Set -fpcc-struct-return only for gcc compiler.
diff --git a/lib/Makefile.netware b/lib/Makefile.netware
index 642f051..a4f6ebb 100644
--- a/lib/Makefile.netware
+++ b/lib/Makefile.netware
@@ -146,7 +146,10 @@
LIBEXT = a
RANLIB = ranlib
CFLAGS += -m32
-CFLAGS += -fno-builtin -fpcc-struct-return -fno-strict-aliasing
+CFLAGS += -fno-builtin -fno-strict-aliasing
+ifeq ($(findstring gcc,$(CC)),gcc)
+CFLAGS += -fpcc-struct-return
+endif
CFLAGS += -Wall # -pedantic
ifeq ($(LIBARCH),LIBC)
ifeq ($(POSIXFL),1)
diff --git a/src/Makefile.netware b/src/Makefile.netware
index ebfbcb5..b801f3b 100644
--- a/src/Makefile.netware
+++ b/src/Makefile.netware
@@ -141,7 +141,10 @@
LDFLAGS = -T
LIBEXT = a
CFLAGS += -m32
-CFLAGS += -fno-builtin -fpcc-struct-return -fno-strict-aliasing
+CFLAGS += -fno-builtin -fno-strict-aliasing
+ifeq ($(findstring gcc,$(CC)),gcc)
+CFLAGS += -fpcc-struct-return
+endif
CFLAGS += -Wall # -pedantic
ifeq ($(LIBARCH),LIBC)
ifeq ($(POSIXFL),1)
