[RUBY] Correspondance de l'erreur "ld: bibliothèque introuvable pour -lssl" qui s'est produite lors de l'installation de mysql2 gem

introduction

Il s'agit d'un enregistrement de correspondance sur l'erreur du titre survenue lors de l'installation de mysql2.

environnement

--macOS Catalina version 10.15.7

gem 3.0.3
mysql Ver 14.14 Distrib 5.7.32, for osx10.15 (x86_64) using EditLine wrapper
rbenv 1.1.2
ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin19]
OpenSSL 1.1.1h 22 Sep 2020

un événement

L'erreur suivante s'est produite lors de l'installation de mysql2 gem. Il semble que la cause soit ld: bibliothèque introuvable pour -lssl.

$ gem install mysql2
Building native extensions. This could take a while...
ERROR:  Error installing mysql2:
	ERROR: Failed to build gem native extension.

    current directory: /Users/username/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/mysql2-0.5.3/ext/mysql2
/Users/username/.rbenv/versions/2.6.5/bin/ruby -I /Users/username/.rbenv/versions/2.6.5/lib/ruby/2.6.0 -r ./siteconf20201028-44975-92zd5o.rb extconf.rb
checking for rb_absint_size()... yes
checking for rb_absint_singlebit_p()... yes
checking for rb_wait_for_single_fd()... yes
-----
Using mysql_config at /usr/local/opt/[email protected]/bin/mysql_config
-----
checking for mysql.h... yes
checking for errmsg.h... yes
checking for SSL_MODE_DISABLED in mysql.h... yes
checking for SSL_MODE_PREFERRED in mysql.h... yes
checking for SSL_MODE_REQUIRED in mysql.h... yes
checking for SSL_MODE_VERIFY_CA in mysql.h... yes
checking for SSL_MODE_VERIFY_IDENTITY in mysql.h... yes
checking for MYSQL.net.vio in mysql.h... yes
checking for MYSQL.net.pvio in mysql.h... no
checking for MYSQL_ENABLE_CLEARTEXT_PLUGIN in mysql.h... yes
checking for SERVER_QUERY_NO_GOOD_INDEX_USED in mysql.h... yes
checking for SERVER_QUERY_NO_INDEX_USED in mysql.h... yes
checking for SERVER_QUERY_WAS_SLOW in mysql.h... yes
checking for MYSQL_OPTION_MULTI_STATEMENTS_ON in mysql.h... yes
checking for MYSQL_OPTION_MULTI_STATEMENTS_OFF in mysql.h... yes
checking for my_bool in mysql.h... yes
-----
Don't know how to set rpath on your system, if MySQL libraries are not in path mysql2 may not load
-----
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Setting libpath to /usr/local/opt/[email protected]/lib
-----
creating Makefile

current directory: /Users/username/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/mysql2-0.5.3/ext/mysql2
make "DESTDIR=" clean

current directory: /Users/username/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/mysql2-0.5.3/ext/mysql2
make "DESTDIR="
compiling client.c
compiling infile.c
compiling mysql2_ext.c
compiling result.c
compiling statement.c
linking shared-object mysql2/mysql2.bundle
ld: library not found for -lssl
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [mysql2.bundle] Error 1

make failed, exit code 2

Gem files will remain installed in /Users/username/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/mysql2-0.5.3 for inspection.
Results logged to /Users/username/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/extensions/x86_64-darwin-19/2.6.0/mysql2-0.5.3/gem_make.out

Cause

ld: library not found for -lssl a recherché la plage de recherche de la bibliothèque (l'emplacement spécifié par Setting libpath to / usr / local / opt / mysql @ 5.7 / lib) mais libsll.dylib Le contenu est que (bibliothèque dynamique OpenSSL) n'a pas pu être trouvée. Je l'ai vérifié, mais je ne l'ai pas trouvé.

$ ls -a /usr/local/opt/[email protected]/lib
.			libmysqlclient.20.dylib	libmysqlclient.dylib	libmysqlservices.a	plugin
..			libmysqlclient.a	libmysqld.a		pkgconfig

Si vous vérifiez les informations d'openssl avec $ brew openssl info,

For compilers to find [email protected] you may need to set:
  export LDFLAGS="-L/usr/local/opt/[email protected]/lib"
  export CPPFLAGS="-I/usr/local/opt/[email protected]/include"

Il a été confirmé que libssl.dylib était stocké dans / usr / local / opt / openssl @ 1.1 / lib.

$ ls -a /usr/local/opt/[email protected]/lib/  
.			engines-1.1		libcrypto.a		libssl.1.1.dylib	libssl.dylib
..			libcrypto.1.1.dylib	libcrypto.dylib		libssl.a		pkgconfig

Solution

L'installation a réussi en ajoutant les options suivantes.

--with-ldflags=\"-L/usr/local/opt/openssl/lib\"
--with-cppflags=\"-I/usr/local/opt/openssl/include\"

 $ gem install mysql2 -- --with-cflags=\"-I/usr/local/opt/openssl/include\" --with-ldflags=\"-L/usr/local/opt/openssl/lib\"
Building native extensions with: '--with-cflags="-I/usr/local/opt/openssl/include" --with-ldflags="-L/usr/local/opt/openssl/lib"'
This could take a while...
Successfully installed mysql2-0.5.3
Parsing documentation for mysql2-0.5.3
Installing ri documentation for mysql2-0.5.3
Done installing documentation for mysql2 after 0 seconds
1 gem installed