[src/trunk]: src/usr.bin/make Avoid full path meta file names for subdir of ....

[sjg <sjg%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9f1fe8684af3
branches:  trunk
changeset: 355711:9f1fe8684af3
user:      sjg <sjg%NetBSD.org@localhost>
date:      Thu Aug 10 21:07:48 2017 +0000

description:
Avoid full path meta file names for subdir of .OBJDIR

diffstat:

 usr.bin/make/meta.c |  13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diffs (36 lines):

diff -r 1e741043518c -r 9f1fe8684af3 usr.bin/make/meta.c
--- a/usr.bin/make/meta.c       Thu Aug 10 20:43:12 2017 +0000
+++ b/usr.bin/make/meta.c       Thu Aug 10 21:07:48 2017 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: meta.c,v 1.68 2017/07/09 04:54:00 sjg Exp $ */
+/*      $NetBSD: meta.c,v 1.69 2017/08/10 21:07:48 sjg Exp $ */
 
 /*
  * Implement 'meta' mode.
@@ -246,6 +246,8 @@
     char *rp;
     char *cp;
     char *tp;
+    char *dtp;
+    size_t ldname;
 
     /*
      * Weed out relative paths from the target file name.
@@ -282,10 +284,15 @@
     }
     /* on some systems dirname may modify its arg */
     tp = bmake_strdup(tname);
-    if (strcmp(dname, dirname(tp)) == 0)
+    dtp = dirname(tp);
+    if (strcmp(dname, dtp) == 0)
        snprintf(mname, mnamelen, "%s.meta", tname);
     else {
-       snprintf(mname, mnamelen, "%s/%s.meta", dname, tname);
+       ldname = strlen(dname);
+       if (strncmp(dname, dtp, ldname) == 0 && dtp[ldname] == '/')
+           snprintf(mname, mnamelen, "%s/%s.meta", dname, &tname[ldname+1]);
+       else
+           snprintf(mname, mnamelen, "%s/%s.meta", dname, tname);
 
        /*
         * Replace path separators in the file name after the