无法在 Windows 中安装 pg gem

Question

在 Windows 中安装 pg gem 时出现以下错误。 使用的命令： $ gem install pg -- -- with-pg=S:

****输出：****

Building native extensions with: '-- with-pg=S:'
This could take a while...
ERROR:  Error installing pg:
        ERROR: Failed to build gem native extension.

    c:/RailsInstaller/Ruby2.1.0/bin/ruby.exe extconf.rb -- with-pg=S:
checking for pg_config... yes
Using config values from S:/bin/pg_config.exe
checking for libpq-fe.h... yes
checking for libpq/libpq-fs.h... yes
checking for pg_config_manual.h... yes
checking for PQconnectdb() in -lpq... no
checking for PQconnectdb() in -llibpq... no
checking for PQconnectdb() in -lms/libpq... no
Can't find the PostgreSQL client library (libpq)
*** 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=c:/RailsInstaller/Ruby2.1.0/bin/ruby
        --with-pg
        --enable-windows-cross
        --disable-windows-cross
        --with-pg-config
        --without-pg-config
        --with-pg_config
        --without-pg_config
        --with-pg-dir
        --without-pg-dir
        --with-pg-include
        --without-pg-include=${pg-dir}/include
        --with-pg-lib
        --without-pg-lib=${pg-dir}/lib
        --with-pqlib
        --without-pqlib
        --with-libpqlib
        --without-libpqlib
        --with-ms/libpqlib
        --without-ms/libpqlib

extconf failed, exit code 1

Gem files will remain installed in c:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1
.0/gems/pg-0.18.4 for inspection.
Results logged to c:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/extensions/x86
-mingw32/2.1.0/pg-0.18.4/gem_make.out

通过谷歌搜索，我发现我们应该安装“apt-get install libpq-dev”。谁能告诉我如何在 Windows 机器上做到这一点。

如果我尝试“gem install libpq-dev”，我会遇到以下错误。

错误：在任何存储库中都找不到有效的 gem 'libpq-dev' (>= 0) 错误：可能的替代品：libevdev、libpixel

Answer 1

谁能告诉我如何在windows机器上做到这一点。

Windows 不会将库视为与 Linux / Mac 相同；没有像 apt-get 或 brew 这样的存储库（尽管 chocolatey 正在开发中）...您必须自己下载库并直接引用它们...

Download the PGSQL binary: http://www.enterprisedb.com/products-services-training/pgbindownload

gem install pg -- --with-pg-dir="C:\Path\To\PostgreSQL\9.5"

Very good resource

Answer 2

试试这个会起作用

sudo apt-get install -y libpq-dev build-essential postgresql-server-dev-all libpgsql-ruby postgresql ruby-dev && gem install pg