/usr/bin/ld: /home/pan/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Eta/Libs/RHEL6_64_GCC444/Debug/librssl.a(rsslImpl.c.o)||undefined reference to symbol 'dlclose@@GLIBC_2.2.5'|
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'dlclose@@GLIBC_2.2.5' on centos 7.3 with gcc 4.8.5
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Is the reply below satisfactory in resolving your query? If yes, please click the 'Accept' text next to the reply. This will guide all community members who have a similar question. Otherwise please post again offering further insight into your question.
Thanks,
AHS
Hello @PETER96
Thank you for your participation in the forum.
Is the reply below satisfactory in resolving your query? If yes, please click the 'Accept' text next to the reply. This will guide all community members who have a similar question. Otherwise please post again offering further insight into your question.
Thanks,
AHS
Please be informed that a reply has been verified as correct in answering the question, and has been marked as such.
Thanks,
-AHS
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It states in the README that:
This Release has been tested with the following: - Red Hat Advanced Server 6.0 Update 2 Release 64-bit with GCC 4.4.4 (RHEL_6_64_GCC444) - Oracle Linux Server 6.0 Update 4 64-bit with UPA Lib GCC 4.4.4 (RHEL6_64_GCC444) - Oracle Linux Server 7.0 64-bit with GCC 4.8.2 (OL7_64_GCC482) - CentOS 7.0 64-bit with GCC 4.8.2 (OL7_64_GCC482)
For CentOS 7.x with GCC 4.8.5, the application should link to librssl.a from OL7_64_GCC482. Therefore, the correct location for librssl.a is /home/pan/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Eta/Libs/OL7_64_GCC482/Debug/librssl.a.
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I change link then
||=== Build: Debug in fmarketrueter (compiler: GNU GCC Compiler) ===| /usr/bin/ld: /home/pan/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Eta/Libs/OL7_64_GCC482/Debug/librssl.a(rsslImpl.c.o)||undefined reference to symbol 'dlclose@@GLIBC_2.2.5'| ||=== Build failed: 1 error(s), 0 warning(s) (0 minute(s), 11 second(s)) ===|
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Have you added -ldl in the linker options? It requires -lnsl -lpthread -lrt -ldl -lm.
If this doesn't solve the problem, please share your Makefile.
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You may need to verify the version of glibc installed on the machine.
# yum list glibc Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: anorien.csc.warwick.ac.uk * extras: centos.mirroring.pulsant.co.uk * updates: centos.mirrors.nublue.co.uk Installed Packages glibc.i686 2.17-222.el7 @base glibc.x86_64 2.17-222.el7 @base
If the application is built properly, it will link to /lib64/libdl.so.2.
# ldd CENTOS7_64_GCC482/Debug/Consumer
linux-vdso.so.1 => (0x00007ffd5c146000)
libnsl.so.1 => /lib64/libnsl.so.1 (0x00007fbe0a4fe000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fbe0a2e2000)
librt.so.1 => /lib64/librt.so.1 (0x00007fbe0a0da000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007fbe09ed6000)
libm.so.6 => /lib64/libm.so.6 (0x00007fbe09bd4000)
libc.so.6 => /lib64/libc.so.6 (0x00007fbe09807000)
/lib64/ld-linux-x86-64.so.2 (0x00007fbe0a718000)
/lib64/libdl.so.2 will have dlopen@@GLIBC_2.2.5.
# strings /lib64/libdl.so.2 | grep dlopen dlopen dlopen.c dlopen_doit dlopenold.c __dlopen_check __dlopen dlopen@@GLIBC_2.2.5
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I check version below
glibc.x86_64 2.17-157.el7 Available Packages glibc.i686 2.17-222.el7 glibc.x86_64 2.17-222.el7
dlopen dlopen.c dlopen_doit dlopenold.c __dlopen_check __dlopen dlopen@@GLIBC_2.2.5
My linker option -lpthread -lema -lxml2 -lrssl -lrsslVA -ldl -lnsl -lrt -ldl -lm
but
/home/pan/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Eta/Libs/OL7_64_GCC482/Debug/librsslVA.a(rsslReactor.c.o)||In function `_reactorTakeChannel':| /local/jenkins/workspace/ESDKCore/OS/OL7-64/esdk/Cpp-C/Eta/Impl/Reactor/rsslReactor.c|176|未定義參考到「rsslCreateNotifierEvent」|
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From my test, the order of Elektron library in the link options is matter. The -lrsslVA must be before -lrssl.
-lpthread -lema -lxml2 -lrsslVA -lrssl -ldl -lnsl -lrt -ldl -lm
The full commands are:
/usr/bin/g++ -c -m64 -D_REENTRANT -DLinux -O3 -DCOMPILE_64BITS -I/api/setup/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Ema/Src/Include -I/api/setup/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Ema/Src -o CENTOSL7_64_GCC482/Optimized/obj/Consumer.o Consumer.cpp /usr/bin/g++ -o CENTOSL7_64_GCC482/Optimized/Consumer100 CENTOSL7_64_GCC482/Optimized/obj/Consumer.o -L/api/setup/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Eta/Libs/OL7_64_GCC482/Debug -L/api/setup/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Ema/Libs/OL7_64_GCC482/Debug -lpthread -lema -lxml2 -lrsslVA -lrssl -ldl -lnsl -lrt -ldl -lm
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From my test, the order of Elektron libraries in the link options is matter. -lrsslVA should be before -lrssl.
-lpthread -lema -lxml2 -lrsslVA -lrssl -ldl -lnsl -lrt -ldl -lm
The full commands are:
/usr/bin/g++ -c -m64 -D_REENTRANT -DLinux -O3 -DCOMPILE_64BITS -I/api/setup/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Ema/Src/Include -I/api/setup/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Ema/Src -o CENTOSL7_64_GCC482/Optimized/obj/Consumer.o Consumer.cpp /usr/bin/g++ -o CENTOSL7_64_GCC482/Optimized/Consumer100 CENTOSL7_64_GCC482/Optimized/obj/Consumer.o -L/api/setup/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Eta/Libs/OL7_64_GCC482/Debug -L/api/setup/Elektron-SDK1.2.1.linux.rrg/Cpp-C/Ema/Libs/OL7_64_GCC482/Debug -lpthread -lema -lxml2 -lrsslVA -lrssl -ldl -lnsl -lrt -ldl -lm
