On Sun, Jun 24, 2007 at 01:50:51AM -0700, Russ Allbery wrote: > Felipe Sateler <fsateler@gmail.com> writes: > > Felipe Sateler wrote: > >> Policy 10.2 says we must compile shared libraries with -D_REENTRANT: > > >>> You must specify the gcc option -D_REENTRANT when building a library > >>> (either static or shared) to make the library compatible with > >>> LinuxThreads. > > >> However, LinuxThreads has been superseeded by NPTL. Is this still > >> necessary? > > > Some googling shows that _REENTRANT is necessary for POSIX threading, so > > it should be still needed. > > This just came up at DebConf, and our belief is that it's only needed to > get prototypes for a few functions that aren't prototyped otherwise. That > would imply that if your software is building without undeclared function > warnings, you don't need it. exactly, at least in the glibc, _REENTRANT is vaguely used to enable some obscure functions. It has absolutely no impact else (especially no function are diverted that way with recent libc's at least -- aka at least since etch). Note that this macro is documented in features.h and feature_test_macros(7). Cheers, -- ·O· Pierre Habouzit ··O madcoder@debian.org OOO http://www.madism.org
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