[Development] OS X SDK set via configure is not used during build (dev branch)

[Mikkel Krautz]

On Wed, Jan 13, 2016 at 12:55 AM, Thiago Macieira
<thiago.macieira at intel.com> wrote:
> On Wednesday 13 January 2016 00:36:14 Mikkel Krautz wrote:
>> Hi,
>>
>> I'm currently on 10.10, Yosemite, using Xcode 7.1.1 (as of this writing).
>>
>> This version of Xcode only ships with the 10.11 SDK. But I am on 10.10.
>>
>> When I built Qt (dev branch), by passing -sdk macosx10.11 -- the only
>> SDK I have -- to configure, I get build failures.
>>
>> Inspecting the compiler flags, I see that the OS X 10.10 SDK is being
>> used (-isysroot, etc.).
>
> Remove all .qmake.{cache,super} files you may have. The build stores the
> version of the SDK it found when you first ran qmake and won't check again.
> This wasn't a problem in the past because Apple used to provide the same SDK
> for more than one version of Xcode, so you were unlikely to upgrade and lose
> the SDK you last had.

I am pretty sure I had the files cleaned before trying this, so I tried again:

$ cd qt5
$ git submodule foreach --recursive git clean -dfx -f
$ find . | grep qmake.cache
./qtbase/qmake/cachekeys.h
./qtbase/tests/auto/tools/qmake/testdata/export_across_file_boundaries/.qmake.cache
$ find . | grep qmake.super
$

Building:

$ cd qtbase
$ OPENSSL_LIBS="-L${MUMBLE_PREFIX}/lib -lssl -lcrypto" ./configure
-developer-build -opensource -nomake examples -sdk macosx10.11 -I
${MUMBLE_PREFIX}/include -openssl-linked
$ make

Full output at https://gist.github.com/mkrautz/2041003a8aeb63a792b8

Initially, I had MAKEFLAGS set to -j8.

When I did that, I observed that *some* clang++ invocations correctly
used the 10.11 SDK.

Here's me running "make -j8", right after I ran "make":

https://gist.github.com/mkrautz/d96d5329807addf8abc2

So, some things are using the correct sysroot.