mark a bunch of dependencies with the version they were introduced

All these dependencies are impossible to find on versions of Meson older
than the ones they got custom lookups in, because they don't provide
pkg-config files. So they should not / cannot be reasonably used on
older versions, and it is easy to say "yep, these should emit a
FeatureNew for the versions they got added in".

mesonbuild/dependencies/dev.py

@@ -500,6 +500,7 @@ class ZlibSystemDependency(SystemDependency):
 class JDKSystemDependency(SystemDependency):
     def __init__(self, environment: 'Environment', kwargs: T.Dict[str, T.Any]):
         super().__init__('jdk', environment, kwargs)
+        self.feature_since = ('0.59.0', '')
 
         m = self.env.machines[self.for_machine]
 

mesonbuild/dependencies/misc.py

@@ -63,6 +63,7 @@ def netcdf_factory(env: 'Environment',
 class DlBuiltinDependency(BuiltinDependency):
     def __init__(self, name: str, env: 'Environment', kwargs: T.Dict[str, T.Any]):
         super().__init__(name, env, kwargs)
+        self.feature_since = ('0.62.0', "consider checking for dlopen() with and without find_library('dl')")
 
         if self.clib_compiler.has_function('dlopen', '#include <dlfcn.h>', env)[0]:
             self.is_found = True
@@ -71,6 +72,7 @@ class DlBuiltinDependency(BuiltinDependency):
 class DlSystemDependency(SystemDependency):
     def __init__(self, name: str, env: 'Environment', kwargs: T.Dict[str, T.Any]):
         super().__init__(name, env, kwargs)
+        self.feature_since = ('0.62.0', "consider checking for dlopen() with and without find_library('dl')")
 
         h = self.clib_compiler.has_header('dlfcn.h', '', env)
         self.link_args = self.clib_compiler.find_library('dl', env, [], self.libtype)
@@ -470,6 +472,7 @@ class CursesSystemDependency(SystemDependency):
 class IconvBuiltinDependency(BuiltinDependency):
     def __init__(self, name: str, env: 'Environment', kwargs: T.Dict[str, T.Any]):
         super().__init__(name, env, kwargs)
+        self.feature_since = ('0.60.0', "consider checking for iconv_open() with and without find_library('iconv')")
         code = '''#include <iconv.h>\n\nint main() {\n    iconv_open("","");\n}''' # [ignore encoding] this is C, not python, Mr. Lint
 
         if self.clib_compiler.links(code, env)[0]:
@@ -479,6 +482,7 @@ class IconvBuiltinDependency(BuiltinDependency):
 class IconvSystemDependency(SystemDependency):
     def __init__(self, name: str, env: 'Environment', kwargs: T.Dict[str, T.Any]):
         super().__init__(name, env, kwargs)
+        self.feature_since = ('0.60.0', "consider checking for iconv_open() with and without find_library('iconv')")
 
         h = self.clib_compiler.has_header('iconv.h', '', env)
         self.link_args = self.clib_compiler.find_library('iconv', env, [], self.libtype)
@@ -490,6 +494,7 @@ class IconvSystemDependency(SystemDependency):
 class IntlBuiltinDependency(BuiltinDependency):
     def __init__(self, name: str, env: 'Environment', kwargs: T.Dict[str, T.Any]):
         super().__init__(name, env, kwargs)
+        self.feature_since = ('0.59.0', "consider checking for ngettext() with and without find_library('intl')")
         code = '''#include <libintl.h>\n\nint main() {\n    gettext("Hello world");\n}'''
 
         if self.clib_compiler.links(code, env)[0]:
@@ -499,6 +504,7 @@ class IntlBuiltinDependency(BuiltinDependency):
 class IntlSystemDependency(SystemDependency):
     def __init__(self, name: str, env: 'Environment', kwargs: T.Dict[str, T.Any]):
         super().__init__(name, env, kwargs)
+        self.feature_since = ('0.59.0', "consider checking for ngettext() with and without find_library('intl')")
 
         h = self.clib_compiler.has_header('libintl.h', '', env)
         self.link_args = self.clib_compiler.find_library('intl', env, [], self.libtype)