我使用XAMPP作为PostgreSQL 9.3的安装文件夹。
C：\ XAMPP \ pgsql的\ 9.3
现在我正在尝试使用该目录安装PostgreSQL gem作为参考：
gem install pg -- --with-pg-include="C:\xampp\pgsql\9.3\include" --with-pg-lib="C:\xampp\pgsql\9.3\lib" --with-pg-config="C:\xampp\pgsql\9.3\bin\pg_config" 但是这个命令失败，错误如下：
ERROR: Error installing pg: ERROR: Failed to build gem native extension. C:/Ruby/Ruby200/bin/ruby.exe extconf.rb --with-pg-include=C:\xampp\pgsql\9.3 \include --with-pg-lib=C:\xampp\pgsql\9.3\lib --with-pg-config=C:\xampp\pgsql\9. 3\bin\pg_config Using config values from C:\xampp\pgsql\9.3\bin\pg_config 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 Cant 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:/Ruby/Ruby200/bin/ruby --with-pg --without-pg --with-pg-config --with-pg-dir --without-pg-dir --with-pg-include=${pg-dir}/include --with-pg-lib=${pg-dir}/ --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:/Ruby/Ruby200/lib/ruby/gems/2.0.0/gems/pg-0 .17.1 for inspection. Results logged to C:/Ruby/Ruby200/lib/ruby/gems/2.0.0/extensions/x86-mingw32/2.0 .0/pg-0.17.1/gem_make.out
当我检查里面的pgsql，实际上有一个名为libpq.dll里面的文件
C：\ XAMPP \ pgsql的\ 9.3 \ lib中
那么为什么错误说它找不到PostgreSQL客户端库（libpq）？
有没有解决这个错误？
仅供参考，我正在使用：
我试图安装PG Gem版本0.17.1
作为评论的后续，看起来你必须在Windows上使用32-bit Postgres。
这很可能与pg gem和mingw32 ，尽管我不完全确定