Attempted to rebuild eztrace with the libomp built with -Wl,-Bsymbolic and it didn't help.

Correct version of libomp downloaded:

Get:108 http://ftpmaster.internal/ubuntu mantic-proposed/universe amd64 libomp5-15 amd64 1:15.0.7-4ubuntu2 [480 kB]

(https://launchpad.net/ubuntu/+source/eztrace/2.0+repack-12/+build/26015911)

expected linker options when building libomp:

[2100/2653] : && /<<PKGBUILDDIR>>/build-llvm/./bin/clang --target=x86_64-pc-linux-gnu -fPIC -fstack-protector-strong -Wformat -Werror=format-security -Wno-unused-command-line-argument -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -fno-semantic-interposition -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wstring-conversion -Wmisleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -fdebug-prefix-map=/<<PKGBUILDDIR>>/build-llvm/runtimes/runtimes-bins=build-llvm/runtimes/runtimes-bins -fdebug-prefix-map=/<<PKGBUILDDIR>>/= -no-canonical-prefixes -ffile-prefix-map=/<<PKGBUILDDIR>>/build-llvm/runtimes/runtimes-bins=build-llvm/runtimes/runtimes-bins -ffile-prefix-map=/<<PKGBUILDDIR>>/= -no-canonical-prefixes -Wall -Wcast-qual -Wformat-pedantic -Wimplicit-fallthrough -Wsign-compare -Wno-extra -Wno-pedantic -O3 -DNDEBUG  -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,--build-id -Wl,-z,defs -Wl,-z,nodelete -fuse-ld=gold  -Wl,--warn-shared-textrel -Wl,--as-needed -Wl,--version-script=/<<PKGBUILDDIR>>/openmp/runtime/src/exports_so.txt -static-libgcc -Wl,-z,noexecstack -Wl,-Bno-symbolic -shared -Wl,-soname,libomp.so.5 -o openmp/runtime/src/libomp.so.5 openmp/runtime/src/CMakeFiles/omp.dir/kmp_alloc.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_atomic.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_csupport.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_debug.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_itt.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_environment.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_error.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_global.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_i18n.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_io.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_runtime.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_settings.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_str.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_tasking.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_threadprivate.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_utility.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_barrier.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_wait_release.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_affinity.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_dispatch.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_lock.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_sched.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/z_Linux_util.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_gsupport.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/thirdparty/ittnotify/ittnotify_static.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_taskdeps.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_cancel.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_ftn_cdecl.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_ftn_extra.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/kmp_version.cpp.o openmp/runtime/src/CMakeFiles/omp.dir/z_Linux_asm.S.o  -lm  -ldl && cd /<<PKGBUILDDIR>>/build-llvm/runtimes/runtimes-bins/openmp/runtime/src && /usr/bin/cmake -E create_symlink libomp.so.5 libgomp.so && /usr/bin/cmake -E create_symlink libomp.so.5 libiomp5.so

https://launchpad.net/ubuntu/+source/llvm-toolchain-15/1:15.0.7-4ubuntu2/+build/26311876

Per https://bugs.launchpad.net/ubuntu/+source/llvm-defaults/+bug/1899199/comments/6:

$ apt policy libomp5-15
libomp5-15:
  Installed: 1:15.0.7-4ubuntu2
  Candidate: 1:15.0.7-4ubuntu2
  Version table:
 *** 1:15.0.7-4ubuntu2 990
        990 http://archive.ubuntu.com/ubuntu mantic-proposed/universe amd64 Packages
        100 /var/lib/dpkg/status
     1:15.0.7-4ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu mantic/universe amd64 Packages
$ readelf --relocs /usr/lib/x86_64-linux-gnu/libomp.so.5 | grep ompt
$

So, I don't know why "-Wl,-Bsymbolic-functions -Wl,-Bno-symbolic" is not having the documented effect.