Hera fails to build with latest evmc

[jwasinger]

> cmake -DHERA_DEBUGGING=ON -DBUILD_SHARED_LIBS=ON .
> make -j8
...
...
[100%] Linking CXX shared library libhera.so
/usr/bin/ld: ../evmc/lib/instructions/libevmc-instructions.a(instruction_names.c.o): relocation R_X86_64_32S against `.rodata' can not be used when making a shared object; recompile with -fPIC
../evmc/lib/instructions/libevmc-instructions.a: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
src/CMakeFiles/hera.dir/build.make:130: recipe for target 'src/libhera.so' failed
make[2]: *** [src/libhera.so] Error 1
CMakeFiles/Makefile2:498: recipe for target 'src/CMakeFiles/hera.dir/all' failed
make[1]: *** [src/CMakeFiles/hera.dir/all] Error 2
Makefile:149: recipe for target 'all' failed
make: *** [all] Error 2

[chfast]

Weirdly I cannot reproduce it.

The workaround is to add additional cmake arg: -DCMAKE_POSITION_INDEPENDENT_CODE=ON.

I'm working on a bit more pleasant solution.