java - 无法在 linux 上安装 rjb1.4.9 指出未设置 java_home

Question

我目前正在开发 elementary 操作系统，无法在 Rails 上进行捆绑安装。问题是无法安装 rjb 1.4.9。虽然它说 Java_Home 未设置，但我可以在路径中找到它。

$JAVA_HOME
bash: /usr/lib/jvm/java-1.8.0-openjdk-amd64/: Is a directory



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

current directory: /var/lib/gems/2.3.0/gems/rjb-1.4.9/ext
/usr/bin/ruby2.3 -r ./siteconf20161026-13902-19etf2h.rb extconf.rb
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details. You may
need configuration options.

Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/usr/bin/$(RUBY_BASE_NAME)2.3
extconf.rb:53:in `<main>': JAVA_HOME is not set. (RuntimeError)

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.3.0/gems/rjb-1.4.9     for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rjb-1.4.9/gem_make.out

Answer 1

尝试更直接的方法，例如:

JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64 gem install rjb

如果您使用的是 csh/tcsh，则可能必须改用 setenv。