Enable GUI Emacs without 'make install' on macOS (Bug #27645)

* nextstep/INSTALL: Correct it, and mention that Emacs can be run
from 'src/emacs'.

* src/nsterm.m (applicationDidFinishLaunching:): When Emacs is
launched outside of a macOS application bundle, change its
activation policy from the default 'prohibited' to 'regular'.

; * etc/NEWS: Mention the change on macOS.

1 files changed, 12 insertions, 4 deletions

diff --git a/nextstep/INSTALL b/nextstep/INSTALL
index 799cd4d866a..b7e84e018ee 100644
--- a/nextstep/INSTALL
+++ b/nextstep/INSTALL
@@ -21,15 +21,23 @@ In the top-level directory, use:
 
 (On macOS, --with-ns is enabled by default.)
 
-This will compile all the files, but emacs will not be able to be run except
-in -nw (terminal) mode.
+Then run:
 
-In order to run Emacs.app, you must run:
+  make
+
+This will compile all the files.
+
+In order to run Emacs, you must run:
+
+  src/emacs
+
+In order to install Emacs, you must run:
 
   make install
 
 This will assemble the app in nextstep/Emacs.app (i.e., the --prefix
-argument has no effect in this case).
+argument has no effect in this case).  You can then move the Emacs.app
+bundle to a location of your choice.
 
 If you pass the --disable-ns-self-contained option to configure, the lisp
 files will be installed under whatever 'prefix' is set to (defaults to