Unable to compile xinetd on Slackware 15.0

HytronBG · 10-18-2023, 09:00 AM

I have been using xinetd (Version 2.3.15 is the last one available) for years and now that I have upgraded from Linux Slackware 14.2 to 15.0 it fails to compile:

gcc -g -O2 -I../libs/include -c -o reconfig.o reconfig.c
reconfig.c:30:11: fatal error: rpc/rpc.h: No such file or directory
30 | #include <rpc/rpc.h>
| ^~~~~~~~~~~
compilation terminated.

Doing some research it appears that rpc.h was moved from:

/usr/include/rpc/rpc.h <- Old Slackware 14.2

which was part of glibc-2.17 to the new package which is now called libtirpc-1.3.2 and is located here:

/usr/include/tirpc/rpc/rpc.h <- Slackware 15.0

So I included the:

CFLAGS=-I/usr/include/tirpc

to my ./configure script and now I am able to compile but the linking fails with the following error:

/usr/bin/ld: reconfig.o: undefined reference to symbol 'pmap_unset@@TIRPC_0.3.0'
/usr/bin/ld: /lib64/libtirpc.so.3: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

Is someone able to help me fix this issue?

TIA!!!

business_kid · 10-18-2023, 11:34 AM

Quote:

Originally Posted by HytronBG

/usr/bin/ld: reconfig.o: undefined reference to symbol 'pmap_unset@@TIRPC_0.3.0'
/usr/bin/ld: /lib64/libtirpc.so.3: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

"Undefined reference" errors are usually outdated libraries. Are you compiling old code here, or is there stuff from 14.2 lying about?

HytronBG · 10-18-2023, 12:46 PM

Quote:

Originally Posted by business_kid

"Undefined reference" errors are usually outdated libraries. Are you compiling old code here, or is there stuff from 14.2 lying about?

Linux installation (15.0) is new with all current updates. The xinetd was last updated in 2012 and it probably has reference to some older libraries or libraries that have changed names.

jayjwa · 10-18-2023, 12:48 PM

Code:

./configure --prefix=/usr --with-loadavg --with-inet6 --with-libwrap --with-labeled-networking

Now open the Makefile and find the CFLAGS line. Add the path to TIRPC, -I/usr/include/tirpc on my system. Find the LIBS line and add -ltirpc at the end. Do the same with LIBS in the Makefile in xinetd/xinetd subdir. Why it doesn't pick up LIBS from the master Makefile I don't know. Compile.

Code:

jayjwa@atr2 ~/xinetd (master)> file xinetd/xinetd
xinetd/xinetd: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, with debug_info, not stripped

jayjwa@atr2 ~/xinetd (master)> xinetd/xinetd -version
xinetd Version 2.3.15 libwrap loadavg

It builds but I didn't test it as I already have it installed from before. Slackware current, https://github.com/xinetd-org/xinetd
For such an integral part of Linux, I have no idea why this isn't maintained better.

HytronBG · 10-19-2023, 01:43 PM

Quote:

Originally Posted by jayjwa

Code:

./configure --prefix=/usr --with-loadavg --with-inet6 --with-libwrap --with-labeled-networking

Now open the Makefile and find the CFLAGS line. Add the path to TIRPC, -I/usr/include/tirpc on my system. Find the LIBS line and add -ltirpc at the end. Do the same with LIBS in the Makefile in xinetd/xinetd subdir. Why it doesn't pick up LIBS from the master Makefile I don't know. Compile.

Code:

jayjwa@atr2 ~/xinetd (master)> file xinetd/xinetd
xinetd/xinetd: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, with debug_info, not stripped

jayjwa@atr2 ~/xinetd (master)> xinetd/xinetd -version
xinetd Version 2.3.15 libwrap loadavg

It builds but I didn't test it as I already have it installed from before. Slackware current, https://github.com/xinetd-org/xinetd
For such an integral part of Linux, I have no idea why this isn't maintained better.

Thats it! I tried what you suggested and it worked!! Looks like "-ltirpc" was missing from the LIBS. When you mentioned the option "-ltirpc" that needs to be added to the LIBS variable, I also tried compiling with:

CFLAGS=-I/usr/include/tirpc \
LIBS=-ltirpc \
./configure \
--prefix=/usr \
--sysconfdir=/etc \
--localstatedir=/var/run \
--with-libwrap \
--with-inet6 \
--with-loadavg \
--with-labeled-networking

And it works as well! Thank you much for your help!!! I appreciate it!!