[vcpkg]Port toolchains (#7687)

* checkpoint commit

* Only set VCPKG_ENV_OVERRIDES_FILE if it exists

* First pass at working port-toolchain

* Update VERSION.txt

* Return rvalue

* Fix compilation error

* Some fixes are requested by @ubsan

* Fix another compilation error

2 files changed, 10 insertions, 4 deletions

diff --git a/toolsrc/include/vcpkg/base/util.h b/toolsrc/include/vcpkg/base/util.h
index 40022a012..3d32e3aa8 100644
--- a/toolsrc/include/vcpkg/base/util.h
+++ b/toolsrc/include/vcpkg/base/util.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <algorithm>
+#include <functional>
 #include <map>
 #include <mutex>
 #include <type_traits>
@@ -121,21 +122,23 @@ namespace vcpkg::Util
         }
     }
 
-    template<class Range>
-    void sort(Range& cont)
+    template<class Range, class Comp = std::less<typename Range::value_type>>
+    void sort(Range& cont, Comp comp = Comp())
     {
         using std::begin;
         using std::end;
-        std::sort(begin(cont), end(cont));
+        std::sort(begin(cont), end(cont), comp);
     }
 
     template<class Range>
-    void sort_unique_erase(Range& cont)
+    Range&& sort_unique_erase(Range&& cont)
     {
         using std::begin;
         using std::end;
         std::sort(begin(cont), end(cont));
         cont.erase(std::unique(begin(cont), end(cont)), end(cont));
+
+        return std::forward<Range>(cont);
     }
 
     template<class Range1, class Range2>
diff --git a/toolsrc/include/vcpkg/build.h b/toolsrc/include/vcpkg/build.h
index cd1821b32..4f6397662 100644
--- a/toolsrc/include/vcpkg/build.h
+++ b/toolsrc/include/vcpkg/build.h
@@ -270,6 +270,9 @@ namespace vcpkg::Build
         std::string key;
         std::string value;
 
+        AbiEntry() = default;
+        AbiEntry(const std::string& key, const std::string& value) : key(key), value(value) {}
+
         bool operator<(const AbiEntry& other) const
         {
             return key < other.key || (key == other.key && value < other.value);