postgresql 9.1 - Rails 3 - 無法安裝pg gem

我正在開發一個Rails應用程序，以在Mac OS X上推送到Heroku，當我嘗試運行'gem install pg'時，出現以下錯誤。postgresql 9.1 - Rails 3 - 無法安裝pg gem

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

     /usr/local/rvm/rubies/ruby-1.9.3-p194/bin/ruby 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()... yes 
checking for PQisthreadsafe()... yes 
checking for PQprepare()... yes 
checking for PQexecParams()... yes 
checking for PQescapeString()... yes 
checking for PQescapeStringConn()... yes 
checking for PQescapeLiteral()... yes 
checking for PQescapeIdentifier()... 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 PQlibVersion()... yes 
checking for PQping()... yes 
checking for rb_encdb_alias()... yes 
checking for rb_enc_alias()... no 
checking for PGRES_COPY_BOTH in libpq-fe.h... no 
checking for PGRES_SINGLE_TUPLE in libpq-fe.h... no 
checking for struct pgNotify.extra in libpq-fe.h... yes 
checking for unistd.h... yes 
checking for ruby/st.h... yes 
creating extconf.h 
creating Makefile 

make 
compiling pg.c 
pg.c: In function ‘Init_pg_ext’: 
pg.c:384: error: ‘PQPING_OK’ undeclared (first use in this function) 
pg.c:384: error: (Each undeclared identifier is reported only once 
pg.c:384: error: for each function it appears in.) 
pg.c:386: error: ‘PQPING_REJECT’ undeclared (first use in this function) 
pg.c:388: error: ‘PQPING_NO_RESPONSE’ undeclared (first use in this function) 
pg.c:390: error: ‘PQPING_NO_ATTEMPT’ undeclared (first use in this function) 
make: *** [pg.o] Error 1 


Gem files will remain installed in /usr/local/rvm/gems/ruby-1.9.3-p194/gems/pg-0.14.1 for inspection. 
Results logged to /usr/local/rvm/gems/ruby-1.9.3-p194/gems/pg-0.14.1/ext/gem_make.out

我已經在他們的網站上安裝了使用Mac OS X安裝程序的Postgres。

任何關於如何解決這個問題的幫助將會非常有用！

來源

2013-03-17 Dave Carpenter

卸載剛剛安裝的postgres（從他們的網站），而是用自制軟件安裝：'brew install postgresql'然後再次嘗試安裝pg gem。 – fmendez 2013-03-17 02:52:41

如果您使用Brew安裝Postgres，則不會發生此問題。

來源

2013-03-17 06:28:47

postgresql 9.1 - Rails 3 - 無法安裝pg gem

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