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MySQL detects on the build machine where the hostname program is located, and uses this value in a number of configuration files and scripts that are generated and installed in the target: output/target$ grep -r "bin/hostname" * etc/inittab:::sysinit:/bin/hostname -F /etc/hostname usr/share/mysql/mysql.server: pid_file=$datadir/mysqlmanager-`/usr/bin/hostname`.pid usr/share/mysql/mysql.server: server_pid_file=$datadir/`/usr/bin/hostname`.pid usr/bin/mysql_install_db:hostname=`/usr/bin/hostname` usr/bin/mysqld_safe: err_log=$DATADIR/`/usr/bin/hostname`.err usr/bin/mysqld_safe: pid_file="$DATADIR/`/usr/bin/hostname`.pid" However, the hostname on the build machine may not necessarily be at the same location as the hostname program on the target. Buildroot has its hostname program (coming from Busybox) in /bin, but some Linux distributions (such as Fedora) use /usr/bin/hostname, causing the incorrect hostname paths above. This commit fixes that by passing the appropriate autoconf cache variable value. Signed-off-by: Christopher McCrory <chrismcc@gmail.com> [Thomas: add commit log] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>