Add a "preprocessing" flag, so that the expression evaluator can

take the semantic differences into account (a undefined symbol
behaves differently in a C parse tree than in a preprocessor
expression)

1 files changed, 1 insertions, 0 deletions

diff --git a/token.h b/token.h
index db61c06..21db2aa 100644
--- a/token.h
+++ b/token.h
@@ -134,6 +134,7 @@ struct token {
  * This allows us to not test for NULL pointers
  * when following the token->next chain..
  */
+extern int preprocessing;
 extern struct token eof_token_entry;
 #define eof_token(x) ((x) == &eof_token_entry)