Makefile.shared needs to know how it can reach itself.

Makefile.org

@@ -269,6 +269,7 @@ build-shared: do_$(SHLIB_TARGET) link-shared
 do_$(SHLIB_TARGET):
 	@ libs='-L. ${SHLIBDEPS}'; for i in ${SHLIBDIRS}; do \
 		$(NEWMAKE) -f Makefile.shared \
+			SHARED_MAKEFILE=Makefile.shared \
 			CC="$(CC)" LDFLAGS="$(LDFLAGS)" \
 			SHARED_LDFLAGS="$(SHARED_LDFLAGS)" \
 			LIBNAME=$$i LIBVERSION=${SHLIB_MAJOR}.${SHLIB_MINOR} \

engines/Makefile.ssl

@@ -70,6 +70,7 @@ libs:	$(LIBOBJ)
 		set -e; \
 		for l in $(LIBNAMES); do \
 			$(NEWMAKE) -f ../Makefile.shared \
+				SHARED_MAKEFILE=../Makefile.shared \
 				CC="$(CC)" LIBNAME=$$l LIBEXTRAS=e_$$l.o \
 				LIBDEPS='-L.. -lcrypto $(EX_LIBS)' \
 				link_o.$(SHLIB_TARGET); \