Add gfortran workaround for ABI violations in LAPACKE

for #2154 (see gcc bug 90329)

Author: martin-frbg

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