Remove unused code that's confusing when using cscope/opengrok.

branches: 1.5.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.4.32;
fix typo in previous.

Don't use FP instructions when building for m68010. Fixes broken sun2 build.
G/C some unused code.

Merge the nathanw_sa branch.

branches: 1.1.2;
file _context_u.S was initially added on branch nathanw_sa.

Remove unused code that's confusing when using cscope/opengrok.

branches: 1.7.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.6.12;
Remove the PTHREAD_SA option. If M:N threads is reimplemented it's
better off done with a seperate library.

Remove possible race condition in upcall recycling.

Adapt to structure name changes.

Remove PT_SLEEPUC and add PT_TRAPUC.

Merge the nathanw_sa branch.

branches: 1.1.2;
file genassym.cf was initially added on branch nathanw_sa.

This is not needed anymore.

SA_SIGINFO support for m68k (libpthread)

need <string.h>

add __RCSID()

Merge the nathanw_sa branch.

branches: 1.1.2;
file pthread_md.c was initially added on branch nathanw_sa.

make pthread__sp unsigned long.

branches: 1.7.2;
Remove unused code that's confusing when using cscope/opengrok.

branches: 1.6.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.5.4;
- Remove libpthread's atomic ops.
- Remove the old spinlock-based mutex and rwlock implementations.
- Use the atomic ops from libc.

branches: 1.4.12;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

m68k does not sigcontext<->mcontext anymore.

Merge the nathanw_sa branch.

branches: 1.1.2;
file pthread_md.h was initially added on branch nathanw_sa.

Remove the PTHREAD_SA option. If M:N threads is reimplemented it's
better off done with a seperate library.

s/the the/the/ (only in sources that aren't regularly imported from
elsewhere).

fix pt_trapuc handling errors:
- movl to address register doesn't set flags (add explicit test)
- clr only clears a word (use clrl)

Remove possible race condition in upcall recycling.

Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc
and use it preferentially to a value in pt_uc, clearing it once on the new
stack. Move stores into pt_uc back to before the stack switch; storing
after the stack switch opened a one-instruction race condition where an upcall
that had just started a chain could be preempted again, and would bomb when
restarted due to its pt_uc not yet having been updated. Now that pt_trapuc
is what the upcall code writes to, it is safe to store to pt_uc before
switching stacks.

Remove obsolete pt_sleepuc code.

Apply Nathan's switch-away fix and previous save-PT_UC from new stack fix.
Compile-tested only.

Merge the nathanw_sa branch.

branches: 1.1.2;
file pthread_switch.S was initially added on branch nathanw_sa.