diff -Nur gcc-15.3.0.orig/gcc/config/loongarch/uclibc.h gcc-15.3.0/gcc/config/loongarch/uclibc.h
--- gcc-15.3.0.orig/gcc/config/loongarch/uclibc.h	1970-01-01 01:00:00.000000000 +0100
+++ gcc-15.3.0/gcc/config/loongarch/uclibc.h	2026-06-28 10:42:54.366223029 +0200
@@ -0,0 +1,23 @@
+/* Definitions for uCLibc C library support.
+   Copyright (C) 2024-2025 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.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+
+#ifndef LA_DEFAULT_TARGET_UCLIBC
+#define LA_DEFAULT_TARGET_UCLIBC
+#endif
diff -Nur gcc-15.3.0.orig/gcc/config.gcc gcc-15.3.0/gcc/config.gcc
--- gcc-15.3.0.orig/gcc/config.gcc	2026-06-12 08:09:06.107518032 +0200
+++ gcc-15.3.0/gcc/config.gcc	2026-06-28 10:47:51.591407374 +0200
@@ -2588,6 +2588,9 @@
 	tm_file="elfos.h gnu-user.h linux.h linux-android.h glibc-stdint.h ${tm_file}"
 	case ${target} in
 	  *-linux-musl*) tm_file="${tm_file} loongarch/musl.h"
+	  ;;
+	  *-linux-uclibc*) tm_file="${tm_file} loongarch/uclibc.h"
+	  ;;
 	esac
 	tm_file="${tm_file} loongarch/gnu-user.h loongarch/linux.h loongarch/loongarch-driver.h"
 	extra_options="${extra_options} linux-android.opt"
@@ -5108,6 +5111,7 @@
 		case ${target} in
 		  *-linux-gnu*) triplet_os="linux-gnu";;
 		  *-linux-musl*) triplet_os="linux-musl";;
+		  *-linux-uclibc*) triplet_os="linux-uclibc";;
 		  *-elf*) triplet_os="elf";;
 		  *)
 			  echo "Unsupported target ${target}." 1>&2