[cmake-developers] Apple tests for target_link_libraries failing

[Stephen Kelly]

Rolf Eike Beer wrote:

>> I'm not certain that's correct though. Those flags don't seem to be used
>> when I build. I also don't know what those flags do.
>>
>> Linking CXX executable exec
>> /home/stephen/dev/qt48/kde/bin/cmake -E cmake_link_script
>> CMakeFiles/exec.dir/link.txt --verbose=1
>> /usr/lib/icecc/bin/c++       CMakeFiles/exec.dir/main.cpp.o  -o exec -
>> rdynamic lib/liblibC.so
>> -Wl,-rpath,/home/stephen/cmaketest/test19/build/lib
>> -Wl,-rpath-link,/home/stephen/cmaketest/test19/build/lib
>> CMakeFiles/exec.dir/main.cpp.o:main.cpp:function main: error: undefined
>> reference to 'classB::classB()'
>> collect2: ld returned 1 exit status
>> make[2]: *** [exec] Error 1
>> make[2]: Leaving directory `/home/stephen/cmaketest/test19/build'
> 
> Maybe this is just the default setting for your binutils. Try
> LDFLAGS=-Wl,--copy-dt-needed-entries,-no-as-needed and see what happens. I
> bet this will change the behavior on your system.
> 

ld now gives a new error:

/usr/bin/ld: error: --copy-dt-needed-entries is not supported but is 
required for liblibA.so in lib/liblibC.so

Here's a more complete fragment:

Linking CXX executable exec
/home/stephen/dev/qt48/kde/bin/cmake -E cmake_link_script 
CMakeFiles/exec.dir/link.txt --verbose=1                                         
/usr/lib/icecc/bin/c++      -Wl,--copy-dt-needed-entries,-no-as-needed 
CMakeFiles/exec.dir/main.cpp.o  -o exec -rdynamic lib/liblibC.so -Wl,-
rpath,/home/stephen/cmaketest/test19/build/lib -Wl,-rpath-
link,/home/stephen/cmaketest/test19/build/lib 
/usr/bin/ld: error: --copy-dt-needed-entries is not supported but is 
required for liblibA.so in lib/liblibC.so
CMakeFiles/exec.dir/main.cpp.o:main.cpp:function main: error: undefined 
reference to 'classB::classB()'
collect2: ld returned 1 exit status

I also ran ctest -V -R target_link_librares with those flags and many more 
tests failed.

I have no idea what those flags do, so I don't know if that new error is a 
lead.

Thanks,

Steve.