W.Siebert@t-systems.com writes:
Header files are present: # find / -name "ssl.h" /usr/include/openssl/ssl.h ./configure CPPFLAGS="-I/usr/include -I/usr/include/openssl/"
Try without these -I flags. /usr/include is default, but gcc has some special header files elsewhere. Maybe it gets confused if you make /usr/include override these.
If that does not help:
checking openssl/ssl.h usability... no
Look for openssl/ssl.h in config.log to see what happened.