Use variable path for OpenSSL directory

Use an environment variable $(OpenSSLDir) to configure where VS should
find OpenSSL headers and libraries. Before running a build a user will
need to set the variable:

    SET OpenSSLDir=C:\OpenSSL-Win32

Change-Id: Ic0fccdfbce956161dddca7eb12bdec8ef9d3f29b
Signed-off-by: Thanh Ha <thanh.ha@eclipse.org>

Windows Build/paho-mqtt3as/paho-mqtt3as.vcxproj

@@ -53,13 +53,13 @@
       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>WIN32_LEAN_AND_MEAN;OPENSSL;WIN32;_DEBUG;_WINDOWS;_USRDLL;PAHOMQTT3AS_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <DisableSpecificWarnings>4996</DisableSpecificWarnings>
-      <AdditionalIncludeDirectories>C:\work\openssl\windows_ia32\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(OpenSSLDir)\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <AdditionalDependencies>ws2_32.lib;libeay32.lib;ssleay32.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <AdditionalLibraryDirectories>C:\work\openssl\windows_ia32;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>$(OpenSSLDir)\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -71,7 +71,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32_LEAN_AND_MEAN;OPENSSL;WIN32;NDEBUG;_WINDOWS;_USRDLL;PAHOMQTT3AS_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <DisableSpecificWarnings>4996</DisableSpecificWarnings>
-      <AdditionalIncludeDirectories>C:\work\openssl\windows_x64\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(OpenSSLDir)\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -79,7 +79,7 @@
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <AdditionalDependencies>ws2_32.lib;libeay32.lib;ssleay32.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <AdditionalLibraryDirectories>C:\work\openssl\windows_ia32;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>$(OpenSSLDir)\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
@@ -131,4 +131,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>

Windows Build/paho-mqtt3cs/paho-mqtt3cs.vcxproj

@@ -53,13 +53,13 @@
       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>WIN32_LEAN_AND_MEAN;OPENSSL;WIN32;_DEBUG;_WINDOWS;_USRDLL;PAHOMQTT3AS_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <DisableSpecificWarnings>4996</DisableSpecificWarnings>
-      <AdditionalIncludeDirectories>C:\work\openssl\windows_ia32\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(OpenSSLDir)\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <AdditionalDependencies>ws2_32.lib;libeay32.lib;ssleay32.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <AdditionalLibraryDirectories>C:\work\openssl\windows_ia32;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>$(OpenSSLDir)\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -71,7 +71,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32_LEAN_AND_MEAN;OPENSSL;WIN32;NDEBUG;_WINDOWS;_USRDLL;PAHOMQTT3AS_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <DisableSpecificWarnings>4996</DisableSpecificWarnings>
-      <AdditionalIncludeDirectories>C:\work\openssl\windows_x64\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(OpenSSLDir)\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -79,7 +79,7 @@
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <AdditionalDependencies>ws2_32.lib;libeay32.lib;ssleay32.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <AdditionalLibraryDirectories>C:\work\openssl\windows_ia32;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>$(OpenSSLDir)\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
@@ -131,4 +131,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>