Fix Makefile.system for OpenXL.

Chip-Kerchner · Chip-Kerchner · commit a69367c43b28 · 2023-09-29T09:29:41.000-05:00
diff --git a/Makefile.system b/Makefile.system
@@ -1170,6 +1170,8 @@ CCOMMON_OPT += -DF_INTERFACE_IBM
 FEXTRALIB += -lxlf90
 ifeq ($(C_COMPILER), GCC)
 FCOMMON_OPT += -qextname
+else ifeq ($(C_COMPILER), CLANG)
+FCOMMON_OPT += -qextname
 endif
 # FCOMMON_OPT	+= -qarch=440
 ifdef BINARY64
