runtime: New package that mirrors Go's runtime (stub)

Only runtime.OS and runtime.CC for now - exposed as strings from
runtime/platform.h ifdefs.

MANIFEST.in

@@ -3,6 +3,8 @@ include golang/libgolang.h
 include golang/runtime/libgolang.cpp
 include golang/runtime/libpyxruntime.cpp
 include golang/runtime/platform.h
+include golang/runtime.h
+include golang/runtime.cpp
 include golang/pyx/runtime.h
 include golang/pyx/testprog/golang_dso_user/dsouser/dso.h
 include golang/pyx/testprog/golang_dso_user/dsouser/dso.cpp

golang/pyx/build.py

@@ -212,6 +212,7 @@ def _with_build_defaults(name, kw):   # -> (pygo, kw')
     dependv = kw.get('depends', [])[:]
     dependv.extend(['%s/golang/%s' % (pygo, _) for _ in [
         'libgolang.h',
+        'runtime.h',
         'runtime/internal.h',
         'runtime/internal/atomic.h',
         'runtime/internal/syscall.h',

golang/runtime.cpp

+// Copyright (C) 2023-2024  Nexedi SA and Contributors.
+//                          Kirill Smelkov <kirr@nexedi.com>
+//
+// This program is free software: you can Use, Study, Modify and Redistribute
+// it under the terms of the GNU General Public License version 3, or (at your
+// option) any later version, as published by the Free Software Foundation.
+//
+// You can also Link and Combine this program with other software covered by
+// the terms of any of the Free Software licenses or any of the Open Source
+// Initiative approved licenses and Convey the resulting work. Corresponding
+// source of such a combination shall include the source code for all other
+// software used.
+//
+// This program is distributed WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+//
+// See COPYING file for full licensing terms.
+// See https://www.nexedi.com/licensing for rationale and options.
+
+// Package runtime mirrors Go package runtime.
+// See runtime.h for package overview.
+
+#include "golang/runtime.h"
+
+
+// golang::runtime::
+namespace golang {
+namespace runtime {
+
+const string OS =
+#ifdef LIBGOLANG_OS_linux
+    "linux"
+#elif defined(LIBGOLANG_OS_darwin)
+    "darwin"
+#elif defined(LIBGOLANG_OS_windows)
+    "windows"
+#else
+# error
+#endif
+    ;
+
+
+const string CC =
+#ifdef LIBGOLANG_CC_gcc
+    "gcc"
+#elif defined(LIBGOLANG_CC_clang)
+    "clang"
+#elif defined(LIBGOLANG_CC_msc)
+    "msc"
+#else
+# error
+#endif
+    ;
+
+
+}}  // golang::runtime::

golang/runtime.h

+#ifndef _NXD_LIBGOLANG_RUNTIME_H
+#define _NXD_LIBGOLANG_RUNTIME_H
+
+// Copyright (C) 2023-2024  Nexedi SA and Contributors.
+//                          Kirill Smelkov <kirr@nexedi.com>
+//
+// This program is free software: you can Use, Study, Modify and Redistribute
+// it under the terms of the GNU General Public License version 3, or (at your
+// option) any later version, as published by the Free Software Foundation.
+//
+// You can also Link and Combine this program with other software covered by
+// the terms of any of the Free Software licenses or any of the Open Source
+// Initiative approved licenses and Convey the resulting work. Corresponding
+// source of such a combination shall include the source code for all other
+// software used.
+//
+// This program is distributed WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+//
+// See COPYING file for full licensing terms.
+// See https://www.nexedi.com/licensing for rationale and options.
+
+// Package runtime mirrors Go package runtime.
+
+#include "golang/libgolang.h"
+
+
+// golang::runtime::
+namespace golang {
+namespace runtime {
+
+// OS indicates operating system, that is running the program.
+//
+// e.g. "linux", "darwin", "windows", ...
+extern LIBGOLANG_API const string OS;
+
+// CC indicates C/C++ compiler, that compiled the program.
+//
+// e.g. "gcc", "clang", "msc", ...
+extern LIBGOLANG_API const string CC;
+
+
+}} // golang::runtime::
+
+#endif  // _NXD_LIBGOLANG_RUNTIME_H

setup.py

@@ -227,6 +227,7 @@ setup(
                         ['golang/runtime/libgolang.cpp',
                          'golang/runtime/internal/atomic.cpp',
                          'golang/runtime/internal/syscall.cpp',
+                         'golang/runtime.cpp',
                          'golang/context.cpp',
                          'golang/errors.cpp',
                          'golang/fmt.cpp',
@@ -238,6 +239,7 @@ setup(
                          'golang/time.cpp'],
                         depends = [
                             'golang/libgolang.h',
+                            'golang/runtime.h',
                             'golang/runtime/internal.h',
                             'golang/runtime/internal/atomic.h',
                             'golang/runtime/internal/syscall.h',