H. J. Lu writes: > On Tue, Jan 09, 2007 at 01:51:00PM +0000, Andrew Haley wrote: > > H. J. Lu writes: > > > On Tue, Jan 09, 2007 at 01:38:00PM +0000, Andrew Haley wrote: > > > > H. J. Lu writes: > > > > > I am enclosing a patch to implement a new linker swicth, > > > > > --dynamic-list-data. It is -Bsymbolic for function symbols only. > > > > > I tried it with C, C++, Java and Fortran on Linux/ia32, > > Linux/x86-64 > > > > > and Linux/ia64. There are only a few regressions. The function > > calls > > > > > within the new resulting DSOs will bind locally. It speeds up > > > > > the enclosed C++ testcase by > > > > > > > > > > 1. 23% on ia64. > > > > > 2. 6% on ia32. > > > > > 3. 3% on x86-64. > > > > > > > > > > Should we consider such optimization? > > > > > > > > That's a terrible name for the option. What does it mean? > > > > > > It is an extension of the current command line options: > > > > > > --dynamic-list-cpp-typeinfo Use C++ typeinfo dynamic list > > > --dynamic-list FILE Read dynamic list > > > > But you said it was like -Bsymbolic for function symbols only. What > > is the connection between C++ typeinfo and that? (Hint: Java doesn't > > use C++ typeinfo, but -Bsymbolic for function symbols only would be > > very useful.) > > --dynamic-list is a generic linker feature. Users have to provide a > list of symbols, which will be bound dynamically and everything else > is bound locally. --dynamic-list-cpp-typeinfo includes a prefined > list for C++ typeinfo. --dynamic-list-data puts data symbols on > the dynamic list.
OK, so in the case of --dynamic-list-data, there is no user-supplied list. Instead, there's (conceptually) an automatically-generated list, which contains every symbol that doesn't point to a function. Can't you just call the new option -Bsymbolic-functions? At least then people like me might have an outside chance of remembering it. Andrew.
