[LINUX][ZH] Fix CRCDiff tool compilation (#620)

Co-authored-by: Patrick Zacharias <[email protected]>

Author: feliwir

CMakeLists.txt

@@ -42,15 +42,17 @@ include(FetchContent)
 if((WIN32 OR "${CMAKE_SYSTEM}" MATCHES "Windows") AND ${CMAKE_SIZEOF_VOID_P} EQUAL 4)
     include(cmake/miles.cmake)
     include(cmake/bink.cmake)
-    if (IS_VS6_BUILD)
-        include(cmake/stlport.cmake)
-    else()
-        add_library(stlport INTERFACE) # Do not use stlport
-    endif()
     include(cmake/dx8.cmake)
     include(cmake/dbghelp.cmake)
 endif()
 
+# Define a dummy stlport target when not on VC6.
+if (IS_VS6_BUILD)
+    include(cmake/stlport.cmake)
+else()
+    add_library(stlport INTERFACE)
+endif()
+
 include(cmake/config.cmake)
 include(cmake/gamespy.cmake)
 include(cmake/lzhl.cmake)

GeneralsMD/Code/Tools/CRCDiff/CRCDiff.cpp

@@ -24,6 +24,7 @@
 #include <list>
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 
 //=============================================================================
 

GeneralsMD/Code/Tools/CRCDiff/KVPair.cpp

@@ -27,6 +27,7 @@
 #include "KVPair.h"
 #include "debug.h"
 #include <stdio.h>
+#include <string.h>
 
 std::string intToString(int val)
 {