Re: Linker shows "has different visibility" warning (2nd)
Re: Linker shows "has different visibility" warning (2nd)
- Subject: Re: Linker shows "has different visibility" warning (2nd)
- From: Dieter Oberkofler <email@hidden>
- Date: Sat, 12 Jan 2008 09:01:59 +0100
Thank you for all the replies.
I'm starting to understand but there is still one loose end: When
switching from XCode 2.4.1 on 10.4 to XCode 2.5 on 10.5 all build
scripts remained the same (the visibility flags in the different 3rd
party libraries and my own build scripts remained unchanged) but
before there where no warning and now I have several thousand warning
in a single link. The gcc version stayed the same, so where does this
come from?
Thank you,
Dieter
On 11.01.2008, at 18:44, Jerry wrote:
The solution seems to compile all the libraries you use with -
fvisibility=default or decorate all your source code with visibility
attributes, but this is no good if you're relying on third-party
libraries for which you don't have the source. I've managed to get
my warnings down to 10000 on every build, but build time is doubled
by the time it takes to print out all those messages. My actual
solution is to revert to Tiger for development, which also solves a
host of other linking problems, such as those associated with using
libcurl, and as a bonus I don't have kernel panics every half hour
any more.
Jerry
On 11 Jan 2008, at 16:40, Alexander von Below wrote:
Yes, it has been a topic on this list ... but a search of the
archives does not even yield my own posts about it :-/
So this should answer your questions:
http://developer.apple.com/documentation/DeveloperTools/Conceptual/CppRuntimeEnv/Articles/SymbolVisibility.html
HTH
Alex
Am 11.01.2008 um 16:43 schrieb Dieter Oberkofler:
After upgrading from XCode 2.4.1 to 2.5 running on Leopard the
linker shows me thousands of "has different visibility" warnings.
(ld: warning __ZN13PWR_CStringRWC2ERKS_.eh has different
visibility (1) in /MyDev/LJS_DEV/app/trunk_build/debug/
libLJS_SQL_LIB.a(costcentre.o) and (2) in /MyDev/LJS_DEV/app/trunk/
xvt/mac/lib/libXVTPWRd.a(CTdiPackage.o))
Has someone already solved this one?
Thank you
Dieter
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