Installing Ruby 2.3.x on Ubuntu 18.04 is causing an error by the end of the installation process : <p>I recently updated my system to Ubuntu 18.04 LTS, and since then, the Ruby version seems to have updated to 2.5. The issue is that, when attempting to deploy a project that uses Capistrano, it will now complain that Ruby 2.3 was not found.</p>

<p>The version it tries to install when running <code>rvm install 2.3</code> is 2.3.4, and the first error that is shown is "<code>Error running '__rvm_make -j4'</code>". I tried removing RVM and installing again, but nothing solves this. The log is an enormous file which tells me nothing.</p>

<p>Then, I tried using <code>rbenv</code>, which also causes an error:</p>

<pre><code>Installing ruby-2.3.4...

BUILD FAILED (Ubuntu 18.04 using ruby-build 20180424)

Inspect or clean up the working tree at /tmp/ruby-build.20180429172721.16258
Results logged to /tmp/ruby-build.20180429172721.16258.log

Last 10 log lines:
installing default nkf libraries
linking shared-object objspace.so
make[2]: Leaving directory '/tmp/ruby-build.20180429172721.16258/ruby-2.3.4/ext/objspace'
linking shared-object pathname.so
make[2]: Leaving directory '/tmp/ruby-build.20180429172721.16258/ruby-2.3.4/ext/pathname'
linking shared-object nkf.so
make[2]: Leaving directory '/tmp/ruby-build.20180429172721.16258/ruby-2.3.4/ext/nkf'
make[1]: Leaving directory '/tmp/ruby-build.20180429172721.16258/ruby-2.3.4'
uncommon.mk:203: recipe for target 'build-ext' failed
make: *** [build-ext] Error 2
</code></pre>

<p>The log file also has a stupid giant log file.</p>

<p>The next attempt was to install from source, which after running <code>make</code> within the folder, the error:</p>

<pre><code>openssl_missing.h:78:35: error: macro "EVP_MD_CTX_create" passed 1 arguments, but takes just 0
 EVP_MD_CTX *EVP_MD_CTX_create(void);
                                   ^
In file included from /usr/include/openssl/x509.h:23:0,
                 from /usr/include/openssl/x509_vfy.h:17,
                 from openssl_missing.c:15:
openssl_missing.h:82:6: error: expected declaration specifiers or ‘...’ before ‘(’ token
 void EVP_MD_CTX_init(EVP_MD_CTX *ctx);
      ^
openssl_missing.h:90:6: error: expected declaration specifiers or ‘...’ before ‘(’ token
 void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx);
      ^
openssl_missing.c:39:23: error: macro "EVP_MD_CTX_create" passed 1 arguments, but takes just 0
 EVP_MD_CTX_create(void)
                       ^
openssl_missing.c:40:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
openssl_missing.c: In function ‘EVP_MD_CTX_cleanup’:
openssl_missing.c:55:27: error: invalid application of ‘sizeof’ to incomplete type ‘EVP_MD_CTX {aka struct evp_md_ctx_st}’
     memset(ctx, 0, sizeof(EVP_MD_CTX));
                           ^~~~~~~~~~
In file included from /usr/include/openssl/x509.h:23:0,
                 from /usr/include/openssl/x509_vfy.h:17,
                 from openssl_missing.c:15:
openssl_missing.c: At top level:
openssl_missing.c:63:1: error: expected declaration specifiers or ‘...’ before ‘(’ token
 EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
 ^
openssl_missing.c:72:1: error: expected declaration specifiers or ‘...’ before ‘(’ token
 EVP_MD_CTX_init(EVP_MD_CTX *ctx)
 ^
openssl_missing.c: In function ‘HMAC_CTX_init’:
openssl_missing.c:82:25: error: dereferencing pointer to incomplete type ‘HMAC_CTX {aka struct hmac_ctx_st}’
     EVP_MD_CTX_init(&amp;ctx-&gt;i_ctx);
                         ^
openssl_missing.c: In function ‘HMAC_CTX_cleanup’:
openssl_missing.c:95:27: error: invalid application of ‘sizeof’ to incomplete type ‘HMAC_CTX {aka struct hmac_ctx_st}’
     memset(ctx, 0, sizeof(HMAC_CTX));
                           ^~~~~~~~
Makefile:301: recipe for target 'openssl_missing.o' failed
make[2]: *** [openssl_missing.o] Error 1
make[2]: Leaving directory '/home/gabriel/Downloads/ruby-2.3.7/ext/openssl'
exts.mk:212: recipe for target 'ext/openssl/all' failed
make[1]: *** [ext/openssl/all] Error 2
make[1]: Leaving directory '/home/gabriel/Downloads/ruby-2.3.7'
uncommon.mk:203: recipe for target 'build-ext' failed
make: *** [build-ext] Error 2
</code></pre>

<p>What is it there to be done to install it? Or it isn't possible anymore to install these old versions?</p>
