Hello,
I’m trying to install the ruby pg gem and I had this exact problem on my mac because of 64 bit architecture. The solution was something like “sudo env ARCHFLAGS=”-arch x86_64" gem install pg" (http://stackoverflow.com/questions/10344821/gem-install-pg-doesnt-work-on-osx-lion). I suspect it is the same problem since my server is running Ubuntu 12.04 x64.
The command “gem install pg” doesn’t work and gives me the following error: <pre> Fetching: pg-0.17.0.gem (100%) Building native extensions. This could take a while… ERROR: Error installing pg: ERROR: Failed to build gem native extension.
/usr/local/rvm/rubies/ruby-2.0.0-p247/bin/ruby extconf.rb
checking for pg_config… yes Using config values from /usr/bin/pg_config You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application. You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application. checking for libpq-fe.h… no Can’t find the 'libpq-fe.h header *** 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. </pre> As a warning, I am a straight up noob at this stuff.
Any thoughts?
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After a day fighting, I found out through the mkmf.log that the command “ld -lgmp” was failing. So I installed the libgmp-dev package and now it works.
found a solution: <br> <br>use these commands http://stackoverflow.com/questions/4564117/sudo-gem-install-pg-wont-work <br> <br>then ‘gem install pg should work’
On Ubuntu $ sudo apt-get install postgresql-client libpq5 libpq-dev $ sudo gem install pg
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