User libraries are added to PATH for windows system.

Also, if the buffer is not saved then user is notified about that instead of compiling the version on disk.

vim/cf5-compiler.vim

@@ -22,7 +22,7 @@ function! s:CompileMSVC() "{{{2
 	let exename=expand("%:p:r:s,$,.exe,")
 	let srcname=expand("%")
 	" compile it
-	let ccline="cl ".$CXXFLAGS." ".g:cppflags." ".g:wcppflags." ".srcname." /Fe".exename." /link ".$LDFLAGS
+	let ccline="cl ".g:cppflags." ".g:wcppflags." ".srcname." /Fe".exename." /link ".g:ldflags
 	echo ccline
 	let cout = system( ccline )
 	if v:shell_error 
@@ -31,9 +31,10 @@ function! s:CompileMSVC() "{{{2
 	endif
 	echo cout
 	" run it
-	let cmd = exename . " " . g:argv
-	echo cmd
-	let eout = system( cmd )
+	let cmdline="\"set PATH=".g:ldlibpath.$PATH." && ".exename." ".g:argv."\""
+	echo exename." ".g:argv
+	"echo cmdline
+	let eout = system( cmdline )
 	echo eout
 endfunction
 
@@ -72,7 +73,7 @@ function! s:CompileGCC() "{{{2
 	let exename=expand("%:p:r:s,$,.exe,")
 	let srcname=expand("%")
 	" compile it
-	let ccline="g++ ".g:cppflags." ".g:lcppflags." ".srcname." -o".exename
+	let ccline="g++ ".g:cppflags." ".g:lcppflags." ".g:ldflags." ".srcname." -o".exename
 	call s:appendOutput(ccline)
 	let cout = system( ccline )
 	if v:shell_error 
@@ -152,12 +153,17 @@ function! s:initDefaults()
 	let g:cppflags=""
 	let g:wcppflags="/O2 /EHsc /DWIN32"
 	let g:lcppflags="-O2"
+	let g:ldflags=""
 	let g:ldlibpath=""
 endfunction
 "
 "	Load compile instructions and call window or linux compiler. {{{1
 "
 function! CF5Compile()
+	if &modified == 1
+		echo "The buffer is not saved. First save it."
+		return
+	endif
 	"
 	"	First init global variables to let cf5-opt override it.
 	"