Bug#28690 mysql-enterprise-gpl-5.0.40-linux-i686-glibc won't start on Debian Sarge
- Only use the "hack for bug in NTPL" if using NTPL, by dynamically checking the thd_lib_detected flag mysys/my_thr_init.c: Only start the "dummy thread hack for bug in NPTL" - if using NPTL. If the system uses LinuxThreads it's not needed, it actually causes the "pthread manager" to be started as root and thus all subsequent threads will also run as root although mysqld drops root privileges, this in turns causes mysqld to deadlock since the mysqlds main thread running as <user> can't send signals to a process owned by root.
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