Hello, I was investigating the recent build failures of the libbluray package in Buildroot, which occur on the Microblaze, Blackfin and m68k architecture (at least), using the latest uClibc-ng release. The failure looks like this: http://autobuild.buildroot.net/results/941/941c06e29f6542e258f20799dc6f3f94… Relevant part: In file included from /home/buildroot/autobuild/run/instance-3/output/host/usr/microblazeel-buildroot-linux-uclibc/sysroot/usr/include/pthread.h:686:0, from src/util/mutex.c:32: /home/buildroot/autobuild/run/instance-3/output/host/usr/microblazeel-buildroot-linux-uclibc/sysroot/usr/include/bits/sigthread.h:31:14: error: unknown type name '__sigset_t' const __sigset_t *__restrict __newmask, ^ /home/buildroot/autobuild/run/instance-3/output/host/usr/microblazeel-buildroot-linux-uclibc/sysroot/usr/include/bits/sigthread.h:32:8: error: unknown type name '__sigset_t' __sigset_t *__restrict __oldmask)__THROW; And indeed, one can reproduce this problem with a very simple test case: ==== #include <pthread.h> int main(void) { return 0; } ==== If you build it with the Microblaze/uClibc compiler with no special flags, it works just fine: $ ./output/host/usr/bin/microblazeel-linux-gcc -o test test.c $ However, as soon as you start adding the -std=c99 flag, the build fails: $ ./output/host/usr/bin/microblazeel-linux-gcc -std=c99 -o test test.c In file included from /home/thomas/projets/buildroot/output/host/usr/microblazeel-buildroot-linux-uclibc/sysroot/usr/include/pthread.h:686:0, from pouet.c:1: /home/thomas/projets/buildroot/output/host/usr/microblazeel-buildroot-linux-uclibc/sysroot/usr/include/bits/sigthread.h:31:14: error: unknown type name ‘__sigset_t’ const __sigset_t *__restrict __newmask, ^ /home/thomas/projets/buildroot/output/host/usr/microblazeel-buildroot-linux-uclibc/sysroot/usr/include/bits/sigthread.h:32:8: error: unknown type name ‘__sigset_t’ __sigset_t *__restrict __oldmask)__THROW; ^ Is this problem already known? Best regards, Thomas Petazzoni -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com