diff --git a/compiler/cc.v b/compiler/cc.v
index e02f162f55..ba07751e01 100644
--- a/compiler/cc.v
+++ b/compiler/cc.v
@@ -147,15 +147,10 @@ fn (v mut V) cc() {
 	cflags := v.get_os_cflags()
 
 	// add .o files
-	for flag in cflags {
-		if !flag.value.ends_with('.o') { continue }
-		a << flag.format()
-	}
+	a << cflags.c_options_only_object_files()
+	
 	// add all flags (-I -l -L etc) not .o files
-	for flag in cflags {
-		if flag.value.ends_with('.o') { continue }
-		a << flag.format()
-	}
+	a << cflags.c_options_without_object_files()
 	
 	a << libs
 	// Without these libs compilation will fail on Linux
@@ -274,12 +269,7 @@ fn (c mut V) cc_windows_cross() {
 	mut args := '-o $c.out_name -w -L. '
 	cflags := c.get_os_cflags()
 	// -I flags
-	for flag in cflags {
-		if flag.name != '-l' {
-				args += flag.format()
-				args += ' '
-		}
-	}
+	args += cflags.c_options_before_target()
 	mut libs := ''
 	if c.pref.build_mode == .default_mode {
 		libs = '"$ModPath/vlib/builtin.o"'
@@ -292,13 +282,7 @@ fn (c mut V) cc_windows_cross() {
 		}
 	}
 	args += ' $c.out_name_c '
-	// -l flags (libs)
-	for flag in cflags {
-		if flag.name == '-l' {
-				args += flag.format()
-				args += ' '
-		}
-	}
+	args += cflags.c_options_after_target()
 	println('Cross compiling for Windows...')
 	winroot := '$ModPath/winroot'
 	if !os.dir_exists(winroot) {
@@ -339,14 +323,15 @@ fn (c mut V) cc_windows_cross() {
 	println('Done!')
 }
 
-fn (c V) build_thirdparty_obj_files() {
+fn (c &V) build_thirdparty_obj_files() {
 	for flag in c.get_os_cflags() {
-		if flag.value.ends_with('.o') {
+		if flag.value.ends_with('.o') {			
+			rest_of_module_flags := c.get_rest_of_module_cflags( flag )
 			if c.os == .msvc {
-				build_thirdparty_obj_file_with_msvc(flag.value)
+				build_thirdparty_obj_file_with_msvc(flag.value, rest_of_module_flags)
 			}
 			else {
-				build_thirdparty_obj_file(flag.value)
+				build_thirdparty_obj_file(flag.value, rest_of_module_flags)
 			}
 		}
 	}
diff --git a/compiler/cflags.v b/compiler/cflags.v
index 2edb6a2ee9..ec7e1e5a65 100644
--- a/compiler/cflags.v
+++ b/compiler/cflags.v
@@ -8,13 +8,18 @@ import os
 
 // parsed cflag
 struct CFlag{
+	mod   string // the module in which the flag was given
 	os    string // eg. windows | darwin | linux
 	name  string // eg. -I
 	value string // eg. /path/to/include
 }
 
+fn (c &CFlag) str() string {
+	return 'CFlag{ name: "$c.name" value: "$c.value" mod: "$c.mod" os: "$c.os" }'
+}
+
 // get flags for current os
-fn (v V) get_os_cflags() []CFlag {
+fn (v &V) get_os_cflags() []CFlag {
 	mut flags := []CFlag
 	for flag in v.table.cflags {
 		if flag.os == ''
@@ -27,6 +32,18 @@ fn (v V) get_os_cflags() []CFlag {
 	return flags
 }
 
+fn (v &V) get_rest_of_module_cflags(c &CFlag) []CFlag {
+	mut flags := []CFlag
+	cflags := v.get_os_cflags()
+	for flag in cflags {
+		if c.mod == flag.mod {
+			if c.name == flag.name && c.value == flag.value && c.os == flag.os { continue }
+			flags << flag
+		}
+	}
+	return flags
+}
+
 // format flag
 fn (cf &CFlag) format() string {
 	mut value := cf.value
@@ -52,7 +69,7 @@ fn (table &Table) has_cflag(cflag CFlag) bool {
 
 // parse the flags to (table.cflags) []CFlag
 // Note: clean up big time (joe-c)
-fn (table mut Table) parse_cflag(cflag string) {
+fn (table mut Table) parse_cflag(cflag string, mod string) {
 	allowed_flags := [
 		'framework',
 		'library',
@@ -107,6 +124,7 @@ fn (table mut Table) parse_cflag(cflag string) {
 			index = -1
 		}
 		cf := CFlag{
+			mod:   mod,
 			os:    fos,
 			name:  name,
 			value: value
@@ -119,3 +137,53 @@ fn (table mut Table) parse_cflag(cflag string) {
 		}
 	}
 }
+
+//TODO: implement msvc specific c_options_before_target and c_options_after_target ...
+fn (cflags []CFlag) c_options_before_target() string {	
+	$if msvc {
+		return ''
+	}
+	// -I flags, optimization flags and so on
+	mut args:=[]string
+	for flag in cflags {
+		if flag.name != '-l' {
+			args << flag.format()
+		}
+	}
+	return args.join(' ')
+}
+
+fn (cflags []CFlag) c_options_after_target() string {
+	$if msvc {
+		return ''
+	}
+	// -l flags (libs)
+	mut args:=[]string
+	for flag in cflags {
+		if flag.name == '-l' {
+			args << flag.format()
+		}
+	}
+	return args.join(' ')
+}
+
+fn (cflags []CFlag) c_options_without_object_files() string {
+	mut args:=[]string
+	for flag in cflags {
+		if flag.value.ends_with('.o') || flag.value.ends_with('.obj') {
+			continue
+		}
+		args << flag.format()
+	}
+	return args.join(' ')
+}
+
+fn (cflags []CFlag) c_options_only_object_files() string {
+	mut args:=[]string
+	for flag in cflags {
+		if flag.value.ends_with('.o') || flag.value.ends_with('.obj') { 
+			args << flag.format()
+		}
+	}
+	return args.join(' ')
+}
diff --git a/compiler/cgen.v b/compiler/cgen.v
index bcb746901c..dbaf707588 100644
--- a/compiler/cgen.v
+++ b/compiler/cgen.v
@@ -239,7 +239,7 @@ fn (g mut CGen) add_to_main(s string) {
 }
 
 
-fn build_thirdparty_obj_file(path string) {
+fn build_thirdparty_obj_file(path string, moduleflags []CFlag) {
 	obj_path := os.realpath(path)
 	if os.file_exists(obj_path) {
 		return
@@ -255,7 +255,9 @@ fn build_thirdparty_obj_file(path string) {
 	}
 	cc := find_c_compiler()
 	cc_thirdparty_options := find_c_compiler_thirdparty_options()
-	cmd := '$cc $cc_thirdparty_options -c -o "$obj_path" $cfiles'
+	btarget := moduleflags.c_options_before_target()
+	atarget := moduleflags.c_options_after_target()
+	cmd := '$cc $cc_thirdparty_options $btarget -c -o "$obj_path" $cfiles $atarget '
 	res := os.exec(cmd) or {
 		println('failed thirdparty object build cmd: $cmd')
 		cerror(err)
diff --git a/compiler/comptime.v b/compiler/comptime.v
index 96c4cb73fc..2fc8f55a2b 100644
--- a/compiler/comptime.v
+++ b/compiler/comptime.v
@@ -151,7 +151,7 @@ fn (p mut Parser) chash() {
 		flag = flag.replace('@VROOT', p.vroot)
 		flag = flag.replace('@VMOD', ModPath)
 		p.log('adding flag "$flag"')
-		p.table.parse_cflag(flag)
+		p.table.parse_cflag(flag, p.mod)
 		return
 	}
 	if hash.starts_with('include') {
diff --git a/compiler/msvc.v b/compiler/msvc.v
index b61e071637..bea072fdb6 100644
--- a/compiler/msvc.v
+++ b/compiler/msvc.v
@@ -295,13 +295,131 @@ pub fn (v mut V) cc_msvc() {
 		'odbccp32.lib'
 	]
 
-	mut inc_paths := []string{}
-	mut lib_paths := []string{}
-	mut other_flags := []string{}
+	sflags := v.get_os_cflags().msvc_string_flags()
+	real_libs   << sflags.real_libs
+	inc_paths   := sflags.inc_paths
+	lib_paths   := sflags.lib_paths
+	other_flags := sflags.other_flags
 
-	for flag in v.get_os_cflags() {
-		//println('fl: $flag.name | flag arg: $flag.value')
+	// Include the base paths
+	a << '-I "$r.ucrt_include_path"'
+	a << '-I "$r.vs_include_path"'
+	a << '-I "$r.um_include_path"'
+	a << '-I "$r.shared_include_path"'
 
+	a << inc_paths
+
+	a << other_flags
+
+	// Libs are passed to cl.exe which passes them to the linker
+	a << real_libs.join(' ')
+
+	a << '/link'
+	a << '/NOLOGO'
+	a << '/OUT:"$v.out_name"'
+	a << '/LIBPATH:"$r.ucrt_lib_path"'
+	a << '/LIBPATH:"$r.um_lib_path"'
+	a << '/LIBPATH:"$r.vs_lib_path"'
+	a << '/INCREMENTAL:NO' // Disable incremental linking
+
+	if !v.pref.is_prod {
+		a << '/DEBUG:FULL'
+	} else {
+		a << '/DEBUG:NONE'
+	}
+
+	a << lib_paths
+	
+	args := a.join(' ')
+
+	cmd := '""$r.full_cl_exe_path" $args"' 
+	// It is hard to see it at first, but the quotes above ARE balanced :-| ... 
+	// Also the double quotes at the start ARE needed.
+	if v.pref.show_c_cmd || v.pref.is_verbose {
+		println('\n========== cl cmd line:')
+		println(cmd)
+		println('==========\n')
+	}
+
+	// println('$cmd')
+
+	res := os.exec(cmd) or {
+		println(err)
+		cerror('msvc error')
+		return
+	}
+	if res.exit_code != 0 {
+		cerror(res.output)
+	}
+	// println(res)
+	// println('C OUTPUT:')
+
+	if !v.pref.is_debug && v.out_name_c != 'v.c' && v.out_name_c != 'v_macos.c' {
+		os.rm(v.out_name_c)
+	}
+
+	// Always remove the object file - it is completely unnecessary
+	os.rm(out_name_obj)
+}
+fn build_thirdparty_obj_file_with_msvc(path string, moduleflags []CFlag) {
+	msvc := find_msvc() or {
+		println('Could not find visual studio')
+		return
+	}
+
+	// msvc expects .obj not .o
+	mut obj_path := '${path}bj'
+
+	obj_path = os.realpath(obj_path)
+
+	if os.file_exists(obj_path) {
+		println('$obj_path already build.')
+		return 
+	} 
+
+	println('$obj_path not found, building it (with msvc)...') 
+	parent := os.dir(obj_path)
+	files := os.ls(parent)
+
+	mut cfiles := '' 
+	for file in files {
+		if file.ends_with('.c') { 
+			cfiles += '"' + os.realpath( parent + os.PathSeparator + file )  + '" '
+		}
+	}
+
+	include_string := '-I "$msvc.ucrt_include_path" -I "$msvc.vs_include_path" -I "$msvc.um_include_path" -I "$msvc.shared_include_path"'
+
+	//println('cfiles: $cfiles')
+
+	btarget := moduleflags.c_options_before_target()
+	atarget := moduleflags.c_options_after_target()
+	cmd := '""$msvc.full_cl_exe_path" /volatile:ms /Z7 $include_string /c $btarget $cfiles $atarget /Fo"$obj_path""'
+	//NB: the quotes above ARE balanced.
+	println('thirdparty cmd line: $cmd')
+	res := os.exec(cmd) or {
+		cerror(err)
+		return
+	}
+	println(res.output)
+}
+
+
+struct MsvcStringFlags {
+mut:
+	real_libs []string
+	inc_paths []string
+	lib_paths []string
+	other_flags []string
+}
+
+fn (cflags []CFlag) msvc_string_flags() MsvcStringFlags {
+	mut real_libs := []string
+	mut inc_paths := []string
+	mut lib_paths := []string
+	mut other_flags := []string	
+	for flag in cflags {
+		//println('fl: $flag.name | flag arg: $flag.value')		
 		// 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
@@ -335,107 +453,10 @@ pub fn (v mut V) cc_msvc() {
 		}
 	}
 
-	// Include the base paths
-	a << '-I "$r.ucrt_include_path"'
-	a << '-I "$r.vs_include_path"'
-	a << '-I "$r.um_include_path"'
-	a << '-I "$r.shared_include_path"'
-
-	a << inc_paths
-
-	a << other_flags
-
-	// Libs are passed to cl.exe which passes them to the linker
-	a << real_libs.join(' ')
-
-	a << '/link'
-	a << '/NOLOGO'
-	a << '/OUT:"$v.out_name"'
-	a << '/LIBPATH:"$r.ucrt_lib_path"'
-	a << '/LIBPATH:"$r.um_lib_path"'
-	a << '/LIBPATH:"$r.vs_lib_path"'
-	a << '/INCREMENTAL:NO' // Disable incremental linking
-
+	mut lpaths := []string
 	for l in lib_paths {
-		a << '/LIBPATH:"' + os.realpath(l) + '"'
+		lpaths << '/LIBPATH:"' + os.realpath(l) + '"'
 	}
 
-	if !v.pref.is_prod {
-		a << '/DEBUG:FULL'
-	} else {
-		a << '/DEBUG:NONE'
-	}
-
-	args := a.join(' ')
-
-	cmd := '""$r.full_cl_exe_path" $args"' 
-	// It is hard to see it at first, but the quotes above ARE balanced :-| ... 
-	// Also the double quotes at the start ARE needed.
-	if v.pref.show_c_cmd || v.pref.is_verbose {
-		println('\n========== cl cmd line:')
-		println(cmd)
-		println('==========\n')
-	}
-
-	// println('$cmd')
-
-	res := os.exec(cmd) or {
-		println(err)
-		cerror('msvc error')
-		return
-	}
-	if res.exit_code != 0 {
-		cerror(res.output)
-	}
-	// println(res)
-	// println('C OUTPUT:')
-
-	if !v.pref.is_debug && v.out_name_c != 'v.c' && v.out_name_c != 'v_macos.c' {
-		os.rm(v.out_name_c)
-	}
-
-	// Always remove the object file - it is completely unnecessary
-	os.rm(out_name_obj)
+	return MsvcStringFlags{ real_libs, inc_paths, lpaths, other_flags }
 }
-
-fn build_thirdparty_obj_file_with_msvc(path string) {
-	msvc := find_msvc() or {
-		println('Could not find visual studio')
-		return
-	}
-
-	// msvc expects .obj not .o
-	mut obj_path := '${path}bj'
-
-	obj_path = os.realpath(obj_path)
-
-	if os.file_exists(obj_path) {
-		println('$obj_path already build.')
-		return 
-	} 
-
-	println('$obj_path not found, building it (with msvc)...') 
-	parent := os.dir(obj_path)
-	files := os.ls(parent)
-
-	mut cfiles := '' 
-	for file in files {
-		if file.ends_with('.c') { 
-			cfiles += '"' + os.realpath( parent + os.PathSeparator + file )  + '" '
-		}
-	}
-
-	include_string := '-I "$msvc.ucrt_include_path" -I "$msvc.vs_include_path" -I "$msvc.um_include_path" -I "$msvc.shared_include_path"'
-
-	//println('cfiles: $cfiles')
-
-	cmd := '""$msvc.full_cl_exe_path" /volatile:ms /Z7 $include_string /c $cfiles /Fo"$obj_path""'
-	//NB: the quotes above ARE balanced.
-	println('thirdparty cmd line: $cmd')
-	res := os.exec(cmd) or {
-		cerror(err)
-		return
-	}
-	println(res.output)
-}
-