gem install cannot find a header file

Question

Following along the github README for talib_ruby:

sudo port install ta-lib

Complete. Next is where the trouble begins.

sudo         


        

Answer 1

Observe

sudo echo $ABSOLUTE_PATH_TO_TALIB_HEADERS

echo ABSOLUTE_PATH_TO_TALIB_HEADERS

have included in **my** .bash_profile file the following:

sudo

Are you root?

put the env vars on the command line and you should be good, alternatively add them to root's env.

Answer 2

Just adding an answer for brew installed ta-lib.

env ARCHFLAGS="-arch x86_64" gem install talib_ruby -- --with-talib-include=/usr/local/include/ta-lib --with-talib-lib=/usr/local/lib

Answer 3

The answer to this question was answered by the gem author via email, but I'd like to share the solution.

sudo env ARCHFLAGS="-arch x86_64" gem install talib_ruby -- --with-talib-include=/opt/local/var/macports/software/ta-lib/0.4.0_0/opt/local/include/ta-lib  --with-talib-lib=/opt/local/var/macports/software/ta-lib/0.4.0_0/opt/local/lib

It is important to note that this gem is also not compatible with Ruby 1.9.2. From what the error list generated, it had some issues with the definition of struct RObject (fill in Object with String, Array, etc), which I traced to the ruby.h header file. If you'd like to use this gem, you can install rvm and then type

rvm install ruby-1.8.7 --with-readline-dir=/opt/local

From there, simply follow the guidance from the gem author with the input listed above.

UPDATE: the gem author has made talib_ruby compatible with 1.9.x so there is no longer a need to install 1.8.7