Hello Eran and asmwarrior!
I have seen something similar with a mingw-w64 build.
(I have taken the liberty of cross-posting this reply to the mingw-w64
list.)
On Fri, Jul 20, 2012 at 9:46 PM, asmwarrior <asmwarr...@gmail.com> wrote:
> On 2012-7-20 21:10, Eran Ifrah wrote:
>> Hello,
>>
>> I am not sure whether this issue is related to MinGW or to GDB.
>> Since I don't have this issue on Linux / Mac and it only happens on Windows
>> 7 + MinGW, I decided to post it here - maybe someone else on this list face
>> this issue
I am running a 64-bit mingw-w64 build on 64-bit windows 7, and see
slow gdb startup with Qt applications. (I haven't tested whether
startup is also slow with simple non-Qt console programs.)
>> in the past and can shed some light / provide some good tips on the matter.
>>
>> Now to the actual problem:
>> When I debug my application which consists of many shared libraries ("dll"s,
>> around 35 - 40) and I have a breakpoint set in one of the shared libraries
>> the startup time of gdb is *very* slow ( I am talking here about 10 mins ).
In my case I do not have pre-set breakpoints.
When I run gdb on a small Qt test program, (e.g. "gdb test.exe")
the gdb prompt appears essentially immediately, but when I then
type "run" it takes about three minutes for the test application to
actually launch (i.e., for the gui to appear).
Once I get past that slow startup, debugging seems to run normally.
>> ...
>> Some info about my environment:
>>
>> MinGW 4.6.1 (TDM) 32 bit - I tried the official one 4.7 from MinGW with no
>> luck - the problem persists
>> GDB 7.05 (note that I tried all versions of gdbs available on MinGW SF
>> download page, from 6.8.5 -> 7.4 with no luck)
>> Windows 7 64bit
In my case I am running:
g++ (GCC) 4.7.0 20110829 (experimental)
GNU gdb (GDB) 7.3.0.20110829-cvs
from a native 64-bit Ruben "personal build" of g++ 4.7.0, and
Qt 4.8.0-rc1.
(I don't have any reason to think the slow gdb startup is related
to Qt -- I just haven't bothered to test it on non-Qt applications.)
It is worth noting that this problem first showed up for me (or at
least became noticeably worse) recently -- I think the last time
I upgraded my compiler / Qt combination. I don't recall, offhand,
the g++ build / gdb version that I had been using previously that
did not have the slow startup problem (or at least not as badly).
>> ...
>> Any advise?
No, but if anybody gets this issue sorted out, I would love to hear
about it.
>> ...
>> Eran Ifrah
>> Author of the cross platform, open source C++ IDE: http://www.codelite.org
>>
> Hi, Eran
>
> I meet such problem years before, but it was fixed in the gdb trunk months
> ago.
> I'm not sure the mingw gdb official 7.4 have this fixed, but from my test,
> the slow loading problem is already solved.
As I mentioned above, my gdb version is 7.3.0.
> You can try a recent gdb (mostly the gdb build from gdb cvs HEAD)
If anybody knows of a recent mingw or mingw-w64 build of gdb
that addresses this issue, please chime in.
> ...
> asmwarrior
Thanks for any updates on this problem.
K. Frank
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