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Mac Tool For Managing Environment Variables



Active5 years, 6 months ago

I am trying to install a solver written in C++ on my Mac (OS X), for use with code I have written in XCode.

The solver documentation says this:

From the Terminal with the open command (or our CLI Tool) To provide you with a configurable environment, Tower supports defining environment variables in a custom file. To make use of this, create a PLIST XML formatted file named environment.plist in ~/Library/Application Support/com.fournova.Tower3/.

Mac environment variables list

Squirrel Updates, the Slack Mac App and User Environment Variables December 2, 2016 Update: The workaround described below for disabling Squirrel updates specifically for Slack no longer works, as Slack’s Mac app as of 2.5.1 includes code to actively disable it. PATH is an environment variable that holds all the executable shell commands. When you type something in the command prompt, it will go through all the path and search for the match of the command line utility name you have just entered.

Be sure to have '.' in your DYLD_LIBRARY_PATH in order to

  • run the ready-built executables
  • link with the libamg.dylib (and the gfortran RTSlibs)

I don't really understand what this means. Where and what do I need to change what?

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I have done some googling, but haven't come across anything that is simple enough for a newbie like me! If there are any patient people out there who wouldn't mind directing me to an online resource or giving me the a-b-cs of how and where to set environment variables, I would be very grateful.

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slhck
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AntAnt

3 Answers

It's an environment variable and as such is usually set in Terminal by

man dyld says:

DYLD_LIBRARY_PATH

This is a colon separated list of directories that contain libraries. The dynamic linker searches these directories before it searches the default locations for libraries. It allows you to test new versions of existing libraries.

For each library that a program uses, the dynamic linker looks for it in each directory in DYLD_LIBRARY_PATH in turn. If it still can't find the library, it then searches DYLD_FALLBACK_FRAMEWORK_PATH and DYLD_FALLBACK_LIBRARY_PATH in turn.

Use the -L option to otool(1). to discover the frameworks and shared libraries that the executable is linked against.

Managing

You'd probably want something like

to prepend . (current directory) to the list of locations searched. On my unmodified OS X, DYLD_LIBRARY_PATH has no current value though:

Depending on how you intent to run your program, you'd need to set this differently, e.g. in Xcode (I don't know where though).

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Daniel BeckDaniel Beck
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One should never set export DYLD_LIBRARY_PATH on your system.

Mac Environment Variables List

Shared library paths can be fixed using otool -L and install_name_tool.

For instance, if you compile Perl DBD-MySQL you won't be able to use it as the linker doesn't know where you've installed MySQL.

Mac Tool For Managing Environment Variables Windows

This is as simple as that.

Mac Check Environment Variables

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In Xcode 4 you can add it to the project Scheme to avoid errors like this one:

  1. In the Menu click on 'Product' -> 'Edit Scheme' -> 'Arguments' tab -> Add 'Environment Variables' -> Key: DYLD_LIBRARY_PATH Value: /Users/MyUserAccount/path/to/lib

  2. Change the path to your user account and the full path to the library folder. https://mandenvengi.tistory.com/10.

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  3. You should be able to build and run.

Edit Environment Variables Mac

Paul SoltPaul Solt

Mac Tool For Managing Environment Variables Path

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