Seems like I’ve figured out what you can do I used NSClassFromString() to check if class is available on device, i.e. if NSClassFromString(“UIBlurEffect”) { let blur = UIBlurEffect(…) //… } else { //… } It’s needed to make UIKit.framework (or another corresponding framework) optional. If you create Swift-based application in XCode6-BetaX, all the frameworks wouldn’t … Read more
Is there a way to force the old behavior? Yes. You can use this option -Wl,–disable-new-dtags to tell the new linker to use the old behavior, i.e. RPATH. Is it possible to tell the old version of linker to produce the new output (i.e. RUNPATH instead of RPATH)? Yes. Use -Wl,–enable-new-dtags to tell the old … Read more
First of all, understand that an executable doesn’t contain a single rpath entry, but an array of one or more entries. Second, you can use otool to list an image’s rpath entries. Using otool -l, you’ll get output like the following, at the very end of which are the rpath entries: Load command 34 cmd … Read more
Typical CMake scripts like FindGLEW will define variables that specify the paths and files that your project needs. If the script can’t automatically identify the correct paths (usually because of nonstandard install location, which is fine), then it leaves these variables up to you to fill in. With command line CMake, you use the -D … Read more
As stated in the documentation for a build script: All the lines printed to stdout by a build script [… starting] with cargo: is interpreted directly by Cargo […] rustc-link-search indicates the specified value should be passed to the compiler as a -L flag. In your Cargo.toml: [package] name = “link-example” version = “0.1.0” authors … Read more
Please, have a look at ld and WIN32 (cygwin/mingw). Especially, the direct linking to a dll section for more information on the behavior of -l flag on Windows ports of LD. Extract: For instance, when ld is called with the argument -lxxx it will attempt to find, in the first directory of its search path, … Read more
I needed a solution to this because I have a scriptable system that has no filesystem (using blobs from a database) and needs to load binary plugins to support some scripts. This is the solution I came up with which works on FreeBSD but may not be portable. void *dlblob(const void *blob, size_t len) { … Read more
In OS X El Capitan (10.11), Apple added System Integrity Protection. This prevents programs in protected locations like /usr from calling a shared library that uses a relative reference to another shared library. In the case of _mysql.so, it contains a relative reference to the shared library libmysqlclient.18.dylib. In the future, the shared library _mysql.so … Read more
The problem is that replacing call printf@PLT with call [printf@GOTPLT] requires that the compiler knows that the function printf exists in a shared library and not a static library (or even in just a plain object file). The linker can change call printf into call printf@PLT, jmp printf into jmp printf@PLT or even mov eax, … Read more