link error building portmap

I'm trying to use nfs mount within busybox. This requires mount &
portmap. I am getting a link failure that I cannot figure out.

I have enabled busybox MOUNT, FEATURE_MOUNT_NFS, FEATURE_HAVE_RPC as well as uclibc UCLIBC_HAS_RPC and top level CONFIG_BR2_PACKAGE_PORTMAP. I have done a top level "make clean".

Here is the output of top level make. I have even explicitly put the full path to libc.a in the link line (in portmap Makefile):

mike at himalia:/home/buildroot$ make

Checking build system dependencies:

BUILDROOT_DL_DIR clean:                         Ok
CC clean:                                       Ok
CXX clean:                                      Ok
CPP clean:                                      Ok
CFLAGS clean:                                   Ok
INCLUDES clean:                                 Ok
CXXFLAGS clean:                                 Ok
which installed:                                Ok
sed works:                                      Ok (/bin/sed)

GNU make version '3.81': Ok
C compiler '/usr/bin/gcc'
C compiler version '4.1.3': Ok
C++ compiler '/usr/bin/g++'

C++ compiler version '4.1.3':                   Ok
bison installed:                                Ok
flex installed:                                 Ok
gettext installed:                              Ok
makeinfo installed:                             Ok
Build system dependencies:                      Ok

rm -rf /home/buildroot/project_build_arm/uclibc/buildroot-config mkdir -p /home/buildroot/project_build_arm/uclibc
cp -dpRf package/config/buildroot-config /home/buildroot/project_build_arm/uclibc/buildroot-config /usr/bin/make -j1 CC=/home/buildroot/build_arm/staging_dir/usr/bin/arm-linux-uclibc-gcc O="-Os -I/home/buildroot/build_arm/staging_dir/usr/include -I/home/buildroot/build_arm/staging_dir/include --sysroot=/home/buildroot/build_arm/staging_dir/ -isysroot /home/buildroot/build_arm/staging_dir -mtune=arm9tdmi" -C /home/buildroot/build_arm/portmap_5beta
make[1]: Entering directory `/home/buildroot/build_arm/portmap_5beta' /home/buildroot/build_arm/staging_dir/usr/bin/arm-linux-uclibc-gcc -Dperror=xperror -DCHECK_PORT -DFACILITY=LOG_AUTH
-DIGNORE_SIGCHLD -Os
-I/home/buildroot/build_arm/staging_dir/usr/include -I/home/buildroot/build_arm/staging_dir/include --sysroot=/home/buildroot/build_arm/staging_dir/ -isysroot
/home/buildroot/build_arm/staging_dir -mtune=arm9tdmi -c -o portmap.o
portmap.c /home/buildroot/build_arm/staging_dir/usr/bin/arm-linux-uclibc-gcc -Dperror=xperror -DCHECK_PORT -DFACILITY=LOG_AUTH
-DIGNORE_SIGCHLD -Os
-I/home/buildroot/build_arm/staging_dir/usr/include -I/home/buildroot/build_arm/staging_dir/include --sysroot=/home/buildroot/build_arm/staging_dir/ -isysroot
/home/buildroot/build_arm/staging_dir -mtune=arm9tdmi -c -o
pmap_check.o pmap_check.c /home/buildroot/build_arm/staging_dir/usr/bin/arm-linux-uclibc-gcc -Dperror=xperror -DCHECK_PORT -DFACILITY=LOG_AUTH
-DIGNORE_SIGCHLD -Os
-I/home/buildroot/build_arm/staging_dir/usr/include -I/home/buildroot/build_arm/staging_dir/include --sysroot=/home/buildroot/build_arm/staging_dir/ -isysroot
/home/buildroot/build_arm/staging_dir -mtune=arm9tdmi -o portmap
/home/buildroot/build_arm/staging_dir/usr/lib/libc.a portmap.o pmap_check.o from_local.o get_myaddress.o
portmap.o: In function `main':
portmap.c:(.text+0x914): undefined reference to svcudp_create' portmap.c:(.text+0x9a0): undefined reference to svctcp_create' portmap.c:(.text+0xa1c): undefined reference to `svc_run'
collect2: ld returned 1 exit status
make[1]: *** [portmap] Error 1
make[1]: Leaving directory `/home/buildroot/build_arm/portmap_5beta'
make: *** [/home/buildroot/build_arm/portmap_5beta/portmap] Error 2

Make sure I'm pointing to the right libc.a:
mike at himalia:/home/buildroot$ arm-linux-gcc -print-file-name=libc.a /home/buildroot/build_arm/staging_dir/usr/lib/libc.a

Using nm, I verified that libc.a does in fact contain 2 of the 3 unresolved external references.
mike at himalia:/home/buildroot$ nm /home/buildroot/build_arm/staging_dir/usr/lib/libc.a | grep svc_run svc_run.os:
00000028 T svc_run
mike at himalia:/home/buildroot$ nm /home/buildroot/build_arm/staging_dir/usr/lib/libc.a | grep svctcp_create 00000354 T svctcp_create

Anyone have any ideas what is going on here?

Thanks in advance.

Mike

I think I may have a solution. After a bit of work with ld --print-map
flag I discovered portmap is using shared libraries (not static as I thought). The shared lib appeared to be missing svc* functions.

I found that adding svc_run.c to the buildroot/toolchain_build_arm/uClibc-0.9.29/libc/inet/rpc/Makefile.in
allowed the link step to complete. I do not believe that this is the
proper place for this change as this is in a generated target specific tree. I have looked to docs & source tree to find the appropriate place but have been unable.

If someone could point me to the correct location to patch that would be helpful.

As well, if someone could apply this patch to buildroot that would be good as well.

Following is a patch to be applied from the following location:
buildroot/toolchain_build_arm/uClibc-0.9.29/libc/inet/rpc. If this is
not a good way to submit a patch, any helpful suggestions would be appreciated.

--- start ---

diff -Naur old/Makefile.in new/Makefile.in
@@ -15,7 +15,7 @@
       pmap_clnt.c pm_getmaps.c pm_getport.c pmap_prot.c pmap_prot2.c \
       rcmd.c rexec.c rpc_cmsg.c rpc_commondata.c rpc_dtablesize.c \
       rpc_prot.c rpc_thread.c rtime.c ruserpass.c sa_len.c \
-       svc.c svc_auth.c svc_authux.c \
+       svc.c svc_auth.c svc_authux.c svc_run.c \
       xdr.c xdr_array.c xdr_mem.c xdr_rec.c xdr_reference.c

endif

-- end ---

Regards,

Mike Sander.