Add X86 i686 gcc 15.2.0 (#11388)

* add i686 x86 newlib toolchain

* add missing x86 gcc option to manual_dist.yml

* fix typo

4 files changed, 34 insertions, 21 deletions

diff --git a/.github/workflows/manual_dist.yml b/.github/workflows/manual_dist.yml
index 2977807efd..8bf46ed74c 100644
--- a/.github/workflows/manual_dist.yml
+++ b/.github/workflows/manual_dist.yml
@@ -35,6 +35,7 @@ on:
           - "sourcery-riscv64-unknown-elf"
           - "gcc"
           - "sourcery-riscv32-esp32"
+          - "i686-x86-newlib"
       bsp_config:
         description: 'Type a config you want mannual test in .config, like: CONFIG_RT_USING_DEBUG=y,CONFIG_RT_DEBUGING_COLOR=y,CONFIG_RT_DEBUGING_CONTEXT=y'
         required: false
@@ -127,6 +128,13 @@ jobs:
         run: |
           sudo apt-get -qq install libsdl2-dev
 
+      - name: Install i686 X86 Newlib ToolChains
+        if: ${{ github.event.inputs.bsp_tool_chain == 'i686-x86-newlib' && success() }}
+        run: |
+          source tools/ci/toolchain.sh i686-atxhua-newlib-elf-gcc
+          echo "RTT_EXEC_PATH=/opt/i686-atxhua-newlib-elf-gcc/bin" >> $GITHUB_ENV
+          echo "RTT_CC_PREFIX=i686-atxhua-newlib-elf-" >> $GITHUB_ENV
+
       - name: Bsp Scons Compile
         if: ${{ success() }}
         shell: bash
diff --git a/bsp/x86/README.md b/bsp/x86/README.md
index 12ead6f4d0..bc649b5885 100644
--- a/bsp/x86/README.md
+++ b/bsp/x86/README.md
@@ -6,15 +6,25 @@
 
 编译RT-Thread for x86版本，还需要一份支持newlib的工具链，可以通过以下地址获得：
 
-*[i386-unknown-elf_for_x86_64-pc-linux-gnu_latest.tar.bz2](http://117.143.63.254:9012/www/rt-smart/i386-unknown-elf_for_x86_64-pc-linux-gnu_latest.tar.bz2)
+* [i386-unknown-elf_for_x86_64-pc-linux-gnu_latest.tar.bz2](http://117.143.63.254:9012/www/rt-smart/i386-unknown-elf_for_x86_64-pc-linux-gnu_latest.tar.bz2)
+* [ GCC 15.2.0 w/ Newlib 4.6.0.20260123: https://github.com/atxhua/i686-atxhua-newlib-elf/releases/download/15.2.0/i686-atxhua-newlib-elf-linux.tar.gz ](https://github.com/atxhua/i686-atxhua-newlib-elf/releases/download/15.2.0/i686-atxhua-newlib-elf-linux.tar.gz)
 
-下载后解压，然后在rtconfig.py中配置其中的EXEC_PATH变量
 
+下载后解压，然后配置RTT_EXEC_PATH & RTT_CC_PREFIX 变量
+```bash
+export RTT_EXEC_PATH='/path/to/i686-atxhua-newlib-elf-linux/bin'
+export RTT_CC_PREFIX='i686-atxhua-newlib-elf-'
+```
+
+rtconfig.py
 ```python
 if  CROSS_TOOL == 'gcc':
     PLATFORM    = 'gcc'
     EXEC_PATH   = os.getenv('RTT_EXEC_PATH') or 'E:/Program Files/CodeSourcery/Sourcery_CodeBench_Lite_for_IA32_ELF/bin'
 
+if PLATFORM == 'gcc':
+    # toolchains
+    PREFIX = os.getenv('RTT_CC_PREFIX') or 'i386-unknown-elf-'
 ```
 
 然后在x86 bsp目录下执行scons命令来编译：
@@ -41,33 +51,28 @@ sudo apt install libncurses5-dev
 sudo apt install qemu-system-x86 grub-common xorriso
 ```
 
-然后执行`./run.sh`命令可以使用qemu来模拟执行(它也会生成可启动的iso文件)
+然后使用qemu来模拟执行
 
 ```bash
-~/workspace/rt-thread/bsp/x86$ ./run.sh
-xorriso 1.4.8 : RockRidge filesystem manipulator, libburnia project.
+$ qemu-system-i386 -M pc -kernel rtthread.elf -nographic
 
-Drive current: -outdev 'stdio:bootable.iso'
-Media current: stdio file, overwriteable
-Media status : is blank
-Media summary: 0 sessions, 0 data blocks, 0 data,  135g free
-Added to ISO image: directory '/'='/tmp/grub.uLz91i'
-xorriso : UPDATE : 578 files added in 1 seconds
-Added to ISO image: directory '/'='/home/bernard/workspace/rt-thread/bsp/x86/root'
-xorriso : UPDATE : 582 files added in 1 seconds
-xorriso : NOTE : Copying to System Area: 512 bytes from file '/usr/lib/grub/i386-pc/boot_hybrid.img'
-ISO image produced: 6007 sectors
-Written to medium : 6007 sectors at LBA 0
-Writing to 'stdio:bootable.iso' completed successfully.
+SeaBIOS (version 1.16.3-debian-1.16.3-2)
 
 
+iPXE (https://ipxe.org) 00:03.0 CA00 PCI2.10 PnP PMM+06FCAE00+06F0AE00 CA00
+                                                                               
+
+
+Booting from ROM..
  \ | /
 - RT -     Thread Operating System
- / | \     4.0.4 build Aug 22 2021
- 2006 - 2021 Copyright by rt-thread team
+ / | \     5.3.0 build May 10 2026 21:25:36
+ 2006 - 2024 Copyright by RT-Thread team
 Floppy Inc : NEC765B controller  Floppy Type : 2.88MB
+[I/DBG] root filesystem mounted.
 hello!
 msh />
+
 ```
 
 在qemu下可以按Ctrl-A + X退出qemu。
diff --git a/bsp/x86/rtconfig.py b/bsp/x86/rtconfig.py
index 2bc85b0151..b886b4d210 100644
--- a/bsp/x86/rtconfig.py
+++ b/bsp/x86/rtconfig.py
@@ -19,7 +19,7 @@ BUILD = 'debug'
 
 if PLATFORM == 'gcc':
     # toolchains
-    PREFIX = 'i386-unknown-elf-'
+    PREFIX = os.getenv('RTT_CC_PREFIX') or 'i386-unknown-elf-'
     CC = PREFIX + 'gcc'
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
diff --git a/tools/ci/toolchain.sh b/tools/ci/toolchain.sh
index 24293b32b7..40c7badc57 100755
--- a/tools/ci/toolchain.sh
+++ b/tools/ci/toolchain.sh
@@ -9,7 +9,7 @@ declare -A download_urls=(
 ["riscv-none-embed-gcc"]="https://github.com/RT-Thread/toolchains-ci/releases/download/v1.5/xpack-riscv-none-embed-gcc-8.3.0-2.3-linux-x64.tar.gz"
 ["riscv32-esp-elf-gcc"]="https://github.com/espressif/crosstool-NG/releases/download/esp-2022r1-RC1/riscv32-esp-elf-gcc11_2_0-esp-2022r1-RC1-linux-amd64.tar.xz"
 ["clang"]="https://github.com/ARM-software/LLVM-embedded-toolchain-for-Arm/releases/download/release-16.0.0/LLVMEmbeddedToolchainForArm-16.0.0-Linux-x86_64.tar.gz"
-
+["i686-atxhua-newlib-elf-gcc"]="https://github.com/atxhua/i686-atxhua-newlib-elf/releases/download/15.2.0/i686-atxhua-newlib-elf-linux.tar.gz"
 )
 
 show_help() {