From 5f7cd226cbb83edd693b84a769ddd5c8fdc131c8 Mon Sep 17 00:00:00 2001
From: Martin Vogel <martin.vogel@datadice.io>
Date: Thu, 19 Mar 2026 02:05:20 +0100
Subject: [PATCH] Use system regex on MSYS2, TRE only for pure MinGW
 (CBM_USE_TRE)

---
 src/foundation/compat_regex.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/foundation/compat_regex.c b/src/foundation/compat_regex.c
index 0ea000c3a..715ffbbe2 100644
--- a/src/foundation/compat_regex.c
+++ b/src/foundation/compat_regex.c
@@ -8,9 +8,9 @@
 
 #include <string.h>
 
-#ifdef _WIN32
+#ifdef CBM_USE_TRE
 
-/* ── Windows: use vendored TRE ───────────────────────────────── */
+/* ── Vendored TRE regex (for environments without system <regex.h>) ── */
 #include "../../vendored/tre/regex.h"
 
 _Static_assert(sizeof(regex_t) <= 256, "cbm_regex_t opaque buffer too small for TRE regex_t");
@@ -120,4 +120,4 @@ void cbm_regfree(cbm_regex_t *r) {
     regfree(re);
 }
 
-#endif /* _WIN32 */
+#endif /* CBM_USE_TRE */