如何安装json gem – 无法构建gem原生扩展
我正在尝试将rails应用程序部署到我的ubuntu linux服务器上。 我正在使用capistrano和bundler，当它安装gem时，它失败并出现此错误：
Installing json (1.7.7) with native extensions Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /opt/ruby-enterprise-1.8.7-2012.02/bin/ruby extconf.rb creating Makefile make /usr/bin/gcc -I. -I/opt/local/include -I/opt/ruby-enterprise-1.8.7- 2012.02/lib/ruby/1.8/i686-linux -I/opt/ruby-enterprise-1.8.7-2012.02/lib/ruby/1.8/i686-linux -I. -D_FILE_OFFSET_BITS=64 -fPIC -g -O3 -Wall -c parser.c In file included from /usr/include/i386-linux-gnu/bits/posix1_lim.h:157:0, from /usr/include/limits.h:145, from /usr/lib/gcc/i686-linux-gnu/4.6/include-fixed/limits.h:169, from /usr/lib/gcc/i686-linux-gnu/4.6/include-fixed/syslimits.h:7, from /usr/lib/gcc/i686-linux-gnu/4.6/include-fixed/limits.h:34, from /opt/ruby-enterprise-1.8.7-2012.02/lib/ruby/1.8/i686-linux/ruby.h:95, from ../fbuffer/fbuffer.h:6, from parser.rl:1: /usr/include/i386-linux-gnu/bits/local_lim.h:39:26: fatal error: linux/limits.h: No such file or directory compilation terminated. make: *** [parser.o] Error 1 我正在运行ruby企业版1.8.7并且无法在没有大量工作升级其他站点的情况下升级ruby，因此现在不能选择。 我尝试了apt-get install ruby-dev但它没有帮助（我不确定这是正确的事情）。
我想你需要安装其中一个包：
$ apt-file search limits.h | grep 'linux/limits.h' linux-headers-2.6.32-5-common: /usr/src/linux-headers-2.6.32-5-common/include/linux/limits.h linux-headers-2.6.32-5-common-openvz: /usr/src/linux-headers-2.6.32-5-common-openvz/include/linux/limits.h linux-headers-2.6.32-5-common-vserver: /usr/src/linux-headers-2.6.32-5-common-vserver/include/linux/limits.h linux-headers-2.6.32-5-common-xen: /usr/src/linux-headers-2.6.32-5-common-xen/include/linux/limits.h linux-libc-dev: /usr/include/linux/limits.h