From 9e92edb4fb04f8584a4900857bd86758e62f3099 Mon Sep 17 00:00:00 2001
From: Richard Kenner <kenner@gcc.gnu.org>
Date: Tue, 5 Oct 1993 16:04:55 -0400
Subject: [PATCH] (rescan): Don't expand an identifier after a '#'.

From-SVN: r5611
---
 gcc/cccp.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/gcc/cccp.c b/gcc/cccp.c
index ebd8416b931..e1a654e34e3 100644
--- a/gcc/cccp.c
+++ b/gcc/cccp.c
@@ -2465,6 +2465,15 @@ do { ip = &instack[indepth];		\
 	  break;
 	}
 	++obp;		/* Copy the '#' after all */
+	/* Don't expand an identifier that could be a macro directive.
+	   (Section 3.8.3 of the ANSI C standard)			*/
+	SKIP_WHITE_SPACE (ibp);
+	if (is_idstart[*ibp])
+	  {
+	    *obp++ = *ibp++;
+	    while (is_idchar[*ibp])
+	      *obp++ = *ibp++;
+	  }
 	goto randomchar;
       }
 #ifdef USE_C_ALLOCA
-- 
2.30.2