[RFC PATCH v2 Hurd] Add a libstore library without libparted

[Zhaoming Luo]

I haven't added `USE_PARTED` to exlcude the parted module, but I have
added `?=` to `dir` and `libname` to factorize the Makefile. However,
the libstore-noparted.so.0.3 file does not link to libparted. It is
expected to link to libparted before I use `USE_PARTED` to exclude the
parted module.

The commands to reproduce:
```
mkdir build
cd build && ../configure
make libstore-noparted
ldd libstore-noparted/libstore-noparted.so.0.3
```

---
 Makefile                   | 1 +
 libstore-noparted/Makefile | 9 +++++++++
 libstore/Makefile          | 5 +++--
 3 files changed, 13 insertions(+), 2 deletions(-)
 create mode 100644 libstore-noparted/Makefile

diff --git a/Makefile b/Makefile
index 9d9e33c3..f8e38b71 100644
--- a/Makefile
+++ b/Makefile
@@ -33,6 +33,7 @@ lib-subdirs = libshouldbeinlibc libihash libiohelp libports \
              libbpf \
              libmachdev \
              libirqhelp \
+             libstore-noparted \
 
 # Hurd programs
 prog-subdirs = auth proc exec term \
diff --git a/libstore-noparted/Makefile b/libstore-noparted/Makefile
new file mode 100644
index 00000000..694218c1
--- /dev/null
+++ b/libstore-noparted/Makefile
@@ -0,0 +1,9 @@
+# Use the source files from the libstore library
+
+dir := libstore-noparted
+
+libname := libstore-noparted
+
+VPATH += $(top_srcdir)/libstore
+
+include ../libstore/Makefile
diff --git a/libstore/Makefile b/libstore/Makefile
index c7af958b..62b25bd6 100644
--- a/libstore/Makefile
+++ b/libstore/Makefile
@@ -20,10 +20,11 @@
 #   along with this program; if not, write to the Free Software
 #   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
 
-dir := libstore
+dir ?= libstore
+libname ?= libstore
+
 makemode := library
 
-libname = libstore
 SRCS = create.c derive.c make.c rdwr.c set.c \
        enc.c encode.c decode.c clone.c argp.c kids.c flags.c \
        open.c xinl.c typed.c map.c url.c unknown.c \
-- 
2.47.1