GCC compilation error when installing Nokogiri

问题

I'm trying to run bundle install but I'm getting the Error while trying to Install Nokogiri 1.10.3

Here is the error message from mkmf.log.

gcc -o conftest -I/home/chille/.rvm/rubies/ruby-2.5.1/include/ruby-2.5.0/x86_64-linux -I/home/chille/.rvm/rubies/ruby-2.5.1/include/ruby-2$
gcc: error: unrecognized command line option '-Wmisleading-indentation'
gcc: error: unrecognized command line option '-Wimplicit-fallthrough=0'
gcc: error: unrecognized command line option '-Wduplicated-cond'
gcc: error: unrecognized command line option '-Wrestrict'

回答1:

For those who do not read comments

Debian 10 users, if you find

 gcc: error: unrecognized command line option '-Wduplicated-cond'

in mkmf.log

brew unlink gcc

is what you are looking for. I spend an hour looking for an answer and yes, i once missed the answer here, but luckily i have returned and spotted it.

回答2:

I had faced a similar issue. My default compiler did not recognise certain command line options just like you are facing.

My gcc version was 10. I could solve it by adding an older gcc version (5.5) and set it as default for the gem installation purpose. I followed the step given in this thread to do so.

来源：https://stackoverflow.com/questions/56567095/gcc-compilation-error-when-installing-nokogiri