Can build Python extension on OSX.

mesonbuild/build.py

@@ -46,6 +46,7 @@ known_shlib_kwargs = known_basic_kwargs.copy()
 known_shlib_kwargs.update({'version' : True,
                            'soversion' : True,
                            'name_prefix' : True,
+                           'name_suffix' : True,
                            })
 
 backslash_explanation = \
@@ -415,9 +416,20 @@ class BuildTarget():
         self.resources = resources
         if 'name_prefix' in kwargs:
             name_prefix = kwargs['name_prefix']
-            if not isinstance(name_prefix, str):
+            if isinstance(name_prefix, list):
+                if len(name_prefix) != 0:
+                    raise InvalidArguments('Array must be empty to signify null.')
+            elif not isinstance(name_prefix, str):
                 raise InvalidArguments('Name prefix must be a string.')
             self.prefix = name_prefix
+        if 'name_suffix' in kwargs:
+            name_suffix = kwargs['name_suffix']
+            if isinstance(name_suffix, list):
+                if len(name_suffix) != 0:
+                    raise InvalidArguments('Array must be empty to signify null.')
+            elif not isinstance(name_suffix, str):
+                raise InvalidArguments('Name suffix must be a string.')
+            self.suffix = name_suffix
 
     def get_subdir(self):
         return self.subdir
@@ -684,14 +696,17 @@ class SharedLibrary(BuildTarget):
         super().__init__(name, subdir, subproject, is_cross, sources, objects, environment, kwargs);
         if len(self.sources) > 0 and self.sources[0].endswith('.cs'):
             prefix = 'lib'
-            self.suffix = 'dll'
+            suffix = 'dll'
         else:
             prefix = environment.get_shared_lib_prefix()
-            self.suffix = environment.get_shared_lib_suffix()
+            suffix = environment.get_shared_lib_suffix()
         if not hasattr(self, 'prefix'):
             self.prefix = prefix
+        if not hasattr(self, 'suffix'):
             if len(self.sources) > 0 and self.sources[0].endswith('.rs'):
                 self.suffix = 'rlib'
+            else:
+                self.suffix = suffix
         self.importsuffix = environment.get_import_lib_suffix()
         self.filename = self.prefix + self.name + '.' + self.suffix
 

mesonbuild/dependencies.py

@@ -1077,6 +1077,7 @@ class ThreadDependency(Dependency):
 class Python3Dependency(Dependency):
     def __init__(self, environment, kwargs):
         super().__init__()
+        self.name = 'python3'
         self.is_found = False
         try:
             pkgdep = PkgConfigDependency('python3', environment, kwargs)
@@ -1100,6 +1101,14 @@ class Python3Dependency(Dependency):
                 self.libs = ['-L{}/libs'.format(basedir),
                              '-lpython{}'.format(vernum)]
                 self.is_found = True
+            elif mesonlib.is_osx():
+                # In OSX the Python 3 framework does not have a version
+                # number in its name.
+                fw = ExtraFrameworkDependency('python', False)
+                if fw.found():
+                    self.cargs = fw.get_compile_args()
+                    self.libs = fw.get_link_args()
+                    self.is_found = True
         if self.is_found:
             mlog.log('Dependency', mlog.bold(self.name), 'found:', mlog.green('YES'))
         else:

test cases/python3/2 extmodule/ext/meson.build

@@ -1,6 +1,14 @@
+if host_machine.system() == 'darwin'
+  # Default suffix is 'dylib' but Python does not use for extensions.
+  suffix = 'so'
+else
+  suffix = []
+endif
+
 pylib = shared_library('tachyon',
   'tachyon_module.c',
   dependencies : py3_dep,
-  name_prefix : '')
+  name_prefix : '',
+  name_suffix : suffix)
 
 pypathdir = meson.current_build_dir()