Subject: bug#28415: build failure on macOS 10.9.5

From: Tak Kunihiro <[email-masked]>
Date: Mon, 11 Sep 2017 15:59:44 +0900

I cannot compile emacs.git under macOS 10.9.5.
I confirm that I can compile emacs-25.2.tar.gz on my environment.
Can you give me suggestions?

I want to test the following commit.
 http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=79150f6086286294c9e5ed56df5b14c87129cde6

$ git clone https://git.savannah.gnu.org/git/emacs.git
$ cd emacs
$ make
…
nsterm.m:2059:46: error: use of undeclared identifier 'NSAppearanceNameVibrantDark'
                            appearanceNamed: NSAppearanceNameVibrantDark];
                                             ^
nsterm.m:7146:44: error: use of undeclared identifier 'NSAppearanceNameVibrantDark'
                          appearanceNamed: NSAppearanceNameVibrantDark];
                                           ^
2 errors generated.
make[1]: *** [nsterm.o] Error 1
make: *** [src] Error 2