Do not rebuild win dependencies if they are already built.

marketmaker_build_depends.cmd

@@ -36,24 +36,27 @@ exit
 rem MSBuild /help
 echo.
 echo Decker will automatically download and build all needed *.dll and *.lib for you ;)
-timeout /t 5 /nobreak
 
 mkdir marketmaker_depends
 mkdir x64\Release
 
 rem --- pthreads ---
 :compile_pthreads
+if not exist marketmaker_depends\pthread-win32\bin\x64_MSVC2015.Release\pthread_lib.lib (
 cd marketmaker_depends
 git clone https://github.com/DeckerSU/pthread-win32
 cd pthread-win32
 MSBuild pthread.2015.sln /t:Rebuild /p:Configuration=Release /p:Platform=Win32
 MSBuild pthread.2015.sln /t:Rebuild /p:Configuration=Release /p:Platform=x64
 cd ../..
+)
 copy marketmaker_depends\pthread-win32\bin\x64_MSVC2015.Release\pthread_lib.lib OSlibs\win\x64\pthread_lib.lib 
 
 rem --- nanomsg ---
 :compile_nanomsg
-
+if not exist marketmaker_depends\nanomsg\build_msvc_2015_win64\Release\nanomsg.lib (
+	if not exist marketmaker_depends\nanomsg\build_msvc_2015_win64\Release\nanomsg.exp (
+		if not exist marketmaker_depends\nanomsg\build_msvc_2015_win64\Release\nanomsg.dll (
 			cd marketmaker_depends 
 			git clone https://github.com/nanomsg/nanomsg
 			cd nanomsg
@@ -63,12 +66,18 @@ cd build_msvc_2015_win64
 			cmake -G "Visual Studio 14 2015 Win64" ..
 			cmake --build . --config Release --target nanomsg
 			cd ../../..
+		)
+	)
+)
 copy marketmaker_depends\nanomsg\build_msvc_2015_win64\Release\nanomsg.lib OSlibs\win\x64\release\nanomsg.lib 
 copy marketmaker_depends\nanomsg\build_msvc_2015_win64\Release\nanomsg.exp OSlibs\win\x64\release\nanomsg.exp
 copy marketmaker_depends\nanomsg\build_msvc_2015_win64\Release\nanomsg.dll x64\Release\nanomsg.dll 
 
 rem --- curl ---
 :compile_curl
+if not exist marketmaker_depends\curl\build_msvc_2015_win64\lib\Release\libcurl_imp.lib (
+	if not exist marketmaker_depends\curl\build_msvc_2015_win64\lib\Release\libcurl_imp.exp (
+		if not exist marketmaker_depends\curl\build_msvc_2015_win64\lib\Release\libcurl.dll (
 			cd marketmaker_depends 
 			git clone https://github.com/curl/curl
 			cd curl
@@ -84,6 +93,9 @@ rem cmake --build . --config Release
 			rem cmake --build . --config Release --target libcurl
 
 			cd ../../..
+		)
+	)
+)
 copy marketmaker_depends\curl\build_msvc_2015_win64\lib\Release\libcurl_imp.lib OSlibs\win\x64\release\libcurl.lib
 copy marketmaker_depends\curl\build_msvc_2015_win64\lib\Release\libcurl_imp.exp OSlibs\win\x64\release\libcurl.exp
 copy marketmaker_depends\curl\build_msvc_2015_win64\lib\Release\libcurl.dll x64\Release\libcurl.dll