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freely

1.0.2-x86_64-darwin-12

## Abstract For some circumstances the linker provided by Xcode writes absolute paths of dependent libraries. If you have an executable which uses `/opt/local/lib/something.dylib.0.0` for example, then you'll need to put that library in `/opt/local/lib/` every time you want to run that executable, otherwise it will fail. ## Problem So if you plan to distribute your executable and all the relative libraries with less pain, try **Freely**! It will copy libraries on which your software depends (with dependencies for that libs, I mean recursive resolving) in the specified directory (`./lib/` by default) and relocate their paths by modifying the target executable. ## Installation % gem install freely ## Example ### Compiling Okay, let's get some libs to link with: % pkg-config --libs gio-2.0 -L/opt/local/lib -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lintl Linking our *dummy* test binary: % gcc -L/opt/local/lib -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lintl test.c -o test Checking with `otool -L`: % otool -L test test: /opt/local/lib/libgio-2.0.0.dylib (compatibility version 3201.0.0, current version 3201.4.0) /opt/local/lib/libgobject-2.0.0.dylib (compatibility version 3201.0.0, current version 3201.4.0) /opt/local/lib/libglib-2.0.0.dylib (compatibility version 3201.0.0, current version 3201.4.0) /opt/local/lib/libintl.8.dylib (compatibility version 10.0.0, current version 10.1.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 169.3.0) Oh noes! Hard references all the way! It's okay if these libs are in the `/opt/local/` path, but what about that case: afroditetest: /Users/xlab/Documents/Coding/Vala/afrodite/out/libafrodite-1.0.dylib (compatibility version 0.0.0, current version 0.0.0) ............. It's in the temporary place which is going to disappear when I run `make clean` etc. How to avoid that hard referencing and produce executable which refers only on neary placed `./lib`? ### The Freely Just before running **freely**: % tree . ├── test └── test.c 0 directories, 2 files Okay, let's give it a chance: % freely ./test # Loading test # Looking for dependencies libiconv.2.dylib libintl.8.dylib libglib-2.0.0.dylib libgthread-2.0.0.dylib libffi.6.dylib libgobject-2.0.0.dylib libgmodule-2.0.0.dylib libz.1.dylib libgio-2.0.0.dylib # Copying dependencies into ./lib # Relinking dependencies /opt/local/lib/libiconv.2.dylib => lib/libiconv.2.dylib /opt/local/lib/libintl.8.dylib => lib/libintl.8.dylib ..replacing subsequent dependencies /opt/local/lib/libglib-2.0.0.dylib => lib/libglib-2.0.0.dylib ..replacing subsequent dependencies /opt/local/lib/libgthread-2.0.0.dylib => lib/libgthread-2.0.0.dylib ..replacing subsequent dependencies /opt/local/lib/libffi.6.dylib => lib/libffi.6.dylib /opt/local/lib/libgobject-2.0.0.dylib => lib/libgobject-2.0.0.dylib ..replacing subsequent dependencies /opt/local/lib/libgmodule-2.0.0.dylib => lib/libgmodule-2.0.0.dylib ..replacing subsequent dependencies /opt/local/lib/libz.1.dylib => lib/libz.1.dylib /opt/local/lib/libgio-2.0.0.dylib => lib/libgio-2.0.0.dylib ..replacing subsequent dependencies Wow! % tree . ├── lib │   ├── libffi.6.dylib │   ├── libgio-2.0.0.dylib │   ├── libglib-2.0.0.dylib │   ├── libgmodule-2.0.0.dylib │   ├── libgobject-2.0.0.dylib │   ├── libgthread-2.0.0.dylib │   ├── libiconv.2.dylib │   ├── libintl.8.dylib │   └── libz.1.dylib ├── test └── test.c 1 directory, 11 files So, here we have a complete dependecy collection in a single `./lib` directory! And what about hard links of the `test` executable? % otool -L test test: lib/libgio-2.0.0.dylib (compatibility version 3201.0.0, current version 3201.4.0) lib/libgobject-2.0.0.dylib (compatibility version 3201.0.0, current version 3201.4.0) lib/libglib-2.0.0.dylib (compatibility version 3201.0.0, current version 3201.4.0) lib/libintl.8.dylib (compatibility version 10.0.0, current version 10.1.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 169.3.0) Awesome, subsequent references are cleaned too: % otool -L lib/libintl.8.dylib lib/libintl.8.dylib: lib/libiconv.2.dylib (compatibility version 8.0.0, current version 8.1.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 169.3.0) /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 744.0.0) ### Happy end And now you can distribute your application! The executable will look only for `./lib` directory and libs in it. Referenced *system* libs will stay unchanged, since they're built-in or redistributable. ### Another options Freely - make your OSX executable very portable. Usage: freely [options] executable -p, --prefix DIR Directory name to store dependencies ("./lib" by default) -s, --silent Don't echo re-linking info -h, --help Show this help message ## License Copyright (C) 2012 Maxim Kouprianov This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution. Maxim Kouprianov <me@kc.vc>

installgem install freely -v 1.0.2
Authors

Maxim Kouprianov

2,512 total downloads 822 for this version
Owners

678700854a57cf6cb9334da7ba1f7f86

Gemfile
gem 'freely', '~> 1.0.2'
Versions
  1. 1.0.4 August 24, 2012 x86_64-darwin-12 (7.5 KB)
  2. 1.0.3 August 23, 2012 x86_64-darwin-12 (7.5 KB)
  3. 1.0.2 August 23, 2012 x86_64-darwin-12 (9.5 KB)