<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/136535>136535</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Flang on Windows AArch64: LLVM ERROR: INIT_TRAMPOLINE operation is only supported on Linux.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            flang
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          hmartinez82
      </td>
    </tr>
</table>

<pre>
    While building the json-fortran project targeting `aarch64-w64-windows-gnu`:

```
[1/8] C:\msys64\clangarm64\bin\flang.exe -IC:\Dev\Github\MINGW-packages\mingw-w64-json-fortran\src\json-fortran-9.0.2\src -IC:\Dev\Github\MINGW-packages\mingw-w64-json-fortran\src\build-CLANGARM64\include -O3 -module-dir. -ffixed-line-length-72 -c CMakeFiles\jsonfortran.dir\src\json_value_module.F90-pp.f90 -o CMakeFiles\jsonfortran.dir\src\json_value_module.F90.obj
FAILED: CMakeFiles/jsonfortran.dir/src/json_value_module.F90.obj json_value_module.mod
C:\msys64\clangarm64\bin\flang.exe -IC:\Dev\Github\MINGW-packages\mingw-w64-json-fortran\src\json-fortran-9.0.2\src -IC:\Dev\Github\MINGW-packages\mingw-w64-json-fortran\src\build-CLANGARM64\include -O3 -module-dir. -ffixed-line-length-72 -c CMakeFiles\jsonfortran.dir\src\json_value_module.F90-pp.f90 -o CMakeFiles\jsonfortran.dir\src\json_value_module.F90.obj
LLVM ERROR: INIT_TRAMPOLINE operation is only supported on Linux.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.      Program arguments: C:/msys64/clangarm64/bin/flang -fc1 -triple aarch64-w64-windows-gnu -emit-obj -I C:\\Dev\\Github\\MINGW-packages\\mingw-w64-json-fortran\\src\\json-fortran-9.0.2\\src -I C:\\Dev\\Github\\MINGW-packages\\mingw-w64-json-fortran\\src\\build-CLANGARM64\\include -ffixed-line-length=72 -mrelocation-model pic -pic-level 2 -target-cpu generic -target-feature +v8a -target-feature +fp-armv8 -target-feature +neon -fversion-loops-for-stride -module-dir . -resource-dir C:/msys64/clangarm64/lib/clang/20 -mframe-pointer=none -O3 -o CMakeFiles\\jsonfortran.dir\\src\\json_value_module.F90.obj -x f95-cpp-input CMakeFiles\\jsonfortran.dir\\src\\json_value_module.F90-pp.f90
1. Running pass 'Function Pass Manager' on module 'FIRModule'.
2.      Running pass 'AArch64 Instruction Selection' on function '@_QMjson_value_modulePjson_check_all_for_duplicate_keys'
Exception Code: 0xC000001D
#0 0x00007ffda6cf9928 HandleAbort (C:\msys64\clangarm64\bin\libLLVM-20.dll+0xc59928)
#1 0x00007ffe7647ae50 (C:\Windows\System32\ucrtbase.dll+0x7ae50)
#2 0x8e39fffe7647ba5c
flang: error: flang frontend command failed due to signal (use -v to see invocation)
flang version 20.1.3
Target: aarch64-w64-windows-gnu
Thread model: posix
InstalledDir: C:/msys64/clangarm64/bin
flang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
flang: note: diagnostic msg: C:/msys64/tmp/json_value_module-0fd919
flang: note: diagnostic msg: C:/msys64/tmp/json_value_module-0fd919.sh
flang: note: diagnostic msg:

********************
ninja: build stopped: subcommand failed.
```
Attached are the two files, and also `json_value_module.F90` preprocessed
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzsV11v2zoS_TXMy4ACTVv-ePCD4kSpAedjE-_2MaCpkcyGIgWScp399QtKSuqbuneLbS-wD9dQEGtEnyGH5xyOhPeqMohLkl6S9OpCtGFv3XJfCxeUwX_P-cXOFq_Lz3ulEXat0oUyFYQ9whdvDS2tC04YaJz9gjJAEK7CEIeQKRPCyf10Qr_GP2UK-9XTyrRkysg4I6y7pmy4WEbSyxHh-ZykV7CKI9JV7V_9dELSldTCVMLV3c1OGZKuyhhK8IhA18PwKzyQdHWjwr7dkXR1u767-UwbIV9EhT7CKVN97aZzOnmSrryTJF2dBukiYQnvH_22BF396GqT3d1kj7fdWpSRui0Q6P0YaG2LViMtlEuAlqU6YkG1Mkg1mirs6YwDlbC6FS-YK91ljHmGNEmh3B_W8nwQusXnHjXJF4w2TVIuGFD7CyCJ3X0hLMuz9eb6ioyzUyief4TieYTq42eh4PsntS0Iy_6mwP87BTabf93C9ePj_WOkwfpuvX3ePma3D_eb9d012AadCMoaUB6s0a_g26axLmAB1sBGmfaYEJY9bK6zp2vw7a5WAQTs2gocxoEQLOxDaHysPM8Jz6uu7Im0NeG51oe3f3TwH8Jz5X3bMRGEKeCtttGwpBN-DzshX4ITEmPupyDkCxRt3fSOxBLoPg_OVk7UIFzV1miC73jeT2MgJM9PCMnzSEied4QEWsoR0OBUoxF-YIJAsVaBRgHQ9ZvdvdPrlGHnSPZnPHvfuh_R-Z3Rf1naMyQ_5fn3tCbjq0js2qG2siNNFAJqaJQE2ihJNR5QAwfanzBUNi1UaNDFAUOsRBFah0D45WEuzoXLhgpXH-bnnhm0Bmh5QOdjfm1t4-P6qA9OxWl_kyYkQB162zrZ3_8pNbTavYUIzzkDWpdO1Egbq0xAR8ZXxppB_x9keVaZH3f4vK_SI5SLlMqmoco0bfgdwIN7EJaNEnhsjYknfSO8B8JneWtkp_eHGLgVRlToCJ9FtfcQ3aj14213Q_gsSpAPkvuIlmWdbmBtfHBtD_yEGrtvA2r5lpHwGZmw53_cfjfrhy4i9yhfnoXWz6V1z0XbaCVFwOcXfPXxtyy7PkpsOqyVLTDKnR1XLH5GV7E34WMG7BjvZ2VZiKksFws-h0_CFBqzXXQrwuc_cWZptYu-STlLCq0Jv2RHmUYswhd9otG3RDibTmYCU3YC_rk3EZKunl59wHocNd1KF3bC4ztm96t3SA7sOMfxohwgdyKVhGWdXcW1onPWxS-9gZXOmoCmAGnrOtpoKZTGAooWoyfHllHoOKXWI9BDF0MEZQ6DevvEPdggKOAsGSVjwrJtJ72Y7UcNIsu2e4eigM4E4sjGenUkLItsEFpjcaXcT3nyySKNDd3GFkpUxvqgJNS-GlpR_gtX18kOx1i23WarT7D9dA35_WZz_3l9dwP5enP9BNv7Lnz5zxt4vH64f9z2qR8cNs5K9B4L6D2F8LknfNGdYMJ7K5WIp6ZrDXjpVBPeBziEzjGxABF6vP--3u-qFurmXItGWVksRou_AjPx-5_eml_eHaPMFxHhu3MJfLBNg0UM-Hb3R4onH95JshCE3Mfqur6JCF8tlH2vu-r3R3sbX3bO-iWZMmhO9veiWI6LxXghLnA5mk1SPuJsOr_YL3k5T-ejdDIapwWbp7tZkY6mo3RUsAJlweSFWnLGUzbhI5ay2WSeTEq-YMV4wcQiFdPJlEwY1kLpJPZDiXXVRdcJLUfjaTpOL7TYofbdax7nfd05j298btk1ULu28mTCtPLBf4MIKmhc5p2OrYHBemDw5ljB39ADXrROL__3Pm9Y4GHJ_xMAAP__9IC51Q">