From affa63a435df97a6526cb5b992eb6e3383762d5a Mon Sep 17 00:00:00 2001
From: Martin Vogel <martin.vogel@datadice.io>
Date: Fri, 6 Mar 2026 18:19:24 +0100
Subject: [PATCH] Fix Linux build: add _DEFAULT_SOURCE for endian macros

-std=c11 disables _DEFAULT_SOURCE on glibc, hiding le16toh/be16toh
from <endian.h>. Add -D_DEFAULT_SOURCE to CGo CFLAGS.
---
 internal/cbm/cbm.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/internal/cbm/cbm.go b/internal/cbm/cbm.go
index 44defaa0b..3f6764834 100644
--- a/internal/cbm/cbm.go
+++ b/internal/cbm/cbm.go
@@ -1,7 +1,7 @@
 package cbm
 
 /*
-#cgo CFLAGS: -std=c11 -O2 -Wall -Ivendored/ts_runtime/include
+#cgo CFLAGS: -std=c11 -D_DEFAULT_SOURCE -O2 -Wall -Ivendored/ts_runtime/include
 #include "cbm.h"
 #include "helpers.h"
 #include "lang_specs.h"