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authorphk <phk@FreeBSD.org>1997-02-07 20:22:15 +0000
committerphk <phk@FreeBSD.org>1997-02-07 20:22:15 +0000
commit27e71d1e4801443f6b036937c234d526fe50bf97 (patch)
tree23749b2a8c573f2b06163588d5f83fdaab063de4 /sbin/ping/ping.8
parent66962bcc3da4afa0d7f918d7addd5dc8d6437a8d (diff)
downloadFreeBSD-src-27e71d1e4801443f6b036937c234d526fe50bf97.zip
FreeBSD-src-27e71d1e4801443f6b036937c234d526fe50bf97.tar.gz
I have no idea what this is all about, but it works and Bruce hasn't
complained so it cannot be entirely bad :-) I include the email that probably explains it for people who already know: > >Compiling with -O3 inlines functions. However the function that is being > >inlined in makeinfo.c (add_word_args()) is a vararg function and must not be > >inlined. > > > >The code in question is K&R style, and AFIK, there is no way for the compiler > >to determine that the function uses vararg. Either change the code to use > >prototypes, or use stdarg, or add a directive to prevent inlining. > > Not declaring a varargs function as varargs before it is used gives > undefined behaviour. > > However, in practice the bug is probably in FreeBSD's <varargs.h>, which > doesn't use gcc's __builtin_next_arg(). gcc should notice that it is > used and not inline functions that have it. <stdarg.h.> uses it, but I > think there's another gcc builtin that it should be using. Patch attached. The ellipsis causes gcc to flag this as a varargs function, and the name "__builtin_va_alist" is special cased in gcc to hide the last argument in the arglist. Reviewed by: bde & phk Submitted by: jlemon@americantv.com (Jonathan Lemon)
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