On Fri, 29 Mar 2013 07:01:49 -0700, Ian Lance Taylor wrote: > Are you using the -flto option? > No, not at all. The parameters used are exactly as is shown in the pastebins. > If not, when generating a shared library, GCC and presumably clang > largely defer to the linker. So, what linker are you using? Are you > using the same linker with both GCC and clang? > Yes, linker is exactly the same in both cases and it's `ld'. > What system are you on? > System is: 3.5.0-27-generic #46-Ubuntu SMP (amd64) Using also: - gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2 - clang version 3.3 (trunk 170425) - GNU ld (GNU Binutils for Ubuntu) 2.22.90.20120924 > In the pastebin links you provided, I don't see any clang shared > libraries at all. Where is clang_createIndex supposed to be defined? > In the second screenshot [0] at the bottom of the paste where I ldd the built shared library there's an SO dependency that is crucial: libclang.so.3.3 => /usr/local/lib/libclang.so.3.3 (0x00007f04d9e1c000) It's one of the dependencies dropped/ignored by GCC. > You may simply need to use the -rdynamic option with GCC. I'm so annoyed (!) I won't be near my computer until late on Sunday so I can't have a look at the -rdynamic (and -ftlo) you suggested right now. I take it you don't think there's anything wrong with GCC? Is the different behaviour between GCC and clang expected in this case? Thanks again for the invaluable input, Ian! [0] http://pastebin.com/xM8NNj4m
