From 4218bfe7668d55e36814d6bdcec2da40454025c1 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 20 May 2016 23:25:45 +0200
Subject: Initial VC++ support (static libraries only)

---
 build2/cxx/utility.cxx | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

(limited to 'build2/cxx/utility.cxx')

diff --git a/build2/cxx/utility.cxx b/build2/cxx/utility.cxx
index 15980d4..0f4eb08 100644
--- a/build2/cxx/utility.cxx
+++ b/build2/cxx/utility.cxx
@@ -12,6 +12,66 @@ namespace build2
 {
   namespace cxx
   {
+    // Return true if there is an option (stored in s).
+    //
+    bool
+    translate_std (scope& rs, const string& cid, const value& val, string& s)
+    {
+      const string& v (cast<string> (val));
+
+      if (cid == "msvc")
+      {
+        // C++ standard-wise, with VC++ you get what you get. The question is
+        // whether we should verify that the requested standard is provided by
+        // this VC++ version. And if so, from which version should we say VC++
+        // supports 11, 14, and 17? We should probably be as loose as possible
+        // here since the author will always be able to tighten (but not
+        // loosen) this in the buildfile (i.e., detect unsupported versions).
+        //
+        // For now we are not going to bother doing this for C++03.
+        //
+        if (v != "98" && v != "03")
+        {
+          uint64_t cver (cast<uint64_t> (rs["cxx.version.major"]));
+
+          // @@ Is mapping for 14 and 17 correct? Maybe Update 2 for 14?
+          //
+          if ((v == "11" && cver <= 16) || // C++11 since VS2010/10.0.
+              (v == "14" && cver <= 19) || // C++14 since VS2015/14.0.
+              (v == "17" && cver <= 20))   // C++17 since VS20??/15.0.
+          {
+            fail << "C++" << v << " is not supported by "
+                 << cast<string> (rs["cxx.signature"]) <<
+              info << "required by " << rs.out_path ();
+          }
+        }
+
+        return false;
+      }
+      else
+      {
+        // Translate 11 to 0x, 14 to 1y, and 17 to 1z for compatibility with
+        // older versions of the compilers.
+        //
+        s = "-std=";
+
+        if (v == "98")
+          s += "c++98";
+        else if (v == "03")
+          s += "c++03";
+        else if (v == "11")
+          s += "c++0x";
+        else if (v == "14")
+          s += "c++1y";
+        else if (v == "17")
+          s += "c++1z";
+        else
+          s += v; // In case the user specifies something like 'gnu++17'.
+
+        return true;
+      }
+    }
+
     void
     append_lib_options (cstrings& args, target& l, const char* var)
     {
-- 
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