"IPO / LTO not supported", "relocation R_X86_64_32 can not be used when making a shared object" for clang++

[native-api]

/usr/bin/ld: /usr/local/clang-7.0.0/bin/../lib/LLVMgold.so: error loading plugin: /usr/local/clang-7.0.0/bin/../lib/LLVMgold.so: cannot open shared object file: No such file or directory

Xenial image includes clang without LLVMgold support

xenial images include clang: clang version 7.0.0 (tags/RELEASE_700/final) Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /usr/local/clang-7.0.0/bin however, using clang -flto crashes: /usr/bin/ld: /usr/local/clang-7.0.0/bin/…/lib/LLVMgold.so: error loading plugin: /usr/local/clang-7.0.0/bin/…/lib/LLVMgold.so: cannot open shared object file: No such file or directory clang-7: error: linker command failed with exit code 1 (use -v to see invocation)

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/usr/bin/ld: ../libAIToolboxFMDP.a(JointActionLearner.cpp.o): relocation R_X86_64_32 against symbol `__gxx_personality_v0@@CXXABI_1.3' can not be used when making a shared object; recompile with -fPIC

Looks like ../libAIToolboxFMDP.a was compiled without -fPIC

Compilation fails with "relocation R_X86_64_32 against `.rodata.str1.8' can not be used when making a shared object"

Linking a static library into a shared library without -fPIC