Hi. I'm trying to install TLS 1.7.20 and I can't in any method. I'm tired to try all methods and I can't get a solution. I'm using Centos6 X64. 

checking for path to tclConfig.sh... /usr/lib64/tcl8.6/
checking for runnable tclsh... /usr/bin/tclsh
checking for working tclConfig.sh... found
checking how to create shared objects... -DPIC -fPIC -shared
checking whether C compiler accepts -Wno-unused-value... yes
checking whether C compiler accepts -Wno-unused-parameter... yes
checking whether C compiler accepts -Wno-deprecated-declarations... yes
checking for pkg-config... pkg-config
checking whether C compiler accepts -Wall... yes
checking whether C compiler accepts -W... yes
checking whether C compiler accepts -Wno-self-assign... yes
checking whether C compiler accepts -fstack-protector-all... yes
checking whether C compiler accepts -fno-strict-overflow... yes
checking which TLS library to use... openssl
checking if a basic OpenSSL program works... no
configure: error: Unable to compile a basic program using OpenSSL

I still have this error, and I'm sure OpenSSL is installing and existing on my system.

[root@vps167209 tcltls-1.7.20]# openssl version
OpenSSL 1.0.1e-fips 11 Feb 2013

I also have installed OpenSSL 1.1.1f the latest and it was there too, but still not working. How can I solve this? Please help me. Thank you very much. Any Solution?

This has been corrected with the changes to re-implement the TEA build system.
See [6c02d4d0291e784b] for the complete set of changes.