Patch from Ralf Corsepius <corsepiu@faw.uni-ulm.de>:

The patch below actuallly consists of two patches:
1) moving librpc to c/src/librpc similar to what has been done to librtems++
2) reworked configure scripts, many safety and dependency checks added to
aclocal/*.m4 macros + configuration fixes.

To apply:

mkdir c/src/librpc
mkdir c/src/librpc/src
cp c/src/lib/librpc/*.c c/src/librpc/src
cp c/src/lib/librpc/Makefile.in c/src/librpc/src
mkdir c/src/librpc/include
mkdir c/src/librpc/include/rpc
cp c/src/lib/include/rpc/* c/src/librpc/include/rpc
patch -p1 < ../rtems-rc-19990820-7.diff
rm -rf c/src/lib/librpc
rm -rf c/src/lib/include/rpc
./autogen

The additional checks in aclocal/*m4 macros add rather restrictive, sometimes
unnecessarily restrictive constraints on the sequence of how macros can be
used in a configure.in script. Adding them has let my problems with some more
complicated configuration options vanish. Apparently some macros had not been
in the required order .

----

Now I still get some linking errors for some cpus and bsps, esp when linking
cdtest, but also at other locations:

e.g. this happens for mips64orion/p4600:

# make[5]: Entering directory
`/lfs/poseidon/users/rtems/src/multi/build/mips64orion-rtems/c/p4600/tests/samples/hello'

/opt/rtems/bin/mips64orion-rtems-gcc --pipe -B../../../../../../p4600/lib/
-specs bsp_specs -qrtems -DP4000 -DCPU_R4000 -DP3_DIAG -D_R4000 -D__mips=3
-mcpu=4600 -G0   -I../../../../../../p4600/lib/include/networking  -g -Wall
-ansi -fasm  -O4 -fomit-frame-pointer     -o o-p4600/hello.exe
o-p4600/init.o ../../../../../../p4600/lib/no-dpmem.rel
../../../../../../p4600/lib/no-event.rel
../../../../../../p4600/lib/no-msg.rel ../../../../../../p4600/lib/no-mp.rel
../../../../../../p4600/lib/no-part.rel
../../../../../../p4600/lib/no-signal.rel
../../../../../../p4600/lib/no-timer.rel
../../../../../../p4600/lib/no-rtmon.rel
/opt/rtems/mips64orion-rtems/lib/libc.a(dtoa.o): In function `_dtoa_r':
/opt/hermes/embedded/build/build-mips64orion-tools/mips64orion-rtems/newlib/libc/stdlib/../../../../../src/newlib/libc/stdlib/dtoa.c:348: relocation truncated to fit: R_MIPS_LITERAL no symbol
/opt/hermes/embedded/build/build-mips64orion-tools/mips64orion-rtems/newlib/libc/stdlib/../../../../../src/newlib/libc/stdlib/dtoa.c:348: relocation truncated to fit: R_MIPS_LITERAL no symbol
/opt/hermes/embedded/build/build-mips64orion-tools/mips64orion-rtems/newlib/libc/stdlib/../../../../../src/newlib/libc/stdlib/dtoa.c:348: relocation truncated to fit: R_MIPS_LITERAL no symbol
collect2: ld returned 1 exit status

# mips64orion-rtems-gcc -v
Reading specs from /opt/rtems/lib/gcc-lib/mips64orion-rtems/2.95.1/specs
gcc version 2.95.1 19990816 (release)

# mips64orion-rtems-ld -v
GNU ld version 2.9.5 (with BFD 2.9.5)

5 files changed, 85 insertions, 0 deletions

diff --git a/c/src/exec/librpc/Makefile.am b/c/src/exec/librpc/Makefile.am
new file mode 100644
index 0000000000..e74c9e748c
--- /dev/null
+++ b/c/src/exec/librpc/Makefile.am
@@ -0,0 +1,11 @@
+##
+## $Id$
+##
+
+AUTOMAKE_OPTIONS = foreign 1.4
+ACLOCAL_AMFLAGS = -I $(RTEMS_TOPdir)/aclocal
+
+SUBDIRS = include src
+
+include $(top_srcdir)/../../../automake/subdirs.am
+include $(top_srcdir)/../../../automake/local.am
diff --git a/c/src/exec/librpc/include/Makefile.am b/c/src/exec/librpc/include/Makefile.am
new file mode 100644
index 0000000000..d5385c1f70
--- /dev/null
+++ b/c/src/exec/librpc/include/Makefile.am
@@ -0,0 +1,10 @@
+##
+## $Id$
+##
+
+AUTOMAKE_OPTIONS = foreign 1.4
+
+SUBDIRS = rpc
+
+include $(top_srcdir)/../../../automake/subdirs.am
+include $(top_srcdir)/../../../automake/local.am
diff --git a/c/src/librpc/Makefile.am b/c/src/librpc/Makefile.am
new file mode 100644
index 0000000000..e74c9e748c
--- /dev/null
+++ b/c/src/librpc/Makefile.am
@@ -0,0 +1,11 @@
+##
+## $Id$
+##
+
+AUTOMAKE_OPTIONS = foreign 1.4
+ACLOCAL_AMFLAGS = -I $(RTEMS_TOPdir)/aclocal
+
+SUBDIRS = include src
+
+include $(top_srcdir)/../../../automake/subdirs.am
+include $(top_srcdir)/../../../automake/local.am
diff --git a/c/src/librpc/configure.in b/c/src/librpc/configure.in
new file mode 100644
index 0000000000..dc3980fe45
--- /dev/null
+++ b/c/src/librpc/configure.in
@@ -0,0 +1,43 @@
+dnl Process this file with autoconf to produce a configure script.
+dnl
+dnl $Id$
+
+AC_PREREQ(2.13)
+AC_INIT(include/rpc)
+RTEMS_TOP(../../..)
+AC_CONFIG_AUX_DIR(../../..)
+
+RTEMS_CANONICAL_TARGET_CPU
+RTEMS_CANONICAL_HOST
+
+AM_INIT_AUTOMAKE(rtems-c-src-librpc,$RTEMS_VERSION,no)
+AM_MAINTAINER_MODE
+
+RTEMS_ENABLE_NETWORKING
+RTEMS_ENABLE_LIBCDIR
+RTEMS_ENABLE_BARE
+
+RTEMS_ENV_RTEMSBSP
+RTEMS_CHECK_CPU
+RTEMS_CHECK_CUSTOM_BSP(RTEMS_BSP)
+
+dnl check target cc
+RTEMS_PROG_CC_FOR_TARGET
+RTEMS_CANONICALIZE_TOOLS
+
+RTEMS_CHECK_NETWORKING(RTEMS_BSP)
+
+AM_CONDITIONAL(HAS_NETWORKING,test "$HAS_NETWORKING" = "yes")
+
+PROJECT_INCLUDE="\$(PROJECT_ROOT)/$RTEMS_BSP/lib/include"
+AC_SUBST(PROJECT_INCLUDE)
+
+RTEMS_PROJECT_ROOT
+
+# try to explicitly list a Makefile here 
+AC_OUTPUT( 
+Makefile
+include/Makefile
+include/rpc/Makefile
+src/Makefile
+)
diff --git a/c/src/librpc/include/Makefile.am b/c/src/librpc/include/Makefile.am
new file mode 100644
index 0000000000..d5385c1f70
--- /dev/null
+++ b/c/src/librpc/include/Makefile.am
@@ -0,0 +1,10 @@
+##
+## $Id$
+##
+
+AUTOMAKE_OPTIONS = foreign 1.4
+
+SUBDIRS = rpc
+
+include $(top_srcdir)/../../../automake/subdirs.am
+include $(top_srcdir)/../../../automake/local.am