Ive read this article Compiling Stunnel 4.21 on Solaris 10 http://stunnel.mirt.net/pipermail/stunnel-users/2008-March/001895.html

I've been also experiencing this kind of problem but I've Compiled Stunnel 4.25 with OpenSSL 0.9.8h on Solaris 10.

Configure: # ./configure --prefix=/usr/local/stunnel-4.25 --with-ssl=/usr/local/openssl-0.9.8h

configure: **************************************** success

Make Error: gcc -g -O2 -Wall -Wshadow -Wcast-align -Wpointer-arith -I/usr/local/openssl-0.9.8h/include -o stunnel file.o client.o log.o options.o protocol.o network.o resolver.o ssl.o ctx.o verify.o sthreads.o stunnel.o pty.o libwrap.o -lz -ldl -lsocket -lnsl -lpthread -L/usr/local/openssl-0.9.8h/lib -lssl -lcrypto -lwrap

Undefined first referenced symbol in file BIO_set_flags protocol.o SSL_CTX_set_info_callback ctx.o ld: fatal: Symbol referencing errors. No output written to stunnel

My Question is: 1. Should I need to upgrade OpenSSL 0.9.8h into OpenSSL 0.9.8i?

2. I have installed openssl 0.9.8h on Solaris 10 and created several ca certificates. - If I will upgrade OpenSSL 0.9.8h into OpenSSL 0.9.8i, should I also recreate ca certificates?

Any help would be greatly appreciated.