Jilles Tjoelker <[email protected]> writes: > On Mon, Oct 08, 2012 at 12:17:08PM -0400, Eitan Adler wrote: >> The only difference between -lpthread and -pthread that I could see is >> that the latter also sets -D_REENTRANT. >> However, I can't find any uses of _REENTRANT anywhere outside of a few >> utilities that seem to define it manually. > >> Testing with various manually written pthread programs resulted in >> identical binaries, let alone identical results. > >> Is there an actual difference between -pthread and -lpthread or is >> this just a historical artifact? > > In some cases, -pthread also affects the compiler's code generation. On > some RISC architectures, compilers may try to avoid loads and stores of > less than 32 bits.
[...] > Because C99 does not specify threading, it allows these transformations. > In C11, they are forbidden. Passing -pthread disables them as well. And does this not happen at all if one uses -lpthread instead? _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
