Re: [boost] Did Boost 1.59.0 change the meaning of "using python : 3.4 : ..." in user-config.jam?

Subject: Re: [boost] Did Boost 1.59.0 change the meaning of "using python : 3.4 : ..." in user-config.jam?
From: Jonathan Wakely (jwakely.boost_at_[hidden])
Date: 2015-08-24 11:57:03

On 24 August 2015 at 10:15, Vladimir Prus wrote:
> Maybe "using python : 2.7" was previously added by bootstrap.sh. If you
> still have
> 1.58 conveniently available, could you run bootstrap.sh and compare the
> generated
> project-config.jam with the one in 1.59?

Aha, good thinking:

--- boost_1_58_0/project-config.jam     2015-08-24 16:54:41.177750798 +0100
+++ boost_1_59_0/project-config.jam     2015-08-24 16:55:03.936748390 +0100
@@ -15,7 +15,11 @@
project : default-build <toolset>gcc ;

# Python configuration
-using python : 2.7 : /usr ;
+import python ;
+if ! [ python.configured ]
+{
+    using python : 2.7 : /usr ;
+}

path-constant ICU_PATH : /usr ;

So with 1.59.0 the python-2.7 config is only added if
python.configured is true, but it used to be there unconditionally.