[CMake] Cannot get a 64-bit build of MySQL on a 64-bit Windows machine

[A.M. Sabuncu]

Petr,

Thank you so much.  The following command you suggested fixed the problem,
and I was able to run a successful build:

cmake .. -G "Visual Studio 15 2017 Win64"

I am grateful for your help.  This may have been a minor item for you, but
for me, it was a real stumbling block.

By the way, the other alternative you suggested did not work:

cmake .. -A Win64   (or "Win64")

The result was:

-- Building for: Visual Studio 15 2017
-- Running cmake version 3.8.2
-- Found Git: C:/Program Files/Git/cmd/git.exe (found version
"2.10.2.windows.1")
-- Configuring with MAX_INDEXES = 64U
-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:126 (PROJECT):
  No CMAKE_C_COMPILER could be found.

The funny thing is that the use of the -G flag does not issue a "Building
for..." message, but correctly locates the necessary compiler, whereas the
-A flag seems to know what target it is building for, but cannot find the
compiler!

Thank you again,

A. M. Sabuncu

On Tue, Jul 11, 2017 at 10:12 AM, Petr Kmoch <petr.kmoch at gmail.com> wrote:

> Hi,
>
> when generating a Visual Studio buildsystem with CMake, you can specify
> the target architecture. If you don't, the default is 32-bit.
>
> To specify the architecture, either put it into the generator name:
>
>   cmake .. -G "Visual Studio 15 2017 Win64" ....
>
> or specify just the architecture using -A:
>
>   cmake .. -A Win64 ....
>
> See description of -G and -A in CMake docs: https://cmake.org/cmake/help/
> latest/manual/cmake.1.html
>
> Petr
>
> On 10 July 2017 at 22:06, A.M. Sabuncu <amsabuncu at gmail.com> wrote:
>
>> I am completely new to CMake, and am using to build MySQL 5.7.18 on
>> Windows 10 x64, using the following command:
>>
>> cmake .. -DDOWNLOAD_BOOST=1 -DWITH_BOOST="C:\Boost" -DENABLE_DOWNLOADS=1
>>
>> I have VS 2017 installed, and I am on 64 bit machine, but for some
>> reason, the above command produces the following output:
>>
>> The CXX compiler identification is MSVC 19.10.25019.0
>> -- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual
>> Studio/2017/Professional/VC/Tools/MSVC/14.10.25017/bin/HostX86/x86/cl.exe
>> -- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual
>> Studio/2017/Professional/VC/Tools/MSVC/14.10.25017/bin/HostX86/x86/cl.exe
>> -- works
>>
>> The correct compiler is in the HostX64/x64 folder.
>>
>> Thinking that CMake might be looking it up from there, I checked the
>> processor architecture environment variable from the same cmd.exe that I
>> launched the CMake command from, and here's the result:
>>
>> PROCESSOR_ARCHITECTURE=AMD64
>>
>> When I follow the above CMake command with the following:
>>
>> devenv MySQL.sln /build RelWithDebInfo
>>
>> I get 32-bit results generated, which is not what I want.
>>
>> How can I get CMake to generate a 64-bit build?
>>
>> Thanks so much.
>>
>>
>> --
>>
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