	obfuscate    bool
 }
@@ -78,8 +78,6 @@ mut:
 	scope_level     int
 }
 
-
-
 struct Type {
 mut:
 	mod            string
@@ -106,7 +104,6 @@ struct TypeNode {
 	typ Type
 }
 
-
 // For debugging types
 fn (t Type) str() string {
 	mut s := 'type "$t.name" {'