Add {c,cxx}.class variables

Compiler class describes a set of compilers that follow more or less
the same command line interface. Compilers that don't belong to any of
the existing classes are in classes of their own (say, Sun CC would be
on its own if we were to support it).

Currently defined compiler classes:

gcc          gcc, clang, clang-apple, icc (on non-Windows)
msvc         msvc, clang-cl, icc (Windows)

1 files changed, 17 insertions, 1 deletions

diff --git a/build2/cc/guess.cxx b/build2/cc/guess.cxx
index da5be97..627283f 100644
--- a/build2/cc/guess.cxx
+++ b/build2/cc/guess.cxx
@@ -18,7 +18,7 @@ namespace build2
     value () const -> value_type
     {
       if (type == "gcc")   return gcc;
-      if (type == "clang") return clang;
+      if (type == "clang") return variant.empty () ? clang : clang_apple;
       if (type == "msvc")  return msvc;
       if (type == "icc")   return icc;
 
@@ -26,6 +26,17 @@ namespace build2
       return gcc;
     }
 
+    string
+    to_string (compiler_class cl)
+    {
+      switch (cl)
+      {
+      case compiler_class::gcc:  return "gcc";
+      case compiler_class::msvc: return "msvc";
+      }
+      return string (); // Never reached.
+    }
+
     // Pre-guess the compiler type based on the compiler executable name.
     // Return empty string if can't make a guess (for example, because the
     // compiler name is a generic 'c++'). Note that it only guesses the type,
@@ -501,6 +512,7 @@ namespace build2
       return compiler_info {
         move (gr.path),
         move (gr.id),
+        compiler_class::gcc,
         move (v),
         move (gr.signature),
         move (gr.checksum), // Calculated on whole -v output.
@@ -617,6 +629,7 @@ namespace build2
       return compiler_info {
         move (gr.path),
         move (gr.id),
+        compiler_class::gcc,
         move (v),
         move (gr.signature),
         move (gr.checksum), // Calculated on whole -v output.
@@ -836,6 +849,7 @@ namespace build2
       return compiler_info {
         move (gr.path),
         move (gr.id),
+        compiler_class::gcc, //@@ TODO: msvc on Windows?
         move (v),
         move (gr.signature),
         cs.string (),
@@ -1059,6 +1073,7 @@ namespace build2
       return compiler_info {
         move (gr.path),
         move (gr.id),
+        compiler_class::msvc,
         move (v),
         move (gr.signature),
         cs.string (),
@@ -1107,6 +1122,7 @@ namespace build2
           break;
         }
       case compiler_id::clang:
+      case compiler_id::clang_apple:
         {
           assert (id.variant.empty () || id.variant == "apple");
           r = guess_clang (xl, xc, c_coptions, x_coptions, move (gr));