Re^2: Running remote commands (Net::SSH2)

Hi and thanks for your response. Here's what I've got

> uname -a
Linux 2.4.21-37.ELsmp #1 SMP Wed Sep 7 13:28:55 EDT 2005 i686 i686 i386 GNU/Linux

1. Downloaded Net-SSH2-0.28 from CPAN (has dependencies on openssl and libssh
2. Downloaded and installed openssl-0.9.8l from http://www.openssl.org. All worked OK
3. Downloaded libssh2-1.2.2 from http://www.libssh2.org/
4. Untarred and then:

./configure --with-libssl-prefix=/usr/local/ssl (seemed to go through fine)
make

This is where it goes wrong. It runs through and exits with this:

/bin/sh ../../libtool --tag=CC --mode=link gcc -g -O2 -o ssh2 ssh2.o ../../src/libssh2.la
libtool: link: gcc -g -O2 -o .libs/ssh2 ssh2.o ../../src/.libs/libssh2.so -L/usr/local/ssl/lib -lssl -lcrypto -lz -Wl,-rpath -Wl,/usr/local/lib
../../src/.libs/libssh2.so: undefined reference to `dlerror'
../../src/.libs/libssh2.so: undefined reference to `dlclose'
../../src/.libs/libssh2.so: undefined reference to `dlopen'
../../src/.libs/libssh2.so: undefined reference to `dlsym'
collect2: ld returned 1 exit status
make2: *** ssh2 Error 1
make2: Leaving directory `/tmp/libssh2-1.2.2/example/simple'
make1: *** all-recursive Error 1
make1: Leaving directory `/tmp/libssh2-1.2.2/example'
make: *** all-recursive Error 1
Any guidance greatly appreciated. John

Comment on Re^2: Running remote commands (Net::SSH2)

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Re^3: Running remote commands (Net::SSH2) by almut (Canon) on Dec 22, 2009 at 14:40 UTC
/bin/sh ../../libtool --tag=CC --mode=link gcc -g -O2 -o ssh2 ssh2 +.o ../../src/libssh2.la libtool: link: gcc -g -O2 -o .libs/ssh2 ssh2.o ../../src/.libs/libssh +2.so -L/usr/local/ssl/lib -lssl -lcrypto -lz -Wl,-rpath -Wl,/usr/loca +l/lib ../../src/.libs/libssh2.so: undefined reference to `dlerror' ../../src/.libs/libssh2.so: undefined reference to `dlclose' ../../src/.libs/libssh2.so: undefined reference to `dlopen' ../../src/.libs/libssh2.so: undefined reference to `dlsym' [download] Looks like a problem with `libdl` not having been found during `./configure`, so that the required `-ldl` is missing from the link command (the `dl` library implements `dlopen` etc. which are used for run-time dynamic linking of shared libs). Maybe check if you actually have the lib (would typically be in `/lib` or `/lib64` or `/usr/lib` or `/usr/lib64`, e.g. `/lib/libdl.so.2`) what the configure output has to say (--> `"checking for dlopen ..."`, or some such) if the link command succeeds if you manually issue it with `-ldl` added (from the directory where `ssh2.o` is), i.e. `$ gcc -g -O2 -o .libs/ssh2 ssh2.o ../../src/.libs/libssh2.so -L/usr/l +ocal/ssl/lib -ldl -lssl -lcrypto -lz -Wl,-rpath -Wl,/usr/local/lib` [download]	[reply] [d/l] [select]
Re^3: Running remote commands (Net::SSH2) by Verillion (Initiate) on Dec 22, 2009 at 14:32 UTC
From the output it looks like it's missing the -ldl flag, pulling in the dynamic linker lib. Could try that command with -ldl and see what you get. Looks like it should work after that to me.	[reply]
Re^4: Running remote commands (Net::SSH2) by wilko (Acolyte) on Dec 22, 2009 at 14:41 UTC
you mean on the ./configure part? tried that but it complained with error: unrecognized option: `-ldl'	[reply]