[groff] 14/19: Makefile.am: Add `.DELETE_ON_ERROR` target.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit 71e31708e66872ff0a6c3e915713e891c8bc0b3a
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Wed Sep 15 11:08:55 2021 +1000

    Makefile.am: Add `.DELETE_ON_ERROR` target.
    
    * Makefile.am: Add `.DELETE_ON_ERROR` special target; both GNU and
      FreeBSD make(1)s support it so maybe it will be portable enough.  This
      avoids, among other problems, a target appearing falsely up-to-date
      (often as an empty file) when the troff process generating it
      experiences an assertion failure.
---
 ChangeLog   | 8 ++++++++
 Makefile.am | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 3eb0f8e..f971653 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2021-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+       * Makefile.am: Add `.DELETE_ON_ERROR` special target; both GNU
+       and FreeBSD make(1)s support it so maybe it will be portable
+       enough.  This avoids, among other problems, a target appearing
+       falsely up-to-date (often as an empty file) when the troff
+       process generating it experiences an assertion failure.
+
 2021-09-12  G. Branden Robinson <g.branden.robinson@gmail.com>
 
        Since June 1991 if not earlier, groff (technically, the refer,
diff --git a/Makefile.am b/Makefile.am
index 9aea889..bbbe5f6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -719,6 +719,8 @@ BUILT_SOURCES += defs.h
 # Force generation of test-groff even though we don't ship it.
 BUILT_SOURCES += test-groff
 
+.DELETE_ON_ERROR:
+
 # if there is a name prefix we install the man pages by hand
 all: generate_man_files
 install-data-hook: install-prefix-man