[SCIP] linker error when building soplex

[Ziye Tang]

Dear SCIP team,

I am compiling scipoptsuite on a rhel8 server via cmake. I am using cplex
as my LP solver and have specified LPS, INCLUDE_DIRS and LIB flags. When
cmake finishes, I tried to run make. Here's the error I got:

[  3%] Linking CXX executable ../../bin/soplex
/usr/bin/ld: CMakeFiles/soplex.dir/soplexmain.cpp.o: undefined reference to
symbol '_ZNSo9_M_insertIdEERSoT_@@GLIBCXX_3.4.9'
//usr/lib64/libstdc++.so.6: error adding symbols: DSO missing from command
line
collect2: error: ld returned 1 exit status
make[2]: *** [soplex/src/CMakeFiles/soplex.dir/build.make:86: bin/soplex]
Error 1
make[1]: *** [CMakeFiles/Makefile2:182:
soplex/src/CMakeFiles/soplex.dir/all] Error 2
make: *** [Makefile:163: all] Error 2

I don't understand this linker error. It would be great if someone could
point me in the right direction. Also, if I am only using scip (with cplex
as LP solver), is there a make target I could build? A while ago I tried
make scip but I've got some other errors when using scip.
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