[PATCH] or1k: Only define TARGET_HAVE_TLS when HAVE_AS_TLS

[Stafford Horne <shorne@gmail.com>]

This was found when testing buildroot with linuxthreads enabled.  In
this case, the build passes --disable-tls to the toolchain during
configuration.  After building the OpenRISC toolchain it was still
generating TLS code sequences and causing linker failures such as:

 ..../or1k-buildroot-linux-uclibc-gcc -o gpsd-3.24/gpsctl .... -lusb-1.0 -lm -lrt -lnsl
 ..../ld: ..../sysroot/usr/lib/libusb-1.0.so: undefined reference to `__tls_get_addr'

This patch fixes this by disabling tls for the OpenRISC target when requested
via --disable-tls.

Tested-by: Yann E. MORIN <yann.morin@orange.com>

gcc/ChangeLog:

	* config/or1k/or1k.cc (TARGET_HAVE_TLS): Only define if
	HAVE_AS_TLS is defined.
---
 gcc/config/or1k/or1k.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gcc/config/or1k/or1k.cc b/gcc/config/or1k/or1k.cc
index da2f59062ba..0ce7b234417 100644
--- a/gcc/config/or1k/or1k.cc
+++ b/gcc/config/or1k/or1k.cc
@@ -2206,8 +2206,10 @@ or1k_output_mi_thunk (FILE *file, tree thunk_fndecl,
 #undef  TARGET_LEGITIMATE_ADDRESS_P
 #define TARGET_LEGITIMATE_ADDRESS_P or1k_legitimate_address_p
 
+#ifdef HAVE_AS_TLS
 #undef  TARGET_HAVE_TLS
 #define TARGET_HAVE_TLS true
+#endif
 
 #undef  TARGET_HAVE_SPECULATION_SAFE_VALUE
 #define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed
-- 
2.37.2