From 9975807ea9304493f584881deb0f06e735cebf31 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 31 Aug 2018 19:39:16 +0200
Subject: Dump basic information about each module interface being compiled

Run as:

$ b --match-only -s
---
 build2/cc/compile-rule.cxx | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/build2/cc/compile-rule.cxx b/build2/cc/compile-rule.cxx
index 7a50170..3660943 100644
--- a/build2/cc/compile-rule.cxx
+++ b/build2/cc/compile-rule.cxx
@@ -6,6 +6,7 @@
 
 #include <cstdlib>  // exit()
 #include <cstring>  // strlen()
+#include <iostream> // cout
 
 #include <build2/file.hxx>
 #include <build2/depdb.hxx>
@@ -964,6 +965,23 @@ namespace build2
             }
           }
 
+          if (tu.type () == translation_type::module_iface)
+          {
+            cout << tu.mod.name << ' '
+                 << src.path ().string () << ' '
+                 << cid;
+
+            cstrings ops;
+            append_options (ops, tstd);
+            append_options (ops, t, c_poptions);
+            append_options (ops, t, x_poptions);
+
+            for (const char* o: ops)
+              cout << ' ' << o;
+
+            cout << endl;
+          }
+
           md.type = tu.type ();
 
           // Extract the module dependency information in addition to header
-- 
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