From: Andrew Tridgell <tridge@samba.org>
Date: Wed, 27 Mar 2002 06:30:31 +0000 (+0100)
Subject: implemented the identargs idea from compilercache
X-Git-Tag: v1.0~32
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4101c3fd395a5e47f985ecb2e8763e410c1aec16;p=thirdparty%2Fccache.git

implemented the identargs idea from compilercache
---

diff --git a/ccache.c b/ccache.c
index cacecf3d3..27e2a4061 100644
--- a/ccache.c
+++ b/ccache.c
@@ -158,6 +158,26 @@ static void find_hash(ARGS *args)
 
 	/* first the arguments */
 	for (i=0;i<args->argc;i++) {
+		/* some arguments don't contribute to the hash. The
+		   theory is that these arguments will change the
+		   output of -E if they are going to have any effect
+		   at all, or they only affect linking */
+		if (i < args->argc-1) {
+			if (strcmp(args->argv[i], "-I") == 0 ||
+			    strcmp(args->argv[i], "-include") == 0 ||
+			    strcmp(args->argv[i], "-L") == 0 ||
+			    strcmp(args->argv[i], "-D") == 0 ||
+			    strcmp(args->argv[i], "-isystem") == 0) {
+				i++;
+				continue;
+			}
+			if (strncmp(args->argv[i], "-I", 2) == 0 ||
+			    strncmp(args->argv[i], "-L", 2) == 0 ||
+			    strncmp(args->argv[i], "-D", 2) == 0) {
+				continue;
+			}
+		}
+
 		hash_string(args->argv[i]);
 	}