Bug 10440 – shared library on osx: worked in 2.062, fails in 2.063 / 2.063.2

--foo.d module foo; extern(C) void foo1(){} --main.d module main; pragma(lib,"foo"); extern(C) void foo1(); void main(){foo1;} dmd -oflibfoo.dylib -shared foo.d; dmd -L-L. main.d ./main --output: 2.062:OK 2.063(and 2.063.2):NG gdb ./main Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: 13 at address: 0x0000000000000000 0x00000001000184fc in sections_osx_onAddImage ()

I noticed that shared libraries don't work in similar way in linux too, approximately after 2.063 release. This is quite sad, because this is the way dynamic linking was working in linux since 2011 autumn (or earlier).

This never worked correctly as there is no shared library support on OSX. Something that previously caused a silent misbehavior was made explicit therefor it now crashes. https://github.com/D-Programming-Language/druntime/commit/0e10e7e96c8a1d6c12bc45b143bab9364cd72755#L3L94 https://github.com/D-Programming-Language/druntime/commit/0e10e7e96c8a1d6c12bc45b143bab9364cd72755#L8R70

(In reply to comment #2) > This never worked correctly as there is no shared library support on OSX. > Something that previously caused a silent misbehavior was made explicit > therefor it now crashes. > https://github.com/D-Programming-Language/druntime/commit/0e10e7e96c8a1d6c12bc45b143bab9364cd72755#L3L94 > https://github.com/D-Programming-Language/druntime/commit/0e10e7e96c8a1d6c12bc45b143bab9364cd72755#L8R70 (In reply to comment #2) > This never worked correctly as there is no shared library support on OSX. > Something that previously caused a silent misbehavior was made explicit > therefor it now crashes. > https://github.com/D-Programming-Language/druntime/commit/0e10e7e96c8a1d6c12bc45b143bab9364cd72755#L3L94 > https://github.com/D-Programming-Language/druntime/commit/0e10e7e96c8a1d6c12bc45b143bab9364cd72755#L8R70 I still worked for a number of scenarios on which I relied on. Can you please put back the old behavior enabled by a version(use_unsafe_shared_library_osx) switch ? that way people can still use shared libraries on OSX (at their own risk) until the problem is addressed.

(In reply to comment #2) > This never worked correctly as there is no shared library support on OSX. > Something that previously caused a silent misbehavior was made explicit > therefor it now crashes. > https://github.com/D-Programming-Language/druntime/commit/0e10e7e96c8a1d6c12bc45b143bab9364cd72755#L3L94 > https://github.com/D-Programming-Language/druntime/commit/0e10e7e96c8a1d6c12bc45b143bab9364cd72755#L8R70 This does not explain crashes in linux where dynamic linking worked.

(In reply to comment #4) > This does not explain crashes in linux where dynamic linking worked. Please open a separate bug for this.

Commits pushed to master at https://github.com/D-Programming-Language/druntime https://github.com/D-Programming-Language/druntime/commit/5fc0480d13705c57daadf067801d630d1b9cd629 fix Issue 10440 - print a warning and ignore shared library sections https://github.com/D-Programming-Language/druntime/commit/4caca8b4a2f77d0a2df7c3fa833397ac694143ee Merge pull request #531 from dawgfoto/fix10440 fix Issue 10440