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bug#16569: [PATCH] gnu: Enable the 'ctypes' module in Python.

From: Cyril Roelandt
Subject: bug#16569: [PATCH] gnu: Enable the 'ctypes' module in Python.
Date: Sat, 1 Feb 2014 01:46:00 +0100

* gnu/packages/python.scm (python-2): add libffi to the inputs and use it to
  build the ctypes module.
 gnu/packages/python.scm | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index 6d2c940..260bace 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -27,9 +27,11 @@
   #:use-module (gnu packages compression)
   #:use-module (gnu packages gdbm)
   #:use-module (gnu packages icu4c)
+  #:use-module (gnu packages libffi)
   #:use-module (gnu packages readline)
   #:use-module (gnu packages openssl)
   #:use-module (gnu packages patchelf)
+  #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages sqlite)
   #:use-module (guix packages)
   #:use-module (guix download)
@@ -98,10 +100,12 @@
         (let ((bz2 (assoc-ref %build-inputs "bzip2"))
               (gdbm (assoc-ref %build-inputs "gdbm"))
+              (libffi (assoc-ref %build-inputs "libffi"))
               (openssl (assoc-ref %build-inputs "openssl"))
               (readline (assoc-ref %build-inputs "readline"))
               (zlib (assoc-ref %build-inputs "zlib")))
          (list "--enable-shared"                  ; allow embedding
+               "--with-system-ffi"                ; build ctypes
                (string-append "CPPFLAGS="
                 "-I" bz2 "/include "
                 "-I" gdbm "/include "
@@ -111,6 +115,7 @@
                (string-append "LDFLAGS="
                 "-L" bz2 "/lib "
                 "-L" gdbm "/lib "
+                "-L" libffi "/lib "
                 "-L" openssl "/lib "
                 "-L" readline "/lib "
                 "-L" zlib "/lib")))
@@ -137,7 +142,9 @@
      `(("bzip2" ,bzip2)
        ("gdbm" ,gdbm)
+       ("libffi" ,libffi)                         ; for ctypes
        ("openssl" ,openssl)
+       ("pkg-config" ,pkg-config)
        ("readline" ,readline)
        ("zlib" ,zlib)
        ("patchelf" ,patchelf)))                   ; for (guix build rpath)

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