Install error with absil-cpp

[han-kyung-min]

Dear Cartographer team,

Thanks for the nice SW.

I was able to install the cartographer with the standard tutorial. Then, I tried to install another version of cartographer.

While I was trying to install the another cartographer package, I got into a trouble with the error message below. Could you please give me a piece of advice to resolve this issue ?

`

ninja -j8 -l8 in '/home/hankm/larics_ws/build_isolated/cartographer/install' ninja: error: build.ninja:6027: multiple rules generate abseil/src/abseil-build/absl/synchronization/libabsl_synchronization.a [-w dupbuild=err]

<== Failed to process package 'cartographer': Command '['ninja', '-j8', '-l8']' returned non-zero exit status 1.

Reproduce` this error by running: ==> cd /home/hankm/larics_ws/build_isolated/cartographer && ninja -j8 -l8