[pkgsrc/trunk]: pkgsrc/mk subst.mk: Give hint abotu SUBST_NOOP_OK

[gdt <gdt%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/b36d542535ee
branches:  trunk
changeset: 433489:b36d542535ee
user:      gdt <gdt%pkgsrc.org@localhost>
date:      Tue Jun 02 23:37:25 2020 +0000

description:
subst.mk: Give hint abotu SUBST_NOOP_OK

Note that a typical reason to need this is using find to generate a
list of files.

diffstat:

 mk/subst.mk |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (19 lines):

diff -r 52d0f892a190 -r b36d542535ee mk/subst.mk
--- a/mk/subst.mk       Tue Jun 02 22:32:02 2020 +0000
+++ b/mk/subst.mk       Tue Jun 02 23:37:25 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: subst.mk,v 1.93 2020/05/16 19:02:32 rillig Exp $
+# $NetBSD: subst.mk,v 1.94 2020/06/02 23:37:25 gdt Exp $
 #
 # The subst framework replaces text in one or more files in the WRKSRC
 # directory. Packages can define several ``classes'' of replacements.
@@ -24,7 +24,8 @@
 # SUBST_NOOP_OK
 #      Whether it is ok to have patterns in SUBST_FILES that don't
 #      contain any of the patterns from SUBST_SED or SUBST_VARS and
-#      thus are not modified at all.
+#      thus are not modified at all.  (A typical cause of this is
+#      using find to generate a list of files.)
 #
 #      This setting only detects redundant filename patterns.  It does
 #      not detect redundant patterns in SUBST_SED.