From c82efeabd2f9b89ff2ecd5261eceeeb3af022ae8 Mon Sep 17 00:00:00 2001
From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Date: Wed, 23 Dec 2015 11:51:31 +0100
Subject: [PATCH] Add an option to disable decimal

This patch replaces the existing --with-system-libmpdec option with a
--with-libmpdec={system,builtin,none} option, which allows to tell
Python whether we want to use the system libmpdec (already installed),
the libmpdec builtin the Python sources, or no libmpdec at all.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
[aduskett@gmail.com: Update for python 3.7.0]
Signed-off-by: Adam Duskett <aduskett@gmail.com>
---
 configure.ac | 17 ++++++++++++-----
 setup.py     |  2 +-
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/configure.ac b/configure.ac
index 8c9706582e..e6255babb6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3012,13 +3012,20 @@ fi
 AC_SUBST(LIBFFI_INCLUDEDIR)
 
 # Check for use of the system libmpdec library
-AC_MSG_CHECKING(for --with-system-libmpdec)
-AC_ARG_WITH(system_libmpdec,
-            AS_HELP_STRING([--with-system-libmpdec], [build _decimal module using an installed libmpdec library]),
+AC_MSG_CHECKING(for --with-libmpdec)
+AC_ARG_WITH(libmpdec,
+            AS_HELP_STRING([--with-libmpdec], [select which libmpdec version to use: system, builtin, none]),
             [],
-            [with_system_libmpdec="no"])
+            [with_libmpdec="builtin"])
 
-AC_MSG_RESULT($with_system_libmpdec)
+AC_MSG_RESULT($with_libmpdec)
+if test "$with_libmpdec" != "none"; then
+   MPDEC=yes
+else
+   DISABLED_EXTENSIONS="${DISABLED_EXTENSIONS} _decimal"
+   MPDEC=no
+fi
+AC_SUBST(MPDEC)
 
 # Check whether _decimal should use a coroutine-local or thread-local context
 AC_MSG_CHECKING(for --with-decimal-contextvar)
diff --git a/setup.py b/setup.py
index 9f09b3d985..a7f2e23d87 100644
--- a/setup.py
+++ b/setup.py
@@ -2076,7 +2076,7 @@ class PyBuildExt(build_ext):
         # Stefan Krah's _decimal module
         extra_compile_args = []
         undef_macros = []
-        if '--with-system-libmpdec' in sysconfig.get_config_var("CONFIG_ARGS"):
+        if '--with-libmpdec=system' in sysconfig.get_config_var("CONFIG_ARGS"):
             include_dirs = []
             libraries = [':libmpdec.so.2']
             sources = ['_decimal/_decimal.c']
-- 
2.20.1