Add ATF tests for __sync_* functions instead of all_sync_ops_linkable.c

branches: 1.7.12;
GC more gcc 4.8 specific (dead) logic

branches: 1.6.2; 1.6.4;
Explicitly link C++ test case with CXX.

Fix include order, so the makefile actually does something again.

Do not try the C++ 2011 test with gcc < 4.8

Disable the <atomic> C++11 test for now, we are not ready for it.

Add a link time test to catch missing symbols in libc, as pointed
out in PR toolchain/49074.

branches: 1.1.4; 1.1.8;
Add a link-time test for __sync_* primitives (see PR 48368) - this
will allow us to notice missing functions during the build, instead
of when compiling arbitrary pkgsrc stuff later.

Add ATF tests for __sync_* functions instead of all_sync_ops_linkable.c

branches: 1.4.4; 1.4.8; 1.4.30;
Remove excemption for i386 (PR lib/48601) - missing aliases will be
added to the C code.

For now excempt i386 from __sync_lock_test_and_set_8 and point to
PR lib/48601. Probably more architectures to follow.

Since clang doesn't recognize the nand variants of the sync builtins and
gcc doesn't support __has_builtin, use a plain #ifndef __clang__ check
as workaround.

Add a link-time test for __sync_* primitives (see PR 48368) - this
will allow us to notice missing functions during the build, instead
of when compiling arbitrary pkgsrc stuff later.

Remove LLVM atomic hacks for Sparc.

branches: 1.4.2;
When building the atomic op test on SPARC64 with Clang, skip the
sub-32bit tests for now. Clang currently doesn't synthesize a CAS
replacement nor does it create a libcall.

If we don't have 64 bit atomic ops, also do not test "long long" and intmax_t
(and friends).

If not __HAVE_ATOMIC64_OPS, do not force the test for 64bit types.

Add a link time test to catch missing symbols in libc, as pointed
out in PR toolchain/49074.