From 81586e7b0a0e236b3db6e4ace7c8990a3adcc7f4 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Fri, 23 Jun 2023 02:39:37 +0200
Subject: [PATCH] work around an optimizer bug in Xuantie's gfortran

---
 Makefile.system | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Makefile.system b/Makefile.system
index 7d26eccc3..f67f74e84 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -1614,6 +1614,11 @@ ifdef OS_WINDOWS
 LAPACK_FFLAGS := $(filter-out -fopenmp -mp -openmp -xopenmp=parallel,$(FFLAGS))
 LAPACK_FPFLAGS := $(filter-out -fopenmp -mp -openmp -xopenmp=parallel,$(FPFLAGS))
 else
+ifeq ($(CORE), C910V)
+LAPACK_FFLAGS := $(filter-out -O2 -O3,$(FFLAGS)
+LAPACK_FFLAGS += -O1
+LAPACK_FPFLAGS := $(FPFLAGS)
+else
 LAPACK_FFLAGS := $(FFLAGS)
 LAPACK_FPFLAGS := $(FPFLAGS)
 endif