[CMake] CMAKE_DL_LIBS

[J. Caleb Wherry]

That link looks fine to me. You might want to verify that the CMAKE_DL_LIBS
variable actually contains what it should on your system (or a least
contains what it should right before using it).

You could explicitly add the "-dl" to that link statement and see if that
works. That's what that variable should contain anyways on Linux boxes.

-Caleb

(Pasting off list response below)

Thanks, Caleb. Are you saying that I need to add "-ldl" link lib in
addition to ${CMAKE_DL_LIBS} ?


My CMake file is here:

https://github.com/GrokImageCompression/opendcp/blob/master/cli/CMakeLists.txt

and the lines for the exe that is not linking are found here:

TARGET_LINK_LIBRARIES(opendcp_j2k ${CMAKE_DL_LIBS} ${OPENDCP_LIB} )


This is an open source proj, by the way. I can send you a few short lines
about how to build on Ubuntu, if you are interested.

Thanks very much for your help.


Aaron

On Tuesday, March 1, 2016, Aaron Boxer <boxerab at gmail.com> wrote:

>
>
> On Tue, Mar 1, 2016 at 9:06 AM, Aaron Boxer <boxerab at gmail.com
> <javascript:_e(%7B%7D,'cvml','boxerab at gmail.com');>> wrote:
>
>> Hello!
>> I have a CMAKE project that creates an executable that links with a
>> static lib
>> from a second CMAKE project. The static lib requires the dlopen and
>> dlclose
>> symbols.
>>
>> So, when I link the first project, I add ${CMAKE_DL_LIBS} to the CMake
>> file.
>>
>> However, I still get an error about "undefined reference to symbol
>> "dlclose...."
>>
>
> The error states: "missing DSO from command line"
>
> Also, the second CMAKE project also contains executables that link with
> the static
> library, and they link with no problem.
>
>
>
>
>

-- 
Sent from my iPhone 4s
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