Compile Error: async.c:243:14: error: variable ‘count’ set but not used

[JiangXL]

I try to compile guile 1.8 from this source, but it failed:
async.c: In function ‘scm_i_queue_async_cell’: async.c:243:14: error: variable ‘count’ set but not used [-Werror=unused-but-set-variable] size_t count ; ^~~~~
Running environment: Debian 9(arm64) container inside chrome os .

ANY IDEA IS WELCOME!

[da-liii]

Well, this is a compiler option. You may use -Wnoerror=unused-but-variable.

[fedelibre]

For the records, I'm compiling guile 1.8.8 with gcc 9.2.0 and it seems that the correct compiler option is -Wno-unused-but-set-variable. Found out in config.log:

gcc: error: unrecognized command line option '-Wnoerror=unused-but-set-variable'; did you mean '-Wno-unused-but-set-variable'?