Can use object files directly in targets.

backends.py

@@ -171,6 +171,12 @@ class Backend():
         for src in target.get_sources():
             if not self.environment.is_header(src):
                 obj_list.append(self.generate_single_compile(target, outfile, src, False, header_deps))
+        for obj in target.get_objects():
+            if isinstance(obj, str):
+                o = os.path.join(self.build_to_src, target.get_subdir(), obj)
+            else:
+                raise MesonException('Unknown data type in object list.')
+            obj_list.append(o)
         elem = self.generate_link(target, outfile, outname, obj_list)
         self.generate_shlib_aliases(target, self.get_target_dir(target), outfile, elem)
         self.processed_targets[name] = True

build.py

@@ -91,11 +91,12 @@ class IncludeDirs():
         return self.incdirs
 
 class BuildTarget():
-    def __init__(self, name, subdir, is_cross, sources, environment, kwargs):
+    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
         self.name = name
         self.subdir = subdir
         self.is_cross = is_cross
         self.sources = []
+        self.objects = []
         self.external_deps = []
         self.include_dirs = []
         self.link_targets = []
@@ -105,10 +106,19 @@ class BuildTarget():
         self.extra_args = {}
         self.generated = []
         self.process_sourcelist(sources)
+        self.process_objectlist(objects)
         self.process_kwargs(kwargs)
         if len(self.sources) == 0 and len(self.generated) == 0:
             raise InvalidArguments('Build target %s has no sources.' % name)
 
+    def process_objectlist(self, objects):
+        assert(isinstance(objects, list))
+        for s in objects:
+            if isinstance(s, str):
+                self.objects.append(s)
+            else:
+                raise InvalidArguments('Bad object in target %s.' % self.name)
+
     def process_sourcelist(self, sources):
         if not isinstance(sources, list):
             sources = [sources]
@@ -215,6 +225,9 @@ class BuildTarget():
     def get_sources(self):
         return self.sources
 
+    def get_objects(self):
+        return self.objects
+
     def get_generated_sources(self):
         return self.generated
 
@@ -386,8 +399,8 @@ class GeneratedList():
         return self.generator
 
 class Executable(BuildTarget):
-    def __init__(self, name, subdir, is_cross, sources, environment, kwargs):
-        super().__init__(name, subdir, is_cross, sources, environment, kwargs)
+    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
+        super().__init__(name, subdir, is_cross, sources, objects, environment, kwargs)
         suffix = environment.get_exe_suffix()
         if suffix != '':
             self.filename = self.name + '.' + suffix
@@ -396,14 +409,14 @@ class Executable(BuildTarget):
 
 
 class StaticLibrary(BuildTarget):
-    def __init__(self, name, subdir, is_cross, sources, environment, kwargs):
-        super().__init__(name, subdir, is_cross, sources, environment, kwargs)
+    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
+        super().__init__(name, subdir, is_cross, sources, objects, environment, kwargs)
         prefix = environment.get_static_lib_prefix()
         suffix = environment.get_static_lib_suffix()
         self.filename = prefix + self.name + '.' + suffix
 
 class SharedLibrary(BuildTarget):
-    def __init__(self, name, subdir, is_cross, sources, environment, kwargs):
+    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
         self.version = None
         self.soversion = None
         super().__init__(name, subdir, is_cross, sources, environment, kwargs);

interpreter.py

@@ -312,23 +312,23 @@ class Man(InterpreterObject):
         return self.sources
 
 class BuildTargetHolder(InterpreterObject):
-    def __init__(self, targetttype, name, subdir, is_cross, sources, environment, kwargs):
-        self.target = targetttype(name, subdir, is_cross, sources, environment, kwargs)
+    def __init__(self, targetttype, name, subdir, is_cross, sources, objects, environment, kwargs):
+        self.target = targetttype(name, subdir, is_cross, sources, objects, environment, kwargs)
     
     def is_cross(self):
         return self.target.is_cross()
 
 class ExecutableHolder(BuildTargetHolder):
-    def __init__(self, name, subdir, is_cross, sources, environment, kwargs):
-        super().__init__(build.Executable, name, subdir, is_cross, sources, environment, kwargs)
+    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
+        super().__init__(build.Executable, name, subdir, is_cross, sources, objects, environment, kwargs)
 
 class StaticLibraryHolder(BuildTargetHolder):
-    def __init__(self, name, subdir, is_cross, sources, environment, kwargs):
-        super().__init__(build.StaticLibrary, name, subdir, is_cross, sources, environment, kwargs)
+    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
+        super().__init__(build.StaticLibrary, name, subdir, is_cross, sources, objects, environment, kwargs)
 
 class SharedLibraryHolder(BuildTargetHolder):
-    def __init__(self, name, subdir, is_cross, sources, environment, kwargs):
-        super().__init__(build.SharedLibrary, name, subdir, is_cross, sources, environment, kwargs)
+    def __init__(self, name, subdir, is_cross, sources, objects, environment, kwargs):
+        super().__init__(build.SharedLibrary, name, subdir, is_cross, sources, objects, environment, kwargs)
 
 class Test(InterpreterObject):
     def __init__(self, name, exe, is_parallel, cmd_args, env):
@@ -985,10 +985,13 @@ class Interpreter():
         except KeyError:
             kw_src = []
         sources += kw_src
+        objs = self.flatten(kwargs.get('objects', []))
+        if not isinstance(objs, list):
+            objs = [objs]
         if name in self.build.targets:
             raise InvalidCode('Tried to create target "%s", but a target of that name already exists.' % name)
         self.check_sources_exist(os.path.join(self.environment.source_dir, self.subdir), sources)
-        l = targetclass(name, self.subdir, is_cross, sources, self.environment, kwargs)
+        l = targetclass(name, self.subdir, is_cross, sources, objs, self.environment, kwargs)
         self.build.targets[name] = l.target
         if self.environment.is_cross_build() and l.is_cross:
             txt = ' cross build '

test cases/prebuilt object/1 basic/main.c

@@ -0,0 +1,5 @@
+int func();
+
+int main(int argc, char **argv) {
+    return func() == 42 ? 0 : 99;
+}

test cases/prebuilt object/1 basic/meson.build

@@ -0,0 +1,19 @@
+# This test is on its own because it is special.
+# To run the test you need the prebuilt object
+# file for the given platform.
+#
+# Combined with cross compilation this would make
+# the state space explode so let's just keep this
+# in its own subdir so it's not run during cross
+# compilation tests.
+
+project('prebuilt object', 'c')
+
+object = 'linux-amd64.o'
+
+# Remember: do not put source.c in this
+# declaration. Only the prebuilt object. 
+e = executable('prog', 'main.c',
+objects : object)
+
+test('objtest', e)

test cases/prebuilt object/1 basic/source.c

@@ -0,0 +1,8 @@
+/*
+ * Compile this manually on new platforms and add the
+ * object file to revision control and Meson configuration.
+ */
+
+int func() {
+    return 42;
+}