Add hidden_tls_def macros, fix powerpc-soft build with GCC 9.

Soft-float powerpc fails to build with current GCC mainline because of
use of libc_hidden_data_def for TLS variables, resulting in a non-TLS
alias being defined, to which the tls_model attribute is now copied,
resulting in a warning about it being ignored.

The problem here appears to be the non-TLS alias.  This patch adds a
hidden_tls_def macro family, corresponding to the hidden_tls_proto
macros, to define TLS aliases properly in such a case, and uses it for
those powerpc soft-float variables.

Tested with build-many-glibcs.py compilers build for powerpc-linux-gnu
soft-float.  Also tested for x86_64.

	* include/libc-symbols.h [SHARED && !NO_HIDDEN && !__ASSEMBLER__]
	(__hidden_ver2): New macro.  Use old definition of __hidden_ver1
	with additional parameter thread.
	[SHARED && !NO_HIDDEN && !__ASSEMBLER__] (__hidden_ver1): Define
	in terms of __hidden_ver2.
	(hidden_tls_def): New macro.
	(libc_hidden_tls_def): Likewise.
	(rtld_hidden_tls_def): Likewise.
	(libm_hidden_tls_def): Likewise.
	(libmvec_hidden_tls_def): Likewise.
	(libresolv_hidden_tls_def): Likewise.
	(librt_hidden_tls_def): Likewise.
	(libdl_hidden_tls_def): Likewise.
	(libnss_files_hidden_tls_def): Likewise.
	(libnsl_hidden_tls_def): Likewise.
	(libnss_nisplus_hidden_tls_def): Likewise.
	(libutil_hidden_tls_def): Likewise.
	(libutil_hidden_tls_def): Likweise.
	* sysdeps/powerpc/nofpu/sim-full.c (__sim_exceptions_thread): Use
	libc_hidden_tls_def.
	(__sim_disabled_exceptions_thread): Likewise.
	(__sim_round_mode_thread): Likewise.

1 files changed, 3 insertions, 3 deletions

diff --git a/sysdeps/powerpc/nofpu/sim-full.c b/sysdeps/powerpc/nofpu/sim-full.c
index 223bf488f2..f18ebad064 100644
--- a/sysdeps/powerpc/nofpu/sim-full.c
+++ b/sysdeps/powerpc/nofpu/sim-full.c
@@ -23,14 +23,14 @@
 
 /* Thread-local to store sticky exceptions.  */
 __thread int __sim_exceptions_thread __attribute__ ((nocommon));
-libc_hidden_data_def (__sim_exceptions_thread);
+libc_hidden_tls_def (__sim_exceptions_thread);
 
 /* By default, no exceptions should trap.  */
 __thread int __sim_disabled_exceptions_thread = 0xffffffff;
-libc_hidden_data_def (__sim_disabled_exceptions_thread);
+libc_hidden_tls_def (__sim_disabled_exceptions_thread);
 
 __thread int __sim_round_mode_thread __attribute__ ((nocommon));
-libc_hidden_data_def (__sim_round_mode_thread);
+libc_hidden_tls_def (__sim_round_mode_thread);
 
 #if SIM_GLOBAL_COMPAT
 int __sim_exceptions_global __attribute__ ((nocommon));