From 848bf53fe0e12e207bbddb22817594fd06ef041b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
Date: Tue, 29 Jul 2025 16:17:43 +0300
Subject: [PATCH] github: Pass -D__USE_MINGW_ANSI_STDIO=1 for test-llvm on x86

This is required for properly formatting long doubles on x86
with UCRT (which doesn't use the mingw builtin printfs by default).

This fixes running the LLVM testsuite on x86 after commit
9bf7d04c4386daf1ef0acf95782a59855c98474a in llvm-project.
---
 .github/workflows/test-llvm.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/test-llvm.yml b/.github/workflows/test-llvm.yml
index 805be09..8fcad6f 100644
--- a/.github/workflows/test-llvm.yml
+++ b/.github/workflows/test-llvm.yml
@@ -92,6 +92,7 @@ jobs:
             -DLLVM_WINDOWS_PREFER_FORWARD_SLASH=OFF `
             -DCMAKE_C_COMPILER=clang `
             -DCMAKE_CXX_COMPILER=clang++ `
+            -DCMAKE_CXX_FLAGS="-D__USE_MINGW_ANSI_STDIO=${{startsWith(matrix.arch, 'a') && '0' || '1'}}" `
             -DLLVM_LIT_ARGS="-v --time-tests"
           ninja test-depends
           cp c:\llvm-mingw\bin\libc++.dll bin