From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Tue, 15 Jun 2021 00:13:08 +0000 (-0700)
Subject: add an explanation of the semi-colon on Makefile rule
X-Git-Tag: 2.47.3~1^2~1
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=45ee2da9915d8b10db22d49d228123b298a8113a;p=graphviz

add an explanation of the semi-colon on Makefile rule
---

diff --git a/tclpkg/gv/Makefile.am b/tclpkg/gv/Makefile.am
index 14d7221f6..42e119319 100644
--- a/tclpkg/gv/Makefile.am
+++ b/tclpkg/gv/Makefile.am
@@ -433,6 +433,8 @@ else
 pdf =
 endif
 
+# this rule has a trailing semi-colon for the Make cache to work correctly
+# https://stackoverflow.com/questions/37873522/unreliable-parallel-builds-in-a-makefile-with-intermediate
 $(man): gv_doc_writer.intermediate ;
 
 .INTERMEDIATE: gv_doc_writer.intermediate