Thread local storage issue

[Floyd Brown]

Using 2019.11 and I having issues with mkfs.ext4 (mke2fs) with a segfault
in libuuid, more specifically lib/randutils.c:67:
...
#ifdef DO_JRAND_MIX
        ul_jrand_seed[0] = getpid() ^ (tv.tv_sec & 0xFFFF);
...

ul_jrand_seed is defined as follows:

#ifdef HAVE_TLS
#define THREAD_LOCAL static __thread
#else
#define THREAD_LOCAL static
#endif

#if defined(__linux__) && defined(__NR_gettid) && defined(HAVE_JRAND48)
#define DO_JRAND_MIX
THREAD_LOCAL unsigned short ul_jrand_seed[3];
#endif


When attempting to store the result  in the ul_jrand_seed[0], we get a
segfault. Using GDB, i attempted to look at the variable address which is
reported as invalid.

I have NTPL enabled in my busybox build but ---?

What am I missing? I undefined the THREAD_LOCAL define for the variable and
it works.

Any Idea what I am missing?



Thanks

Floyd Brown
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