Clang support

Discussion about CodeLite development process and patches
kira.backes
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Clang support

Post by kira.backes » Wed Nov 27, 2013 1:55 pm

Hello Eran (et al?),

I was trying to set up codelite for my project, which is only compileable with clang++, c++1y mode and libc++ of clang (since the gcc libstdc still doesn’t have regex). Now I tried to set this up and failed completely.

There is no support for CMake in codelite, expect this gcc output parser, but this one doesn’t work for clang. So it’s not possible for me to use the clang autocomplete functionality. So I’m sad ;-) QtCreator does not have clang autocomplete but it works with this setup flawlessly and parses c++1y well enough to be acceptable.

Now, since I already asked once about contribution and you basically said "fix bugs", how is the development planned. Do you want to stay on the internal project file based system? I really like that QtCreator just uses CMake to see which files are in the project and basically uses CMake as its project file. Also it works with clang.

So, I have some questions:

1) In the long-term, do you want codelite to stay on this "proprietary" format for project files?
2) If you want to keep the internal project file format, do you want to support CMake somewhen as a proper alternative?
3) Maybe this is a rhetorical question, but do you want to support project which (can) only use clang++ (and c++11 or c++1y) and fully support it with clang autocomplete and the project files?


rgds, Kira

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eranif
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Re: Clang support

Post by eranif » Wed Nov 27, 2013 2:14 pm

kira.backes wrote:So it’s not possible for me to use the clang autocomplete functionality
How is this related? codelite has a perfectly working clang code completion
http://codelite.org/LiteEditor/ClangIntegration41

kira.backes wrote:There is no support for CMake in codelite, expect this gcc output parser
I am not sure what you are trying to say here. Does this help you: http://codelite.org/LiteEditor/CustomMakefiles ( it has a working example of how to setup cmake with codelite )
kira.backes wrote:you basically said "fix bugs"
I said: go over the tracker, where you can find bugs and feature requests.
To get commit rights to our git (it DavidGH as well) you need to see some persistence ( i.e. submit patches of bugs / new features with good quality over time ). This is how the open source world works
kira.backes wrote:Do you want to stay on the internal project file based system?
I don't see this changing in the near future. You can write a plugin that supports cmake better than the current support
kira.backes wrote:Also it works with clang.
So does codelite
kira.backes wrote:1) In the long-term, do you want codelite to stay on this "proprietary" format for project files?
See above my answer
kira.backes wrote:2) If you want to keep the internal project file format, do you want to support CMake somewhen as a proper alternative?
Writing a CMake plugin should be an easy task - you wanted to help - here is your chance ;)
kira.backes wrote:3) Maybe this is a rhetorical question, but do you want to support project which (can) only use clang++ (and c++11 or c++1y) and fully support it with clang autocomplete and the project files?
I really don't understand this. To get clang code completion that project does not need to be compiled with clang. codelite can bring you both: compile with g++ and enjoy clang code completion ( codelite uses liblibclang.so for code completion )

Please read the link I pasted from the codelite's wiki

Eran
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kira.backes
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Re: Clang support

Post by kira.backes » Wed Nov 27, 2013 7:49 pm

Hello,


I think you misunderstood me. I can not compile my code with g++, I can only compile it with clang++.

Now, if you look at this link:
http://codelite.org/LiteEditor/ClangIntegration41#toc4

You can see, that I need to use codelitegcc so codelite knows how each file is compiled. But I can not use codelitegcc, since I can only compile this project with clang++. So I can’t use the clang code completion ;-)

For this to work we would probably need a "codeliteclang" which parses the clang calls...

And about the plugin, I’ll think about it.


rgds, Kira

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eranif
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Re: Clang support

Post by eranif » Wed Nov 27, 2013 9:07 pm

kira.backes wrote:But I can not use codelitegcc
Use the source luke! (i.e. read codelitegcc sources)

codelitegcc is a thin wrapper that passes the information to the actual compiler (the first argument)
It is used so codelite can "copy" the compilation line and place it in a text file which is later processed by codelite ( so you will get a functional working clang code completion )

So by typing:

codelitegcc clang++ -> you are actually invoking clang++

Eran
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kira.backes
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Re: Clang support

Post by kira.backes » Wed Nov 27, 2013 10:08 pm

eranif wrote:codelitegcc clang++ -> you are actually invoking clang++
Sure, I tried that already, didn’t work. So I thought this doesn’t work because it is incompatible with clang++ (because clang++ has different compiler flags than g++). But if you say this is actually supposed to work, then I’ll retry it ;-)


rgds, Kira

kira.backes
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Re: Clang support

Post by kira.backes » Thu Nov 28, 2013 12:23 pm

Hello,


you were right, codelitegcc seems to be able to parse clang++ flags as well as g++. The problem is std::optional (in libc++) as well as boost::optional, when the header file of one of them is included the clang auto-completion breaks. So it is actually a clang (3.3?) bug ;-)


rgds, Kira

kira.backes
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Re: Clang support

Post by kira.backes » Thu Nov 28, 2013 12:26 pm

eranif wrote:I said: go over the tracker, where you can find bugs and feature requests.
To get commit rights to our git (it DavidGH as well) you need to see some persistence ( i.e. submit patches of bugs / new features with good quality over time ). This is how the open source world works
Actually, I wasn’t talking about commit rights. Lot of projects have special pages dedicated for contribution and how-to-contribute documents, they have mailing lists and IRC channels and ways to participate in development discussion. So I was basically asking if such things are in place, because I think of those things as crucial for such a big project.

rgds, Kira

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eranif
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Re: Clang support

Post by eranif » Thu Nov 28, 2013 12:27 pm

kira.backes wrote:codelitegcc seems to be able to parse clang++ flags as well as g++
codelitegcc parses _nothing_
It simply passes what _you_ placed as the flags in the project settings

Does your project compile properly?
If it does, then I would expect that the code completion will work

Eran
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eranif
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Re: Clang support

Post by eranif » Thu Nov 28, 2013 12:31 pm

kira.backes wrote:they have mailing lists and IRC channels
#codelite at irc.freenode.org

The mailing list is less used, but it does exists: http://codelite.org -> Community

Eran
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kira.backes
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Re: Clang support

Post by kira.backes » Thu Nov 28, 2013 12:34 pm

eranif wrote:codelitegcc parses _nothing_
It simply passes what _you_ placed as the flags in the project settings
Sure it parses. Maybe I have another definition of parsing. Cmake generates the compile commands, codelitegcc parses the passed arguments, puts them into compilation.db and then calls the passed arguments in a subshell. That’s how I understand it.
eranif wrote:Does your project compile properly?
If it does, then I would expect that the code completion will work
Yes it compiles, but code completion actually fails. Believe it or not, but clang has bugs! ;-) It may well be related to the c++11 mode. You can try it yourself, activate c++11 and include <boost/optional/optional.hpp> (in linux with clang 3.3)


rgds, Kira

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