fixes macOS autobuild (#5674)

* update macOS autobuild yaml

* updates */CMakeLists* for macOS autobuild compatibility

* "" a dir for cmake

* Un empty an empty EXTRA_INCDIR

* use a cmake operator

* Use the . dir to un-empty a string

* fix minutes timer in macos yaml

* test & skip instead of load & include

* disregard fractional part of minutes in mac yaml

* add another cmake test

* fix typo in mac yaml

* fix other part of same typo

* correct a filename in mac yaml

* test all include dirs

* fix of mac yaml

* mac:fix a path in yaml

* mac:and its antecedent

* options.h include a dir

* test __has_include (gcc 5.* & up & clang)

* remove a printf() in mac yaml

* mac:change a "" and an elseif() to else()

* fix a whitespace error

* fix 2 whitespace errors

* ZULU>UTC

* add a "UTC

* on the other side of the "

* mac:properly set default LOCAL_PREFIX in CACHE

* use of zsh subshells in macos yaml

* mac:remove some &&

* mac:remove some "

* mac:floating point divisors

* mac:use double paren (())

* mac:add a dir

* mac:floatize with decimal point

* mac:zsh -c certain lines

* remove a marker

rtgui/options.h

@@ -20,7 +20,12 @@
 
 #include <set>
 #include <vector>
+#if __has_include(<gtkmm/enums.h>)
 #include <gtkmm/enums.h>
+#else
+#include <gtkmm-3.0/gtkmm/enums.h>
+#endif
+
 #include "../rtengine/settings.h"
 #include <exception>