A few sysconf fixes.

mesonbuild/coredata.py

@@ -216,6 +216,10 @@ builtin_options = {
     # uses that. Instead they always set it manually to /etc. This default
     # value is thus pointless and not really used but we set it to this
     # for consistency with other systems.
+    #
+    # Projects installing to sysconfdir probably want to set the following in project():
+    #
+    # default_options : ['sysconfdir=/etc']
         'sysconfdir'        : [ UserStringOption, 'Sysconf data directory.', 'etc' ],
         'werror'            : [ UserBooleanOption, 'Treat warnings as errors.', False ],
         'warning_level'     : [ UserComboOption, 'Compiler warning level to use.', [ '1', '2', '3' ], '1'],

mesonbuild/mconf.py

@@ -165,7 +165,16 @@ class Conf:
         print('')
         print('Directories:')
         parr = []
-        for key in [ 'prefix', 'libdir', 'libexecdir', 'bindir', 'includedir', 'datadir', 'mandir', 'localedir' ]:
+        for key in ['prefix',
+                    'libdir',
+                    'libexecdir',
+                    'bindir',
+                    'includedir',
+                    'datadir',
+                    'mandir',
+                    'localedir',
+                    'sysconfdir',
+                ]:
             parr.append([key, coredata.get_builtin_option_description(key),
                 self.coredata.get_builtin_option(key), coredata.get_builtin_option_choices(key)])
         self.print_aligned(parr)