>> GCC does warn if returning a pointer to a local variable (stack memory). >> But there are alot of more cases where GCC could possibly warn, >> eg. when references are made to local variables or stack memory. >> >> See this attached example code. >> GCC warns for first case, but not the others. >> I think all cases can be considered program bugs, >> and could trigger a compiler warning I think. > > Thanks. I would encourage you to file an enhancement request at > http://gcc.gnu.org/bugzilla/ . > >> I've found out that the present warning is done in "c-typeck.c", >> is this the right place to but additional warnings of this kind too? > > Since these sorts of errors can occur in both C and C++ it would be > slightly better to use a common framework for them if possible, perhaps > in c-family/c-common.c. I haven't really thought about what is required > here, though.
I've added the following enhancement request to bugzilla http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52923 "Bug 52923 - Warn if making external references to local stack memory" Thanks & Best Regards Fredrik
