[Ctk-developers] GCC visibility flags?

[Daniel Blezek]

Sascha,

  I just built on linux and didn't have this problem with linking.  Perhaps the flag isn't doing exactly what we expect?  Or is the Mac just more picky?  Can you easily tell?

Cheers,
-dan



On Jul 7, 2010, at 12:52 AM, Sascha Zelzer wrote:

> Hi Dan,
> 
> this is the closed issue for the change:
> 
> http://github.com/pieper/CTK/issues/closed#issue/10
> 
> I have not seen any linker wanings on my Linux machine yet, did you introduce new code (and what system are you running)?
> 
> The flags cannot easily be applied to external libraries, since symbols must be prefixed with the appropriate import/export specifiers in the .h files.
> 
> Best,
> Sascha
> 
> On 07/07/2010 04:12 AM, Daniel Blezek wrote:
>> Hi all,
>> 
>>   Can someone explain this code from the top level CTK CMakeLists.txt file?
>> 
>> #-----------------------------------------------------------------------------
>> # Set symbol visibility Flags
>> #
>> IF("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
>>   SET(VISIBILITY_CXX_FLAGS "-fvisibility=hidden -fvisibility-inlines-hidden")
>> ENDIF()
>> 
>> 
>> This causes all sorts of linker warnings because Log4Qt doesn't include the flag and CTK does.
>> 
>> Is this strictly necessary?  If so, can it be applied to the Externals as well?
>> 
>> Thanks,
>> -dan
>> 
>> --
>> Daniel Blezek
>> daniel.blezek at gmail.com
>> 
>> 
>> 
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> 
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--
Daniel Blezek
daniel.blezek at gmail.com