From edacf9b3973634d2540d1b7d076715d3f37d9c79 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Tue, 30 Apr 2024 08:50:47 +0200
Subject: [PATCH] Work around spurious BLAS3 test errors on LOONGSON3R3/4
 (#4667)

Force compilation with gfortran to use O0 on older Loongson hardware to avoid spurious test failures
---
 ctest/Makefile | 3 +++
 test/Makefile  | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/ctest/Makefile b/ctest/Makefile
index 6c7cc1ed5..46885f3bb 100644
--- a/ctest/Makefile
+++ b/ctest/Makefile
@@ -25,6 +25,9 @@ endif
 
 override CFLAGS += -DADD$(BU) -DCBLAS
 ifeq ($(F_COMPILER),GFORTRAN)
+ifneq (, $(filter $(CORE),LOONGSON3R3 LOONGSON3R4))
+	override FFLAGS = $(filter_out(-O2 -O3,$(FFLAGS)) -O0
+endif
 	override FFLAGS += -fno-tree-vectorize
 endif
 override TARGET_ARCH=
diff --git a/test/Makefile b/test/Makefile
index 6a50b6c98..85bdca103 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -1,6 +1,9 @@
 TOPDIR	= ..
 include ../Makefile.system
 ifeq ($(F_COMPILER),GFORTRAN)
+ifneq (, $(filter $(CORE),LOONGSON3R3 LOONGSON3R4))
+	override FFLAGS = $(filter_out(-O2 -O3,$(FFLAGS)) -O0
+endif
         override FFLAGS += -fno-tree-vectorize
 endif