From 900d5a3205bd06c04990ff842449ec80808d5027 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Thu, 6 Jun 2019 10:18:40 +0200
Subject: [PATCH] Add gfortran workaround for ABI violations in LAPACKE

for #2154 (see gcc bug 90329)
---
 Makefile.system | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Makefile.system b/Makefile.system
index a95d6190f..49c02bbcb 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -744,6 +744,8 @@ CCOMMON_OPT += -DF_INTERFACE_GFORT
 FCOMMON_OPT += -Wall
 # make single-threaded LAPACK calls thread-safe #1847
 FCOMMON_OPT += -frecursive
+# work around ABI problem with passing single-character arguments
+FCOMMON_OPT += -fno-optimize-sibling-calls
 #Don't include -lgfortran, when NO_LAPACK=1 or lsbcc
 ifneq ($(NO_LAPACK), 1)
 EXTRALIB += -lgfortran