From 49bbf330ca592f439a07f24f137e61af1cc9c616 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Sun, 18 Jul 2021 22:19:19 +0200
Subject: [PATCH] Empirical workaround for numpy SVD NaN problem from issue
 3318

---
 kernel/Makefile.L2 | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/kernel/Makefile.L2 b/kernel/Makefile.L2
index 888a9b959..ac53c29c3 100644
--- a/kernel/Makefile.L2
+++ b/kernel/Makefile.L2
@@ -1,3 +1,10 @@
+FMAFLAG=
+ifndef OLDGCC
+ifdef HAVE_FMA3
+FMAFLAG = -mfma
+endif
+endif
+
 ### GEMV ###
 
 ifndef SGEMVNKERNEL
@@ -263,7 +270,7 @@ $(KDIR)dgemv_n$(TSUFFIX).$(SUFFIX)  $(KDIR)dgemv_n$(TSUFFIX).$(PSUFFIX)  : $(KER
 	$(CC) -c $(CFLAGS) -DDOUBLE -UCOMPLEX  -UTRANS $< -o $@
 
 $(KDIR)dgemv_t$(TSUFFIX).$(SUFFIX)  $(KDIR)dgemv_t$(TSUFFIX).$(PSUFFIX)  : $(KERNELDIR)/$(DGEMVTKERNEL) $(TOPDIR)/common.h $(GEMVDEP)
-	$(CC) -c $(CFLAGS) -DDOUBLE -UCOMPLEX  -DTRANS $< -o $@
+	$(CC) -c $(CFLAGS) $(FMAFLAG) -DDOUBLE -UCOMPLEX  -DTRANS $< -o $@
 endif
 
 $(KDIR)qgemv_n$(TSUFFIX).$(SUFFIX)  $(KDIR)qgemv_n$(TSUFFIX).$(PSUFFIX)  : $(KERNELDIR)/$(QGEMVNKERNEL)