gem install Failed to build gem native extension can t find header files

Question

I am using Fedora 14 and I have MySQL and MySQL server 5 1 42 installed and running  Now I tried to do this as root user   gem install mysql   But I get this error   Building native extensions   This could take a while    ERROR   Error installing mysql      ERROR  Failed to build gem native extension    usr bin ruby extconf rb mkmf rb can t find header files for ruby at  usr lib ruby ruby h   Gem files will remain installed in  usr lib ruby gems 1 8 gems mysql-2 8 1 for inspection  Results logged to  usr lib ruby gems 1 8 gems mysql-2 8 1 ext mysql api gem make out   What s wrong here  In installed ruby 1 8 7  and the latest rubygems 1 3 7

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This worked for me   yum -y install gcc mysql-devel ruby-devel rubygems

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Red Hat  Fedora   sudo dnf -y install gcc-c   redhat-rpm-config ruby-devel gcc mysql-devel rubygems

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it seems that the  yum install ruby-devel   was enough for me to perform  gem install datamapper   afterwards   It s possible that you will need to install another packages   yum install gcc gcc-c     to be able to build native extensions

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You need following packages instaled    ruby-dev gcc libffi-dev make   Here s the command for debian distro    sudo apt install gcc ruby-dev rubygems libgmp-dev libgmp3-dev make

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Just to add path to ruby h file in my PATH for example       export PATH  PATH  usr src ruby-xxxxxx

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If you have gem installed and ruby and not able to install rails  then install ruby dev lib   sudo apt-get install ruby-dev   It works for me  I have tried the different solution

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For those who may be confused by the accepted answer  as I was  you also need to have the ruby headers installed  ruby-devel    The article that saved my hide is here   And this is the revised solution  note that I m on Fedora 13    yum -y install gcc mysql-devel ruby-devel rubygems gem install -y mysql -- --with-mysql-config  usr bin mysql config   For Debian  and other distributions using Debian style packaging the ruby development headers are installed by   sudo apt-get install ruby-dev   For Ubuntu  the ruby development headers are installed by   sudo apt-get install ruby-all-dev   If you are using a earlier version of ruby  such as 2 2   then you will need to run   sudo apt-get install ruby2 2-dev    where 2 2 is your desired Ruby version

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MAC users may face this issue when xcode tools are not installed properly  Below is the command to get rid of the issue   xcode-select --install

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My initial solution was to resolve the above errors by installing ruby-devel  patch and rubygems    My issue was a bit different as bcrypt 3 1 11 still had issues compiling and installing on Fedora 23  I needed additional packages  So after ensuring I had the above installed  I was still having issues   gcc  error  conftest c  No such file or directory  gcc  error   usr lib rpm redhat redhat-hardened-cc1  No such file or directory  From here I had to do the following    I ensured that I wasn t lacking any C compiler tools sudo dnf group install  C Development Tools and Libraries  Then I ran sudo dnf install redhat-rpm-config to resolve the gcc issue listed above    You can find a write up here on Fedore Project  You may also find answers to other needs as well

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in openSUSE   zypper in ruby-devel   Works to me

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sudo apt-get install ruby-dev   This command solved the problem for me

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For those that are still experiencing problems  like I have I am using Ubuntu 16 04   I had to put in the following commands in order to get some gems like bcrypt  pg  and others installed   They are all similar to the ones above except for one   sudo apt-get install ruby-dev -y sudo apt-get install libpq-dev -y sudo apt-get install libmysqlclient-dev sudo apt-get install build-essential patch -y   This allowed me to install gems like  PG  bcrypt  and recaptcha

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I found the solution here     yum install mysql-devel gcc make   gem install mysql -- --with-mysql-config  usr bin mysql config

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It s necessary to install redhat-rpm-config to  I guess it solve your problem

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Red Hat  Fedora   yum -y install gcc mysql-devel ruby-devel rubygems gem install -y mysql -- --with-mysql-config  usr bin mysql config   Debian  Ubuntu   apt-get install libmysqlclient-dev ruby-dev gem install mysql   Arch Linux   pacman -S libmariadbclient gem install mysql

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You might have messed up with the RVM   Try to do     curl -sSL https   get rvm io   bash -s stable --rails

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This post helped me  Thanks a lot   On Linux  Ubuntu 12 10  I needed to run  sudo apt-get install ruby sudo apt-get install rubygems sudo apt-get install ruby-dev   before I could succesfully run  sudo gem install jekyll

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For anyone reading this in 2015  if you happened to install the package ruby2 0  you need to install the matching ruby2 0-dev to get the appropriate Ruby headers  The same goes for ruby2 1 and ruby2 2  etc  For example     sudo apt-get install ruby2 2-dev

[mysql] gem install: Failed to build gem native extension (can't find header files)

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