1.patch

diff --git a/drakefile b/drakefile
index 90429e6..37b9960 100644
--- a/drakefile
+++ b/drakefile
@@ -817,13 +817,14 @@ def configure(cxx_toolkit = None,
   ## Boost ##
   ## ----- ##
 
+  boost_static = cxx_toolkit.os in [drake.os.ios, drake.os.windows]
   boost_version = drake.Version(1, 60, 0)
   if boost is not None:
     boost = drake.cxx.boost.Boost(
       cxx_toolkit = cxx_toolkit,
       prefix = boost,
       version_effective = boost_version,
-      prefer_shared = cxx_toolkit.os not in [drake.os.windows, drake.os.ios],
+      prefer_shared = not boost_static,
     )
   else:
     boost_basename = 'boost_%s' % str(boost_version).replace('.', '_')
@@ -1043,6 +1044,8 @@ using python : %(python_version)s : %(python_prefix)s/%(python_bin)s : %(python_
           '--disable-icu',
           '--user-config=user-config.jam',
         ]
+        for opt in ['link', 'runtime-link']:
+          self.__command.append('{}={}'.format(opt, 'static' if boost_static else 'shared'))
         if windows:
           self.__command += [
             'target-os=windows',
@@ -1050,8 +1053,6 @@ using python : %(python_version)s : %(python_prefix)s/%(python_bin)s : %(python_
             'threadapi=win32',
             'abi=ms',
             'binary-format=pe',
-            'link=static',
-            'runtime-link=static',
             '--layout=tagged',
             '--prefix=%s' % boost_prefix_abs,
             '-sBUILD=<define>BOOST_USE_WINDOWS_H=1',
@@ -1071,8 +1072,6 @@ using python : %(python_version)s : %(python_prefix)s/%(python_bin)s : %(python_
             'cxxflags=-stdlib=libc++ -std=c++11',
             'linkflags=-stdlib=libc++ -std=c++11',
             'toolset=darwin',
-            'link=static',
-            'runtime-link=static',
             '--layout=tagged',
             '--prefix=%s' % boost_prefix_abs,
             'target-os=iphone',
@@ -1152,7 +1151,7 @@ using python : %(python_version)s : %(python_prefix)s/%(python_bin)s : %(python_
       cxx_toolkit = cxx_toolkit,
       prefix = boost_prefix,
       version_effective = boost_version,
-      prefer_shared = cxx_toolkit.os not in [drake.os.windows, drake.os.ios],
+      prefer_shared = not boost_static,
     )
     boost_rule = drake.Rule('boost')
     boost_rule << boost_headers_
@@ -1533,7 +1532,7 @@ using python : %(python_version)s : %(python_prefix)s/%(python_bin)s : %(python_
   example_config = drake.cxx.Config(cxx_config)
   example_config += das.config + elle.config + reactor.config + \
                     cryptography.config
-  if cxx_toolkit.os in [drake.os.windows, drake.os.ios, drake.os.android]:
+  if not boost.prefer_shared:
     example_config += boost.config_system(static = True)
   else:
     example_config.library_add(boost.system_dynamic)
diff --git a/src/elle/athena/drakefile b/src/elle/athena/drakefile
index 4a846c0..855811e 100644
--- a/src/elle/athena/drakefile
+++ b/src/elle/athena/drakefile
@@ -41,8 +41,7 @@ def configure(cxx_toolkit,
   ## Library ##
   ## ------- ##
 
-
-  if cxx_toolkit.os in [drake.os.windows, drake.os.ios, drake.os.android]:
+  if not boost.prefer_shared:
     local_config += boost.config_system(static = True)
   else:
     local_config += boost.config_system(link = False)
diff --git a/src/elle/cryptography/drakefile b/src/elle/cryptography/drakefile
index 24e31da..941610c 100644
--- a/src/elle/cryptography/drakefile
+++ b/src/elle/cryptography/drakefile
@@ -69,7 +69,7 @@ def configure(openssl_config,
       dopenssl_library = dopenssl_lib_dynamic
 
   boost = boost or drake.cxx.boost.Boost()
-  if cxx_toolkit.os in [drake.os.windows, drake.os.ios, drake.os.android]:
+  if not boost.prefer_shared:
     if python is not None and build_python_module:
       boost_python = boost.config_python(link = False, static = True)
       boost_python.library_add(drake.copy(boost.python_static, lib_path, strip_prefix = True))
@@ -114,7 +114,7 @@ def configure(openssl_config,
   cxx_config = drake.cxx.Config(cxx_config)
   cxx_config += config
   cxx_config += boost.config()
-  if cxx_toolkit.os in [drake.os.ios, drake.os.windows, drake.os.android]:
+  if not boost.prefer_shared:
     cxx_config += boost.config_system(link = False, static = True)
   else:
     cxx_config.library_add(
diff --git a/src/elle/das/drakefile b/src/elle/das/drakefile
index 836ec58..08e83cd 100644
--- a/src/elle/das/drakefile
+++ b/src/elle/das/drakefile
@@ -119,7 +119,7 @@ def configure(cxx_toolkit,
   config_examples = drake.cxx.Config(local_config)
   example_libs = [elle.library]
   for example in examples:
-    if cxx_toolkit.os in [drake.os.windows, drake.os.ios, drake.os.android]:
+    if not boost.prefer_shared:
       config_examples += boost.config_date_time(static = True)
     else:
       example_libs += [boost.date_time_dynamic]
diff --git a/src/elle/drakefile b/src/elle/drakefile
index 2c12caf..2254bf6 100644
--- a/src/elle/drakefile
+++ b/src/elle/drakefile
@@ -61,7 +61,7 @@ def configure(zlib_lib,
   # Boost
   boost = boost or drake.cxx.boost.Boost()
   cxx_config += boost.config()
-  if cxx_toolkit.os in [drake.os.macos, drake.os.windows, drake.os.ios, drake.os.android]:
+  if cxx_toolkit.os in [drake.os.macos] or not boost.prefer_shared:
     cxx_config += boost.config_filesystem(link = False, static = True)
     cxx_config.library_add(
       drake.copy(boost.filesystem_static, lib_path, strip_prefix = True))
@@ -69,7 +69,7 @@ def configure(zlib_lib,
     cxx_config += boost.config_filesystem(link = False)
     cxx_config.library_add(drake.copy(boost.filesystem_dynamic,
                                       lib_path, strip_prefix = True))
-  if cxx_toolkit.os in [drake.os.windows, drake.os.ios, drake.os.android]:
+  if not boost.prefer_shared:
     cxx_config += boost.config_system(link = False, static = True)
     cxx_config.library_add(
       drake.copy(boost.system_static, lib_path, strip_prefix = True))
@@ -88,7 +88,7 @@ def configure(zlib_lib,
       cxx_config.library_add(
         drake.copy(boost.python_static, lib_path, strip_prefix = True))
   else:
-    if python3 is not None:
+    if python3 is not None and cxx_toolkit.os is not drake.os.windows:
       boost_python = drake.cxx.Config(
         boost.config_system(link = False))
       boost_python.library_add(
@@ -666,7 +666,7 @@ def configure(zlib_lib,
   ]
   cxx_config_examples = drake.cxx.Config(cxx_config)
   cxx_config_examples.enable_debug_symbols()
-  if cxx_toolkit.os in [drake.os.windows, drake.os.ios, drake.os.android]:
+  if not boost.prefer_shared:
     cxx_config_examples += boost.config_date_time(static = True)
   else:
     cxx_config_examples.library_add(
diff --git a/src/elle/reactor/drakefile b/src/elle/reactor/drakefile
index 418955d..6b33797 100644
--- a/src/elle/reactor/drakefile
+++ b/src/elle/reactor/drakefile
@@ -259,7 +259,7 @@ def configure(curl_config,
   # Boost
   boost = boost or drake.cxx.boost.Boost()
   local_cxx_config += boost.config()
-  if cxx_toolkit.os in [drake.os.windows, drake.os.ios, drake.os.android]:
+  if not boost.prefer_shared:
     def import_lib(l):
       local_cxx_config.library_add(
         drake.copy(l, lib_path,
diff --git a/src/elle/service/aws/drakefile b/src/elle/service/aws/drakefile
index ca2d257..e131717 100644
--- a/src/elle/service/aws/drakefile
+++ b/src/elle/service/aws/drakefile
@@ -53,7 +53,7 @@ def configure(cryptography,
   local_cxx_config.enable_debug_symbols()
   local_cxx_config += config
 
-  if cxx_toolkit.os in [drake.os.windows, drake.os.ios, drake.os.android]:
+  if not boost.prefer_shared:
     local_cxx_config += boost.config_date_time(static = True)
   else:
     local_cxx_config += boost.config_date_time(link = False)