--- a/config.sub
+++ b/config.sub
@@ -1749,6 +1749,9 @@
 	-dicos*)
 		os=-dicos
 		;;
+	-adros*)
+		os=-adros
+		;;
 	-nacl*)
 		;;
 	-ios)
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1020,6 +1020,12 @@
 i[34567]86-*-elf*)
 	tm_file="${tm_file} i386/unix.h i386/att.h elfos.h newlib-stdint.h i386/i386elf.h"
 	;;
+i[34567]86-*-adros*)
+	tm_file="${tm_file} i386/unix.h i386/att.h elfos.h newlib-stdint.h i386/adros.h"
+	tmake_file="${tmake_file} i386/t-crtstuff"
+	use_gcc_stdint=wrap
+	default_use_cxa_atexit=yes
+	;;
 x86_64-*-elf*)
 	tm_file="${tm_file} i386/unix.h i386/att.h elfos.h newlib-stdint.h i386/i386elf.h i386/x86-64.h"
 	;;
--- /dev/null
+++ b/gcc/config/i386/adros.h
@@ -0,0 +1,69 @@
+/* Target definitions for i386 AdrOS.
+   Copyright (C) 2024 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+/* AdrOS is a 32-bit POSIX-like operating system */
+
+#undef  TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS()         \
+  do {                                    \
+    builtin_define ("__adros__");         \
+    builtin_define ("__AdrOS__");         \
+    builtin_define ("__unix__");          \
+    builtin_assert ("system=adros");      \
+    builtin_assert ("system=unix");       \
+    builtin_assert ("system=posix");      \
+  } while (0)
+
+/* Use ELF object format */
+#undef  OBJECT_FORMAT_ELF
+#define OBJECT_FORMAT_ELF 1
+
+/* Default to 32-bit */
+#undef  TARGET_64BIT_DEFAULT
+#define TARGET_64BIT_DEFAULT 0
+
+/* Use crt0.o from libgloss/adros */
+#undef  STARTFILE_SPEC
+#define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
+
+#undef  ENDFILE_SPEC
+#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
+
+/* Link against Newlib's libc and our libgloss stub library */
+#undef  LIB_SPEC
+#define LIB_SPEC "-lc -ladros -lgcc"
+
+/* Dynamic linker — not used yet (static linking only for now) */
+#undef  LINK_SPEC
+#define LINK_SPEC "-m elf_i386 %{shared:-shared} %{static:-static} %{!static: %{rdynamic:-export-dynamic}}"
+
+/* Use Newlib's stdint types */
+#undef  SIZE_TYPE
+#define SIZE_TYPE "unsigned int"
+
+#undef  PTRDIFF_TYPE
+#define PTRDIFF_TYPE "int"
+
+#undef  WCHAR_TYPE
+#define WCHAR_TYPE "int"
+
+#undef  WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 32
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -685,6 +685,10 @@
 i[34567]86-*-elf*)
 	tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
 	;;
+i[34567]86-*-adros*)
+	tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
+	extra_parts="$extra_parts crti.o crtn.o"
+	;;
 x86_64-*-elf* | x86_64-*-rtems*)
 	tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
 	;;
--- /dev/null
+++ b/libgcc/config/i386/crti-adros.S
@@ -0,0 +1,14 @@
+/* crti.S for AdrOS — .init/.fini prologue */
+	.section .init
+	.global _init
+	.type _init, @function
+_init:
+	push %ebp
+	mov  %esp, %ebp
+
+	.section .fini
+	.global _fini
+	.type _fini, @function
+_fini:
+	push %ebp
+	mov  %esp, %ebp
--- /dev/null
+++ b/libgcc/config/i386/crtn-adros.S
@@ -0,0 +1,10 @@
+/* crtn.S for AdrOS — .init/.fini epilogue */
+	.section .init
+	pop %ebp
+	ret
+
+	.section .fini
+	pop %ebp
+	ret
+
+	.section .note.GNU-stack,"",@progbits