--- a/test/dynload_plain/Makefile.embedded	Mon Apr 29 11:51:30 2019 +0200
+++ b/test/dynload_plain/Makefile.embedded	Thu Oct 24 23:19:20 2019 +0200
@@ -1,20 +1,30 @@
+# path to default libc.so file, easier to do via shell than in code (see main() in dynload_plain.c)
+# for compat: first gmake style, then assignment op which will use ! as part of var name on gmake<4
+#             and thus not override previously set var
+DEF_C_DYLIB=$(shell ((ls /lib*/libc.so* || ls /usr/lib/libc.so*) | grep -v '\.a$$' | (sort -V -r || sort -t . -n -k 2)) 2>/dev/null | head -1)
+DEF_C_DYLIB!=((ls /lib*/libc.so* || ls /usr/lib/libc.so*) | grep -v '\.a$$' | (sort -V -r || sort -t . -n -k 2)) 2>/dev/null | head -1
+
 APP = dynload_plain
 OBJS = dynload_plain.o
+TEST_U8_SO = dynload_plain_ß_test # @@@ unsure if every platform handles ß, here (ANSI, UTF-8, ...)
 
 TOP = ../..
-CFLAGS  += -I${TOP}/dynload
+CFLAGS  += -I${TOP}/dynload -DDEF_C_DYLIB=\"${DEF_C_DYLIB}\"
 LDFLAGS += -L${TOP}/dynload
 LDLIBS  += -ldynload_s
 # Works on: Darwin, NetBSD.
 # Linux: add '-ldl'
 
-all: ${APP}
+all: ${APP} ${TEST_U8_SO}
 
 .PHONY: all clean
 
 ${APP}: ${OBJS}
 	${CC} ${OBJS} ${LDFLAGS} ${LDLIBS} -o $@
 
+${TEST_U8_SO}:
+	echo 'int dynload_plain_testfunc() { return 5; }' | ${CC} -shared -x c - -o ${TEST_U8_SO}
+
 clean:
-	rm -f ${APP} ${OBJS}
+	rm -f ${APP} ${OBJS} ${TEST_U8_SO}