Ruby - bundle install failing for gems requiring native extensions

[sushmasatish]

Ruby - 2.3.1
Bundler - 1.12.5
bundle install fails for gems like pg, bcrypt.

Failed for gems -

• pg - 0.18.4
• crypt - 3.1.11

[mhart]

Do they have native components that need building?

You need to install gcc for anything that requires native builds: https://github.com/lambci/lambci#native-gcc-compilation

So try:

{
  "cmd": ". ~/init/ruby && . ~/init/gcc && bundle install"
}

[sushmasatish]

Hi @mhart - Thank you for the reply, with gcc, now bcrypt is getting installed but for PG, we would need postgres libs to be installed as well I think.

I am getting the following error:

Installing pg 0.18.4 with native extensions

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /tmp/lambci/home/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/pg-0.18.4/ext
/tmp/lambci/home/.rbenv/versions/2.3.1/bin/ruby -r ./siteconf20160805-204-1ddlwyp.rb extconf.rb
checking for pg_config... no
No pg_config... trying anyway. If building fails, please try again with
 --with-pg-config=/path/to/pg_config
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.

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=/tmp/lambci/home/.rbenv/versions/2.3.1/bin/$(RUBY_BASE_NAME)
    --with-pg
    --without-pg
    --enable-windows-cross
    --disable-windows-cross
    --with-pg-config
    --without-pg-config
    --with-pg_config
    --without-pg_config
    --with-pg-dir
    --without-pg-dir
    --with-pg-include
    --without-pg-include=${pg-dir}/include
    --with-pg-lib
    --without-pg-lib=${pg-dir}/lib

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /tmp/lambci/home/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/extensions/x86_64-linux/2.3.0-static/pg-0.18.4/mkmf.log

extconf failed, exit code 1

[mhart]

Right – as you say, you'll need to find a way of getting the postgres libs onto Lambda as they're not natively installed.

It should be possible, but I don't know enough about installing postgres dev libs/headers into a custom location. At a guess, put any include files (*.h) in $CPATH, any linker files in $LIBRARY_PATH and any dynamic libraries (*.so) can go in either /tmp/lib64 or ~/usr/lib64 as both are added to $LD_LIBRARY_PATH

[mhart]

Going to close this – native extensions can be built, just require some tweaking