[CMake] CMake's FindBoost Module Can't Detect Boost Version

2019-12-17 Thread Osman Zakir
I built Boost 1.72.0 while passing the "--layout=versioned" flag to b2, but 
when I tried to rebuild Jinja2Cpp with the newer version of Boost using CMake, 
it failed to generate project files and said it couldn't filesystem and system 
and also couldn't detect version information.  Could someone please help me out 
with this?  Thanks.
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Re: [CMake] CMake's FindBoost Module Can't Detect Boost Version

2019-12-17 Thread Mateusz Loskot
On Tue, 17 Dec 2019 at 16:39, Osman Zakir  wrote:
>
> I built Boost 1.72.0 while passing the "--layout=versioned" flag to b2, but 
> when I tried to rebuild Jinja2Cpp with the newer version of Boost using 
> CMake, it failed to generate project files and said it couldn't filesystem 
> and system and also couldn't detect version information.  Could someone 
> please help me out with this?

I recall you have been asking similar questions in the past about Jinja2Cpp.

You have received number of useful suggestions [1], e.g. to use
-DBoost_DEBUG=ON,
and investigate detailed diagnostics, to try -DBoost_COMPILER=...
and -DBoost_ARCHITECTURE hints, etc.
Please, apply this knowledge.

Finally, your questions are poorly formulated e.g. my crystal sphere has broken
and I can't figure out what compiler, toolset, cmake version, etc. you are on.
Next time, try to help people help you [2]

[1] https://cmake.org/pipermail/cmake/2018-October/068477.html
[2] http://www.catb.org/~esr/faqs/smart-questions.html

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net
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Re: [CMake] CMake's FindBoost Module Can't Detect Boost Version

2019-12-17 Thread Mateusz Loskot
On Tue, 17 Dec 2019 at 18:43, Osman Zakir  wrote:
>
> I tried passing -DBoost_COMPILER and -DBoost_DEBUG

That is incorrect!

The options must read  -DBoost_DEBUG=ON
and -DBoost_COMPILER=-vc141 or vc142, depending on
what b2.exe generated in names for your MSVC version.

> but it seems it's only looking for up to Boost 1.71.0; the test versions go 
> up to there only.
> Should I edit the FindBoost.cmake file to have it look for version 1.72.0 as 
> well?

If you have read/searched the FindBoost docs page
https://cmake.org/cmake/help/latest/module/FindBoost.html?highlight=version
you would have learned that you can specify
-DBoost_ADDITIONAL_VERSIONS=1.72

> I don't know about all of the flags I need to pass, but if it can find the 
> Boost version then it should be able to detect all of the stuff on its own, 
> right?

It should, but it still may need hints like Boost_COMPILER, or
Boost_ARCHITECTURE.

FindBoost is a Find-module.
A Find-module is a ***guesser***.
A guesser has right to fail to guess...no hard promises.

https://cmake.org/cmake/help/latest/manual/cmake-packages.7.html

"Unlike a package configuration file, it is not shipped with upstream,
but is used by downstream to find the files by guessing locations of
files with platform-specific hints."

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net
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Re: [CMake] CMake's FindBoost Module Can't Detect Boost Version

2019-12-17 Thread Osman Zakir
I tried passing -DBoost_COMPILER and -DBoost_DEBUG but it seems it's only 
looking for up to Boost 1.71.0; the test versions go up to there only.  Should 
I edit the FindBoost.cmake file to have it look for version 1.72.0 as well?

I'm using MSVC version 14.2, Visual Studio 2019.  I'm using the Developer 
Command Prompt for VS2019.

I don't know about all of the flags I need to pass, but if it can find the 
Boost version then it should be able to detect all of the stuff on its own, 
right?  The first step there isn't going right.
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Re: [CMake] CMake's FindBoost Module Can't Detect Boost Version

2019-12-17 Thread Osman Zakir
Yeah, forgot.

I did specify the values for the flags on the actual thing.  
-DBoost_COMPILER=-vc142, -DBoost_ARCHITECTURE=-x64 and -DBoost_DEBUG=ON.  I'll 
try specifying the version number like what you said.  Thanks for that.
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