Constify target_desc declarations

This patch changes various global target_desc declarations to const, thereby
correcting a prominent source of ODR violations in PowerPC-related target code.
The majority of files/changes are mechanical const-ifications accomplished by
regenerating the C files in features/.

This also required manually updating mips-linux-tdep.h,  s390-linux-tdep.h,
nios2-tdep.h, s390-tdep.h, arch/ppc-linux-tdesc.h, arch/ppc-linux-common.c,
and rs6000-tdep.c.

Patch tested against the sourceware trybot, and fully regression tested against
our (Red Hat's) internal  test infrastructure on Rawhide aarch64, s390x, x86_64,
and powerpcle.

With this patch, I can finally enable LTO in our GDB package builds. [Tested
with a rawhide scratch build containing this patch.]

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=22395
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=24835

70 files changed, 70 insertions, 69 deletions

diff --git a/gdb/features/Makefile b/gdb/features/Makefile
index 1f2b896..c3e0780 100644
--- a/gdb/features/Makefile
+++ b/gdb/features/Makefile
@@ -74,6 +74,7 @@ mips-dsp-expedite = r29,pc
 mips64-expedite = r29,pc
 mips64-dsp-expedite = r29,pc
 nios2-linux-expedite = sp,pc
+or1k-expedite = r1,npc
 powerpc-expedite = r1,pc
 s390-linux32-expedite = r14,r15,pswa
 s390-linux32v1-expedite = r14,r15,pswa
diff --git a/gdb/features/microblaze-with-stack-protect.c b/gdb/features/microblaze-with-stack-protect.c
index aa180bf..574dc02 100644
--- a/gdb/features/microblaze-with-stack-protect.c
+++ b/gdb/features/microblaze-with-stack-protect.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_microblaze_with_stack_protect;
+const struct target_desc *tdesc_microblaze_with_stack_protect;
 static void
 initialize_tdesc_microblaze_with_stack_protect (void)
 {
diff --git a/gdb/features/microblaze.c b/gdb/features/microblaze.c
index ef2c64c..8f1fb0a 100644
--- a/gdb/features/microblaze.c
+++ b/gdb/features/microblaze.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_microblaze;
+const struct target_desc *tdesc_microblaze;
 static void
 initialize_tdesc_microblaze (void)
 {
diff --git a/gdb/features/mips-dsp-linux.c b/gdb/features/mips-dsp-linux.c
index 76a9177..d9d928c 100644
--- a/gdb/features/mips-dsp-linux.c
+++ b/gdb/features/mips-dsp-linux.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_mips_dsp_linux;
+const struct target_desc *tdesc_mips_dsp_linux;
 static void
 initialize_tdesc_mips_dsp_linux (void)
 {
diff --git a/gdb/features/mips-linux.c b/gdb/features/mips-linux.c
index f97232c..8557bc8 100644
--- a/gdb/features/mips-linux.c
+++ b/gdb/features/mips-linux.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_mips_linux;
+const struct target_desc *tdesc_mips_linux;
 static void
 initialize_tdesc_mips_linux (void)
 {
diff --git a/gdb/features/mips64-dsp-linux.c b/gdb/features/mips64-dsp-linux.c
index 48d212a..80bbbcb 100644
--- a/gdb/features/mips64-dsp-linux.c
+++ b/gdb/features/mips64-dsp-linux.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_mips64_dsp_linux;
+const struct target_desc *tdesc_mips64_dsp_linux;
 static void
 initialize_tdesc_mips64_dsp_linux (void)
 {
diff --git a/gdb/features/mips64-linux.c b/gdb/features/mips64-linux.c
index 4b37d3d..21e8c37 100644
--- a/gdb/features/mips64-linux.c
+++ b/gdb/features/mips64-linux.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_mips64_linux;
+const struct target_desc *tdesc_mips64_linux;
 static void
 initialize_tdesc_mips64_linux (void)
 {
diff --git a/gdb/features/nds32.c b/gdb/features/nds32.c
index 4e52016..7a08d2c 100644
--- a/gdb/features/nds32.c
+++ b/gdb/features/nds32.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_nds32;
+const struct target_desc *tdesc_nds32;
 static void
 initialize_tdesc_nds32 (void)
 {
diff --git a/gdb/features/nios2.c b/gdb/features/nios2.c
index 6872aae..648f7ed 100644
--- a/gdb/features/nios2.c
+++ b/gdb/features/nios2.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_nios2;
+const struct target_desc *tdesc_nios2;
 static void
 initialize_tdesc_nios2 (void)
 {
diff --git a/gdb/features/or1k-linux.c b/gdb/features/or1k-linux.c
index e718d31..3eb6548 100644
--- a/gdb/features/or1k-linux.c
+++ b/gdb/features/or1k-linux.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_or1k_linux;
+const struct target_desc *tdesc_or1k_linux;
 static void
 initialize_tdesc_or1k_linux (void)
 {
diff --git a/gdb/features/or1k.c b/gdb/features/or1k.c
index c1fd26c..6704096 100644
--- a/gdb/features/or1k.c
+++ b/gdb/features/or1k.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_or1k;
+const struct target_desc *tdesc_or1k;
 static void
 initialize_tdesc_or1k (void)
 {
diff --git a/gdb/features/rs6000/powerpc-32.c b/gdb/features/rs6000/powerpc-32.c
index 4c766b7..a4f4bed 100644
--- a/gdb/features/rs6000/powerpc-32.c
+++ b/gdb/features/rs6000/powerpc-32.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_32;
+const struct target_desc *tdesc_powerpc_32;
 static void
 initialize_tdesc_powerpc_32 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-32l.c b/gdb/features/rs6000/powerpc-32l.c
index 34cba5d..f5893bf 100644
--- a/gdb/features/rs6000/powerpc-32l.c
+++ b/gdb/features/rs6000/powerpc-32l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_32l;
+const struct target_desc *tdesc_powerpc_32l;
 static void
 initialize_tdesc_powerpc_32l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-403.c b/gdb/features/rs6000/powerpc-403.c
index 1b16e08..2783287 100644
--- a/gdb/features/rs6000/powerpc-403.c
+++ b/gdb/features/rs6000/powerpc-403.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_403;
+const struct target_desc *tdesc_powerpc_403;
 static void
 initialize_tdesc_powerpc_403 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-403gc.c b/gdb/features/rs6000/powerpc-403gc.c
index 4ff844d..c69a134 100644
--- a/gdb/features/rs6000/powerpc-403gc.c
+++ b/gdb/features/rs6000/powerpc-403gc.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_403gc;
+const struct target_desc *tdesc_powerpc_403gc;
 static void
 initialize_tdesc_powerpc_403gc (void)
 {
diff --git a/gdb/features/rs6000/powerpc-405.c b/gdb/features/rs6000/powerpc-405.c
index 4c97aa5..1146d66 100644
--- a/gdb/features/rs6000/powerpc-405.c
+++ b/gdb/features/rs6000/powerpc-405.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_405;
+const struct target_desc *tdesc_powerpc_405;
 static void
 initialize_tdesc_powerpc_405 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-505.c b/gdb/features/rs6000/powerpc-505.c
index b9cae66..a36157f 100644
--- a/gdb/features/rs6000/powerpc-505.c
+++ b/gdb/features/rs6000/powerpc-505.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_505;
+const struct target_desc *tdesc_powerpc_505;
 static void
 initialize_tdesc_powerpc_505 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-601.c b/gdb/features/rs6000/powerpc-601.c
index ba35dc9..ceaf789 100644
--- a/gdb/features/rs6000/powerpc-601.c
+++ b/gdb/features/rs6000/powerpc-601.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_601;
+const struct target_desc *tdesc_powerpc_601;
 static void
 initialize_tdesc_powerpc_601 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-602.c b/gdb/features/rs6000/powerpc-602.c
index 7f69f44..eb85e69 100644
--- a/gdb/features/rs6000/powerpc-602.c
+++ b/gdb/features/rs6000/powerpc-602.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_602;
+const struct target_desc *tdesc_powerpc_602;
 static void
 initialize_tdesc_powerpc_602 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-603.c b/gdb/features/rs6000/powerpc-603.c
index 28c3628..223919c 100644
--- a/gdb/features/rs6000/powerpc-603.c
+++ b/gdb/features/rs6000/powerpc-603.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_603;
+const struct target_desc *tdesc_powerpc_603;
 static void
 initialize_tdesc_powerpc_603 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-604.c b/gdb/features/rs6000/powerpc-604.c
index fe0fe2f..09cbb50 100644
--- a/gdb/features/rs6000/powerpc-604.c
+++ b/gdb/features/rs6000/powerpc-604.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_604;
+const struct target_desc *tdesc_powerpc_604;
 static void
 initialize_tdesc_powerpc_604 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-64.c b/gdb/features/rs6000/powerpc-64.c
index d0688ee..43dee10 100644
--- a/gdb/features/rs6000/powerpc-64.c
+++ b/gdb/features/rs6000/powerpc-64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_64;
+const struct target_desc *tdesc_powerpc_64;
 static void
 initialize_tdesc_powerpc_64 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-64l.c b/gdb/features/rs6000/powerpc-64l.c
index 465c023..83a6a15 100644
--- a/gdb/features/rs6000/powerpc-64l.c
+++ b/gdb/features/rs6000/powerpc-64l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_64l;
+const struct target_desc *tdesc_powerpc_64l;
 static void
 initialize_tdesc_powerpc_64l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-7400.c b/gdb/features/rs6000/powerpc-7400.c
index 0e71dd7..d5fbf4b 100644
--- a/gdb/features/rs6000/powerpc-7400.c
+++ b/gdb/features/rs6000/powerpc-7400.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_7400;
+const struct target_desc *tdesc_powerpc_7400;
 static void
 initialize_tdesc_powerpc_7400 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-750.c b/gdb/features/rs6000/powerpc-750.c
index 396ec45..60a7b41 100644
--- a/gdb/features/rs6000/powerpc-750.c
+++ b/gdb/features/rs6000/powerpc-750.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_750;
+const struct target_desc *tdesc_powerpc_750;
 static void
 initialize_tdesc_powerpc_750 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-860.c b/gdb/features/rs6000/powerpc-860.c
index 328ad19..3e9a25f 100644
--- a/gdb/features/rs6000/powerpc-860.c
+++ b/gdb/features/rs6000/powerpc-860.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_860;
+const struct target_desc *tdesc_powerpc_860;
 static void
 initialize_tdesc_powerpc_860 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-altivec32.c b/gdb/features/rs6000/powerpc-altivec32.c
index 743ca06..41cca72 100644
--- a/gdb/features/rs6000/powerpc-altivec32.c
+++ b/gdb/features/rs6000/powerpc-altivec32.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_altivec32;
+const struct target_desc *tdesc_powerpc_altivec32;
 static void
 initialize_tdesc_powerpc_altivec32 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-altivec32l.c b/gdb/features/rs6000/powerpc-altivec32l.c
index a19016b..9cd9355 100644
--- a/gdb/features/rs6000/powerpc-altivec32l.c
+++ b/gdb/features/rs6000/powerpc-altivec32l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_altivec32l;
+const struct target_desc *tdesc_powerpc_altivec32l;
 static void
 initialize_tdesc_powerpc_altivec32l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-altivec64.c b/gdb/features/rs6000/powerpc-altivec64.c
index b8a157b..8422708 100644
--- a/gdb/features/rs6000/powerpc-altivec64.c
+++ b/gdb/features/rs6000/powerpc-altivec64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_altivec64;
+const struct target_desc *tdesc_powerpc_altivec64;
 static void
 initialize_tdesc_powerpc_altivec64 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-altivec64l.c b/gdb/features/rs6000/powerpc-altivec64l.c
index 1846d06..977af8c 100644
--- a/gdb/features/rs6000/powerpc-altivec64l.c
+++ b/gdb/features/rs6000/powerpc-altivec64l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_altivec64l;
+const struct target_desc *tdesc_powerpc_altivec64l;
 static void
 initialize_tdesc_powerpc_altivec64l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-e500.c b/gdb/features/rs6000/powerpc-e500.c
index bf62405..84f721d 100644
--- a/gdb/features/rs6000/powerpc-e500.c
+++ b/gdb/features/rs6000/powerpc-e500.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_e500;
+const struct target_desc *tdesc_powerpc_e500;
 static void
 initialize_tdesc_powerpc_e500 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-e500l.c b/gdb/features/rs6000/powerpc-e500l.c
index 8199989..a1e133d 100644
--- a/gdb/features/rs6000/powerpc-e500l.c
+++ b/gdb/features/rs6000/powerpc-e500l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_e500l;
+const struct target_desc *tdesc_powerpc_e500l;
 static void
 initialize_tdesc_powerpc_e500l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa205-32l.c b/gdb/features/rs6000/powerpc-isa205-32l.c
index 7791fa7..57fb20a 100644
--- a/gdb/features/rs6000/powerpc-isa205-32l.c
+++ b/gdb/features/rs6000/powerpc-isa205-32l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa205_32l;
+const struct target_desc *tdesc_powerpc_isa205_32l;
 static void
 initialize_tdesc_powerpc_isa205_32l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa205-64l.c b/gdb/features/rs6000/powerpc-isa205-64l.c
index fb05df7..b9ce8e6 100644
--- a/gdb/features/rs6000/powerpc-isa205-64l.c
+++ b/gdb/features/rs6000/powerpc-isa205-64l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa205_64l;
+const struct target_desc *tdesc_powerpc_isa205_64l;
 static void
 initialize_tdesc_powerpc_isa205_64l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa205-altivec32l.c b/gdb/features/rs6000/powerpc-isa205-altivec32l.c
index a510931..54b914c 100644
--- a/gdb/features/rs6000/powerpc-isa205-altivec32l.c
+++ b/gdb/features/rs6000/powerpc-isa205-altivec32l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa205_altivec32l;
+const struct target_desc *tdesc_powerpc_isa205_altivec32l;
 static void
 initialize_tdesc_powerpc_isa205_altivec32l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa205-altivec64l.c b/gdb/features/rs6000/powerpc-isa205-altivec64l.c
index f91c2e8..42e6f03 100644
--- a/gdb/features/rs6000/powerpc-isa205-altivec64l.c
+++ b/gdb/features/rs6000/powerpc-isa205-altivec64l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa205_altivec64l;
+const struct target_desc *tdesc_powerpc_isa205_altivec64l;
 static void
 initialize_tdesc_powerpc_isa205_altivec64l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa205-ppr-dscr-vsx32l.c b/gdb/features/rs6000/powerpc-isa205-ppr-dscr-vsx32l.c
index 28a7c3b..a2c6172 100644
--- a/gdb/features/rs6000/powerpc-isa205-ppr-dscr-vsx32l.c
+++ b/gdb/features/rs6000/powerpc-isa205-ppr-dscr-vsx32l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa205_ppr_dscr_vsx32l;
+const struct target_desc *tdesc_powerpc_isa205_ppr_dscr_vsx32l;
 static void
 initialize_tdesc_powerpc_isa205_ppr_dscr_vsx32l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa205-ppr-dscr-vsx64l.c b/gdb/features/rs6000/powerpc-isa205-ppr-dscr-vsx64l.c
index d34a197..3e7915a 100644
--- a/gdb/features/rs6000/powerpc-isa205-ppr-dscr-vsx64l.c
+++ b/gdb/features/rs6000/powerpc-isa205-ppr-dscr-vsx64l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa205_ppr_dscr_vsx64l;
+const struct target_desc *tdesc_powerpc_isa205_ppr_dscr_vsx64l;
 static void
 initialize_tdesc_powerpc_isa205_ppr_dscr_vsx64l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa205-vsx32l.c b/gdb/features/rs6000/powerpc-isa205-vsx32l.c
index 7639155..4cefcc3 100644
--- a/gdb/features/rs6000/powerpc-isa205-vsx32l.c
+++ b/gdb/features/rs6000/powerpc-isa205-vsx32l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa205_vsx32l;
+const struct target_desc *tdesc_powerpc_isa205_vsx32l;
 static void
 initialize_tdesc_powerpc_isa205_vsx32l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa205-vsx64l.c b/gdb/features/rs6000/powerpc-isa205-vsx64l.c
index fad4227..2fb151d 100644
--- a/gdb/features/rs6000/powerpc-isa205-vsx64l.c
+++ b/gdb/features/rs6000/powerpc-isa205-vsx64l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa205_vsx64l;
+const struct target_desc *tdesc_powerpc_isa205_vsx64l;
 static void
 initialize_tdesc_powerpc_isa205_vsx64l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa207-htm-vsx32l.c b/gdb/features/rs6000/powerpc-isa207-htm-vsx32l.c
index 78f2047..b945039 100644
--- a/gdb/features/rs6000/powerpc-isa207-htm-vsx32l.c
+++ b/gdb/features/rs6000/powerpc-isa207-htm-vsx32l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa207_htm_vsx32l;
+const struct target_desc *tdesc_powerpc_isa207_htm_vsx32l;
 static void
 initialize_tdesc_powerpc_isa207_htm_vsx32l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa207-htm-vsx64l.c b/gdb/features/rs6000/powerpc-isa207-htm-vsx64l.c
index 5517201..3aa579f 100644
--- a/gdb/features/rs6000/powerpc-isa207-htm-vsx64l.c
+++ b/gdb/features/rs6000/powerpc-isa207-htm-vsx64l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa207_htm_vsx64l;
+const struct target_desc *tdesc_powerpc_isa207_htm_vsx64l;
 static void
 initialize_tdesc_powerpc_isa207_htm_vsx64l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa207-vsx32l.c b/gdb/features/rs6000/powerpc-isa207-vsx32l.c
index 7fc15bf..e5ce7f9 100644
--- a/gdb/features/rs6000/powerpc-isa207-vsx32l.c
+++ b/gdb/features/rs6000/powerpc-isa207-vsx32l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa207_vsx32l;
+const struct target_desc *tdesc_powerpc_isa207_vsx32l;
 static void
 initialize_tdesc_powerpc_isa207_vsx32l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-isa207-vsx64l.c b/gdb/features/rs6000/powerpc-isa207-vsx64l.c
index 3ad55f7..adf6d3e 100644
--- a/gdb/features/rs6000/powerpc-isa207-vsx64l.c
+++ b/gdb/features/rs6000/powerpc-isa207-vsx64l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_isa207_vsx64l;
+const struct target_desc *tdesc_powerpc_isa207_vsx64l;
 static void
 initialize_tdesc_powerpc_isa207_vsx64l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-vsx32.c b/gdb/features/rs6000/powerpc-vsx32.c
index d7278d9..6fccdb3 100644
--- a/gdb/features/rs6000/powerpc-vsx32.c
+++ b/gdb/features/rs6000/powerpc-vsx32.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_vsx32;
+const struct target_desc *tdesc_powerpc_vsx32;
 static void
 initialize_tdesc_powerpc_vsx32 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-vsx32l.c b/gdb/features/rs6000/powerpc-vsx32l.c
index 7097ffa..1efe880 100644
--- a/gdb/features/rs6000/powerpc-vsx32l.c
+++ b/gdb/features/rs6000/powerpc-vsx32l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_vsx32l;
+const struct target_desc *tdesc_powerpc_vsx32l;
 static void
 initialize_tdesc_powerpc_vsx32l (void)
 {
diff --git a/gdb/features/rs6000/powerpc-vsx64.c b/gdb/features/rs6000/powerpc-vsx64.c
index 7e90559..df6d0f4 100644
--- a/gdb/features/rs6000/powerpc-vsx64.c
+++ b/gdb/features/rs6000/powerpc-vsx64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_vsx64;
+const struct target_desc *tdesc_powerpc_vsx64;
 static void
 initialize_tdesc_powerpc_vsx64 (void)
 {
diff --git a/gdb/features/rs6000/powerpc-vsx64l.c b/gdb/features/rs6000/powerpc-vsx64l.c
index 4affa35..89aa13d 100644
--- a/gdb/features/rs6000/powerpc-vsx64l.c
+++ b/gdb/features/rs6000/powerpc-vsx64l.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_powerpc_vsx64l;
+const struct target_desc *tdesc_powerpc_vsx64l;
 static void
 initialize_tdesc_powerpc_vsx64l (void)
 {
diff --git a/gdb/features/rs6000/rs6000.c b/gdb/features/rs6000/rs6000.c
index 826d9ad..4aa5a87 100644
--- a/gdb/features/rs6000/rs6000.c
+++ b/gdb/features/rs6000/rs6000.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_rs6000;
+const struct target_desc *tdesc_rs6000;
 static void
 initialize_tdesc_rs6000 (void)
 {
diff --git a/gdb/features/rx.c b/gdb/features/rx.c
index dd765c2..825a4ac 100644
--- a/gdb/features/rx.c
+++ b/gdb/features/rx.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_rx;
+const struct target_desc *tdesc_rx;
 static void
 initialize_tdesc_rx (void)
 {
diff --git a/gdb/features/s390-gs-linux64.c b/gdb/features/s390-gs-linux64.c
index 331b6e2..d48f831 100644
--- a/gdb/features/s390-gs-linux64.c
+++ b/gdb/features/s390-gs-linux64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390_gs_linux64;
+const struct target_desc *tdesc_s390_gs_linux64;
 static void
 initialize_tdesc_s390_gs_linux64 (void)
 {
diff --git a/gdb/features/s390-linux32.c b/gdb/features/s390-linux32.c
index 18b0d0f..03ec11a 100644
--- a/gdb/features/s390-linux32.c
+++ b/gdb/features/s390-linux32.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390_linux32;
+const struct target_desc *tdesc_s390_linux32;
 static void
 initialize_tdesc_s390_linux32 (void)
 {
diff --git a/gdb/features/s390-linux32v1.c b/gdb/features/s390-linux32v1.c
index d1180f9..65de6f2 100644
--- a/gdb/features/s390-linux32v1.c
+++ b/gdb/features/s390-linux32v1.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390_linux32v1;
+const struct target_desc *tdesc_s390_linux32v1;
 static void
 initialize_tdesc_s390_linux32v1 (void)
 {
diff --git a/gdb/features/s390-linux32v2.c b/gdb/features/s390-linux32v2.c
index d1da31a..0e3e04d 100644
--- a/gdb/features/s390-linux32v2.c
+++ b/gdb/features/s390-linux32v2.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390_linux32v2;
+const struct target_desc *tdesc_s390_linux32v2;
 static void
 initialize_tdesc_s390_linux32v2 (void)
 {
diff --git a/gdb/features/s390-linux64.c b/gdb/features/s390-linux64.c
index 235da0f..f0ec919 100644
--- a/gdb/features/s390-linux64.c
+++ b/gdb/features/s390-linux64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390_linux64;
+const struct target_desc *tdesc_s390_linux64;
 static void
 initialize_tdesc_s390_linux64 (void)
 {
diff --git a/gdb/features/s390-linux64v1.c b/gdb/features/s390-linux64v1.c
index 108c0ef..9a360c7 100644
--- a/gdb/features/s390-linux64v1.c
+++ b/gdb/features/s390-linux64v1.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390_linux64v1;
+const struct target_desc *tdesc_s390_linux64v1;
 static void
 initialize_tdesc_s390_linux64v1 (void)
 {
diff --git a/gdb/features/s390-linux64v2.c b/gdb/features/s390-linux64v2.c
index 057a129..18bc6ed 100644
--- a/gdb/features/s390-linux64v2.c
+++ b/gdb/features/s390-linux64v2.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390_linux64v2;
+const struct target_desc *tdesc_s390_linux64v2;
 static void
 initialize_tdesc_s390_linux64v2 (void)
 {
diff --git a/gdb/features/s390-te-linux64.c b/gdb/features/s390-te-linux64.c
index f8f2217..a8909b3 100644
--- a/gdb/features/s390-te-linux64.c
+++ b/gdb/features/s390-te-linux64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390_te_linux64;
+const struct target_desc *tdesc_s390_te_linux64;
 static void
 initialize_tdesc_s390_te_linux64 (void)
 {
diff --git a/gdb/features/s390-tevx-linux64.c b/gdb/features/s390-tevx-linux64.c
index cbc2077..8f8aec6 100644
--- a/gdb/features/s390-tevx-linux64.c
+++ b/gdb/features/s390-tevx-linux64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390_tevx_linux64;
+const struct target_desc *tdesc_s390_tevx_linux64;
 static void
 initialize_tdesc_s390_tevx_linux64 (void)
 {
diff --git a/gdb/features/s390-vx-linux64.c b/gdb/features/s390-vx-linux64.c
index 779332c..0bcc14d 100644
--- a/gdb/features/s390-vx-linux64.c
+++ b/gdb/features/s390-vx-linux64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390_vx_linux64;
+const struct target_desc *tdesc_s390_vx_linux64;
 static void
 initialize_tdesc_s390_vx_linux64 (void)
 {
diff --git a/gdb/features/s390x-gs-linux64.c b/gdb/features/s390x-gs-linux64.c
index a779daf..074c38d 100644
--- a/gdb/features/s390x-gs-linux64.c
+++ b/gdb/features/s390x-gs-linux64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390x_gs_linux64;
+const struct target_desc *tdesc_s390x_gs_linux64;
 static void
 initialize_tdesc_s390x_gs_linux64 (void)
 {
diff --git a/gdb/features/s390x-linux64.c b/gdb/features/s390x-linux64.c
index f8097e9..af5ba23 100644
--- a/gdb/features/s390x-linux64.c
+++ b/gdb/features/s390x-linux64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390x_linux64;
+const struct target_desc *tdesc_s390x_linux64;
 static void
 initialize_tdesc_s390x_linux64 (void)
 {
diff --git a/gdb/features/s390x-linux64v1.c b/gdb/features/s390x-linux64v1.c
index c79ee40..a33bdc1 100644
--- a/gdb/features/s390x-linux64v1.c
+++ b/gdb/features/s390x-linux64v1.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390x_linux64v1;
+const struct target_desc *tdesc_s390x_linux64v1;
 static void
 initialize_tdesc_s390x_linux64v1 (void)
 {
diff --git a/gdb/features/s390x-linux64v2.c b/gdb/features/s390x-linux64v2.c
index 9500917..8b906a4 100644
--- a/gdb/features/s390x-linux64v2.c
+++ b/gdb/features/s390x-linux64v2.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390x_linux64v2;
+const struct target_desc *tdesc_s390x_linux64v2;
 static void
 initialize_tdesc_s390x_linux64v2 (void)
 {
diff --git a/gdb/features/s390x-te-linux64.c b/gdb/features/s390x-te-linux64.c
index 64a0fe5..de8bf61 100644
--- a/gdb/features/s390x-te-linux64.c
+++ b/gdb/features/s390x-te-linux64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390x_te_linux64;
+const struct target_desc *tdesc_s390x_te_linux64;
 static void
 initialize_tdesc_s390x_te_linux64 (void)
 {
diff --git a/gdb/features/s390x-tevx-linux64.c b/gdb/features/s390x-tevx-linux64.c
index ec68e70..8bd5cc6 100644
--- a/gdb/features/s390x-tevx-linux64.c
+++ b/gdb/features/s390x-tevx-linux64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390x_tevx_linux64;
+const struct target_desc *tdesc_s390x_tevx_linux64;
 static void
 initialize_tdesc_s390x_tevx_linux64 (void)
 {
diff --git a/gdb/features/s390x-vx-linux64.c b/gdb/features/s390x-vx-linux64.c
index 4362e53..f450c45 100644
--- a/gdb/features/s390x-vx-linux64.c
+++ b/gdb/features/s390x-vx-linux64.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_s390x_vx_linux64;
+const struct target_desc *tdesc_s390x_vx_linux64;
 static void
 initialize_tdesc_s390x_vx_linux64 (void)
 {
diff --git a/gdb/features/sparc/sparc32-solaris.c b/gdb/features/sparc/sparc32-solaris.c
index c2f1606..3353d4f 100644
--- a/gdb/features/sparc/sparc32-solaris.c
+++ b/gdb/features/sparc/sparc32-solaris.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_sparc32_solaris;
+const struct target_desc *tdesc_sparc32_solaris;
 static void
 initialize_tdesc_sparc32_solaris (void)
 {
diff --git a/gdb/features/sparc/sparc64-solaris.c b/gdb/features/sparc/sparc64-solaris.c
index bb8f685..1150c88 100644
--- a/gdb/features/sparc/sparc64-solaris.c
+++ b/gdb/features/sparc/sparc64-solaris.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_sparc64_solaris;
+const struct target_desc *tdesc_sparc64_solaris;
 static void
 initialize_tdesc_sparc64_solaris (void)
 {
diff --git a/gdb/features/z80.c b/gdb/features/z80.c
index 944b563..f8e2a19 100644
--- a/gdb/features/z80.c
+++ b/gdb/features/z80.c
@@ -5,7 +5,7 @@
 #include "osabi.h"
 #include "target-descriptions.h"
 
-struct target_desc *tdesc_z80;
+const struct target_desc *tdesc_z80;
 static void
 initialize_tdesc_z80 (void)
 {