[CMake] Beginning to compiling CMake file

[Volker Enderlein]

Hi,

the configuration step of OSL is running this command (via a powershell 
command), $... denotes always variables defined somewhere in the 
appveyor file, $env: denotes environment variables.

cmake ..\.. -G "$GENERATOR" 
-DCMAKE_CONFIGURATION_TYPES="$env:CONFIGURATION" 
-DCMAKE_PREFIX_PATH="$env:OPENIMAGEIOHOME;$DEP_DIR;$BOOST_ROOT;$LLVM_DIR" 
-DCMAKE_INSTALL_PREFIX="$DEP_DIR" -DLLVM_DIRECTORY="$LLVM_DIR" 
-DLLVM_STATIC=ON -DOPENIMAGEIOHOME="$env:OPENIMAGEIOHOME" 
-DBOOST_LIBRARYDIR="$BOOST_LIBRARYDIR" 
-DFLEX_EXECUTABLE="C:\ProgramData\chocolatey\lib\winflexbison\tools\win_flex.exe" 
-DBISON_EXECUTABLE="C:\ProgramData\chocolatey\lib\winflexbison\tools\win_bison.exe" 
-DUSE_QT=OFF -DBUILDSTATIC=OFF -DLINKSTATIC=OFF

The build step is run via this command:

cmake --build . --config $env:CONFIGURATION -- /nologo /verbosity:minimal

So it builds the entire OSL Project.

As the OSL Toy is included in the master it should be built too. 
(According to the documentation of the PR you linked to, you should 
remove "-DUSE_QT=OFF" from the CMake configuration call.) And because 
you are on Windows using a Visual Studio I suppose you can safely remove 
-DLLVM_DIRECTORY="$LLVM_DIR" -DLLVM_STATIC=ON (as you are not building 
with LLVM) and replace -G "$GENERATOR" by -G "Visual Studio 14 2015" or 
-G "Visual Studio 15 2017". "$env:Configuration" ca be replaced with 
"Release" (without the double quotes). Other environment variables and 
variables may need to be replaced by %variable% if you build on a non 
powershell command prompt. This is not tested, so you may need to adopt 
other settings too.

I am not aware of any way to build OSL Toy separately. Maybe you should 
drop Larry Gritz (the committer of the PR) a message asking for further 
guidance as this is not really a CMake issue rather than a "How do I 
compile only subproject Y of X" with CMake.

Cheers Volker

Am 03/08/2018 um 14:43 schrieb CrestChristopher:
> Hi, I assume that the first link I posted which was a link to OSL Toy 
> within the Open Shading Language repository uses the methods which you 
> mention to compile the file ?
>
>> i.e. the top level directory of the github project, you'll se an 
>> appveyor.yml file entry. That is the information for the continuous 
>> integration tool (CI, AppVeyor) they are using to build the project 
>> from scratch. If you look into it, you'll find a before_build and a 
>> build_script section. Both contain calls to CMake either to build the 
>> dependencies (before_build) or the project itself (build_script). 
>> This is a starting point for you how to formulate your CMake call. 
>
> With the information within the before_build & build_script section; 
> how do I formulate the CMake call, as to compile ?
>
> Thank You.
>
>
> On 8/3/2018 2:48 AM, Volker Enderlein wrote:
>> If you go to https://github.com/imageworks/OpenShadingLanguage
>>
>> i.e. the top level directory of the github project, you'll se an 
>> appveyor.yml file entry. That is the information for the continuous 
>> integration tool (CI, AppVeyor) they are using to build the project 
>> from scratch. If you look into it, you'll find a before_build and a 
>> build_script section. Both contain calls to CMake either to build the 
>> dependencies (before_build) or the project itself (build_script). 
>> This is a starting point for you how to formulate your CMake call.
>>
>> Cheers Volker
>>
>> Am 03/08/2018 um 02:40 schrieb CrestChristopher:
>>> Sorry, what is this information for; and how can it be used within 
>>> the `build_script` section in the appveyor.yml file ?
>>>
>>>
>>> On 8/2/2018 9:30 AM, Volker Enderlein wrote:
>>>> Please have a look into the appveyor.yml file under section 
>>>> build_script: you see the typical invocation of cmake for this 
>>>> github project.
>>>>
>>>> Cheers Volker
>>>>
>>>> Am 02/08/2018 um 15:18 schrieb CrestChristopher:
>>>>> I hope this helps; 
>>>>> https://github.com/imageworks/OpenShadingLanguage/pull/824 ?
>>>>>
>>>>>
>>>>> On 8/1/2018 5:20 PM, Volker Enderlein wrote:
>>>>>> Am 31.07.2018 um 06:17 schrieb CrestChristopher:
>>>>>>> Hi, I'm a beginner to CMake and for weeks I've been trying to 
>>>>>>> compile a CMake file which I found on a github repository.  All 
>>>>>>> I can say is I have a CMakeLists.txt file but I don't know how 
>>>>>>> to compile and I hope someone can help ?
>>>>>>>
>>>>>>> Christopher
>>>>>>>
>>>>>> You may want to include information about the name and the link 
>>>>>> to the project repository from Github to get the best possible 
>>>>>> responses. Without that it's just shooting in the dark.
>>>>>>
>>>>>> Cheers Volker
>>>>>>
>>>>>
>>>>
>>>
>>
>

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