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problems in combining release and debug libraries to get and executable
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| wolverine 2007-03-27, 8:15 am |
| Hi,
Assume i have a library "libabc.a" which is build in debug ( -g
flag) mode and another library "libxyz.a" which is build in release (-
O2 flag) mode. Then if i link these 2 libraries like
1) g++ -g test.cpp -labc -lxyz (debug build)
2) g++ -O2 test.cpp -labc -lxyz (release build)
Will any of the above 2 builds result in a incorrect executable ?
Thanks in Advance
Kiran.
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| Bin Chen 2007-03-27, 10:08 pm |
| On Mar 27, 8:59 pm, "wolverine" <kiran.ha...@gmail.com> wrote:
> Hi,
> Assume i have a library "libabc.a" which is build in debug ( -g
> flag) mode and another library "libxyz.a" which is build in release (-
> O2 flag) mode. Then if i link these 2 libraries like
>
> 1) g++ -g test.cpp -labc -lxyz (debug build)
>
> 2) g++ -O2 test.cpp -labc -lxyz (release build)
>
> Will any of the above 2 builds result in a incorrect executable ?
No, if is, it is the bug of g++.
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| Ulrich Eckhardt 2007-03-27, 10:08 pm |
| wolverine wrote:
> Assume i have a library "libabc.a" which is build in debug ( -g
> flag) mode and another library "libxyz.a" which is build in release (-
> O2 flag) mode.
Often, the difference is not just the -O2/-g but also a -DNDEBUG in release
mode. If this changes anything in the interface(!) of the library, this
will lead to problems.
> Then if i link these 2 libraries like
>
> 1) g++ -g test.cpp -labc -lxyz (debug build)
>
> 2) g++ -O2 test.cpp -labc -lxyz (release build)
>
> Will any of the above 2 builds result in a incorrect executable ?
From what you said, not necessarily.
Uli
--
http://www.erlenstar.demon.co.uk/unix/
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| wolverine 2007-03-28, 4:18 am |
| On Mar 27, 10:00 pm, Ulrich Eckhardt <dooms...@knuut.de> wrote:
> wolverine wrote:
>
> Often, the difference is not just the -O2/-g but also a -DNDEBUG in release
> mode. If this changes anything in the interface(!) of the library, this
> will lead to problems.
>
>
>
>
>
> From what you said, not necessarily.
Why did you say "From what you said" ?. Is there any case in which
linking debug and release build libraries can cause problems ?
>
> Uli
>
> --http://www.erlenstar.demon.co.uk/unix/
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