Fix Makefile subshell output when run in parallel

For discussion, see the following thread:
https://lists.gnu.org/r/emacs-devel/2021-03/msg00255.html

* Makefile.in (texi_misc): Avoid interspersing parallel Make output
with that from subshell.

diff --git a/Makefile.in b/Makefile.in
index 856c29a453e7631a05394761b0a48b143721b9d0..0e16145c0a42c770d79aa7fc9ee7f7075f12f0f8 100644 (file)
--- a/Makefile.in
+++ b/Makefile.in
@@ -1008,7 +1008,7 @@ misc-dvi misc-html misc-pdf misc-ps: src
 
 info-dir: ${srcdir}/info/dir
 
-texi_misc = $(shell ${MAKE} --no-print-directory -s -C doc/misc echo-sources)
+texi_misc = $(shell ${MAKE} --no-print-directory -O -s -C doc/misc echo-sources)
 
 srcdir_doc_info_dir_inputs = \
   ${srcdir}/doc/emacs/emacs.texi \