Set group when installing, too

From a patch by Ulrich Mueller in:
https://lists.gnu.org/r/emacs-devel/2018-06/msg00687.html
* Makefile.in (set_installuser): Also set the group, in order
to match install(1) behavior.  Also, don’t clutter stderr
with a diagnostic if ‘id’ is missing.

1 files changed, 4 insertions, 2 deletions

diff --git a/Makefile.in b/Makefile.in
index 52d44d9708f..4d7627ba09d 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -516,9 +516,11 @@ INSTALL_ARCH_INDEP_EXTRA = @INSTALL_ARCH_INDEP_EXTRA@
 ## https://lists.gnu.org/r/emacs-devel/2007-10/msg01672.html
 ## Needs to be the user running install, so configure can't set it.
 set_installuser=for installuser in $${LOGNAME} $${USERNAME} $${USER} \
-          `id -un 2> /dev/null`; do \
+          `(id -u) 2> /dev/null`; do \
           [ -n "$${installuser}" ] && break ; \
-        done
+        done; \
+        installgroup=`(id -g) 2>/dev/null` && [ -n "$$installgroup" ] && \
+          installuser=$$installuser:$$installgroup
 
 ### Install the files that are machine-independent.
 ### Most of them come straight from the distribution; the exception is