[NDS32] Remove all -mtlsdesc-trmpoline related things.

gcc/
	* config.gcc (with_nds32_lib, glibc):
	Remove TARGET_DEFAULT_TLSDESC_TRAMPOLINE=0 setting.
	* config/nds32/linux.h (TARGET_DEFAULT_TLSDESC_TRAMPOLINE): Delete.
	(NDS32_TLSDESC_TRAMPOLINE_SPEC): Delete.

From-SVN: r268508

gcc/ChangeLog

+2019-02-04  Chung-Ju Wu  <jasonwucj@gmail.com>
+
+	* config.gcc (with_nds32_lib, glibc):
+	Remove TARGET_DEFAULT_TLSDESC_TRAMPOLINE=0 setting.
+	* config/nds32/linux.h (TARGET_DEFAULT_TLSDESC_TRAMPOLINE): Delete.
+	(NDS32_TLSDESC_TRAMPOLINE_SPEC): Delete.
+
 2019-02-03  Uroš Bizjak  <ubizjak@gmail.com>
 
 	PR target/89071

gcc/config.gcc

@@ -4543,7 +4543,7 @@ case "${target}" in
 			;;
 		glibc)
 			# OK
-			tm_defines="${tm_defines} TARGET_DEFAULT_TLSDESC_TRAMPOLINE=0"
+			tm_defines="${tm_defines}"
 			;;
 		uclibc)
 			;;

gcc/config/nds32/linux.h

@@ -29,13 +29,6 @@
 #undef  PTRDIFF_TYPE
 #define PTRDIFF_TYPE "int"
 
-#ifdef TARGET_DEFAULT_TLSDESC_TRAMPOLINE
-  #define NDS32_TLSDESC_TRAMPOLINE_SPEC \
-    " %{!mno-tlsdesc-trampoline:--mtlsdesc-trampoline}"
-#else
-  #define NDS32_TLSDESC_TRAMPOLINE_SPEC ""
-#endif
-
 #define TARGET_OS_CPP_BUILTINS()                \
   do                                            \
     {                                           \
@@ -59,8 +52,7 @@
       %{rdynamic:-export-dynamic} \
       -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
     %{static:-static}}" \
-  NDS32_RELAX_SPEC \
-  NDS32_TLSDESC_TRAMPOLINE_SPEC
+  NDS32_RELAX_SPEC
 
 #define LINK_PIE_SPEC "%{pie:%{!fno-pie:%{!fno-PIE:%{!static:-pie}}}} "