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CPM & building: must call `cmake -S all -B build` twice before `cmake --build build` become successful

rm -rf build && cmake -S all -B build && cmake --build build fails at cmake --build build:

[  5%] Building CXX object _deps/fmt-build/CMakeFiles/fmt.dir/src/format.cc.o
[ 10%] Building CXX object _deps/fmt-build/CMakeFiles/fmt.dir/src/os.cc.o
[ 15%] Linking CXX static library libfmt.a
[ 15%] Built target fmt
[ 21%] Building CXX object _deps/greeter-build/CMakeFiles/Greeter.dir/source/greeter.cpp.o
[ 26%] Linking CXX shared library libGreeter.so
/usr/bin/ld: ../fmt-build/libfmt.a(format.cc.o): relocation R_X86_64_PC32 against symbol `_ZTVN3fmt2v812format_errorE' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status
make[2]: *** [_deps/greeter-build/CMakeFiles/Greeter.dir/build.make:98: _deps/greeter-build/libGreeter.so] Error 1
make[1]: *** [CMakeFiles/Makefile2:340: _deps/greeter-build/CMakeFiles/Greeter.dir/all] Error 2
make: *** [Makefile:166: all] Error 2

But rm -rf build && cmake -S all -B build && cmake -S all -B build && cmake --build build succeeds.

My guess

When building InfluxDB-CXX, there's something awry about the building process that sets or unsets some flags on the environment variable level. These environment variables carry onto the next build stage and makes it fail somehow.

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