dtung@ahs.UUCP (David Tung) (08/21/90)
Does there anyone has the VAX/VMS version of alloca() function, either
assembly or C code. Is that possible to mail to me?
Thanks in advance!!!!!!!!
E-mail : uunet!ahs!dtung
~jdc@naucse.cse.nau.edu (John Campbell) (08/22/90)
From article <994@ahs.UUCP>, by dtung@ahs.UUCP (David Tung): > > > Does there anyone has the VAX/VMS version of alloca() function, either > assembly or C code. Is that possible to mail to me? > > Thanks in advance!!!!!!!! > > E-mail : uunet!ahs!dtung > > ~ It depends on what you want one for. Alloca on VAX C (DEC's own VMS implementation of C) can give you lot's of problems. In short, DEC thinks they left the stack a certain way and under the default optimizer you can get hosed. So, if you use DEC's VAX C you might or might not need to say /NOOPTIMIZE when using a stack oriented alloca(). If you want it for gnu-C then it should have come with your VMS GCC, along with some other library things. I find I can usually rewrite alloca() oriented things to call malloc() and do a free (for instance bison). If you really want an alloca() and are using VAX C then try looking into the more-or-less portable alloca() that (I think) Doug Gwynn wrote. This portable version is kicking around in the gnu area maybe in the more recent bison code. Probably Doug will say I've lied and someone else will say where the stuff really lives. Anyway, I just wanted to warn people about niave alloca's and VAX/VMS C. It took me a long time to figure out my problem once... (Sorry to move away from C++. Hard to mail to uucp addresses with our current mailer.) -- John Campbell jdc@naucse.cse.nau.edu CAMPBELL@NAUVAX.bitnet unix? Sure send me a dozen, all different colors.