xcode-backend: add implicit includes

Move helper functions get_source_dir_include_args and
get_build_dir_include_args to backend base class

mesonbuild/backend/backends.py

@@ -248,6 +248,17 @@ class Backend:
             return self.environment.coredata.validate_option_value(option_name, override)
         return self.environment.coredata.get_option(option_name.evolve(subproject=target.subproject))
 
+    def get_source_dir_include_args(self, target, compiler):
+        curdir = target.get_subdir()
+        tmppath = os.path.normpath(os.path.join(self.build_to_src, curdir))
+        return compiler.get_include_args(tmppath, False)
+
+    def get_build_dir_include_args(self, target, compiler):
+        curdir = target.get_subdir()
+        if curdir == '':
+            curdir = '.'
+        return compiler.get_include_args(curdir, False)
+
     def get_target_filename_for_linking(self, target):
         # On some platforms (msvc for instance), the file that is used for
         # dynamic linking is not the same as the dynamic library itself. This

mesonbuild/backend/ninjabackend.py

@@ -2334,17 +2334,6 @@ https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47485'''))
         self.add_build(element)
         return (rel_obj, rel_src)
 
-    def get_source_dir_include_args(self, target, compiler):
-        curdir = target.get_subdir()
-        tmppath = os.path.normpath(os.path.join(self.build_to_src, curdir))
-        return compiler.get_include_args(tmppath, False)
-
-    def get_build_dir_include_args(self, target, compiler):
-        curdir = target.get_subdir()
-        if curdir == '':
-            curdir = '.'
-        return compiler.get_include_args(curdir, False)
-
     @lru_cache(maxsize=None)
     def get_normpath_target(self, source) -> str:
         return os.path.normpath(source)

mesonbuild/backend/xcodebackend.py

@@ -738,7 +738,6 @@ class XCodeBackend(backends.Backend):
                 ldargs += self.build.get_project_link_args(linker, target.subproject, target.for_machine)
                 ldargs += self.build.get_global_link_args(linker, target.for_machine)
                 cargs = []
-                cargs.append('-I.')
                 for dep in target.get_external_deps():
                     cargs += dep.get_compile_args()
                     ldargs += dep.get_link_args()
@@ -756,8 +755,13 @@ class XCodeBackend(backends.Backend):
                     targs = target.get_extra_args(lang)
                     args = pargs + gargs + targs
                     if args:
-                        langargs[langnamemap[lang]] = args
-                        langargs[langnamemap[lang]] += cargs
+                        langname = langnamemap[lang]
+                        compiler = target.compilers.get(lang)
+                        lang_cargs = cargs
+                        if compiler and target.implicit_include_directories:
+                            lang_cargs += self.get_build_dir_include_args(target, compiler)
+                        langargs[langname] = args
+                        langargs[langname] += lang_cargs
                 symroot = os.path.join(self.environment.get_build_dir(), target.subdir)
                 self.write_line('%s /* %s */ = {' % (valid, buildtype))
                 self.indent_level += 1