Thanks for your advice, in the meantime I have taken a sledgehammer to the problem and just removed the troublesome functions from the interface. As far as I can tell noone will miss them.
regards Kevin NB. The package is an interface from Oz (www.mozart-oz.org) to the gtk library. The interface is generated automatically from gtk header files. Albert Cahalan writes: > On Wed, 2004-08-25 at 07:52, Kevin Glynn wrote: > > Daniel Kobras writes: > > > On Tue, Aug 24, 2004 at 06:21:57PM +0200, Kevin Glynn wrote: > > > > fyi, it is because va_list is declared as a one-element array of > > > > structs on powerpc, unlike other architectures so code like: > > > > > > > > va_list Arg4 = (va_list) OZ_getForeignPointer((*(_OZ_LOC[(4)]))); > > > > > > > > fails on powerpc, because you can't cast to an array. > > > > > > And you may not assign to a va_list. Use va_copy() instead to be > > > portable. > > > > > > Daniel. > > > > > > > I don't see how va_copy will help me. OZ_getForeignPointer(...) > > returns a void*, so I will still need to cast it to a va_list to be > > able to call va_copy. Here is my test program, perhaps you can suggest > > an alternative: > > Due to some disgusting changes in the C standard, > casting from (void*) is pretty much illegal anyway. > I expect that C++ is affected as well. It has to > do with pointer aliasing. > > Use a union. Put all the types you need into the > union. So you'd use a pointer to a union, and skip > the casting. > > Use the -Wstrict-aliasing=2 compiler option. > > I use: > > -W -Wall -Wshadow -Wcast-align -Wredundant-decls \ > -Wbad-function-cast -Wcast-qual -Wwrite-strings -Waggregate-return \ > -Wstrict-prototypes -Wmissing-prototypes \ > -Wdeclaration-after-statement -Wpadded -Wstrict-aliasing=2 > > (those last 3 depending on a recent gcc) > > -- ------------- you're invited to: ------------------------- The Second International Mozart/Oz Conference (MOZ 2004) Charleroi, Belgium, Oct. 7-8, 2004 http://www.cetic.be/moz2004 ----------------------------------------------------------
