Trac #20002: Move interrupt.pyx to package cysignals

Move Sage’s interrupt handling to a separate package:
https://github.com/sagemath/cysignals

See also https://groups.google.com/d/topic/sage-
devel/oA9NsF26eOA/discussion for a discussion. We need one trivial
Cython patch, see [cython/cython#483]

'''Tarball''': https://github.com/sagemath/cysignals/releases/download/1
.0rc2/cysignals-1.0rc2.tar.bz2

URL: http://trac.sagemath.org/20002
Reported by: malb
Ticket author(s): Jeroen Demeyer
Reviewer(s): Martin Albrecht

build/make/deps

@@ -105,6 +105,7 @@ sagelib: \
 		$(INST)/$(BRIAL) \
 		$(INST)/$(CEPHES) \
 		$(INST)/$(CLIQUER) \
+		$(INST)/$(CYSIGNALS) \
 		$(INST)/$(CYTHON) \
 		$(INST)/$(ECL) \
 		$(INST)/$(ECLIB) \

build/pkgs/cysignals/SPKG.txt

@@ -0,0 +1,19 @@
+= cysignals =
+
+== Description ==
+
+Interrupt and signal handling for Cython
+
+== License ==
+
+LGPL version 3 or later
+
+== Upstream Contact ==
+
+https://github.com/sagemath/cysignals
+
+== Dependencies ==
+
+* Python
+* Cython
+* PARI (optional)

build/pkgs/cysignals/checksums.ini

@@ -0,0 +1,4 @@
+tarball=cysignals-VERSION.tar.bz2
+sha1=390f62a454a96cccf85ee3f2c62dd7d4622ec36b
+md5=140fa256493a6a6ec11f57c2d95e3894
+cksum=268906678

build/pkgs/cysignals/dependencies

@@ -0,0 +1,5 @@
+$(INST)/$(CYTHON) $(INST)/$(PARI)
+
+----------
+All lines of this file are ignored except the first.
+It is copied by SAGE_ROOT/build/make/install into SAGE_ROOT/build/make/Makefile.

build/pkgs/cysignals/package-version.txt

@@ -0,0 +1 @@
+1.0rc2

build/pkgs/cysignals/spkg-check

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+if [ -z "$SAGE_LOCAL" ]; then
+    echo >&2 "SAGE_LOCAL undefined ... exiting"
+    echo >&2 "Maybe run 'sage --sh'?"
+    exit 1
+fi
+
+cd src && $MAKE check

build/pkgs/cysignals/spkg-install

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+if [ -z "$SAGE_LOCAL" ]; then
+    echo >&2 "SAGE_LOCAL undefined ... exiting"
+    echo >&2 "Maybe run 'sage --sh'?"
+    exit 1
+fi
+
+cd src
+
+for patch in ../patches/*.patch; do
+    [ -r "$patch" ] || continue  # Skip non-existing or non-readable patches
+    patch -p1 <"$patch"
+    if [ $? -ne 0 ]; then
+        echo >&2 "Error applying '$patch'"
+        exit 1
+    fi
+done
+
+./configure
+if [ $? -ne 0 ]; then
+    echo "Error configuring cysignals ... exiting"
+    exit 1
+fi
+
+$MAKE install
+if [ $? -ne 0 ]; then
+    echo "Error installing cysignals ... exiting"
+    exit 1
+fi

build/pkgs/cysignals/type

@@ -0,0 +1 @@
+standard

build/pkgs/cython/package-version.txt

@@ -1 +1 @@
-0.23.4
+0.23.4.p0

build/pkgs/cython/patches/pxi_sys_path.patch

@@ -0,0 +1,21 @@
+See https://github.com/cython/cython/pull/483
+
+commit 97de55acf4efe3c3ae2b5a955578cae71958dfe7
+Author: Jeroen Demeyer <[email protected]>
+Date:   Sun Feb 7 17:07:54 2016 +0100
+
+    Check sys.path for .pxi files too
+
+diff --git a/Cython/Compiler/Main.py b/Cython/Compiler/Main.py
+index 65b3cd3..d4d0f78 100644
+--- a/Cython/Compiler/Main.py
++++ b/Cython/Compiler/Main.py
+@@ -269,7 +269,7 @@ class Context(object):
+         # Search list of include directories for filename.
+         # Reports an error and returns None if not found.
+         path = self.search_include_directories(filename, "", pos,
+-                                               include=True)
++                                               include=True, sys_path=True)
+         if not path:
+             error(pos, "'%s' not found" % filename)
+         return path