Build does not work on Ubuntu18.04 TLS

[danuk]

How to reproduce:

 git clone --recursive https://github.com/vysheng/tg.git && cd tg

./configure
make
.....

tgl/crypto/rsa_pem_openssl.c: In function ‘TGLC_rsa_new’:
tgl/crypto/rsa_pem_openssl.c:41:6: error: dereferencing pointer to incomplete type ‘RSA {aka struct rsa_st}’
   ret->e = unwrap_bn (TGLC_bn_new ());
      ^~
tgl/crypto/rsa_pem_openssl.c: In function ‘TGLC_rsa_n’:
tgl/crypto/rsa_pem_openssl.c:52:1: error: control reaches end of non-void function [-Werror=return-type]
 RSA_GETTER(n);
 ^~~~~~~~~~
tgl/crypto/rsa_pem_openssl.c: In function ‘TGLC_rsa_e’:
tgl/crypto/rsa_pem_openssl.c:53:1: error: control reaches end of non-void function [-Werror=return-type]
 RSA_GETTER(e);
 ^~~~~~~~~~
cc1: all warnings being treated as errors
Makefile.tgl:20: recipe for target 'objs/crypto/rsa_pem_openssl.o' failed
make: *** [objs/crypto/rsa_pem_openssl.o] Error 1

[Paulchen232]

You can try that:
sudo apt-get install libssl1.0-dev

[minzak]

Вот причина и лекарство:
libssl1.0-dev which was present in stretch but is removed from buster !

Create a new source file for stretch in /etc/apt/source.list.d/ and add source for stretch

deb http://deb.debian.org/debian/ stretch main contrib non-free
deb-src http://deb.debian.org/debian stretch main contrib non-free

Create a apt config file under /etc/apt/apt.conf.d and add this line to the file

APT::Default-Release "buster";

https://unix.stackexchange.com/questions/60555/debian-is-it-possible-safe-to-install-packages-from-an-older-version-of-the-rep