[CMake] CMake 3.7.1 gui fails to launch

[daryl at daryllee.com]

As it turns out, no, I can't use Qt5.  In fact, I'd love to hear from  
anyone who actually has.  I find this in Modules/FindQt.make:

===========================
if (Qt_FIND_VERSION)
   if (Qt_FIND_VERSION MATCHES "^([34])(\\.[0-9]+.*)?$")
     set(DESIRED_QT_VERSION ${CMAKE_MATCH_1})
   else ()
     message(FATAL_ERROR "FindQt was called with invalid version  
'${Qt_FIND_VERSION}'. Only Qt major versions 3 or 4 are supported. If  
you do not need to support both Qt3 and Qt4 in your source consider  
calling find_package(Qt3) or find_package(Qt4) instead of  
find_package(Qt) instead.")
   endif ()
endif ()
===========================

So I re-installed Qt4, rebuilt CMake (./bootstrap --qt-gui, make, sudo  
make install) and still got the same runtime failure.

Quoting David Cole <DLRdave at aol.com>:

> Can you use Qt5? CMake 3.7 is typically built using Qt5: perhaps a Qt5
> **requirement** has crept in since it's the commonly used one now.
>
>
> HTH,
> David C.
>
>
>
> On Fri, Jan 6, 2017 at 10:41 AM,  <daryl at daryllee.com> wrote:
>> I'm running Ubuntu 14.04 and I'm trying to get the current version of CMake
>> to run.  (The apt-get version is 2.8).
>>
>> I installed Qt4 (version 4.8.6) with
>>
>>   $ sudo apt-get install libqt4-core libqt4-dev libqt4-gui qt4-dev-tools
>>
>> I installed cmake
>>
>>   $ ./bootstrap & make & sudo make install
>>
>> all seemed to run without issue.  Running "cmake-gui --version" reported
>> version 3.7.1, but running "cmake-gui" failed:
>>
>> =========
>> daryl at eve-ldb:~/cmake/cmake-3.7.1$ cmake-gui --version
>> cmake version 3.7.1
>>
>> CMake suite maintained and supported by Kitware (kitware.com/cmake).
>> daryl at eve-ldb:~/cmake/cmake-3.7.1$ cmake-gui
>> cmake-gui: symbol lookup error: cmake-gui: undefined symbol:
>> _ZN9QListData11detach_growEPii
>> ==========
>>
>> That looks like a Qt linkage error.  Any suggestions on resolving this?
>> --
>>
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