Add shared library version of libcli_main

ports/nacl-spawn/Makefile

 # Copyright (c) 2014 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # TODO(hamaji): include $NACL_SDK_ROOT/tools/common.mk.
 
 NACL_SPAWN_OBJS=nacl_spawn.o path_util.o
 # For now, we do not support spawning a new glibc process from newlib.
 
 NACL_SPAWN_OBJS+=elf_reader.o library_dependencies.o
 
 TEST_EXES=test/elf_reader test/library_dependencies
 TEST_BINARIES=test/test_exe test/libtest1.so test/libtest2.so test/libtest3.so
 
 all: test
 
 # Targets for libcli_main
 
 libcli_main.a: cli_main.o nacl_startup_untar.o
         rm -f $@
         $(NACLAR) rcs $@ $^
 
+libcli_main.so: cli_main.o nacl_startup_untar.o
+        $(NACLCXX) $(LDFLAGS) -shared $^ -o $@
+
 cli_main.o: cli_main.c
         $(NACLCC) $(CFLAGS) -c $< -o $@
 
 nacl_startup_untar.o: nacl_startup_untar.c
         $(NACLCC) $(CFLAGS) -c $< -o $@
 
 # Targets for libnacl_spawn
 
 libnacl_spawn.so: $(NACL_SPAWN_OBJS)
         $(NACLCXX) $(LDFLAGS) -shared $^ -o $@
 
 libnacl_spawn.a: $(NACL_SPAWN_OBJS)
         rm -f $@
         $(NACLAR) rcs $@ $^
 
 %.o: %.cc
         $(NACLCXX) $(CXXFLAGS) -c $< -o $@
 
 # Targets for tests
 
 test: $(TEST_EXES) $(TEST_BINARIES)
         ./test/run_test.sh
 
 test/elf_reader: elf_reader.cc
-        $(NACLCXX) -DDEFINE_ELF_READER_MAIN $< -o $@
+        $(NACLCXX) $(LDFLAGS) $(CXXFLAGS) -DDEFINE_ELF_READER_MAIN $< -o $@
 test/library_dependencies: elf_reader.o path_util.o library_dependencies.cc
-        $(NACLCXX) -DDEFINE_LIBRARY_DEPENDENCIES_MAIN $^ -o $@
+        $(NACLCXX) $(LDFLAGS) $(CXXFLAGS) -DDEFINE_LIBRARY_DEPENDENCIES_MAIN $^ -o $@
 
 # We use -nostdlib not to have libc.so in their dependencies.
 test/test_exe: test/test_exe.c test/libtest1.so test/libtest2.so
         $(NACLCC) $< -nostdlib -Wl,-rpath-link=test -Ltest -ltest1 -ltest2 -o $@
 test/libtest1.so: test/libtest1.c test/libtest3.so
         $(NACLCC) $< -fPIC -nostdlib -shared -Ltest -ltest3 -o $@
 test/libtest2.so: test/libtest2.c test/libtest3.so
         $(NACLCC) $< -fPIC -nostdlib -shared -Ltest -ltest3 -o $@
 test/libtest3.so: test/libtest3.c
         $(NACLCC) $< -fPIC -nostdlib -shared -o $@
 
 clean:
         rm -f *.a *.o *.so $(TEST_EXES) $(TEST_BINARIES)