[Boost-bugs] [Boost C++ Libraries] #8719: Not possible to target older iOS major version when using SDK from later version

Subject: [Boost-bugs] [Boost C++ Libraries] #8719: Not possible to target older iOS major version when using SDK from later version
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-06-21 10:50:26

#8719: Not possible to target older iOS major version when using SDK from later
version
-------------------------------------------+-------------------------------
 Reporter:  William Gallafent <william@…>  |       Type:  Bugs
   Status:  new                            |  Milestone:  To Be Determined
Component:  Building Boost                 |    Version:  Boost Development
 Severity:  Problem                        |  Trunk
                                           |   Keywords:
-------------------------------------------+-------------------------------
 Current example: I want to build using iOS SDK version 6.1, but with the
 minimum target OS version set to 5.1.

 In order to achieve this I set macosx-version-min=5.1, macosx-version=6.1.

 The code in darwin.jam, however, does not see 5.1 as a valid minimum
 version when the SDK version is 6.1. The code below appears to permit only
 6.0 and 6.1.

 {{{
         if $(version[3]) > 0
         {
             # We have a minor version of an SDK. We want to set up
             # previous minor versions, plus the current minor version.
             # So we recurse to set up the previous minor versions, up to
             # the current version.
             local minor-minus-1 = [ CALC $(version[3]) - 1 ] ;
             return
                 [ init-sdk $(condition) : $(root)
                     : $(version[1-2]) $(minor-minus-1) : [ version-to-
 feature $(version[1-2]) $(minor-minus-1) ] ]
                 $(version-feature) ;
         }
 }}}

 The resulting error when attempting to target 5.1 while using the 6.1 SDK
 is:

 {{{
 /Users/williamg/Projects/Experimenta/universe/boost/boost_1_53_0/tools/build/v2/build/feature.jam:485:
 in validate-value-string from module feature
 error: "iphone-5.1" is not a known value of feature <macosx-version-min>
 error: legal values: "iphone-6.1" "iphone-6.0" "iphonesim-6.1"
 "iphonesim-6.0" "10.7" "10.6" "10.5" "10.4" "10.3" "10.2" "10.1" "10.0"
 "10.8"
 }}}

 This needs to change so that it's possible to target versions of the OS
 older than the same major release.

 Discovered in Boost 1.53, but still present on trunk at time of writing.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8719>
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