It is a correspondence record about the error of the title that occurred when mysql2 was installed.
--macOS Catalina version 10.15.7
The following error occurred when installing mysql2 gem.
The cause seems to be ld: library not found for -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
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Using mysql_config at /usr/local/opt/[email protected]/bin/mysql_config
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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
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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
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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
ld: library not found for -lssl searched the library search range (the location specified by Setting libpath to /usr/local/opt/[email protected]/lib) but libsll.dylib The content is that (OpenSSL dynamic library) could not be found.
I actually checked it, but I couldn't find it.
$ ls -a /usr/local/opt/[email protected]/lib
. libmysqlclient.20.dylib libmysqlclient.dylib libmysqlservices.a plugin
.. libmysqlclient.a libmysqld.a pkgconfig
If you check the openssl information with $ 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"
It was confirmed that libssl.dylib was stored in /usr/local/opt/[email protected]/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
The installation was successful by adding the following options.
--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
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