From 6bd285316c4bceb38d5a7e5e9967cc84302056b4 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 3 Nov 2023 14:56:31 +0200
Subject: Generalize and export cc::lexer

---
 libbuild2/cc/lexer.cxx | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'libbuild2/cc/lexer.cxx')

diff --git a/libbuild2/cc/lexer.cxx b/libbuild2/cc/lexer.cxx
index 467c0b1..96bd887 100644
--- a/libbuild2/cc/lexer.cxx
+++ b/libbuild2/cc/lexer.cxx
@@ -214,7 +214,7 @@ namespace build2
                   // #line <integer> [<string literal>] ...
                   // #     <integer> [<string literal>] ...
                   //
-                  // Also diagnose #include while at it.
+                  // Also diagnose #include while at it if preprocessed.
                   //
                   if (!(c >= '0' && c <= '9'))
                   {
@@ -222,10 +222,13 @@ namespace build2
 
                     if (t.type == type::identifier)
                     {
-                      if (t.value == "include")
-                        fail (l) << "unexpected #include directive";
-                      else if (t.value != "line")
+                      if (t.value != "line")
+                      {
+                        if (preprocessed_ && t.value == "include")
+                          fail (l) << "unexpected #include directive";
+
                         continue;
+                      }
                     }
                     else
                       continue;
-- 
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