GCC version for MS Windows packages

[marfi]

Hi Eran,
you have told me some time ago that you intend to use MinGW/GCC 4.4.0 in next CL packages/installers for Windows. Which MinGW/GCC distribution version do you plan to use? Will it include OpenMP support? I suggest to use one of GCC compilers provided by TDM (see http://www.tdragon.net/recentgcc/ ) at least because of included support for OpenMP and pthreads. The best choice is probably GCC with SJLJ Unwinding. I use it together with wxPack on Windows for a long time without any problem.

Best regards
Michal

[frank_frl]

Hi Marfi,

look here: http://codelite.org/forum/viewtopic.php?f=3&t=616

and here:http://sourceforge.net/project/shownote ... _id=691876

Regards,

Frank

[eranif]

I am NOT going to use TDM version, I am only using the official releases of MinGW project.
The current codelite (from trunk) is built with GCC4.4.0 - SJLJ, the version which is in the MinGW official

Eran

[frank_frl]

Hi Eran,

The current codelite (from trunk) is built with GCC4.4.0 - SJLJ, the version which is in the MinGW official

are you sure that you using SJLJ, since this is from the official readme for GCC4.4.0 from MinGW.org

Code: Select all

- Zero cost exceptions: New exception model Dwarf only has performance
  penalty when being thrown.  The old model, SJLJ, is no longer
  available.

And also the libgcc_s_dw2-1.dll dependency for the CodeliteIndexer insinuates that you are using Dwarf.

BTW if one don't needs exceptions across DLL boundaries, one can get rid of this dependency by using the '-static-libgcc' linker flag.

Frank

[marfi]

And what about the OpenMP support? Is it included in your build? It is a great GCC's addon and the only free way how to create fully parallelized applications using OpenMP stardard language extension (Intel C++ and MS VC++ support OpenMP in paid versions only).

[eranif]

Is it included in your build?

I am NOT building GCC myself, I am using the *official* release. The only thing that I am doing, is packaging it

And what about the OpenMP support?

I am not familiar with this (I dont even know if it is a DLL, standard or whatever ) . However, if OpenMP is available for download from MinGW download page, and its size is relatively small, I dont mind to including it.

If it requires different build for the GCC - I am not going to build GCC myself, this is not my intention.

are you sure that you using SJLJ

You are correct, its DW2

I forgot to mention: my current package also includes pthreads
Eran

[marfi]

marfi wrote:
And what about the OpenMP support?

I am not familiar with this (I dont even know if it is a DLL, standard or whatever ) . However, if OpenMP is available for download from MinGW download page, and its size is relatively small, I dont mind to including it.

OpenMP is a standard for creation of parallelized applications on SMP machines (it meas on all multi-core/multi-cpu PCs, etc.). It allows you to parallelize your code using special preprocessor commands and library functions (you can parallelize even for-loop iterations!). It is part of GCC from 4.2.x (see http://gcc.gnu.org/projects/gomp/ ) and it internally uses pthreads. If you provide pthreads than it is possible you provide also OpenMP

[eranif]

Well, according to the gcc4.4.0 release notes, it is already there (along with pthread), but for pthread I knew what to look for

Eran

[frank_frl]

Here is a document how to use OpenMP with GCC
http://www.ipd.uni-karlsruhe.de/multico ... OpenMP.pdf

Frank