/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'|
@PETER96
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.
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)) ===|
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.
You may need to verify the version of glibc installed on the machine.
# yum list glibcLoaded plugins: fastestmirror, langpacksLoading mirror speeds from cached hostfile * base: anorien.csc.warwick.ac.uk * extras: centos.mirroring.pulsant.co.uk * updates: centos.mirrors.nublue.co.ukInstalled Packagesglibc.i686 2.17-222.el7 @baseglibc.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 dlopendlopendlopen.cdlopen_doitdlopenold.c__dlopen_check__dlopendlopen@@GLIBC_2.2.5
I check version below
glibc.x86_64 2.17-157.el7 Available Packagesglibc.i686 2.17-222.el7 glibc.x86_64 2.17-222.el7
dlopendlopen.cdlopen_doitdlopenold.c__dlopen_check__dlopendlopen@@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」|
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
From my test, the order of Elektron libraries in the link options is matter. -lrsslVA should be before -lrssl.
Thank you for your answer.
