fix build on clang plus -DPERL_GLOBAL_STRUCT

The various PERL_TSA_* macros that utilise clang Thread Safety Analysis
were failing on  -DPERL_GLOBAL_STRUCT and -DPERL_GLOBAL_STRUCT_PRIVATE
builds, due to lines like these:

    Perl_op_refcnt_lock(pTHX)
      PERL_TSA_ACQUIRE(PL_op_mutex)
    {
        ...
    }

where under DPERL_GLOBAL_STRUCT globals vars aren't really global,
so you can't pass PL_op_mutex as an arg to that function attribute.

The simplest fix (since you can't just bung a dVAR in there) is to just
disable TSA on PERL_GLOBAL_STRUCT builds.

1 files changed, 2 insertions, 0 deletions

diff --git a/perl.h b/perl.h
index dddf97d518..f110c2b606 100644
--- a/perl.h
+++ b/perl.h
@@ -3065,6 +3065,8 @@ freeing any remaining Perl interpreters.
  */
 #if defined(USE_ITHREADS) && defined(I_PTHREAD) && \
     defined(__clang__) && \
+    !defined(PERL_GLOBAL_STRUCT) && \
+    !defined(PERL_GLOBAL_STRUCT_PRIVATE) && \
     !defined(SWIG) && \
   ((!defined(__apple_build_version__) &&               \
     ((__clang_major__ == 3 && __clang_minor__ >= 6) || \