pg gem无法安装 [英] pg gem fails to install

问题描述

我想使Rails使用Cygwin使用heroku但我遇到问题，当我做

  bundle安装
  

我确定postgres已经安装Cygwin的setup.exe但遇到了问题

  gem install pg 
  pre> 
 
 
，我不能理解错误消息。
 
 
 
如果这个问题很琐碎， ;这是我第一次尝试学习RoR，错误日志如下：先感谢！
  / usr / bin / ruby​​。 exe extconf.rb 
检查pg_config ... yes 
使用/ usr / bin / pg_config中的配置值
检查libpq-fe.h ...是
检查libpq / libpq-fs.h ...是
检查pg_config_manual.h ...是
检查pqconnectdb（）在-lpq ...是
检查PQconnectionUsedPassword（）。 ..没有
检查PQisthreadsafe（）...是
检查PQprepare（）...是
检查PQexecParams（）...是
检查PQescapeString ）...是
检查PQescapeStringConn（）...是
检查PQgetCancel（）...是
检查lo_create（）...是
检查pg_encoding_to_char（）...是
检查pg_char_to_encoding（）...是
检查PQsetClientEncoding（）...是
检查rb_encdb_alias（）... no 
检查rb_enc_alias（）... no 
检查libpq-fe.h中的struct pgNotify.extra ...是
检查unistd.h ...是
检查ruby / st.h ... no 
检查st.h ...是
创建extconf.h 
创建Makefile 
 
 make 
 gcc -I 。 -一世。 -I / usr / lib / ruby​​ / 1.8 / i386-cygwin -I。 -DRUBY_EXTCONF_H = \extconf.h\-I / us / include -g -O2 -pipe -fno-strict-aliasing -c pg.c 
 gcc -I。 -一世。 -I / usr / lib / ruby​​ / 1.8 / i386-cygwin -I。 -DRUBY_EXTCONF_H = \extconf.h\-I / usr / include -g -O2 -pipe -fno-strict-aliasing -c pg_connection.c 
 gcc -I。 -一世。 -I / usr / lib / ruby​​ / 1.8 / i386-cygwin -I。 -DRUBY_EXTCONF_H = \extconf.h\-I / usr / include -g -O2 -pipe -fno-strict-aliasing -c pg_result.c 
 gcc -shared -s -o pg_ext.so pg .o pg_connection.o pg_result.o -L。 -L / usr / lib -L。 -L / usr / lib -Wl， -  enable-auto-image-base， -  enable-auto-import， -  export-all -lruby -lpq -lrt -ldl -lcrypt 
 pg_connection.o：在函数pgconn_connection_needs_password中：
 /usr/lib/ruby/gems/1.8/gems/pg-0.13.1/ext/pg_connection.c:714：未定义引用`_PQconnectionNeedsPassword'
 pg_connection.o ：在函数'pgconn_connection_used_pa​​ssword'中：
 /usr/lib/ruby/gems/1.8/gems/pg-0.13.1/ext/pg_connection.c:727：未定义引用`_PQconnectionUsedPassword'
 pg_connection。 o：在函数pgconn_lotruncate中：
 /usr/lib/ruby/gems/1.8/gems/pg-0.13.1/ext/pg_connection.c:2991：未定义对`_lo_truncate的引用
 collect2 ：ld返回1退出状态
 Makefile：152：目标`pg_ext.so'的配方失败
 make：*** [pg_ext.so]错误1 
  
 
 
解决方案
版本0.13的gem不支持版本低于8.3的PostgreSQL。您需要升级Postgres或安装旧的gem（例如 gem install pg -v'< 0.13'）。
 
 
 
pggem遵循 PostgreSQL的版本控制政策。
 
I'm trying to get Rails working with Cygwin using heroku but I'm running into problem when I do 
bundle install
I'm pretty sure postgres is installed (I installed everything with 'postgres' in its title from Cygwin's setup.exe but am running into problems with
gem install pg
, and I can't make sense of the error messages. 

Apologies if this problem is trivial; it's my first time trying to learn RoR. Error log is below. Thanks in advance!
/usr/bin/ruby.exe extconf.rb
checking for pg_config... yes
Using config values from /usr/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... yes
checking for PQconnectionUsedPassword()... no
checking for PQisthreadsafe()... yes
checking for PQprepare()... yes
checking for PQexecParams()... yes
checking for PQescapeString()... yes
checking for PQescapeStringConn()... yes
checking for PQgetCancel()... yes
checking for lo_create()... yes
checking for pg_encoding_to_char()... yes
checking for pg_char_to_encoding()... yes
checking for PQsetClientEncoding()... yes
checking for rb_encdb_alias()... no
checking for rb_enc_alias()... no
checking for struct pgNotify.extra in libpq-fe.h... yes
checking for unistd.h... yes
checking for ruby/st.h... no
checking for st.h... yes
creating extconf.h
creating Makefile

make
gcc -I. -I. -I/usr/lib/ruby/1.8/i386-cygwin -I. -DRUBY_EXTCONF_H=\"extconf.h\"    -I/us /include -g -O2 -pipe  -fno-strict-aliasing    -c pg.c
gcc -I. -I. -I/usr/lib/ruby/1.8/i386-cygwin -I. -DRUBY_EXTCONF_H=\"extconf.h\"    -I/usr/include -g -O2 -pipe  -fno-strict-aliasing    -c pg_connection.c
gcc -I. -I. -I/usr/lib/ruby/1.8/i386-cygwin -I. -DRUBY_EXTCONF_H=\"extconf.h\"    -I/usr/include -g -O2 -pipe  -fno-strict-aliasing    -c pg_result.c
gcc -shared -s -o pg_ext.so pg.o pg_connection.o pg_result.o -L. -L/usr/lib -L.  -L/usr/lib -Wl,--enable-auto-image-base,--enable-auto-import,--export-all   -lruby -lpq  -lrt -ldl -lcrypt  
pg_connection.o: In function 'pgconn_connection_needs_password':
/usr/lib/ruby/gems/1.8/gems/pg-0.13.1/ext/pg_connection.c:714: undefined reference to `_PQconnectionNeedsPassword'
pg_connection.o: In function 'pgconn_connection_used_password':
/usr/lib/ruby/gems/1.8/gems/pg-0.13.1/ext/pg_connection.c:727: undefined reference to `_PQconnectionUsedPassword'
pg_connection.o: In function 'pgconn_lotruncate':
/usr/lib/ruby/gems/1.8/gems/pg-0.13.1/ext/pg_connection.c:2991: undefined reference to `_lo_truncate'
collect2: ld returned 1 exit status
Makefile:152: recipe for target `pg_ext.so' failed
make: *** [pg_ext.so] Error 1

解决方案
Version 0.13 of the gem doesn't support versions of PostgreSQL older than 8.3. You'll either need to upgrade your Postgres or install an older gem (e.g., gem install pg -v '< 0.13').

The 'pg' gem follows PostgreSQL's versioning policy.

                        
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