Cannot install Ruby with rbenv 2.3.1 in Ubuntu 16.04 -


while installing ruby rbenv ubuntu 16.04 error regarding ruby build shown. i've tried removing rbenv , again re-installing rbenv, following error.

i've followed digitalocean's procedure installing rbenv in here, , followed steps listed here ruby_build. i've installed dependencies required build.

still after times of uninstall , install of rbenv problem same.

   ~$ rbenv install 2.3.1    downloading ruby-2.3.1.tar.bz2...    -> https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.1.tar.bz2    installing ruby-2.3.1...     build failed (ubuntu 16.04 using ruby-build 20170726-2-g254728e)     inspect or clean working tree @ /tmp/build.20170818162042.1074    results logged /tmp/ruby-build.20170818162042.1074.log     last 10 log lines:    linking shared-object objspace.so    make[2]: leaving directory '/tmp/ruby-build.20170818162042.1074/ruby-2.3.1/ext/objspace'    installing default date_core libraries    linking shared-object date_core.so    make[2]: leaving directory '/tmp/ruby-build.20170818162042.1074/ruby-2.3.1/ext/date'    linking shared-object nkf.so    make[2]: leaving directory '/tmp/ruby-build.20170818162042.1074/ruby-2.3.1/ext/nkf'    make[1]: leaving directory '/tmp/ruby-build.20170818162042.1074/ruby-2.3.1'    uncommon.mk:203: recipe target 'build-ext' failed    make: *** [build-ext] error 2

result of cat /tmp/ruby-build.20170818162042.1074.log

in file included ossl.h:57:0,                  ossl_bn.c:11: /usr/include/openssl/asn1_mac.h:10:2: error: #error "this file obsolete; please update software."  #error "this file obsolete; please update software."   ^ in file included ossl.h:221:0,                  ossl_bn.c:11: openssl_missing.h:78:35: error: macro "evp_md_ctx_create" passed 1 arguments, takes 0  evp_md_ctx *evp_md_ctx_create(void);                                    ^ in file included /usr/include/openssl/x509.h:23:0,                  /usr/include/openssl/x509v3.h:14,                  ossl.h:58,                  ossl_bn.c:11: 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);       ^ ossl_bn.c: in function ‘ossl_bn_size’: ossl_bn.c:43:19: error: invalid application of ‘sizeof’ incomplete type ‘bignum {aka struct bignum_st}’      return sizeof(bignum);                    ^ ossl_bn.c: in function ‘ossl_bn_s_generate_prime’: ossl_bn.c:769:5: warning: ‘bn_generate_prime’ deprecated [-wdeprecated-declarations]      if (!bn_generate_prime(result, num, safe, add, rem, null, null)) {      ^ in file included /usr/include/openssl/bn.h:31:0,                  /usr/include/openssl/asn1.h:24,                  /usr/include/openssl/objects.h:916,                  /usr/include/openssl/evp.h:27,                  /usr/include/openssl/x509.h:23,                  /usr/include/openssl/x509v3.h:14,                  ossl.h:58,                  ossl_bn.c:11: /usr/include/openssl/bn.h:285:1: note: declared here  deprecatedin_0_9_8(bignum *bn_generate_prime(bignum *ret, int bits, int safe,  ^ ossl_bn.c: in function ‘ossl_bn_is_prime’: ossl_bn.c:877:5: warning: ‘bn_is_prime’ deprecated [-wdeprecated-declarations]      switch (bn_is_prime(bn, checks, null, ossl_bn_ctx, null)) {      ^ in file included /usr/include/openssl/bn.h:31:0,                  /usr/include/openssl/asn1.h:24,                  /usr/include/openssl/objects.h:916,                  /usr/include/openssl/evp.h:27,                  /usr/include/openssl/x509.h:23,                  /usr/include/openssl/x509v3.h:14,                  ossl.h:58,                  ossl_bn.c:11: /usr/include/openssl/bn.h:291:1: note: declared here  deprecatedin_0_9_8(int  ^ ossl_bn.c: in function ‘ossl_bn_is_prime_fasttest’: ossl_bn.c:916:5: warning: ‘bn_is_prime_fasttest’ deprecated [-wdeprecated-declarations]      switch (bn_is_prime_fasttest(bn, checks, null, ossl_bn_ctx, null, do_trial_division)) {      ^ in file included /usr/include/openssl/bn.h:31:0,                  /usr/include/openssl/asn1.h:24,                  /usr/include/openssl/objects.h:916,                  /usr/include/openssl/evp.h:27,                  /usr/include/openssl/x509.h:23,                  /usr/include/openssl/x509v3.h:14,                  ossl.h:58,                  ossl_bn.c:11: /usr/include/openssl/bn.h:295:1: note: declared here  deprecatedin_0_9_8(int  ^ ossl_bn.c: in function ‘ossl_bn_size’: ossl_bn.c:44:1: warning: control reaches end of non-void function [-wreturn-type]  }  ^ makefile:301: recipe target 'ossl_bn.o' failed

this known compatibility issue openssl , ruby 2.3.x.

the openssl extension of ruby version before 2.4 not compatible openssl 1.1.x. @ moment, linux distributions come openssl 1.1.0 have separate package openssl 1.0.x.

you need install earlier version of openssl or use ruby 2.4.x.

full description , solution here


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