gdbstub: Generate a single gdbstub-xml.c / gdb_static_features[]

gdb_static_features[] does not depend on target-specific code.
Instead of generating one file per target, generate a single file
with a single gdb_static_features[] array.

Co-developed-by: Chao Liu <chao.liu.zevorn@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Chao Liu <chao.liu.zevorn@gmail.com>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Link: https://lore.kernel.org/qemu-devel/20260310232045.58440-17-philmd@linaro.org
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>

gdbstub/meson.build

@@ -4,6 +4,29 @@
 # types such as hwaddr.
 #
 
+gdbstub_xml_files = []
+foreach target : target_dirs
+  config_target = config_target_mak[target]
+  if 'TARGET_XML_FILES' in config_target
+    foreach gdbstub_xml : config_target['TARGET_XML_FILES'].split()
+      if not gdbstub_xml_files.contains('gdb-xml/' + gdbstub_xml)
+        gdbstub_xml_files += 'gdb-xml/' + gdbstub_xml
+      endif
+    endforeach
+  endif
+endforeach
+if gdbstub_xml_files.length() > 0
+  feature_to_c = find_program('../scripts/feature_to_c.py')
+  gdbstub_xml = custom_target('gdbstub-xml.c',
+                              output: 'gdbstub-xml.c',
+                              input: files(gdbstub_xml_files),
+                              command: [feature_to_c, '@INPUT@'],
+                              capture: true)
+else
+  gdbstub_xml = files('gdb-xml-stub.c')
+endif
+common_ss.add(gdbstub_xml)
+
 # We build two versions of gdbstub, one for each mode
 user_ss.add(files(
   'gdbstub.c',

meson.build

@@ -4248,7 +4248,6 @@ if have_rust
 endif
 
 
-feature_to_c = find_program('scripts/feature_to_c.py')
 rust_root_crate = find_program('scripts/rust/rust_root_crate.sh')
 
 if host_os == 'darwin'
@@ -4328,19 +4327,6 @@ foreach target : target_dirs
     endif
   endif
 
-  if 'TARGET_XML_FILES' in config_target
-    gdbstub_xml_files = []
-    foreach gdbstub_xml : config_target['TARGET_XML_FILES'].split()
-      gdbstub_xml_files += 'gdbstub/gdb-xml/' + gdbstub_xml
-    endforeach
-    gdbstub_xml = custom_target(target + '-gdbstub-xml.c',
-                                output: target + '-gdbstub-xml.c',
-                                input: files(gdbstub_xml_files),
-                                command: [feature_to_c, '@INPUT@'],
-                                capture: true)
-    arch_srcs += gdbstub_xml
-  endif
-
   if target in config_target_info
     arch_srcs += config_target_info[target]
   else

stubs/meson.build

@@ -89,8 +89,6 @@ if have_system
 endif
 
 if have_system or have_user
-  stub_ss.add(files('gdbstub.c'))
-
   # Also included in have_system for --disable-tcg builds
   stub_ss.add(files('replay.c'))