python: Correctly detect ncurses opaque api

2 files changed, 118 insertions, 0 deletions

diff --git a/pkgs/development/interpreters/python/2.7/default.nix b/pkgs/development/interpreters/python/2.7/default.nix
index 4ad4679bd6ea..813c10897e73 100644
--- a/pkgs/development/interpreters/python/2.7/default.nix
+++ b/pkgs/development/interpreters/python/2.7/default.nix
@@ -40,6 +40,8 @@ let
       # patch python to put zero timestamp into pyc
       # if DETERMINISTIC_BUILD env var is set
       ./deterministic-build.patch
+
+      ./properly-detect-curses.patch
     ] ++ optionals stdenv.isCygwin [
       ./2.5.2-ctypes-util-find_library.patch
       ./2.5.2-tkinter-x11.patch
diff --git a/pkgs/development/interpreters/python/2.7/properly-detect-curses.patch b/pkgs/development/interpreters/python/2.7/properly-detect-curses.patch
new file mode 100644
index 000000000000..e2640bab0e9a
--- /dev/null
+++ b/pkgs/development/interpreters/python/2.7/properly-detect-curses.patch
@@ -0,0 +1,116 @@
+From 6dc83db69b5e29d25ba6d73646ea2e9a1097848a Mon Sep 17 00:00:00 2001
+From: Roumen Petrov <local@example.net>
+Date: Sun, 19 Feb 2012 16:13:24 +0200
+Subject: [PATCH] CROSS-properly detect WINDOW _flags for different ncurses versions
+
+---
+ Include/py_curses.h |    5 +++++
+ configure.ac        |   40 ++++++++++++++++++++++++++++++++++++++--
+ pyconfig.h.in       |    6 ++++++
+ 3 files changed, 49 insertions(+), 2 deletions(-)
+
+diff --git a/Include/py_curses.h b/Include/py_curses.h
+index f2c08f6..a9b5260 100644
+--- a/Include/py_curses.h
++++ b/Include/py_curses.h
+@@ -14,7 +14,9 @@
+ /* the following define is necessary for OS X 10.6; without it, the
+    Apple-supplied ncurses.h sets NCURSES_OPAQUE to 1, and then Python
+    can't get at the WINDOW flags field. */
++/* NOTE configure check if ncurses require such definition
+ #define NCURSES_OPAQUE 0
++*/
+ #endif /* __APPLE__ */
+ 
+ #ifdef __FreeBSD__
+@@ -57,9 +59,12 @@
+ #ifdef HAVE_NCURSES_H
+ /* configure was checking <curses.h>, but we will
+    use <ncurses.h>, which has all these features. */
++/* NOTE configure check for existence of flags
++ * Also flags are visible only if WINDOW structure is not opaque
+ #ifndef WINDOW_HAS_FLAGS
+ #define WINDOW_HAS_FLAGS 1
+ #endif
++*/
+ #ifndef MVWDELCH_IS_EXPRESSION
+ #define MVWDELCH_IS_EXPRESSION 1
+ #endif
+diff --git a/configure.ac b/configure.ac
+index 0a3a186..75f5142 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -4150,15 +4150,51 @@ then
+ fi
+ 
+ AC_MSG_CHECKING(whether WINDOW has _flags)
+-AC_CACHE_VAL(ac_cv_window_has_flags,
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <curses.h>]], [[
+   WINDOW *w;
+   w->_flags = 0;
+ ]])],
+ [ac_cv_window_has_flags=yes],
+-[ac_cv_window_has_flags=no]))
++[ac_cv_window_has_flags=no])
+ AC_MSG_RESULT($ac_cv_window_has_flags)
+ 
++py_curses_window_is_opaque=no
++if test no = $ac_cv_window_has_flags; then
++  AC_MSG_CHECKING([whether WINDOW has _flags in non-opaque structure])
++  AC_COMPILE_IFELSE([
++  AC_LANG_PROGRAM([[
++    #define NCURSES_OPAQUE 0
++    #include <curses.h>
++  ]],[[
++    WINDOW *w;
++    w->_flags = 0;
++  ]])],
++  [py_curses_window_is_opaque=yes])
++  AC_MSG_RESULT([$py_curses_window_is_opaque])
++fi
++if test yes = $py_curses_window_is_opaque; then
++  ac_cv_window_has_flags=yes
++  AC_DEFINE([NCURSES_OPAQUE], [0], [Define to 0 if you have WINDOW _flags in non-opaque structure.])
++fi
++
++py_curses_window_is_internal=no
++if test no = $ac_cv_window_has_flags; then
++  AC_MSG_CHECKING([whether WINDOW has _flags as internal structure])
++  AC_COMPILE_IFELSE([
++  AC_LANG_PROGRAM([[
++    #define NCURSES_INTERNALS 1
++    #include <curses.h>
++  ]],[[
++    WINDOW *w;
++    w->_flags = 0;
++  ]])],
++  [py_curses_window_is_internal=yes])
++  AC_MSG_RESULT([$py_curses_window_is_internal])
++fi
++if test yes = $py_curses_window_is_internal; then
++  ac_cv_window_has_flags=yes
++  AC_DEFINE([NCURSES_INTERNALS], [1], [Define to 1 if you have WINDOW _flags as internal structure.])
++fi
+ 
+ if test "$ac_cv_window_has_flags" = yes
+ then
+diff --git a/pyconfig.h.in b/pyconfig.h.in
+index 3ca3a4f..484c817 100644
+--- a/pyconfig.h.in
++++ b/pyconfig.h.in
+@@ -1130,6 +1130,12 @@
+ /* Define if mvwdelch in curses.h is an expression. */
+ #undef MVWDELCH_IS_EXPRESSION
+ 
++/* Define to 1 if you have WINDOW _flags as internal structure. */
++#undef NCURSES_INTERNALS
++
++/* Define to 0 if you have WINDOW _flags in non-opaque structure. */
++#undef NCURSES_OPAQUE
++
+ /* Define to the address where bug reports for this package should be sent. */
+ #undef PACKAGE_BUGREPORT
+ 
+-- 
+1.6.4
+