From 8953ba9c2f584c43c777518cbb0eba059666661a Mon Sep 17 00:00:00 2001
From: azuresky01 <167838430+azuresky01@users.noreply.github.com>
Date: Tue, 24 Jun 2025 14:27:15 +0800
Subject: [PATCH] Fix INTERFACE64 builds on Loongarch64 with LLVM

fix https://github.com/OpenMathLib/OpenBLAS/issues/5331
---
 Makefile.system | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Makefile.system b/Makefile.system
index 38646c3c6..072e4b140 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -1191,6 +1191,13 @@ endif
 else ifeq ($(ARCH), $(filter $(ARCH),mips))
 FCOMMON_OPT += -mabi=32
 endif
+ifeq ($(ARCH), $(filter $(ARCH),loongarch64))
+ifdef INTERFACE64
+ifneq ($(INTERFACE64), 0)
+FCOMMON_OPT +=  -fdefault-integer-8
+endif
+endif
+endif
 else
 ifdef BINARY64
 ifneq ($(OSNAME), AIX)