Support gdb debugger for clangarm64 to run with Windows on Arms

[truongan012]

Hello all,
As I checked that, currently clangarm64 has supported for building aarch64 exe (mingw-w64-clang-aarch64-clang)
I'm using a window on arm laptop and want to debug with gdb for arm64 on window, IDE: Visual Studio Code.
However, it seems there is no any package for gdb so far, like mingw-w64-clang-aarch64-gdb.
Can you check to add this package for clangarm64?
Thanks!

[lazka]

The last time I tried to build it (2023-05) it failed with "BFD does not support target aarch64-w64-mingw32." Maybe that has changed. Let me try.

[lazka]

It fails with this now:

  ld.lld: error: undefined symbol: windows_get_absolute_argv0(char const*)
  >>> referenced by main.o:(captured_main_1(captured_main_args*))
  clang++: error: linker command failed with exit code 1 (use -v to see invocation)
  make[2]: *** [Makefile:2232: gdb.exe] Error 1

But I see a possible fix for that.

[lazka]

No various things are not implemented for arm64, this gets basics to build at least:

diff --git a/gdb/configure.host b/gdb/configure.host
index fdd651987e3..3a2ca46d2fb 100644
--- a/gdb/configure.host
+++ b/gdb/configure.host
@@ -182,6 +182,9 @@ x86_64-*-openbsd*)	gdb_host=obsd64 ;;
 x86_64-*-mingw*)        gdb_host=mingw64
 			gdb_host_obs=mingw-hdep.o
 			;;
+aarch64-*-mingw*)        gdb_host=mingw64
+			gdb_host_obs=mingw-hdep.o
+			;;
 x86_64-*-cygwin*)	gdb_host=cygwin64 ;;
 x86_64-*-gnu*)		gdb_host=gnu64 ;;
 m32r*-*-linux*)          gdb_host=linux ;;
--- gdb-16.3/gdb/nat/windows-nat.h.orig	2025-04-20 19:22:05.000000000 +0200
+++ gdb-16.3/gdb/nat/windows-nat.h	2025-09-16 18:45:30.155747200 +0200
@@ -35,6 +35,12 @@
 #define CONTEXT_EXTENDED_REGISTERS 0
 #endif
 
+
+#ifndef CONTEXT_SEGMENTS
+/* Not defined for ARM/ARM64 */
+#define CONTEXT_SEGMENTS 0
+#endif
+
 namespace windows_nat
 {

so not much we can do

[Andarwinux]

why not use windbg? clang/lld have pdb support.