Hi Armin, The test `rpython.rtyper.lltypesystem.test.TestPlatform.test_prefix` illustrates the problem quite well. Currently this test is skipped on non-linux platforms. When that is turned off, the test fails on macOS X. With `Darwin_x86.so_prefix == (‘’, )`, line ll2ctypes:1218 will fail, because it’s trying to load `c_file.dylib` rather than `libc_file.dylib`. Shared libraries on macOS X should also have ‘lib’ prefix just as on linux. According to man page of `ld`: -lx This option tells the linker to search for libx.dylib or libx.a in the library search path. If string x is of the form y.o, then that file is searched for in the same places, but without prepending `lib' or appending `.a' or `.dylib' to the filename. And on Apple developer website (https://developer.apple.com/library/content/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/DynamicLibraryDesignGuidelines.html): The filename of a dynamic library normally contains the library’s name with the lib prefix and the .dylib extension. For example, a library called Dynamo would have the filename libDynamo.dylib.
So I think it’s right to make a simple fix as suggested in the patch to include ‘lib’ in the so_prefix on Darwin platforms. The attached is a suggested solution patch. Regards, John Zhang ------------------------------------------------------ John Zhang Research Assistant Programming Languages, Design & Implementation Division Computer Systems Group ANU College of Engineering & Computer Science 108 North Rd The Australian National University Acton ACT 2601 john.zh...@anu.edu.au<mailto:john.zh...@anu.edu.au> On 1 Dec. 2016, at 04:56, Armin Rigo <armin.r...@gmail.com<mailto:armin.r...@gmail.com>> wrote: Hi John, On 30 November 2016 at 04:14, John Zhang <john.zh...@anu.edu.au<mailto:john.zh...@anu.edu.au>> wrote: `so_prefixes`. This is causing me some problems with not being able to find my shared libraries on macOS X. I’m wondering if that’s intentional, or just a mistake? It should be a simple fix if it’s a mistake. I don't know, and that's a good question. But the first question is: how does it work for PyPy on OS/X? All (or most) tests pass there. Can you pinpoint the difference? If not, can you point us to your version of the code, so that we can have a guess at what the difference might be? A bientôt, Armin.
fix_darwin_so_prefix.patch
Description: fix_darwin_so_prefix.patch
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