[pkgsrc/trunk]: pkgsrc/lang/python34 Forward port patches from python27 for d...

[kamil <kamil%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/78b515af48a6
branches:  trunk
changeset: 352682:78b515af48a6
user:      kamil <kamil%pkgsrc.org@localhost>
date:      Sun Sep 18 12:36:41 2016 +0000

description:
Forward port patches from python27 for dlopen(3)

Original changes in python27/Makefile r1.62-r1.67
=================================================

Add an option for Python: x11

Fix dlopen(3) calls in _ctypes.so for X11BASE libraries

A Python code can dynamically load shared libraries and it's wrapped with
a plain dlopen(3) call. The holder of this interface (_ctypes module)
without rpath set to X11BASE cannot detect libs like 'GL'.

Fixing find_library() on POSIX-like (excluding Darwin) systems.

This isn't addressing Python's wrapper for dlopen(3).

This possibily addresses mostly NetBSD as other popular OSes have ldconfig.

Testing commands:

 - before applying the patch

>>> from ctypes.util import find_library
>>> find_library("m")
'libm.so.0'
>>> find_library("crypto")
'libcrypto.so.11'
>>> find_library("GL")
>>> find_library("curl")

 - after applying the patch
>>> from ctypes.util import find_library
>>> find_library("m")
'libm.so.0'
>>> find_library("crypto")
'libcrypto.so.11'
>>> find_library("GL")
'libGL.so.2'
>>> find_library("curl")
'libcurl.so.4'

This patch doesn't solve the case of custom dirs like $PREFIX/qt5/lib.
However it's solving most common cases of using this call.

A possible solution is to parse the output "pkg_info -La"... however it's
very slow. In other words a cache with libraries might be needed to handle
it efficiently.

diffstat:

 lang/python34/Makefile   |  23 ++++++++++++++++++++++-
 lang/python34/options.mk |  28 ++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+), 1 deletions(-)

diffs (73 lines):

diff -r 67db58577578 -r 78b515af48a6 lang/python34/Makefile
--- a/lang/python34/Makefile    Sun Sep 18 12:36:37 2016 +0000
+++ b/lang/python34/Makefile    Sun Sep 18 12:36:41 2016 +0000
@@ -1,8 +1,9 @@
-# $NetBSD: Makefile,v 1.16 2016/05/13 16:35:03 adam Exp $
+# $NetBSD: Makefile,v 1.17 2016/09/18 12:36:41 kamil Exp $
 
 .include "dist.mk"
 
 PKGNAME=       python34-${PY_DISTVERSION}
+PKGREVISION=   1
 CATEGORIES=    lang python
 
 MAINTAINER=    pkgsrc-users%NetBSD.org@localhost
@@ -122,6 +123,26 @@
 SUBST_FILES.findlib=   Lib/distutils/unixccompiler.py
 SUBST_SED.findlib=     -e 's,/usr/local,${PREFIX},'
 
+# XXX: It might be needed to add manually more paths like ${PREFIX}/qt5/lib
+# Testing:
+# >>> from ctypes.util import find_library
+# >>> find_library("m")
+# 'libm.so.0'
+# >>> find_library("crypto")
+# 'libcrypto.so.11'
+# >>> find_library("GL")
+# 'libGL.so.2'
+# >>> find_library("curl")
+# 'libcurl.so.4'
+
+SUBST_CLASSES+=                pfindlib
+SUBST_MESSAGE.pfindlib=        Fixing find_library() on POSIX-like (excluding Darwin) systems.
+SUBST_STAGE.pfindlib=  pre-configure
+SUBST_FILES.pfindlib=  Lib/ctypes/util.py
+SUBST_SED.pfindlib=    -e 's!\(-Wl,-t -o\)!${COMPILER_RPATH_FLAG}${PREFIX}/lib -L${PREFIX}/lib \1!'
+
+.include "options.mk"
+
 SUBST_CLASSES+=                sslbase
 SUBST_MESSAGE.sslbase= Fixing OpenSSL base directory to find header file.
 SUBST_STAGE.sslbase=   pre-configure
diff -r 67db58577578 -r 78b515af48a6 lang/python34/options.mk
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lang/python34/options.mk  Sun Sep 18 12:36:41 2016 +0000
@@ -0,0 +1,28 @@
+# $NetBSD: options.mk,v 1.1 2016/09/18 12:36:41 kamil Exp $
+
+PKG_OPTIONS_VAR=       PKG_OPTIONS.python27
+PKG_SUPPORTED_OPTIONS+=        x11
+PKG_SUGGESTED_OPTIONS= x11
+
+.include "../../mk/bsd.prefs.mk"
+.include "../../mk/bsd.options.mk"
+
+.if !empty(PKG_OPTIONS:Mx11)
+# Support for native X11 paths as an option
+# This code is no-op for modular X11, however for simplicity don't make it conditional.
+SUBST_CLASSES+=                        x11findlib
+SUBST_MESSAGE.x11findlib=      Fixing find_library() for native X11.
+SUBST_STAGE.x11findlib=                pre-configure
+SUBST_FILES.x11findlib=                Lib/ctypes/util.py
+SUBST_SED.x11findlib=          -e 's!\(-Wl,-t -o\)!${COMPILER_RPATH_FLAG}${X11BASE}/lib -L${X11BASE}/lib \1!'
+
+# Required to get definition of X11BASE and retain X11 rpath paths for linker
+# We need to pass rpath to _ctypes.so to get functional dlopen(3) for X11 libs
+USE_X11=               yes
+
+SUBST_CLASSES+=                cdlopen
+SUBST_MESSAGE.cdlopen= Handle X11BASE paths in dlopen(3) calls of _ctypes.so
+SUBST_STAGE.cdlopen=   pre-configure
+SUBST_FILES.cdlopen=   setup.py
+SUBST_SED.cdlopen=     -e "s!\(libraries=\[\],\)!\1 runtime_library_dirs=\['${X11BASE}/lib'\],!"
+.endif