ruby on rails - pg gem '0.14.0' on Mountain Lion fails

Question

I just upgraded from OS X Lion to OS X Mountain Lion. My rails environment for the most part stayed in tact.

The only steps I had to do to get things back to a good state was: - Install XCode 4.4 - Install XCode 4.4 Command Line Tools - Install gcc-4.2

So all that went well.

Here's the issue, almost all my gems install properly when I run bundle install except for one of the most important ones I need - the postgresql gem 'pg'.

And it specifically fails for versions above 0.12.2.

I'm using ruby 1.9.3p125.

I can successfully grab the 0.12.2 pg gem, and versions below, but they give me segmentation faults (I'm guessing because of the version of ruby I'm using).

So this leads me to believe that it's specific to the pg gem, and not my overall environment seeing as other gems install fine.

I also tried re-installing Postgresql to ensure my postgres environment is ok and seems good on that front.

Has anybody been able to install the 'pg' gem version 0.13.0 or above (and more preferrably 0.14.X)?

Here is my stack trace:

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

    /Users/caseyli/.rvm/rubies/ruby-1.9.3-p125/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 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 ‘pg_s_library_version’:
pg.c:273: warning: implicit declaration of function ‘PQlibVersion’
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 /Users/caseyli/.rvm/gems/ruby-1.9.3-        p125@elliottfarmequipment/gems/pg-0.14.0 for inspection.

Answer 1

Deefour's comment got it! It was the way I installed PostgreSQL.

I use the PostgreSQL one-click installer which I'm guessing doesn't set up the libpq up properly for Mountain Lion.

Homebrew on the otherhand will build it properly for the OS.

After installing postgres through homebrew

brew install postgresql

I was able to install my gem no problem.

Thanks everybody!