Python config leaks _NETBSD_SOURCE into the build, so ensure it is

provided consistently to undo damage. Spell C++11 mode canonically.

graphics/mypaint/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.47 2020/05/19 12:09:08 nia Exp $
+# $NetBSD: Makefile,v 1.48 2020/05/30 20:46:09 joerg Exp $
 
 DISTNAME=	mypaint-2.0.0
 PKGREVISION=	4
@@ -18,7 +18,6 @@ TOOL_DEPENDS+=	swig3-[0-9]*:../../devel/swig3
 
 EGG_NAME=	MyPaint-${PKGVERSION_NOREV}a0
 
-
 USE_LANGUAGES=	c c++
 
 USE_TOOLS+=	bash:run msgfmt pkg-config

graphics/mypaint/distinfo

@@ -1,7 +1,8 @@
-$NetBSD: distinfo,v 1.10 2020/03/04 13:51:51 wiz Exp $
+$NetBSD: distinfo,v 1.11 2020/05/30 20:46:09 joerg Exp $
 
 SHA1 (mypaint-2.0.0.tar.xz) = 334fa13893d20c80805092de665dbbcf03b92ece
 RMD160 (mypaint-2.0.0.tar.xz) = 894b276a4f6139a717d8fdfcf8618ecef00222dd
 SHA512 (mypaint-2.0.0.tar.xz) = 118d905f4d7ce6adb9779b59d6b3f51b94a9937778b8fe3ed1b31c9b5b77d63110134bdc74849a91d8095e905664227ff43ffe183ad9c7c7ba18fa954ade8a84
 Size (mypaint-2.0.0.tar.xz) = 7316680 bytes
 SHA1 (patch-lib_meta.py) = 1c8832ff06154255d7ea14037dc728d1fa0ba50e
+SHA1 (patch-setup.py) = 55b5c2ef1ef8612999c1630b2259f7f54a5cf264

graphics/mypaint/patches/patch-setup.py

@@ -0,0 +1,26 @@
+$NetBSD: patch-setup.py,v 1.1 2020/05/30 20:46:09 joerg Exp $
+
+Don't force pure standard mode as it depends on various extensions
+anyway. Explicitly set _NETBSD_SOURCE since Python's config.h pollutes
+the namespace with it.
+
+--- setup.py.orig	2020-02-15 15:05:23.000000000 +0000
++++ setup.py
+@@ -801,7 +801,7 @@ def get_ext_modules():
+     import numpy
+ 
+     extra_compile_args = [
+-        '--std=c++11',
++        '-std=gnu++11',
+         '-Wall',
+         '-Wno-sign-compare',
+         '-Wno-write-strings',
+@@ -821,6 +821,8 @@ def get_ext_modules():
+         # Look up libraries dependencies relative to the library.
+         extra_link_args.append('-Wl,-z,origin')
+         extra_link_args.append('-Wl,-rpath,$ORIGIN')
++    if sys.platform.startswith("netbsd"):
++        extra_compile_args.append("-D_NETBSD_SOURCE")
+ 
+     initial_deps = ["libmypaint >= 1.5"]
+     remaining_deps = [