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How to get ruby to find a native lib?
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Adam Russell
Feb 13, 2012, 11:35:44 AM2/13/12
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I have installed some native libraries. They are in /usr/local/lib.
I am now trying to install a ruby gem which needs these in order to
build correctly but the gem build fails as it cannot find these
libraries.
The gem's extconf.rb file tries to confirm it can find the library with
have_library() but this fails for some reason.
I have tried setting a bunch of environment variables (see below for my
tests in irb) but nothing seems to work.
What is the best way to solve this problem?
irb(main):003:0> require 'mkmf'
=> true
irb(main):004:0> have_library('gecodesearch')
checking for main() in -lgecodesearch... no
=> false
irb(main):005:0> ENV['LD_LIBRARY_PATH']='/usr/local/lib'
=> "/usr/local/lib"
irb(main):006:0> have_library('gecodesearch')
checking for main() in -lgecodesearch... no
=> false
irb(main):007:0> ENV['DYLD_LIBRARY_PATH']='/usr/local/lib'
=> "/usr/local/lib"
irb(main):008:0> have_library('gecodesearch')
checking for main() in -lgecodesearch... no
=> false
irb(main):009:0> have_library('libgecodesearch')
checking for main() in -llibgecodesearch... no
=> false
irb(main):010:0> ENV['C_INCLUDE_PATH']='/usr/local/lib'
=> "/usr/local/lib"
irb(main):011:0> have_library('gecodesearch')
checking for main() in -lgecodesearch... no
=> false
irb(main):012:0> ENV['PATH']='/usr/local/lib'
=> "/usr/local/lib"
irb(main):013:0> have_library('gecodesearch')
checking for main() in -lgecodesearch... no
=> false
I am now trying to install a ruby gem which needs these in order to
build correctly but the gem build fails as it cannot find these
libraries.
The gem's extconf.rb file tries to confirm it can find the library with
have_library() but this fails for some reason.
I have tried setting a bunch of environment variables (see below for my
tests in irb) but nothing seems to work.
What is the best way to solve this problem?
irb(main):003:0> require 'mkmf'
=> true
irb(main):004:0> have_library('gecodesearch')
checking for main() in -lgecodesearch... no
=> false
irb(main):005:0> ENV['LD_LIBRARY_PATH']='/usr/local/lib'
=> "/usr/local/lib"
irb(main):006:0> have_library('gecodesearch')
checking for main() in -lgecodesearch... no
=> false
irb(main):007:0> ENV['DYLD_LIBRARY_PATH']='/usr/local/lib'
=> "/usr/local/lib"
irb(main):008:0> have_library('gecodesearch')
checking for main() in -lgecodesearch... no
=> false
irb(main):009:0> have_library('libgecodesearch')
checking for main() in -llibgecodesearch... no
=> false
irb(main):010:0> ENV['C_INCLUDE_PATH']='/usr/local/lib'
=> "/usr/local/lib"
irb(main):011:0> have_library('gecodesearch')
checking for main() in -lgecodesearch... no
=> false
irb(main):012:0> ENV['PATH']='/usr/local/lib'
=> "/usr/local/lib"
irb(main):013:0> have_library('gecodesearch')
checking for main() in -lgecodesearch... no
=> false
Robert Klemme
Feb 13, 2012, 2:39:56 PM2/13/12
to
On 02/13/2012 05:35 PM, Adam Russell wrote:
> I have installed some native libraries. They are in /usr/local/lib.
> I am now trying to install a ruby gem which needs these in order to
> build correctly but the gem build fails as it cannot find these
> libraries.
> The gem's extconf.rb file tries to confirm it can find the library with
> have_library() but this fails for some reason.
> I have tried setting a bunch of environment variables (see below for my
> tests in irb) but nothing seems to work.
> What is the best way to solve this problem?
Hmm, did you try
> I have installed some native libraries. They are in /usr/local/lib.
> I am now trying to install a ruby gem which needs these in order to
> build correctly but the gem build fails as it cannot find these
> libraries.
> The gem's extconf.rb file tries to confirm it can find the library with
> have_library() but this fails for some reason.
> I have tried setting a bunch of environment variables (see below for my
> tests in irb) but nothing seems to work.
> What is the best way to solve this problem?
$ LD_LIBRARY_PATH=/usr/local/lib gem install XYZ
? Maybe also export CPPFLAGS=-I/usr/local/include
Kind regards
robert
Adam Russell
Feb 13, 2012, 5:57:33 PM2/13/12
to
xman
Feb 16, 2012, 12:54:12 PM2/16/12
to
Try:
export LIBRARY_PATH=/usr/local/lib
That works for me in Linux + GCC
The LD_LIBRARY_PATH is only effective when executing, not at compile time.
export LIBRARY_PATH=/usr/local/lib
That works for me in Linux + GCC
The LD_LIBRARY_PATH is only effective when executing, not at compile time.
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