title: Error install RMysql RHEL 7.3
body: <p>I am using:
  R version: 3.3.3.<br>
  OS: RHEL 7.3 on EC2.<br>
  I am trying to install RMysql.<br>
  So in R terminal I submit command: install.packages("RMySQL")</p>
  
  <p>First attempt was unsuccessful and gave error that <strong>libmysqlclient was not found</strong>.</p>
  
  <pre><code>Using PKG_LIBS=-lmysqlclient
  ------------------------- ANTICONF ERROR ---------------------------
  Configuration failed because libmysqlclient was not found. Try installing:
   * deb: libmariadb-client-lgpl-dev (Debian, Ubuntu 16.04)
          libmariadbclient-dev (Ubuntu 14.04)
   * rpm: mariadb-devel | mysql-devel (Fedora, CentOS, RHEL)
   * csw: mysql56_dev (Solaris)
   * brew: mariadb-connector-c (OSX)
  If libmysqlclient is already installed, check that 'pkg-config' is in your
  PATH and PKG_CONFIG_PATH contains a libmysqlclient.pc file. If pkg-config
  is unavailable you can set INCLUDE_DIR and LIB_DIR manually via:
  R CMD INSTALL --configure-vars='INCLUDE_DIR=... LIB_DIR=...'
  --------------------------------------------------------------------
  ERROR: configuration failed for package ‘RMySQL’
  * removing ‘/usr/lib64/R/library/RMySQL’
  
  The downloaded source packages are in
      ‘/tmp/Rtmpx1vsUG/downloaded_packages’
  Updating HTML index of packages in '.Library'
  Making 'packages.html' ... done
  Warning message:
  In install.packages("RMySQL") :
    installation of package ‘RMySQL’ had non-zero exit status
  </code></pre>
  
  <p>So I installed mysql-devel. <em>(sudo yum install mysql-devel)</em></p>
  
  <p>After this I am trying to install RMysql again.
  But that does not work again. Something is wrong with <strong>PKG_LIBS -lmariadb.</strong> </p>
  
  <p><em>gcc -m64 -std=gnu99 -shared -L/usr/lib64/R/lib -Wl,-z,relro -o RMySQL.so RMySQL-init.o connection.o db-apply.o driver.o exception.o fields.o result.o utils.o -L/usr/lib64/ -lmariadb -lpthread -ldl -lm -lssl -lcrypto -L/usr/lib64/R/lib -lR
  <strong>/bin/ld: cannot find -lmariadb</em></strong></p>
  
  <p>Here is the whole R output. </p>
  
  <pre><code>* installing *source* package ‘RMySQL’ ...
  ** package ‘RMySQL’ successfully unpacked and MD5 sums checked
  Found mysql_config cflags and libs!
  Using PKG_CFLAGS=-I/usr/include/mysql -I/usr/include/mysql/mysql
  Using PKG_LIBS=-L/usr/lib64/ -lmariadb -lpthread -ldl -lm -lssl -lcrypto
  ** libs
  gcc -m64 -std=gnu99 -I/usr/include/R -DNDEBUG -I/usr/include/mysql -I/usr/include/mysql/mysql -I/usr/local/include    -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic  -c RMySQL-init.c -o RMySQL-init.o
  gcc -m64 -std=gnu99 -I/usr/include/R -DNDEBUG -I/usr/include/mysql -I/usr/include/mysql/mysql -I/usr/local/include    -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic  -c connection.c -o connection.o
  gcc -m64 -std=gnu99 -I/usr/include/R -DNDEBUG -I/usr/include/mysql -I/usr/include/mysql/mysql -I/usr/local/include    -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic  -c db-apply.c -o db-apply.o
  gcc -m64 -std=gnu99 -I/usr/include/R -DNDEBUG -I/usr/include/mysql -I/usr/include/mysql/mysql -I/usr/local/include    -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic  -c driver.c -o driver.o
  gcc -m64 -std=gnu99 -I/usr/include/R -DNDEBUG -I/usr/include/mysql -I/usr/include/mysql/mysql -I/usr/local/include    -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic  -c exception.c -o exception.o
  gcc -m64 -std=gnu99 -I/usr/include/R -DNDEBUG -I/usr/include/mysql -I/usr/include/mysql/mysql -I/usr/local/include    -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic  -c fields.c -o fields.o
  gcc -m64 -std=gnu99 -I/usr/include/R -DNDEBUG -I/usr/include/mysql -I/usr/include/mysql/mysql -I/usr/local/include    -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic  -c result.c -o result.o
  gcc -m64 -std=gnu99 -I/usr/include/R -DNDEBUG -I/usr/include/mysql -I/usr/include/mysql/mysql -I/usr/local/include    -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic  -c utils.c -o utils.o
  gcc -m64 -std=gnu99 -shared -L/usr/lib64/R/lib -Wl,-z,relro -o RMySQL.so RMySQL-init.o connection.o db-apply.o driver.o exception.o fields.o result.o utils.o -L/usr/lib64/ -lmariadb -lpthread -ldl -lm -lssl -lcrypto -L/usr/lib64/R/lib -lR
  /bin/ld: cannot find -lmariadb
  collect2: error: ld returned 1 exit status
  make: *** [RMySQL.so] Error 1
  ERROR: compilation failed for package ‘RMySQL’
  * removing ‘/usr/lib64/R/library/RMySQL’
  
  The downloaded source packages are in
      ‘/tmp/RtmpYEs7XA/downloaded_packages’
  Updating HTML index of packages in '.Library'
  Making 'packages.html' ... done
  Warning message:
  In install.packages("RMySQL") :
    installation of package ‘RMySQL’ had non-zero exit status
  </code></pre>